WO2017202279A1

WO2017202279A1 - Dust-cleaning device, dust-cleaning system consisting of dust-cleaning device, and dust-cleaning method therefor

Info

Publication number: WO2017202279A1
Application number: PCT/CN2017/085426
Authority: WO
Inventors: 朱书成
Original assignee: 河南龙成煤高效技术应用有限公司
Priority date: 2016-05-24
Filing date: 2017-05-23
Publication date: 2017-11-30
Also published as: CN105879508A; CN105879508B

Abstract

A dust-cleaning device, a dust-cleaning system consisting of the dust-cleaning device, and a dust-cleaning method therefor. The dust-cleaning device comprises: a filtering cavity (1); a filtering mechanism in the filtering cavity (1); a regeneration device (5) connected to the filtering cavity (1); a back-flushing device; and a preheating device (9). The filtering mechanism divides the space in the filtering cavity (1) into an air intake chamber (3) and an air discharge chamber (4) that are isolated. The preheating device (9) wholly preheats the filtering cavity (1).

Description

Dust removal system composed of dust removal equipment and dust removal equipment and dust removal method thereof

Technical field

The invention relates to the field of dust removing equipment and dust removing method, in particular to a dust removing device, a system and a dust removing method in the field of coal pyrolysis and biomass pyrolysis.

Background technique

There are many dust removal and dust removal equipments at normal temperature, and suitable dust collectors are selected according to the conditions of the dust to be removed. The dust collectors are divided into the following five categories according to their working principles; (1) Mechanical force dust collectors include gravity dust collectors, inertial dust collectors, centrifugal dust removal. And so on. (2) Washing type dust remover includes water bath type dust collector, foam type dust collector, venturi tube dust collector, water film type dust collector and the like. (3) The filter type dust collector includes a bag filter and a particle layer dust remover (4) electrostatic precipitator. (5) Magnetic dust collector.

The most used in the industry is the bag filter. Dust removal refers to the technique of filtering and dusting using a filter bag. The material of the filter bag includes natural fiber, chemical synthetic fiber, glass fiber and metal fiber. During the filtration process, the gas is from the outside of the filter bag to the inside. The dust on the outer surface of the filter bag is from the inside of the filter bag to the outside, and the dust is on the inner surface of the filter bag. In 1957, a pulse bag type dust collector was introduced. Handling Air Volume (Q) Handling air volume refers to the volume of gas that can be purified by the dust removal equipment per unit time. The unit is cubic meters per hour (m ³ /h) or cubic meters per hour (Nm ³ /h). It is one of the most important factors in the design of bag filter. When designing or selecting a bag filter according to the air volume, it is generally impossible to operate the dust collector in excess of the specified air volume. Otherwise, the filter bag is easily blocked, the life is shortened, the pressure loss is greatly increased, and the dust removal efficiency is also reduced; The air volume is selected too large, otherwise the equipment investment and floor space will be increased. Reasonable choices to handle air volume are often determined based on process conditions and experience.

For baghouses, the temperature at which they are used depends on two factors, the first being the highest temperature with which the filter material is subjected, and the second being that the gas temperature must be above the dew point temperature. Due to the large selection of glass fiber filter materials, the maximum temperature can be up to 280 ° C. For gases above this temperature, cooling measures must be taken. For gases below the dew point temperature, warming measures must be taken. For the bag filter, the relationship between the use temperature and the dust removal efficiency is not obvious. This is different from the electric dust removal. For the electrostatic precipitator, the temperature change affects the specific resistance of the dust and the like.

In the fields of chemical industry, petroleum, metallurgy, building materials and bio-pyrolysis, high-temperature dust-containing gas is often generated, especially in the process of low-order coal pyrolysis to generate coal-burning oil and gas, and decomposition gas, low-rank coal material in smaller granular form. The shape is rolled or pyrolyzed by the airflow, and the content of coal powder in the gas mixture generated during the pyrolysis process is very high, and the carbon-containing easily precipitated substances such as tar coke and asphalt-like substances in the mixed gas can only be in a high temperature environment. In the gaseous state, if the temperature is slightly too low or the environment changes, it is easy to precipitate from the mixed gas and adhere to the filtering mechanism, so that the filtering mechanism loses the filtering function, so that the production cannot continue. For decades, the domestic and international high dust content of mixed oil and gas dedusting problems in scientific research institutions in dozens of major countries Under the efforts, it has not been effectively solved, resulting in the low-order coal pyrolysis technology can not form industrial production, directly affecting the current world's overall coal industry pattern, the daily low-rank coal can not be clean and efficient use.

Coal tar has high content of colloid and asphaltene, and colloid and asphaltene are precursors of coking. The unit structure of colloid and asphaltene is a structure with a fused ring aromatic ring system as the core, and the difference between the two is only the molecular structure and molecular weight. When the coal tar escapes from the coal in a gaseous form, the following reaction occurs on the filter body: the asphaltene large particles are thermally depolymerized into small asphaltene particles, and the asphaltene small particles are pyrolyzed to form a fused ring compound or a polycondensed reaction graphite. The coke is formed, and the fused ring compound is pyrolyzed into an oil fraction or polycondensed into coke.

CN104147862A In order to solve the problems in the above process, a dust filtering system for a mixed gas of high temperature oil and gas, water vapor and carbon-containing easy precipitates is proposed, comprising a closed separation chamber connecting an intake duct and an exhaust duct, A filter mechanism is disposed in the closed separation chamber, an outer surface of the filter mechanism is connected to the intake pipe, an inner surface is connected to the exhaust pipe, and a filter regeneration mechanism is disposed in the dust filter system. By providing a filter body regeneration mechanism in the closed separation chamber including the connection intake duct and the exhaust duct, after the filter body is operated for a certain period of time, the filter body filtration capacity can be greatly reduced due to the tar and coal ash deposits in the surface and the pores. When it is not working properly, the filter regeneration mechanism works to restore the filter body to its proper level. Repeated regeneration directly reduces the input of the filter body and greatly improves the service life of the filter body.

U.S. Patent No. 09/271,741, the entire disclosure of which is incorporated herein incorporated by incorporated herein in its entirety in its entirety in the the the the the the the the the the the the And an outlet side for discharging the filtered synthesis gas. It is possible to accommodate two dedusting devices in one housing or to provide a separate housing for each dedusting device. The combustion air is alternately supplied to each of the rod-shaped dust removing devices to allow the other dust removing device to filter the hot unfiltered synthesis gas while burning off the oxidizable particles deposited on one of the dust removing devices. One or more switching valves are coupled to the combustion air supply for alternately supplying combustion air between the two rod-shaped dedusting devices.

CN2297238Y discloses a high-temperature gas dust removing device, which has an external heating tube, which can solve the solid-gas separation of solid particles in a gas at a high temperature, but in its patent document, a relatively clear introduction is only described in this way. Solving the problem of thermal separation of solid particles in a high temperature and high pressure environment is not involved in high gas content and high oil content.

However, the above patents still have several shortcomings:

(1) Although the technical solution disclosed in the above patent solves the problems existing in high-temperature oil and gas dust removal to some extent, as the filtration process progresses, some tar precipitates and dust are still combined to form or even rapidly form a gray cake. The surface of the filter body is easy to cause the dust removal device to be blocked faster, resulting in shortening of the normal working time of one or a group of filter bodies, especially in the process of industrial production with high atmospheric dust amount, which is not conducive to the stability of the entire interactive regeneration device. And greatly increased Add operation and maintenance costs.

(2) "Method and Apparatus for Filtering Syngas" disclosed in U.S. Patent No. 09/271,741, however, the dust removal apparatus is limited to the removal of a high-temperature gas having a small amount of gas, such as at several thousand m ³ /h. In terms of the amount of filtering of tens of thousands of m ³ /h or even larger values, the technical solution disclosed in the patent is obviously powerless. First, the filtering area is too small, and only one possible idea and idea is provided for the laboratory stage. . Second, the weak air intake is not easy to ensure the uniformity and consistency of the regeneration reaction of a large number of filters in the regenerative device, and the equilibrium of the reaction temperature cannot be obtained. In the technical solution disclosed in the U.S. patent, the heating device only heats the filtering mechanism, and the preheating of the incoming atmospheric dust removing gas and the huge dust removing device device is extremely limited because the industrially produced filtering system, The diameter is several meters or even ten meters, the height is more than ten meters to several tens of meters, the filtration gas volume can be up to tens of thousands or even tens of thousands of square meters, and the dust removal equipment that adapts to the atmospheric filtering gas is not in the preheating condition, the internal The temperature is not uniform. When high temperature oil-containing pyrolysis gas or biomass pyrolysis gas, if it encounters local cold dust removal equipment, oil and gas will quickly precipitate tar mist, and tar mist and dust particles will combine to form oily precipitates. The dust removal equipment is clogged; in the part that is partially overheated, the coke oil and gas shrinks and concentrates, and adheres to the surface of the filter mechanism and the micropores. As the filtration progresses, it also adheres to the surface and the gap of the filter cake on the surface of the filter body. The thicker it is, the more it eventually blocks the dust removal equipment that filters the synthesis gas. In addition, the Chinese patent CN104147862A does not mention the device for heating and preheating the filter mechanism. When high temperature oil-containing pyrolysis gas or biomass pyrolysis gas, if it encounters cold dust removal equipment, it will of course lead to rapid precipitation of tar. And the blockage of the dust removal equipment naturally cannot guarantee that the device operates normally during the process of interactive switching regeneration.

In addition, in the case of biomass pyrolysis, according to the current search situation, whether it is a compressed block or a bulk, the gas after pyrolysis also has oily high dust, and various dust collectors and their changes cannot It fundamentally solves the problem of dust removal in high-temperature, high-dust, high-oil gas.

Summary of the invention

In order to solve the above problems, the present invention provides a dust removing system and a dust removing method comprising the dust removing device and the dust removing device for dust-containing, tar-containing pyrolysis gas filtering dust in coal pyrolysis and biomass pyrolysis processes.

A dust removing device comprises a filtering chamber, a filtering mechanism regenerating device and a preheating device; wherein the filtering chamber is provided with a filtering mechanism, the filtering mechanism defining an isolated air inlet chamber and an outlet air in an inner space of the filtering chamber body a chamber, the inlet chamber is connected to a filter gas inlet pipe, the outlet chamber is connected to a filter gas outlet pipe; the filter chamber is provided with a dust discharge mechanism; and the preheating device preheats the filter chamber as a whole .

The inventors have found that for the dust removal of atmospheric dusty and tar-containing pyrolysis gas, the dust content in the gas mixture generated is very high due to the coal material, biomass turning or pyrolysis under the action of the gas flow, and the mixed gas The carbon-containing easily precipitated substances such as tar coke and asphalt-like substances can only exist in a gaseous state in a high-temperature environment, and the temperature is slightly exceeded. Low or once the environment changes, it is easy to precipitate slowly from the mixture. Not only due to temperature, even in the state where the filter chamber continues to be suitable for high temperature, the gas mixture with too high dust content is in the filtration process due to the relationship between molecular liquefaction, solidification and contact with the environment and temperature changes. Where the physical contact of the filter body is frequent, the phenomenon that carbon-containing easily precipitated substances such as tar coke and asphalt-like substance are precipitated from the mixed gas will gradually appear, and it is enriched in the surface of the filter body and in the micropores, and the dust in the filter gas. Quickly combine to form filter cake, and adhere to the surface of the filter cake and the gap, and continue to combine and enrich in the filter cake, hindering the process of filtering the pyrolysis gas. This is also the longest time and long time in the field of high temperature oil and gas dust removal. The problem that cannot be overcome is that, so far, there has not been an industrialized high-temperature, high-dust, oil-containing gas filtration system that continues to operate normally. After decades of research and experiments, dozens of well-known companies and well-known research institutions at home and abroad have been unable to solve the problem of dust removal in high-temperature, high-dust and oil-containing gas filtration systems.

The inventors have finally found in the long research process that the temperature uniformity between the internal cavity of the entire dust removal device and the relevant components and regions in the cavity is very critical and important. After the mixture gas containing the pyrolysis oil-prone precipitate enters the closed separation chamber, the moment when the microscopic gas molecules enter the cavity from the inlet pipe, the pressure becomes smaller due to the sudden increase of the space, and the channel of the micropore is abnormal when approaching the filter mechanism. The narrowness makes the pressure become larger, and the carbon-containing easily precipitated material is easily precipitated by the pressure change in the high temperature environment, and is liquefied into tar coke and asphalt-like material, if the gas molecules are in the process of flow, and because of local heating Uneven heating causes large-area irregular temperature distribution in the dust-removing equipment, heat radiation and heat transfer inevitably indirectly in the temperature region. Uneven irregular heat transfer distorts gas molecules and carbon-containing particles. The flow direction in the contact space between the molecular particles and the dust particles greatly increases the probability that the carbon-containing easily precipitated molecular particles collide with the dust particles and aggregate into agglomerates, and the petroleum-containing asphaltene agglomerates become larger and heavier, and thus It can maintain the gasification state, and the irregular air movement also increases the connection of tar coke molecules with dust molecules and filter bodies. Frequency increases the chance of asphaltene precipitation polymerization, the phenomenon is very liable to precipitate, such as a carbonaceous coke tar, bitumen-based material from the gas mixture, depositing rapid clogging of the filter means in normal filter dust prone.

In the prior art, by providing a heating body on the outer circumference or inside of the filter body, a preheating mechanism, such as CN105056647A and CN2297238Y, is provided in the backflushing mechanism, which is inevitably caused by uneven preheating due to limited preheating area. The dust removal requirements of atmospheric dusty, tar-containing pyrolysis gases are well solved, and the importance of uniform overall heating is not recognized in the art, that is, the existence of such problems has not been realized. In the prior art, even in order to increase the heating effect, generally more heating bodies are provided as in CN105056647A. However, since it relies on the form of heat radiation transmission, it is mainly capable of preheating the area near the filter body. The overall uniform heating of the internal space and components is still not achieved, and the increase of the built-in electric heating mechanism poses a risk and operational risk for filtering high-temperature flammable gases. In addition, it is generally believed by those skilled in the art that, in the case of large-scale dust removal equipment or laboratory pilot test or small test, the temperature of the dust removal device will soon rise to the filtered gas after the process of filtering high temperature oil and gas begins. Near the temperature value, there is no need to add a whole set of complex Miscellaneous preheating systems specifically preheat it, which is a fundamentally unnecessary behavior, so it is rare to see a record of its preheating in the prior art.

Even if there is preheating considerations, those skilled in the art believe that only by heating the filter mechanism to the temperature of the high temperature oil and gas, the problems caused by the temperature difference between the filter mechanism and the filter gas can be solved, as mentioned in the background art. As described in the comparison document. In the process of industrial production, the dust removal equipment is very large, with hundreds of volumes, thousands of cubic meters of volume, and more internal components. The high temperature preheating of the inlet and outlet chambers of the entire system, ie, the filtration environment, will result in Large economic cost; more importantly, the use of high-temperature gas or other means to heat the entire filter chamber usually introduces a large amount of high-temperature gas, and the introduced high-temperature combustion gas is easily mixed into the high-temperature oil-containing gas to be filtered, changing the heat. The degassing component reduces its economy, and the later gas separation process is more complicated. At the same time, generally high-temperature oil-containing gas is flammable and explosive. It is a dangerous behavior to preheat the whole cavity to a high temperature state by heating with high temperature gas, electric heat, etc., so preheating the high temperature oil-containing gas dust removal equipment, on the one hand It will reduce the economy of the gas to be filtered, and on the other hand, it will reduce the safety and reliability of the preheating process and filtration process by increasing the heating mechanism and switching the high temperature gas. Therefore, the general teaching in the art is that in the dust-removing process of high-temperature dust-containing and tar-containing pyrolysis gas, it is not necessary to preheat the dust removal equipment, because the pyrolysis gas starts to filter and rapidly heats the equipment; even if it is preheated, It is also unnecessary to preheat the space and components other than the filter body, because the areas and parts that are not close to the filter body are hardly involved in the filtration; it is even less conceivable to use the overall preheating because the result of the overall preheating not only increases the heating cost. And equipment costs, but also likely to bring down the economic benefits of pyrolysis gases and the overall system safety.

Preferably, the filtering mechanism is a plate filter body or a plate filter body combination.

More preferably, the filtering mechanism comprises a partition disposed in a casing of the filtering chamber, the partition defining an air inlet chamber and an air outlet chamber in an inner space of the filter chamber, wherein the partition plate is provided with a plurality of tubes a filter body fixed to the partition plate through a hole provided in the partition plate, an inner surface of the tubular filter body being connected to the air outlet chamber, and an outer surface being connected to the air inlet chamber.

Alternatively or additionally, the separator may be integral with the tubular filter body.

Further, the plurality of tubular filter bodies on the partition plate are divided into several groups, and each set of the tubular filter bodies is correspondingly provided with a set of filter mechanism backflushing devices.

The filter mechanism backflushing device may include a back blown venturi disposed in the air outlet chamber, and a backflush nozzle, the large end of the back blown venturi being connected to a surface of the partition facing the air outlet chamber The outlet end of each set of tubular filter bodies corresponds to the end of the back-flushing venturi, and one end of the back-blowing nozzle faces the small end of the back-flush venturi or extends into the opposite In the small end of the blown venturi, the other end of the blowback nozzle extends out of the housing of the filter chamber and is connected to the high temperature and high pressure gas generating device via an electromagnetic backflushing valve.

The preheating device is preferably connected to the intake chamber and/or the outlet chamber gas.

Preferably, the preheating device comprises a high temperature gas generating mechanism, a valve and a high temperature gas input pipe connected to the inlet and/or the outlet chamber; the high temperature gas inlet pipe is connected to the high temperature gas generating mechanism through a valve, the inlet The air chamber and/or the air outlet chamber are provided with an exhaust pipe.

Preferably, the inlet and/or outlet chambers are connected to the filter mechanism regeneration device.

In a preferred embodiment, the high temperature dedusting filter mechanism regeneration device includes a regenerative material input pipe coupled to the intake and/or outlet chambers.

Further, the filter chamber is provided with a safety gas replacement mechanism.

Particularly preferably, the regeneration device and the preheating device share a set of devices.

Further, the regeneration device and the preheating device are connected to the intake chamber, and the outlet chamber is connected to the regeneration device and the preheating device through a circulation line.

A dust removal system, the dust removal system is connected in parallel by two or more sets of dust removal devices.

The two or more sets of dust removing devices are integrally arranged in parallel.

A dust removal method for a dust removal system includes the following steps:

(1) using one of the preheating devices connected to the intake chamber and/or the outlet chamber of the dust removing device, and preheating one of the dust removing devices (the first dust removing device) to preheat the tar gas with high temperature and high dust a temperature close to the temperature;

(2) Passing the high-temperature high-dust tar-containing gas into the pre-heated first dust-removing device, entering from the intake chamber, passing through the filtering mechanism, entering the outlet chamber, and entering the filtered gas outlet pipe from the outlet chamber; during the filtering process, The blowing device blows off the floating ash on the surface of the filtering mechanism;

(3) After working for a period of time, the filtering capacity of the first dedusting equipment will be reduced to gradually meet the needs of the filtering work, preheating another dedusting equipment (second dedusting equipment), preheating to high temperature and high dust containing tar gas When the temperature is close, the high-temperature high-dust tar-containing gas is introduced into the second dust-removing device, and the second dust-removing device starts to work;

(4) Stop the high-dust and high-dust tar-containing gas from the first dust-removing equipment, and then pass the high-temperature safety gas to replace the high-temperature high-dust tar-containing gas in the first dust-removing device. After the replacement, turn off the first dust-removing device to filter. The gas outlet valve is fed to the intake chamber and/or the outlet chamber of the first dust removing device through the filter mechanism regeneration device to perform regeneration of the first dust removing device;

(5) When the filtering capacity of the second dust removing device cannot meet the work requirement, the first dust removing device after the regeneration switches into the filtering working state, and the second dust removing device stops the filtering work and enters the replacement and regeneration process;

(6) Two or more sets of dust removal equipment are alternately switched by "filtering-regeneration" to enable continuous operation of the entire dust removal system.

A dust removing device includes a filtering chamber, and a filtering mechanism is disposed in the filtering chamber. The filtering mechanism divides a space inside the filtering chamber into an isolated air inlet chamber and an air outlet chamber, and the air inlet surface of the filter mechanism is connected. An air inlet chamber is connected to the air outlet chamber, and the filter chamber is provided with a filter mechanism regeneration device connected to the air inlet chamber and/or the air outlet chamber, and the filter chamber is disposed on the air inlet chamber and/or the air outlet chamber. Preheating device. It is convenient to connect the inlet chambers of two or more sets of filter chambers arranged in parallel to the high-temperature high-dust filter gas inlet pipe of the tar gas, and the outlet chamber is connected with the filter gas outlet pipe of the dust-removing gas, and the filter is used. A preheating device connected to the air inlet chamber and/or the air outlet chamber is arranged on the cavity, and the cold filter chamber body is preheated to a temperature value near the temperature when the high temperature and high dust tar-containing gas enters the dust removing device, and the other filter chambers are closed at the same time. The pre-heated filter chamber is filled with high-temperature high-dust tar-containing gas, and the high-temperature high-dust tar-containing gas enters the intake chamber, enters the filter mechanism through the inlet surface of the filter mechanism, and the filtered dust is filtered by the filter mechanism. The gas surface is blocked and attached to the inlet surface of the filtering mechanism. The filtered high temperature tar-containing gas enters the outlet chamber from the outlet surface of the filtering mechanism; as the high temperature and high dust tar-containing gas is filtered, the inlet surface of the filtering mechanism is rapidly formed. The dust and the gray cake, the dust removing device is provided with a dust discharging mechanism, and the deposited dust in the air inlet chamber can be conveniently discharged from the dust removing device. The filter mechanism regeneration device can realize the removal of the floating dust and the gray cake on the filter mechanism to ensure the normal operation of the entire dust removal device.

In the prior art, in the literature on a large number of high-temperature oil-containing gas dedusting equipment and methods, there is little relevant description of heating the dedusting equipment. In a very few documents for preheating dust removal equipment, there is a heating wire provided outside the filter mechanism to heat the filter mechanism, that is, a filter body, and a filter body or a filter element is heated by a back blow mechanism, but industrialized. During the production process, the heating of the filter body and the back-blowing mechanism preheat the filter body, or even the combination of the two preheating, can only preheat the filter rod itself and a part of the cavity, and it is difficult to achieve high atmospheric temperature. Full heating of high dust oil filter mechanism. The heating wire heats the filtering mechanism. Because the filtering mechanism needs to realize the filtering function, the heating wire must not be in close contact with the surface of the filter body, but the heating of the filter body surrounded by the radiation is used, and the preheating method has a very poor effect. No matter how long it is difficult to achieve uniform temperature of the entire cavity, the safety is even worse. The backwash valve is used to heat the filter body. Because the main function of the backflush valve is to realize the backflush function of the filter body, the pipe diameter is very thin and the gas volume is small compared to the industrially produced dust removal equipment, even if there is no The intermittent action of the electromagnetic backflushing valve, the amount of gas passing is still too small, far from meeting the need for overall uniform preheating. The so-called uniformity is that the temperature of all the parts and all the parts of the inner cavity of the whole dust removing device is relatively uniform after preheating, and the result of preheating is that the temperature of each part of the inner part of the dust removing device is uniform or substantially uniform. The overall preheating range is the area or location within the dedusting equipment that may or may be in contact with the filtered gas.

The invention comprehensively and comprehensively preheats the air inlet chamber and the air outlet chamber, so that the temperature of each region and each component in the dust removing device is relatively uniform, and the high temperature, high oil, high dust gas molecules entering in the environment with uniform temperature will Faced with less temperature changes and physical changes, even under the action of dust, local spatial state changes and agglomeration are less likely to occur, greatly improving the single-use time of the dust removal equipment in ensuring filtration capacity. The overall preheating of the preheating mechanism, such as high temperature and high temperature gas The body directly enters the air inlet chamber or/and the air outlet chamber to heat the dust removal device as a whole, and can achieve the following three characteristics: contact type, no dead angle, heating temperature and precise control of the heating process, and fast preheating speed, energy saving, economic benefit Significant; the other heating methods of the overall heating, such as the outer layer of the hot air, the whole part of the cavity around the heating components, etc. can also achieve no dead angle, all-around preheating, preheating results are basically the same temperature in the dust removal equipment, but more It is still preferred to have a preheated version of a plurality of high temperature gas monolithic heating dedusting equipment with recycle gas participation. In addition, it is very important that, due to the overall preheating method, during the filtration process, the internal components of the dust removal device cavity, the filter body, the separator, the back-flush venturi, and the like are relatively uniform in temperature, and the heat in the cavity is relatively uniform. The transfer is less, the filtration performance of the filtering mechanism in the surrounding area and the central filtration zone is consistent, the formation of precipitates and ash cake is consistent, the effect of backflushing is consistent, and even the progress of regeneration in the regeneration process is consistent, greatly improving the system. Controllability, operational reliability and consistency. At the same time, the switching frequency and the regeneration frequency between the two or more filter chambers are reduced, and the single regeneration time of the dust removal device is shortened, thereby ensuring the filtering effect of the dust removal device. It is avoided that the partial filter body loses the filtering function during the filtering process, and some of the filter body is still in a good working state, resulting in a large number of filtering mechanism work unsynchronized. The unsynchronized results not only affect the quality and effect of the filtration, but also the difference in the amount of putty on the surface of the filter mechanism in different regions. The amount of ash generated in different regions of the filter mechanism is different, and the situation of bridging is different. The so-called bridging is because the large amount of dust is connected together between the filter bodies, and the space in which the gas flows is lost in this part, and a large expansion force is generated between the adjacent filter bodies. The result of the unsynchronization will also bring about some bridges between the filter bodies. In some places, there are no bridges. In some places, the bridges are serious. In some places, the bridging phenomenon is relatively light, so the filter mechanism generated by the bridges. The lateral expansion force of the part is also inconsistent, which causes the partial filter body to break, which not only significantly affects the filtration effect of the filter body, but also directly affects the service life of the dust removal equipment. In addition, because the working process of the filtering mechanism is not synchronized, it will bring serious problems in the backflushing process. Similarly, the backflushing volume and the backflushing frequency have significant differences in pressure and flow rate for the filter body whose filtering state is not synchronized. The blowing process will directly lead to excessive pressure difference between different filtering mechanisms, which may bring danger. Furthermore, in the process of regeneration of the filter body, because of the difference in the amount of ash in the filter mechanism of different regions, the difference in the amount of coke contained in the gray cake, it is inevitable that some of the filter body regeneration has already ended, and some filter bodies are insufficiently regenerated. Seriously affect the use effect and service life of the dust removal equipment.

The molecular state of oil and gas is inherently unstable. In high temperature environments, two or more organic molecules interact with each other to form a macromolecule in the form of a covalent bond due to endotherm, accompanied by small molecules. Breaking away and continuously undergoing a condensation reaction, the molecules are coked from a gaseous liquid to a solid state, and combined with dust to produce a gray cake hinders filtration. The technical solution of the invention preheats the filter chamber as a whole, the filtration environment temperature is relatively uniform and stable, the probability of pyrolysis and polycondensation reaction of the asphaltene is greatly reduced, and the low temperature liquefaction phenomenon does not occur, and the tar coke and the asphalt-like material are precipitated. The reduction in the amount directly inhibits the rate of filter cake formation. For each filter mechanism or filter body, a slight problem will bring about the rapid generation of filter cake and cause the filter mechanism to be invalid or scrapped, which directly affects the normal working process of large-scale high-temperature chemical equipment for continuous operation. It is the most difficult to deal with the most important key technical links in the process. The reduction of the amount of filter cake produced and the reduction of the production rate will greatly reduce the frequency and processing difficulty of the regeneration mechanism of the filter mechanism, and increase the rate at which the filter mechanism recovers the filtration capacity, thereby overcoming the present. A long-standing technical problem in the field.

In the present invention, by providing the filter mechanism as a plate filter body or a plate filter body combination, it is possible to better adapt to the current state of the art development, the plate filter body is easy to process, easy to realize large-scale, and easy to use in use. Installation, sealing, replacement and commissioning, especially the combination of plate filters, can also solve the problem of too small filter area, low filtration capacity and low filtration capacity of single plate filter. In addition, with the further development of new materials and new processes, the structure of the panel filter will be more reliable and durable, and easy to assemble and disassemble.

For the purposes of the present invention, by providing the filter mechanism in the form of a combination of a baffle and a plurality of tubular filter bodies, a counterbore is provided in the baffle, and the tubular filter body is fixed to the baffle through the counterbore, An inner surface of the tubular filter body is coupled to the outlet chamber, and an outer surface is coupled to the inlet chamber. The combination of the partition plate and the plurality of tubular filter bodies solves the problem that the quality of the filter body produced by the large plate type or plate type combination cannot be well ensured, and the tubular dust removing device improves the inner and outer surfaces and the internal filtering by the structure of the cylinder. The micropore-bonded construction provides durability and filtration performance stability, while a separator is used to divide the dust removal device cavity into two spaces, and a plurality of or a large number of tubular filter bodies can greatly increase the filter body in a certain space. The filtered working area greatly increases the amount of filtered air and is suitable for large-scale industrial production.

a dust removing device is provided with a filtering mechanism physical cleaning mechanism, such as a filtering mechanism backflushing device disposed in the air outlet chamber, such as a high temperature resistant brush that periodically performs physical contact brushing to remove the surface of the filtering mechanism, or is The filtering mechanism performs the air cleaning mechanism of the airflow blowing, or is arranged in the air outlet chamber, and after the filter air inlet pipe valve is closed, the mechanism for realizing the instantaneous negative pressure to the air inlet chamber is to achieve the cleaning of the floating dust on the surface of the filtering mechanism.

For the purposes of the present invention, the plurality of tubular filter bodies on the separator are divided into groups, and each set of tubular filter bodies is provided with a set of filter mechanism backflushing devices. The reason why it is divided into multiple groups, in the process of normal operation of the filtering mechanism, a set of filtering mechanism backflushing device can be started, and other filtering mechanism backflushing devices are not opened, so as to avoid backflushing of all filtering mechanism backflushing devices at the same time. It brings the blockage of high temperature and high dust tar-containing gas flow in the whole system and the pressure increase in the dust removal equipment, which affects the normal operation of the whole system and even acts on the pyrolysis system and brings danger. Several sets of filter bodies are controlled by a set of back-blowing control mechanisms, and a group of intermittent back-blows can ensure that a group of back-flushing is in the process of backflushing, and the remaining sets of filters are still being filtered, thereby making the dust-removing equipment The overall filtering work is not affected by the big ones.

For the purpose of the present invention, the filter mechanism backflushing device includes a back-flushing venturi disposed in the air outlet chamber, and the large-mouth end of the back-blown venturi is connected to a surface of the partition plate facing the air outlet chamber. The outlet end of each set of tubular filter body extends into the large end of the back-flush venturi, and a backflushing nozzle is disposed at the small end of the blowback venturi, and the back-blowing nozzle extends the filtering The cavity housing is connected to the high temperature and high pressure gas generating device through an electromagnetic backflushing valve. Filter mechanism used for a while After that, a certain amount of floating dust will be generated on the surface, and the electromagnetic backflushing valve will be opened periodically. The high temperature and high pressure gas will be sprayed through the backflushing nozzle, and a negative pressure will be formed at the small end of the venturi to drive the dust removal device out of the mouth in Wen. The filtered gas around the small end of the tube enters the venturi tube together, and a pressurized transmission filter is generated at the large end of the venturi, and the dust of the filter body, particularly the inlet surface of the filter body, is blown off, so that it can continue working.

For the purposes of the present invention, the preheating device includes a high temperature gas input pipe connected to the intake chamber and/or the outlet chamber, the high temperature gas input tube being connected to the high temperature gas generating mechanism through a valve, the inlet chamber and/or Or set the exhaust pipe in the air outlet. Through the use of the preheating device, the cold dust removing device can be heated to reach a temperature substantially equal to the temperature of the high temperature dust-containing tar-containing gas, firstly avoiding the tar in the high-temperature dust-containing tar-containing gas being cooled in the dust removing device. Precipitation and thermal coking solve the problem that the coke oil precipitates and/or coke quickly combine with the dust to make the gray cake unrestricted and thicken, and block the gray cake and the filter space to lose the filtering function. After preheating the dust removal equipment, the unfiltered coal pyrolysis gas can be filtered into the dust removal equipment through the opening and closing of the valves on the corresponding pipelines.

In the present invention, the filter mechanism regeneration device includes a regeneration material input pipe connected to the intake chamber and/or the outlet chamber. By introducing a regenerative material input pipe into the intake chamber and/or the outlet chamber, the oxygen-depleted gas can be introduced into the intake chamber or the outlet chamber when the dedusting device is not working, and the filter body or the filter pores will be attached to the filter body. The carbon-based oxide in the control is slowly oxidized and the product is discharged from the discharge mechanism. In the present invention, the filter chamber is provided with a safety gas replacement mechanism, and the safety gas replacement mechanism is used to replace the remaining high-temperature high-dust tar-containing gas in the air inlet chamber and the air outlet chamber into the gas outlet conduit. Avoid the violent reaction of the oxygen-poor gas into the dust removal equipment and the high-temperature high-dust tar-containing gas, and even an accident.

The present invention provides a dust removal system that is connected in parallel by two or more sets of dust removal devices. Parallel dust removal equipment enables complete online regeneration without interruption. When the carbon-based oxidant on the surface of the filtering mechanism at work has gradually failed to solve the problem of clogging by the back-blowing mechanism, or because the filter body may directly damage the filtering system due to the bridging phenomenon, the preheating mechanism will be used. After the whole temperature of the filter chamber is preheated to the high temperature and high dust tar-containing gas and enters the temperature value of the dust removal device, the high temperature and high dust tar-containing gas is switched to the filter chamber after preheating through the pipeline, and the shutdown is not working normally. Filtering the cavity, the inability to work, is that the gray cake on the surface of the filter body is too thick and too dense, and the gas passing capacity is significantly decreased; the safety gas is introduced into the filtered filter chamber, and the high temperature and high dust in the filter chamber are replaced. After the tar-containing gas is replaced, it is regenerated by a filter mechanism regeneration device. The regeneration device inputs oxygen-depleted gas from the intake chamber and/or the outlet chamber, and the tar, pulverized coal, etc. attached to the filter mechanism. The formed gray cake can be oxidized by oxidation, and the product is discharged from the exhaust pipe or the exhaust passage in the preheating mechanism, leaving The non-combustible ash falls into the lower part of the air intake chamber of the dust removal device. When the regeneration activity in the filtration chamber ends or basically ends during the regeneration process, the regeneration is stopped, and the next time the filter is switched into the filtering work; the filter-regeneration is performed by two or more sets of filter chambers. Switching between each other enables the entire dust removal device to work continuously.

The dust removal method of the dust removal system includes the following steps:

(1) using one of the preheating devices connected to the intake chamber and/or the outlet chamber of the filter chamber, preheating one of the dust removing devices (the first dust removing device), preheating to the high temperature and high dust containing tar The temperature at which the gas temperature value is close to; (2) the high-temperature high-dust tar-containing gas is introduced into the pre-heated first dust-removing device, enters from the air-intake chamber, passes through the filtering mechanism, enters the air outlet chamber, and enters the filter gas outlet pipe from the air outlet chamber. During the filtration process, the backflushing device is implemented by an orderly, sequential, intermittent backflushing control to blow off the floating ash on the surface of the filtering mechanism; (3) after working for a period of time, the filtering capacity of the first dust removing device is reduced to When it is unable to meet the filtration work requirements, preheat another dust removal device (second dust removal device), and preheat it to a temperature corresponding to the high temperature and high dust tar gas, and pass the high temperature high dust tar gas to the second dust removal device. The second dust removal equipment starts to work; (4) stop the high-dust high-dust tar-containing gas from entering the first dust removal equipment, and then pass the high-temperature safety gas to replace the high-temperature high-dust tar-containing gas in the first dust removal equipment, and replace the replaced The body enters the filter gas outlet pipe, and after the replacement is completed, the first dust removal device filter gas outlet pipe valve is closed, and the oxygen removal gas is input to the intake chamber and/or the outlet chamber of the first dust removal device through the filter mechanism regeneration device to perform the first dust removal. (5) When the filtering capacity of the second dust removing device fails to meet the work requirements, the first dust removing device after the regeneration switches into the filtering working state, and the second dust removing device stops the filtering work and enters the replacement and regeneration program; (6) Two or more sets of dust removal equipment are alternately switched by "filtering-regeneration" to enable continuous operation of the entire dust removal equipment.

BRIEF DESCRIPTION OF THE DRAWINGS:

The present invention will be further described below in conjunction with the accompanying drawings:

1 is a schematic structural view of a dust removing device according to an embodiment of the present invention;

2 is a schematic structural view of a dust removing device according to Embodiment 2 of the present invention;

3 is a schematic structural view of a dust removing device according to Embodiment 3 of the present invention;

4 is a schematic structural view of a dust removing device according to Embodiment 4 of the present invention;

Figure 5 is a schematic structural view of a dust removing device according to a fifth embodiment of the present invention;

Figure 6 is a cross-sectional view showing a tubular filter body in the dust removing device of the fifth embodiment of the present invention;

7 is a schematic structural view showing a schematic view of a fifth separator according to an embodiment of the present invention;

Figure 8 is a cross-sectional view showing the installation of a separator, a back-flush venturi, and a filter body according to a fifth embodiment of the present invention;

9 is a schematic structural view of a dust removing device according to Embodiment 6 of the present invention;

10 is a schematic structural view of a dust removing device according to Embodiment 7 of the present invention;

Figure 11 is a schematic structural view of a preheating device for a dust removing device according to an eighth embodiment of the present invention;

Figure 12 is a schematic structural view of a preheating device for a dust removing device according to an embodiment of the present invention;

Figure 13 is a schematic structural view of a ten dust removing device according to an embodiment of the present invention;

Figure 14 is a schematic structural view of a dust removing system according to an eleventh embodiment of the present invention;

Figure 15 is a schematic structural view of a dust removing system of a twelfth embodiment of the present invention;

Figure 16 is a schematic structural view of a dust removing system of a thirteenth embodiment of the present invention;

Figure 17 is a schematic structural view of a dust removing system of a fourteenth embodiment of the present invention;

18 is a schematic structural view of a dust removing system of a sixteenth embodiment of the present invention;

Figure 19 is a schematic structural view of a dust removing system of a seventeenth embodiment of the present invention;

20 is a schematic structural view of an eighteen dust removing system according to an embodiment of the present invention;

Figure 21 is a schematic structural view of a dust removing system according to a nineteenth embodiment of the present invention;

Figure 22 is a schematic structural view of a dust removing system according to an embodiment of the present invention;

23 is a schematic structural view of a dust removal system according to an embodiment of the present invention;

Figure 24 is a schematic structural view of a twenty-two dust removing system according to an embodiment of the present invention;

Figure 25 is a schematic structural view of a twenty-third dust removing system according to an embodiment of the present invention;

Figure 26 is a schematic structural view of a twenty-four dust removing system according to an embodiment of the present invention;

[Correct according to Rule 91 20.06.2017]
deleted.

Figure 27 is a schematic structural view of a twenty-fifth dust removal system according to an embodiment of the present invention;

28 is a schematic structural view of a twenty-six dust removing system according to an embodiment of the present invention;

Figure 29 is a schematic view showing the structure of a twenty-seventh dust removing system according to an embodiment of the present invention.

detailed description:

Embodiment 1:

As shown in FIG. 1 , a dust removal device includes a filter chamber 1 , in which a plate filter body 2 is disposed, and a plate filter body 2 is disposed in a middle portion of the container of the filter chamber 1 , and the plate filter body 2 The circumferential direction is sealed with the inner wall of the filter chamber 1. The plate filter body 2 divides the inner space of the filter chamber 1 into an isolated intake chamber 3 and an outlet chamber 4, and the inlet surface 2A of the plate filter body 2 is connected to the inlet chamber. 3, the outlet surface 2B is connected to the outlet chamber 4, and the high-temperature high-dust tar-containing gas enters the intake chamber 3 from the high-temperature high-dust tar-containing gas-containing filter gas inlet pipe 11, and is filtered through the plate filter body 2 into the outlet chamber 4, and then enters the filter. The gas outlet pipe 12 enters the next process. The filter chamber 1 is provided with a filter mechanism regeneration device 5 connected to the intake chamber 3, and the filter mechanism regeneration device 5 provides an input of oxygen-depleted gas during regeneration of the device, including an oxygen-lean gas input pipe 6, the oxygen-depleted gas The body input pipe 6 is connected to the intake chamber 3, and an exhaust pipe 7 is provided in the intake chamber 3. When the filtering device 2 of the dedusting device being filtered cannot be blocked to meet the filtering needs, the filtration is stopped, and an appropriate amount of oxygen is input by the oxygen-lean gas input pipe 6. The gas oxidizes the oxidizable particles deposited on the surface of the blocked filter body 2 to restore the gas permeability of the filter body, and an appropriate amount of oxygen-poor oxygen-containing gas controls the oxidation rate of the oxidizable particles deposited on the surface of the filter body and the regeneration of the dust removing device. The temperature at the time. The filter chamber 1 is provided with a preheating device 9 composed of a fuel pipe and a valve, a blower, a duct and a valve, a burner, a combustion chamber, a combustion gas outlet pipe, and the combustion gas outlet pipe It is connected with the air inlet chamber 3 of the dust removing device, and the heat generated by the combustion chamber is connected to the air inlet chamber 3 of the dust removing device through the combustion gas outlet pipe, and the heat is continuously sent to the dust removing device, so that the temperature of the dust removing device reaches the temperature of the coal pyrolysis oil and gas. The air inlet chamber 3 and the air outlet chamber 4 of the dust removing device are equipped with a temperature measuring device and a pressure measuring device for controlling the temperature and pressure of the preheating and regeneration process of the dust removing device. The outer side or/and the inner side of the outer casing of the dust removing device are wrapped with a heat insulating material to facilitate the heat preservation of the casing, and the coal pyrolysis oil and gas is not easy to precipitate tar on the casing. The dust removal device is provided with a ash discharge mechanism 16, preferably a bottom, and the ash discharge mechanism 16 includes a ash discharge pipe and a ash discharge valve.

Embodiment 2:

As shown in FIG. 2, a dust removing device includes a filter chamber 1 in which a plate filter body 2 is disposed, and a plate filter body 2 is disposed in a middle portion of the container of the filter chamber 1, and the plate filter body 2 The circumferential direction is sealed with the inner wall of the filter chamber 1, and the plate filter body 2 divides the inner space of the filter chamber 1 into an isolated intake chamber 3 and an outlet chamber 4, and the inlet surface of the plate filter body 2 is connected to the inlet chamber 3. The outlet surface is connected to the outlet chamber 4, and the high-temperature high-dust tar-containing gas enters the intake chamber 3 from the high-temperature high-dust tar-containing gas-containing filter gas inlet pipe 11, and is filtered through the plate filter body 2 into the outlet chamber 4, and then enters the filter gas outlet. The trachea 12 goes into the next procedure. The filter chamber 1 is provided with a filter mechanism regeneration device 5 connected to the intake chamber 3, including an oxygen-lean gas input pipe 6, and the oxygen-lean gas input pipe 6 is connected to the intake chamber 3, and in addition, in the filter An exhaust pipe 7 is provided on the gas outlet pipe 12. When the filter device 2 of the dust removal device being filtered is clogged, an appropriate amount of oxygen-depleted gas is input through the oxygen-lean gas input pipe 6, so that the oxidizable particles deposited on the surface of the plugged filter 2 are oxidized, and the gas permeability of the filter body is restored. An appropriate amount of oxygen-depleted gas controls the oxidation rate of the oxidizable particles deposited on the surface of the filter body and the temperature at which the dust removal device is regenerated. A filter mechanism backflushing device 8 is disposed in the air outlet chamber 4, and the filter chamber 1 is provided with a preheating device 9 which is composed of a fuel pipe and a valve, a blower, a duct and a valve, a burner, and a combustion a combustion chamber outlet pipe is connected to the combustion gas outlet pipe, and the heat generated by the combustion chamber is continuously sent to the dust removal device through the combustion gas outlet pipe, so that the temperature of the dust removal device reaches the coal pyrolysis oil and gas temperature. A dust discharging mechanism 16 is disposed at the bottom of the dust removing device, and the dust discharging mechanism 16 includes a ash discharging pipe and a ash discharging valve.

Embodiment 3:

As shown in FIG. 3, a dust removing device includes a filter chamber 1 in which a plate filter body 2 is disposed, and a plate filter body 2 is disposed in a middle portion of the container of the filter chamber 1, and the plate filter body 2 The circumferential direction is sealed with the inner wall of the filter chamber 1. The plate filter body 2 divides the inner space of the filter chamber 1 into an isolated intake chamber 3 and an outlet chamber 4, and the inlet surface 2A of the plate filter body 2 is connected to the inlet chamber. 3, the gas outlet surface 2B is connected to the gas chamber 4, the high temperature and high dust containing tar gas from the high temperature and high dust containing tar oil The filtered gas inlet pipe 11 of the body enters the intake chamber 3, passes through the filtration of the plate filter body 2, enters the outlet chamber 4, and enters the filtered gas outlet pipe 12, and proceeds to the next process. The filter chamber 1 is provided with a filter mechanism regeneration device 5 connected to the intake chamber 3, and the filter mechanism regeneration device 5 completes the input of the oxygen-depleted gas when the system needs to be regenerated, including the oxygen-lean gas input pipe 6, the lean The oxygen gas inlet pipe 6 is connected to the intake chamber 3, and an exhaust pipe 7 is provided on the filter gas outlet pipe 12. When the filtering device 2 of the dedusting device being filtered is clogged, the filtration is stopped, and an appropriate amount of oxygen-depleted gas is input through the oxygen-lean gas input pipe 6, so that the oxidizable particles deposited on the surface of the plugged filter 2 are oxidized, and the filter body is restored. The gas permeability, an appropriate amount of oxygen-poor aerobic gas controls the oxidation rate of the oxidizable particles deposited on the surface of the filter body and the temperature at which the dust removal device is regenerated. A filter mechanism backflushing device 8 is disposed in the air outlet chamber 4, and the filter chamber 1 is provided with a preheating device 9 which is composed of a fuel pipe and a valve, a blower, a duct and a valve, a burner, and a combustion a combustion chamber outlet pipe is connected to the combustion gas outlet pipe, and the heat generated by the combustion chamber is connected to the dust extraction device inlet cavity 3 through the combustion gas outlet pipe, and the heat is continuously sent to the dust removal device. So that the temperature of the dust removal equipment reaches the temperature of the coal pyrolysis oil and gas. The dust removal device is provided with a ash discharge mechanism 16, preferably a bottom, and the ash discharge mechanism 16 includes a ash discharge pipe and a ash discharge valve.

Embodiment 4:

As shown in FIG. 4, a dust removing device includes two sets of filter chambers 1 arranged in parallel, in which a plate filter body 2 is disposed, and a plate filter body 2 is disposed in the middle of the container of the filter chamber 1. The circumferential direction of the plate filter body 2 is sealed with the inner wall of the

dust removing device

30A, 30B, and the plate filter body 2 divides the inner space of the filter cavity 1 into the isolated air inlet chamber 3 and the air outlet chamber 4, and the air inlet of the plate type filter body 2 The surface is connected to the inlet chamber 3, and the outlet surface is connected to the outlet chamber 4. The high temperature and high dust tar-containing gas enters the inlet chamber 3 from the high-temperature high-dust tar-containing gas-containing filter gas inlet pipe 11, and is filtered through the plate filter body 2 into the outlet chamber 4 Then enter the filtered gas outlet pipe 12 and proceed to the next procedure. The filter chamber 1 is provided with a filter mechanism regeneration device 5 connected to the outlet chamber 4, and the filter mechanism regeneration device 5 completes the input of the oxygen-depleted gas when the system needs to be regenerated, including the oxygen-lean gas input pipe 6, the oxygen-depleted gas The body inlet pipe 6 is connected to the outlet chamber 4, and an exhaust pipe 7 is provided in the outlet chamber 4. When the filter device 2 of the dust removal device being filtered is clogged, an appropriate amount of oxygen-depleted gas is input through the oxygen-lean gas input pipe 6, so that the oxidizable particles deposited on the surface of the plugged filter 2 are oxidized, and the gas permeability of the filter body is restored. An appropriate amount of oxygen-poor aerobic gas controls the oxidation rate of the oxidizable particles deposited on the surface of the filter body and the temperature at which the dust removing device is regenerated, so that when a set of dust removing device 30A is regenerated, another set of dust removing device 30B passes through the corresponding pipe. The valve switches first to filter coal pyrolysis oil or biomass pyrolysis gas. A filter mechanism backflushing device 8 is disposed in the air outlet chamber 4, and the filter chamber 1 is provided with a preheating device 9 which is composed of a fuel pipe and a valve, a blower, a duct and a valve, a burner, and a combustion a combustion chamber outlet pipe is connected to the combustion gas outlet pipe, and the heat generated by the combustion chamber is continuously sent to the dust removal device through the combustion gas outlet pipe, so that the temperature of the dust removal device reaches coal pyrolysis The temperature of the oil and gas. A dust discharging mechanism 16 is disposed at the bottom of the dust removing device, and the dust discharging mechanism 16 includes a ash discharging pipe and a ash discharging valve.

Embodiment 5:

As shown in Figure 5, Figure 6, Figure 7, Figure 8:

A dust removing device comprises a filtering chamber 1. The outer casing and the inner wall of the filtering chamber 1 are wrapped with a heat insulating material to facilitate the heat preservation of the casing, and the coal pyrolysis oil and gas is not easy to precipitate tar on the inner wall of the casing. A filter mechanism is disposed in the filter chamber 1, and the filter mechanism includes a combination of a partition plate 13 and 500 tubular filter bodies 2, each having a diameter of 60 mm and a length of 1500 mm, and 500 sinks are disposed on the partition plate 13. The hole 14 is fixed to the partition plate 13 through the counterbore 14, and the counterbore 14 can pass through the filter body 2, but the head of the filter body cannot pass, and the filter body functions as a positioning bracket. The filter body of the dust removal device is a hollow rod-shaped structure with a closed bottom and a head opening, the outer diameter of the opening portion is larger than the outer diameter of other parts of the rod body, and the filter body is made of a ceramic material resistant to high temperature or a sintered porous material of metal or alloy fine powder. The inner surface 2B of the tubular filter body 2 is connected to the outlet chamber 4, and the outer surface 2A is connected to the inlet chamber 3. The coal pyrolysis gas enters from the outer surface 2A of the dust removing device, enters the filter body through the micropores of the filter body, and enters the air outlet chamber of the dust removing device from the inner surface 2B of the dust removing device. The plurality of tubular filter bodies 2 on the partition plate 12 are divided into several groups, and each set of the tubular filter bodies 2 is correspondingly provided with a set of filter mechanism backflushing devices 8. The filter mechanism backflushing device 8 includes a back blown venturi 17 disposed in the air outlet chamber 4, and the large end of the back blown venturi 17 is connected to the surface of the partition plate 13 facing the air outlet chamber and surrounded a plurality of tubular filter body heads, the outlet end of each of the tubular filter bodies 2 correspondingly extending into the large end of the back-flush venturi tube 17, and the back-blown venturi 17 is provided with a back blow at the small end A nozzle 14 extending from the filter chamber housing and connected to the high temperature and high pressure gas generating device via an electromagnetic backflushing valve 18. 20 tubular filters 2, a backflushing nozzle 14, an electromagnetic backflushing valve 18 and a backflushing venturi form a filtration and backflushing unit, and the dedusting device consists of 25 filtering and backflushing units. After the filter mechanism is used for a while, a certain amount of floating dust is generated on the surface, and the electromagnetic backflushing valve 18 is periodically opened, and the high temperature and high pressure gas is ejected through the back blowing nozzle 14, forming a negative at the inlet end of the back blown venturi 17. The pressure is applied to the surrounding filtered gas to be blown into the filter body 2, and the dust of the body of the filter body 2, particularly the filter inlet surface 2A, is blown off to continue the operation. When the filter chamber is in backflushing, usually one of the filter backflushing units is backflushing, and the remaining 24 are filtered, and the backflushing of the plurality of units is not performed at the same time, and does not affect the normal filtration of the entire filter chamber. The coal dust under the filtering and backflushing of the dust removing device falls into the bottom of the intake chamber and is discharged through the ash discharging mechanism 16.

The preheating device 9 includes a high temperature gas input pipe 10 connected to an intake chamber, and the high temperature gas input pipe 10 is connected to a high temperature gas generating mechanism through a valve, and an exhaust pipe 7 is disposed in the air outlet chamber 4. Through the use of the preheating device 9, the cold dust removing device can be heated to a temperature substantially equal to the temperature of the coal pyrolysis oil, firstly the tar in the coal pyrolysis oil and gas is cooled out in the dust removing device, It avoids the situation that the coke oil and oil reacts coldly and quickly blocks the filter body together with the coal dust. After preheating the dust removal equipment, the unfiltered coal pyrolysis gas can be filtered into the dust removal device by switching the valves on the corresponding pipelines. The filter mechanism regeneration device 5 includes a connection with the intake chamber 3 The regenerative material is connected to the tube 6. By introducing the regenerative material input pipe 6 into the intake chamber, the oxygen-depleted gas can be injected into the intake chamber 6 when the dedusting device is not working, and the carbon and hydrocarbon adhering to the filter body 2 or filtering the pores can be The compound or oxide can be slowly oxidized, and the product is discharged from the gas outlet chamber 4, and the non-combustible material is broken and falls into the bottom of the inlet chamber of the dust removing device.

The filter chamber is provided with a safety gas replacement mechanism 15 for converting the remaining high-temperature high-dust tar-containing gas in the intake chamber 3 and the outlet chamber 4 by a safety gas replacement mechanism before the regeneration thereof, thereby preventing the oxygen-depleted gas from entering. It reacts violently with high-temperature, high-dust, tar-containing gas, and even a safety accident. A dust discharging mechanism 16 is disposed at the bottom of the dust removing device, and the dust discharging mechanism 16 includes a ash discharging pipe and a ash discharging valve. The high-temperature high-dust tar-containing gas enters the intake chamber 3 from the high-temperature high-dust tar-containing gas-containing gas inlet pipe 11, passes through the filter of the plate filter body 2, enters the outlet chamber 4, and enters the filtered gas outlet pipe 12, and proceeds to the next process. The filter chamber 1 is provided with a filter mechanism regeneration device 5 connected to the intake chamber 3, and the filter mechanism regeneration device 5 completes the input of the oxygen-depleted gas when the system needs to be regenerated, including the oxygen-lean gas input pipe 6, the lean The oxygen gas inlet pipe 6 is connected to the intake chamber 3, and an exhaust pipe 7 is provided on the filter gas outlet pipe 12. When the filter device 2 of the dust removal device being filtered is clogged, an appropriate amount of oxygen-depleted gas is input through the oxygen-lean gas input pipe 6, so that the oxidizable particles deposited on the surface of the plugged filter 2 are oxidized, and the gas permeability of the filter body is restored. An appropriate amount of oxygen-poor aerobic gas controls the oxidation rate of the oxidizable particles deposited on the surface of the filter body and the temperature at which the dust removal device is regenerated. A filter mechanism backflushing device 8 is disposed in the air outlet chamber 4, and the pre-heating device 9 is disposed on the

dust removing device

30A, 30B. The preheating device 9 is composed of a fuel pipe and a valve, a blower, a duct and a valve, a burner, The combustion chamber and the combustion gas outlet pipe are composed, and the combustion gas outlet pipe is connected with the air inlet chamber 3 of the dust removing device, and the heat generated by the combustion chamber is continuously sent to the dust removing device through the combustion gas outlet pipe, so that the temperature of the dust removing device reaches the coal heat The temperature of the oil and gas is about 450 °C.

Comparative example 1:

The difference between this comparative example and the fifth embodiment lies only in the difference in the preheating mechanism. In this comparative example, there is no large amount of preheated gas, but an electrothermal mechanism is provided on the surface of each of the filter chambers. During the working process, it is found that the ambient temperature of the tubular filter body is raised, and after heating to a temperature close to the temperature of the high-temperature high-dust tar-containing gas, the preheating is stopped, and the high-temperature dust-containing tar-containing gas is filtered on the high-temperature dust removing device 30A. Every 5 to 10 minutes, after a round of back-blowing, it can be continuously produced for 15 hours. The pressure difference between the inlet and outlet chambers exceeds 10,000Pa. The backflushing can not achieve the normalization of its filtration capacity. It needs to stop working and enter the regeneration stage. The air blower exceeds the rated current, the production is forced to stop, and then the dust removal equipment is opened for viewing. It is found that there are many pulverized coal scaffoldings between the filter bodies of the dust removal equipment, and the external surface of the filter has a hard shell of about 20 mm, and the hard shell is felt with the fingers. The hard shell contains higher oil content, and the closer to the outer surface of the filter, the higher the oil content. For the filter body with only 480 filter bodies, 5 people are disassembled for the filter body, 68 hours, and the filter body is damaged 112, and the rest is filtered. The body is also washed with a brush, an alkali wash, and an ultrasonic cleaning, which wastes a lot of labor and materials, and the filter body damages 83 pieces, and the cost is quite amazing.

Problem analysis: In this comparative example, only the tubular filter body is heated, but the temperature inside the entire filter chamber is Uneven, and this non-uniformity of temperature will cause the heat card in the cavity to conduct or transfer. In the space where the high temperature and high dust gas enters the space with large temperature change, the pyrophoric oil molecules are more likely to occur in the dust particles. The agglomerated precipitation reaction under the action quickly forms a gray cake which is difficult to solve by backflushing, which causes the dust removal equipment to be stopped, and the switching is frequent and the life is reduced.

Comparative example two:

The difference between the second comparative example and the eighth embodiment lies only in the difference in the preheating mechanism. In this comparative example, the large preheated large air volume gas was not used, but it was preheated by a back blowing mechanism.

During the work, it was found that the backwashing device was used to preheat the dedusting equipment. The preheating time was extremely long, and it could reach 30 to 40 hours, and the temperature only rose to 180 degrees. Even if the backflushing frequency set by the backflushing valve was adjusted, It is difficult to satisfy the heating of the filter chamber by the introduction of high temperature gas from the backflushing mechanism. After heating, back-blowing every 3 minutes, the pressure difference between the inlet and outlet chambers quickly exceeds 11000Pa, the exhaust fan exceeds the rated current, the production is forced to stop, and then the dust removal equipment is opened for inspection, and the filter device of the dust removal device is found. There are many pulverized coal scaffoldings, and there are about 25mm hard shells on the outer surface of the filter. The hard shell contains higher oil content. The closer to the outer surface of the filter, the higher the oil content. The filter body is damaged by 8 pieces, and the other filters pass through the brush. Alkali washing and ultrasonic cleaning waste a lot of labor and materials, and the filter body is damaged by 20 pieces. The cost is quite amazing.

Analysis of the problem: When the back-blowing mechanism preheats the dust removal equipment, the heat conduction path enters the filter mechanism from the air outlet chamber, that is, the filter body. The back-blowing gas has a very weak preheating capacity for the dust removal equipment, and the dust removal equipment is always heated to less than the required temperature, and the tar is precipitated. Relatively serious, the precipitated tar and pulverized coal will quickly form a filter cake, which is thick and dense, leading to the phenomenon of scaffolding.

Embodiment 6

As shown in FIG. 9, the sixth embodiment differs from the fifth embodiment only in that the filter mechanism regeneration device 5 is connected to the air outlet chamber 4, and the rest of the structure is the same as that in the fifth embodiment.

Example 7

As shown in FIG. 10, the difference between the seventh embodiment and the sixth embodiment is only that the preheating device 9 is connected to the air outlet chamber 2, and the air inlet chamber is also connected to the safety gas replacement mechanism 15, and the dust removal device can be disposed by providing the safety gas replacement mechanism 15. The flammable gas inside is replaced, and the safety of the device is increased, and the rest of the structure is the same as that in the fifth embodiment.

Example eight

As shown in FIG. 11 , the difference between the eighth embodiment and the sixth embodiment is that the preheating device 9 and the regenerative mechanism 5 are integrated, that is, the filter cavity can be preheated and regenerated. In addition, the position of the exhaust pipe 7 is adjusted from the side wall of the filter chamber to the filtered gas outlet pipe 12, and the pipe is turned on and off through the valve.

Example nine

As shown in FIG. 12, the difference between the embodiment 9 and the eighth embodiment is only that the device shared by the preheating device 9 and the filter mechanism regenerating device 5 is circulated through the circulation line 21, and the preheated or regenerated gas is from the common pipe. Oxygen-lean gas inlet pipe or also It may be a high-temperature gas input pipe 10, which is shared, enters the intake chamber 3, enters the outlet chamber through the filter mechanism, and returns from the outlet chamber to the preheating device 9 and the filter mechanism regeneration device 5 through the circulation line 21. The shared device forms a circulation line through which excess gas is discharged. In addition, compared with the eighth embodiment, the embodiment 9 removes the back-blowing mechanism, shares the advantages of a circulating pipeline, can greatly reduce the heat loss, and can quickly and uniformly heat and quickly and uniformly regenerate the entire dust removing device by using the circulating air. .

Example ten

As shown in Figure 13:

The tenth embodiment is different from the embodiment nin only in that the connection portion between the device shared by the preheating device 9 and the filter mechanism regenerating device 5 and the intake chamber is transferred from the side wall of the intake cavity to the inlet of the filter gas intake pipe 11. Compared with the embodiment 9, the advantage of the tube is that it is more advantageous for the whole heating of the filter chamber to avoid the excessive temperature of the connection portion with the air inlet chamber, so as to ensure the various parts of the filter chamber after preheating. The temperature is basically uniform and uniform.

Embodiment 11

As shown in Figure 14:

The difference between the eleventh embodiment and the fifth embodiment lies only in the preheating device, that the high temperature gas is not used inside the dust removing device, that is, the high temperature gas preheating mechanism is not used, and the interlayer 19 is disposed by using the filtering cavity, that is, the whole The outer casing is provided in a two-layer structure to form a sandwich space, and a high temperature gas is heated in the interlayer 19. The high-temperature gas flows at high speed in the interlayer, and the inner wall of the dust-removing device is heated. The dust-removing device inside the filter chamber can completely radiate heat inside the device. With a time of 2.5 hours, the temperature of each component in the dust-removing device can be preheated to the basic temperature. Consistent and close to the temperature of the gas to be filtered.

Example twelve

As shown in FIG. 15 , the difference between the eleventh embodiment and the sixth embodiment lies only in the preheating device, and the method of passing the high temperature gas into the interior of the dust removing device is not used, that is, the high temperature gas preheating mechanism is not used, but the filtering cavity is adopted. An electric heating mechanism such as a heating wire 20 is disposed on the inner surface, the outer surface or the casing of the casing, and heat is generated by the electric heating wire 20 to heat the inner wall of the entire dust removing device, and the inner wall of the dust removing device completely surrounds the space inside the filtering chamber, so that it is easy to fully preheat the whole In practice, the preheating time is 2.5 hours, and the temperature of each component in each area of the dust removal equipment can be preheated to be substantially the same. The overall heating of the dust removing device can also be realized, and the heating result can achieve the same temperature of each component in each part of the dust removing device.

Example 13:

As shown in FIG. 16 , the difference between the thirteenth embodiment and the first embodiment is only that the plate filter body 2 is used instead of the plate filter body, and the plate filter body assembly 2 is disposed in the middle of the filter cavity, and the plate filter body combination 2 The circumferential direction and the inner wall of the

dust removing device

30A, 30B are sealed, and the plate filter body assembly 2 divides the space inside the filter cavity into the isolated air inlet chamber 3 and the air outlet chamber 4, and the air inlet surface of the plate filter body assembly 2 is connected to the air inlet chamber 3. The outlet surface is connected to the outlet chamber 4, and the high temperature and high dust contain tar gas from the filter gas. The intake pipe 11 enters the intake chamber 3, passes through the filtration of the plate filter assembly 2, enters the outlet chamber 4, and carries the dust-removed gas from the filtered gas outlet pipe 12 to the next process. Compared with the first embodiment, the combination of the plate filter body can greatly increase the filtration area of the filter body, and greatly increase the filtration amount and filtration efficiency of the filter mechanism.

Embodiment 14

As shown in FIG. 17 , a dust removal system is provided in parallel by two sets of dust removal devices according to the first embodiment. The two sets of dust removal devices share a filter gas intake pipe 11 , and the high temperature oil - containing dust gas enters through the valve. The air chamber 3 passes through the filtration of the plate filter body 2 into the air outlet chamber 4, and then enters the filtered gas outlet pipe 12. A filter mechanism regeneration device 5 is shared, and the filter mechanism regeneration device 5 is connected to the intake chamber 3 through a valve. A preheating device 9 is shared, and one of the dedusting devices 30A is preheated integrally with a preheating device connected to the intake chamber of the dedusting device, and preheated to a temperature close to the temperature of the high temperature and high dust tar-containing gas. 480 ° C; (2) the high temperature high dust tar-containing gas is passed into the preheated first dust removal device 30A, enters from the intake chamber 3, passes through the filter mechanism, enters the outlet chamber 4, and enters the filtered gas outlet tube 12 from the outlet chamber During the filtration process, the backflushing device 8 is implemented by an orderly, sequential, intermittent backflushing control to blow off the floating ash on the surface of the filtering mechanism; (3) after working for a period of time, the filtering capacity of the first dust removing device 30A will be When it is reduced to gradually meet the needs of the filtering work, the other dust removing device 30B is preheated, and when the temperature is close to 480 ° C of the high temperature high dust tar containing gas temperature, the high temperature high dust tar containing gas is introduced into the second dust removing device 30B, The second dust removing device 30B starts to work; (4) stops the high-dust high-dust tar-containing gas from entering the first dust removing device 30A, and then passes the high-temperature safety gas, and replaces the high-temperature high-dust tar-containing gas in the first dust removing device 30A, and sets The gas that has exited enters the filtered gas outlet pipe 12, and after the replacement is completed, the first dust removing device 30A is closed to filter the gas outlet pipe, and the oxygen-removing gas is input to the intake chamber of the first dust removing device through the filtering mechanism regeneration device 5 to perform the first dust removal. The device 30A regenerates; (5) when the filtering capacity of the second dust removing device 30B fails to meet the work requirement, the regenerated first dust removing device 30A switches into the filtering working state, and the second dust removing device 30B stops the filtering work and enters the replacement and regeneration program. (6) The two dust removal devices are alternately switched by "filtering-regeneration" to enable continuous operation of the entire dust removal system.

Example fifteen

As shown in FIG. 18, a dust removal system is provided in parallel by two sets of dust removal devices according to the second embodiment. The two sets of dust removal devices share a filter gas intake pipe 11 and enter the intake cavity 3 through the valve. Filtration of the filter body 2 enters the outlet chamber 4 and enters the filtered gas outlet tube 12. A filter mechanism regeneration device 5 is shared, and the filter mechanism regeneration device 5 is connected to the intake chamber 3 through a valve. A preheating device 9 is shared, and one of the dedusting devices 30A is preheated integrally with a preheating device connected to the outlet chamber 4 of the dedusting device, and preheated to a temperature close to the temperature of the high temperature and high dust tar-containing gas. 435 ° C; (2) the high temperature high dust tar-containing gas is passed into the preheated first dust removal device 30A, enters from the intake chamber 3, passes through the filter mechanism, enters the outlet chamber 4, and enters the filtered gas outlet tube 12 from the outlet chamber In the filtration process, the backflushing device 8 is implemented by orderly, sequential, intermittent backflushing control, blowing off the floating ash on the surface of the filtering mechanism; (3) working for a period of time After that, the filtering capacity of the first dust removing device 30A is reduced to gradually meet the needs of the filtering work, and the other dust removing device 30B is preheated, and when the temperature is close to the high temperature and high dust tar-containing gas temperature of 435 ° C, the high temperature and high dust are included. The tar gas is introduced into the second dust removing device 30B, and the second dust removing device 30B starts to work; (4) stopping the introduction of the high-temperature high-dust tar-containing gas into the first dust removing device 30A, and then introducing the high-temperature safety gas to replace the first dust removing device. The high temperature and high dust in 30A contains tar gas, and the replaced gas enters the filtered gas outlet pipe 12. After the replacement is completed, the first dust removing device 30A is filtered to filter the gas outlet pipe, and the filter mechanism regeneration device 5 is passed to the first dust removing device. The air chamber inputs the oxygen-depleted gas to perform the regeneration of the first dust removing device 30A; (5) when the filtering capacity of the second dust removing device 30B does not meet the working requirements, the first dust removing device 30A after the regeneration switches into the filtering working state, and the second dust removing device The device 30B stops the filtering work and enters the replacement and regeneration process; (6) the two dust removal devices alternately switch through the "filtering-regeneration", so that the entire dust removal system is continuously realized. jobs.

Example sixteen

As shown in FIG. 19, a dust removal system is provided in parallel by two sets of dust removal devices according to the second embodiment. The two sets of dust removal devices share a filter gas intake pipe 11 and enter the intake cavity 3 through the valve. Filtration of the filter body 2 enters the outlet chamber 4 and enters the filtered gas outlet tube 12. A filter mechanism regeneration device 5 is shared, and the filter mechanism regeneration device 5 is connected to the outlet chamber 4 through a valve. A preheating device 9 is shared, and one of the dedusting devices 30A is preheated integrally by using a preheating device connected to the intake chamber 3 of the dedusting device, and preheated to a temperature close to the temperature of the high temperature and high dust tar-containing gas. The temperature is 435 ° C; (2) the high-temperature high-dust tar-containing gas is introduced into the pre-heated first dedusting device 30A, enters from the intake chamber 3, passes through the filtering mechanism, enters the outlet chamber 4, and enters the filtered gas outlet tube from the outlet chamber 12; in the filtering process, the backflushing device 8 is implemented by an orderly, sequential, intermittent backflushing control to blow off the floating ash on the surface of the filtering mechanism; (3) the filtering capacity of the first dust removing device 30A after working for a period of time When it is reduced to gradually meet the needs of the filtering work, the other dust removing device 30B is preheated, and when the temperature is close to the temperature of the high temperature high dust tar-containing gas 435 ° C, the high temperature high dust tar containing gas is introduced into the second dust removing device 30B. The second dust removing device 30B starts to work; (4) stops the introduction of the high-temperature high-dust tar-containing gas into the first dust removing device 30A, and then passes the high-temperature safety gas to replace the high-temperature high-dust tar-containing gas in the first dust removing device 30A. Set The exchanged gas enters the filtered gas outlet pipe 12, and after the replacement is completed, the first dust removing device 30A is filtered to remove the filtered gas outlet pipe, and the filter mechanism regeneration device 5 inputs the lean oxygen gas into the intake chamber of the first dust removing device to perform the first The dust removing device 30A regenerates; (5) when the filtering capacity of the second dust removing device 30B does not meet the working requirements, the regenerated first dust removing device 30A switches into the filtering working state, and the second dust removing device 30B stops the filtering work, and enters the replacement and regeneration. The program; (6) alternately switch between the two sets of dust removal equipment through "filtering-regeneration", so that the entire dust removal system can achieve continuous operation.

The filter mechanism backflushing device 8 disposed in the air outlet chamber 4 can also be adjusted to a physical cleaning mechanism of the filter mechanism, such as a high temperature resistant brush that periodically performs physical contact brushing to remove the surface of the filter mechanism, or the filter mechanism. The mechanism in which the airflow is blown.

Example 17:

As shown in FIG. 20, a dust removal system includes three sets of

dust removing devices

30A, 30B, and 30C arranged in parallel, and a plate filter body 2 is disposed in the

dust removing devices

30A, 30B, and 30C, and the plate filter body 2 is disposed in the dust removing device. In the middle of the container of the

apparatus

30A, 30B, 30C, the circumferential direction of the panel filter body 2 is sealed with the inner walls of the

dust removing devices

30A, 30B, 30C, and the panel filter body 2 divides the space inside the

dust removing devices

30A, 30B, 30C into isolated air intakes. The chamber 3 and the outlet chamber 4, the inlet surface of the plate filter body 2 is connected to the inlet chamber 3, the outlet surface is connected to the outlet chamber 4, and the high temperature and high dust tar-containing gas is introduced into the intake air from the high-temperature high-dust tar-containing gas-containing filter gas inlet pipe 11. The chamber 3, through the filtration of the plate filter 2, enters the outlet chamber 4, and then enters the filtered gas outlet tube 12, and proceeds to the next procedure. The

dust removing device

30A, 30B is provided with a filtering mechanism regeneration device 5 connected to the air outlet chamber 4, and the filtering mechanism regeneration device 5 completes the input of the oxygen-depleted gas when the system needs to be regenerated, including the oxygen-lean gas input pipe 6, the lean The oxygen gas inlet pipe 6 is connected to the intake chamber 3, and an exhaust pipe 7 is provided in the outlet chamber 4. When the filter device 2 of the dust removal device being filtered is clogged, an appropriate amount of oxygen-depleted gas is input through the oxygen-lean gas input pipe 6, so that the oxidizable particles deposited on the surface of the plugged filter 2 are oxidized, and the gas permeability of the filter body is restored. An appropriate amount of oxygen-poor aerobic gas controls the oxidation rate of the oxidizable particles deposited on the surface of the filter body and the temperature at which the dust removing device is regenerated, so that when a set of dust removing device 30A is regenerated, another set of dust removing device 30B passes through the corresponding pipe. The valve switches first to filter coal pyrolysis oil or biomass pyrolysis gas. A filter mechanism backflushing device 8 is disposed in the air outlet chamber 4, and the pre-heating device 9 is disposed on the

dust removing device

30A, 30B. The preheating device 9 is composed of a fuel pipe and a valve, a blower, a duct and a valve, a burner, a combustion chamber and a combustion gas outlet pipe are formed, and the combustion gas outlet pipe is connected to the air inlet chamber 3 of the dust removing device, and the heat generated by the combustion chamber is connected to the air inlet chamber 3 of the dust removing device through the combustion gas outlet pipe, and the heat is continuously sent to the dust removing device. The equipment makes the temperature inside the dust removal equipment reach the temperature of coal pyrolysis oil and gas. The three sets of

dust removing devices

30A, 30B, and 30C are arranged in parallel, and can have the following working forms: 1. The

filtering chambers

30A and 30B are alternately filtered and regenerated, and in the process of interactive filtering and regeneration, the filtering chamber 30C is used as a substitute to solve the problem. When one of the

filter chambers

30A and 30B fails, the filter chamber 30C can be replaced in time without affecting the normal operation of the entire system. 2. When the air volume of the high-temperature high-dust tar-containing gas to be processed by the system is particularly large, or if the progress of filtration needs to be accelerated for various reasons, the dust-removing

equipment

30A, 30B can be simultaneously operated, and the high-temperature high-dust tar-containing gas is performed. The filter chamber 30C is regenerated in the process of working the

dust removing devices

30A, 30B; when the filtering state of the

dust removing devices

30A, 30B is slightly weak, the filter chamber 30C is replaced by the filter chamber 30C, and the filter chambers 30A, 30C are operated. The filter chamber 30B is regenerated; after a period of time, the filter chambers 30B, 30C are operated, and the filter chamber 30A is regenerated, thereby achieving a filtration capacity of about 1.5 to 2 times that of a single filter chamber under continuous uninterrupted operation. .

Example 18

A dust removal system, the number of dust removal devices arranged in parallel is four sets, which are respectively named as dust removal equipment A, dust removal equipment B, dust removal equipment C, and dust removal equipment D. Can have the following working conditions: Dust removal equipment A, B work, dust removal equipment A, B During the working process, the dust removal equipment C and D are regenerated; after that, the dust removal equipment A and B can not meet the filtering requirements slowly, the dust removal equipment C and D work, and the dust removal equipment A and B regenerate. 2. When the high-temperature high-dust tar-containing gas that the system needs to handle is particularly large, or if it is necessary to speed up the filtration process for various reasons, the dust removal equipment A, B, and C can be operated at the same time, and the high-temperature high-dust tar-containing oil The gas is rapidly filtered, the dust removal equipment D is regenerated in the process of the dust removal equipment A, B, C; when the dust removal equipment A, B, C has a weaker filtration capacity, the dust removal equipment D is used instead of the dust removal equipment C, and the dust removal equipment A, B , D work, dust removal equipment C regeneration; after a period of time, dust removal equipment B, C, D work, dust removal equipment A regeneration, and so on. In this way, it is possible to increase the filtration capacity to about 2.5 to 4 times that of a single dust removal device under continuous uninterrupted operation.

Example 19:

As shown in FIG. 21, a dust removal system is provided in parallel with two sets of dust removal devices according to the fifth embodiment. The two dust removal devices share a filter air intake pipe 11, and the gas to be filtered enters the intake cavity through the valve. 3. Filtration through the tubular filter body 2 into the air outlet chamber 4, and then into the filtered gas outlet pipe 12. A filter mechanism regeneration device 5 is shared, and the filter mechanism regeneration device 5 is connected to the outlet chamber 4 through a valve. A preheating device 9 is shared, and one of the dedusting devices 30A is preheated integrally by using a preheating device connected to the intake chamber 3 of the dedusting device, and preheated to a temperature close to the temperature of the high temperature and high dust tar-containing gas. The temperature is 435 ° C; (2) the high-temperature high-dust tar-containing gas is introduced into the pre-heated first dedusting device 30A, enters from the intake chamber 3, passes through the filtering mechanism, enters the outlet chamber 4, and enters the filtered gas outlet tube from the outlet chamber 12; in the filtering process, the backflushing device 8 is implemented by an orderly, sequential, intermittent backflushing control to blow off the floating ash on the surface of the filtering mechanism; (3) the filtering capacity of the first dust removing device 30A after working for a period of time When it is reduced to gradually meet the needs of the filtering work, the other dust removing device 30B is preheated, and when the temperature is close to the temperature of the high temperature high dust tar-containing gas 435 ° C, the high temperature high dust tar containing gas is introduced into the second dust removing device 30B. The second dust removing device 30B starts to work; (4) stops the introduction of the high-temperature high-dust tar-containing gas into the first dust removing device 30A, and then passes the high-temperature safety gas to replace the high-temperature high-dust tar-containing gas in the first dust removing device 30A. Set The exchanged gas enters the filtered gas outlet pipe 12, and after the replacement is completed, the first dust removing device 30A is filtered to remove the filtered gas outlet pipe, and the filter mechanism regeneration device 5 inputs the lean oxygen gas into the intake chamber of the first dust removing device to perform the first The dust removing device 30A regenerates; (5) when the filtering capacity of the second dust removing device 30B does not meet the working requirements, the regenerated first dust removing device 30A switches into the filtering working state, and the second dust removing device 30B stops the filtering work, and enters the replacement and regeneration. The program; (6) alternately switch between the two sets of dust removal equipment through "filtering-regeneration", so that the entire dust removal system can achieve continuous operation.

Example twenty

As shown in FIG. 22, compared with the seventeenth embodiment, the difference between the two is that the preheating device 9 and the filtering mechanism regeneration device 5 share a set of devices, share an input pipe 10, and are used by a combination of valves. It can reduce the investment and management of equipment and pipelines, and at the same time realize the corresponding functions and achieve more obvious economic benefits. The preheating device 9 is connected to the high temperature gas of the dust removing device at 550 ° C to heat the whole filter cavity, and the temperature and the high temperature and high dust containing tar gas in the dust removing device After the temperature is close to the temperature, the preheating is stopped, and the preheating time is about 3 hours. The high temperature dust and tar-containing gas is filtered on the high temperature dust removing device 30A, and the pressure difference between the outlet chamber and the inlet chamber of the dust removing device is controlled to 1000 to 8500 Pa per hour. Filter 1400 standard pyrolysis gas, and continuously produce 280 to 300 hours at a time for 5 to 7 minutes. At the same time, after the switching, the dust removing device that has stopped filtering can be put into the regeneration process, and the filtering mechanism regeneration device 5 inputs the regeneration gas through the input pipe 10, and the regenerated exhaust gas is discharged from the exhaust pipe 7. The regeneration task was completed in 26 hours. After the regeneration, the surface of the filter body was only oxidized floating ash which was less than 0.03 mm thick, and the tubular filter body or the filter body was not damaged. When the backflushing has gradually failed to normalize its filtering ability, the work is stopped, and the regeneration phase is entered, the filtering task is switched to the second dust removing device 30B, and the second dust removing device 30B is responsible for the filtering task.

Example 21:

As shown in Figure 23:

Compared with the seventeenth embodiment, each of the dust removing devices is provided with 560 tubular filter bodies, and the partition plate is provided with 560 holes. The preheating device and the filter body regenerating device are truly combined and share a set of devices, that is, The combustion chamber of the preheating device 9 is also a plenum chamber of the regeneration device 5, and the high temperature gas input pipe 10 of the preheating device 9 is shared with the oxygen-depleted gas input pipe 6 of the regeneration device, the circulation line 21 is shared, and the circulation fan is shared, and the blower is shared. Share. When the dust removing device is preheated, the combustion system is first ignited, and the dust removing device that needs to be connected to the filtering system is preheated, and the combustion gas outlet pipe is connected with the air inlet chamber 3 of the dust removing device, and the heat generated by the combustion chamber passes through the combustion gas outlet pipe. It is connected with the air inlet chamber 3 of the dust removing device, and the heat is continuously sent to the dust removing device, so that the temperature in the dust removing device reaches the temperature of the pyrolysis oil and gas. The circulating fan is re-opened, and excess gas is discharged from the exhaust pipe 7 on the circulation line. The effect of this combination reduces various supporting devices and pipelines, and the use of various valves makes the entire system simpler and more reliable. The second is to use part of the heat energy of the circulating gas to improve the thermal energy utilization rate of the system. The third is to reduce the heat concentration, so that the overall temperature in the dust removing device is uniform; when the dust removing device is regenerated, the circulating fan is first opened, and then the blower fan is opened, and the excess gas is discharged from the exhaust pipe 7 on the circulating pipe 21. The beneficial effect of the circulation pipeline is obvious. The high-volume and low-oxygen regeneration gas makes the regeneration temperature of the dust removal equipment easy to control, and the regeneration process of a large number of filter bodies is consistent, the progress is uniform, and the regeneration effect is better.

The purpose of regeneration is that the filter body of the dust removal device being filtered has been blocked, and it is necessary to provide an appropriate amount of oxygen-depleted gas to the dust removal device, so that the oxidizable particles deposited on the surface of the blocked filter body are oxidized, and the filter body is restored. Breathability, an appropriate amount of oxygen-depleted gas controls the oxidation rate of the oxidizable particles deposited on the surface of the filter body and the temperature at which the dust removal device is regenerated. The air intake chamber of each dust removal device has a device for supplying safety gas, which is used to replace the filter gas of the dust removal device before the regeneration of the dust removal device, that is, the high temperature and high dust containing tar gas, so that the dust removal device is safer and more reliable during regeneration. The safety gas device is composed of a safety gas inlet pipe and an inlet valve, and the safety gas inlet pipe is connected to the air inlet of the dust removal device.

The gas used in the backflushing system of the dust removal equipment is a safe gas, or a gas that is not oxidizing. The temperature of the back blowing gas is consistent with the temperature of the coal pyrolysis gas entering the dust removing device, and the temperature difference is less than 15 ° C. This temperature requirement can avoid coal heat. Degassing tar Precipitation or lysis. The preheating device is composed of a fuel pipe and a valve, a blower, a duct and a valve, a burner, a combustion chamber and a combustion gas outlet pipe, and the combustion gas outlet pipe is connected with the air inlet of the dust removing device, and the heat is continuously sent to the dust removing device. So that the temperature inside the dust removal equipment reaches the temperature of coal pyrolysis oil and gas.

a combustion gas outlet pipe of the preheating device is connected to a pipe connected to the air inlet of the dust removing device, and a discharge pipe is connected to the pipe connecting the combustion gas outlet pipe of the preheating device and the air inlet of the dust removing device. Valves are installed, when the preheating device starts to ignite, the valve on the combustion gas outlet pipe of the preheating device is closed, the discharge valve is opened, the unstable combustion gas is discharged from the exhaust pipe, and when the combustion is stable, the discharge valve is closed. The valve on the combustion gas outlet pipe of the preheating device is opened, and the combustion gas enters the dust removing device. The regeneration device of the dust removal device is composed of a circulation pipe, a circulation fan, a blower plenum, and a condensing pipe, and the condensing pipe is connected with an air inlet of the dust removing device, and the circulating pipe is connected with an outlet pipe of the dust removing device, and The circulation pipe is connected between the air outlet chamber and the outlet valve of the dust removing device, and the valve is installed on the steam collecting pipe. The valve of the exhaust pipe is closed by opening the outlet valve of the dust removing device, and the frequency of the circulating fan and the blower is adjusted to adjust The combination of circulating air volume, air volume, oxygen content, high air volume and low oxygen content can control the oxidation rate of the oxidizable particles deposited on the external surface of the dust removal device and the temperature during the regeneration of the dust removal equipment, and can also be used for the dust removal equipment. A large number of sets of filters are uniformly regenerated inside. The circulation pipeline is further provided with a discharge pipe and a discharge valve, and a check valve is arranged at the top of the exhaust pipe, the gas is only discharged, and the excess gas is discharged from the discharge check valve.

The high-temperature dust-removing tar-containing gas is filtered on the high-temperature dust removing device 30A, and the pressure difference between the air outlet chamber and the air inlet chamber of the dust removing device is controlled to 1000-8300 Pa, and 3000 standard square pyrolysis gas is filtered every hour, and a round blow is performed every 5 to 7 minutes. In the case of 280-290 hours of continuous production, the original dust-removing equipment enters the regeneration process and completes the regeneration task in 30 hours. After the regeneration, the surface of the filter body is only oxidized floating ash of less than 0.02 mm thick, and the tubular filter body Or the filter body is not damaged.

Example 22:

As shown in FIG. 24, a dust removal system includes two sets of

dust removing devices

30A, 30B arranged in parallel, in which the plate type filter body combination 2 is disposed, and the plate type filter body assembly 2 is disposed in the dust removing device 30A. In the middle of the container of 30B, the circumferential direction of the panel filter body assembly 2 is sealed with the inner walls of the

dust removing devices

30A, 30B, and the panel filter body assembly 2 divides the space inside the

dust removing devices

30A, 30B into the isolated air inlet chamber 3 and the air outlet chamber 4 The inlet surface of the plate filter body assembly 2 is connected to the intake chamber 3, and the outlet surface is connected to the outlet chamber 4. The high temperature and high dust tar-containing gas enters the intake chamber 3 from the filter gas intake pipe 11 and passes through the filtration of the plate filter assembly 2 The air chamber 4 is exhausted, and the dust-removed gas is taken from the filtered gas outlet pipe 12 to the next process. Compared with the first embodiment, the combination of the plate filter body can greatly increase the filtration area of the filter body, and greatly increase the filtration amount and filtration efficiency of the filter mechanism.

The

dust removing device

30A, 30B is provided with a filtering mechanism regeneration device 5 connected to the intake chamber 3, and the filtering mechanism regeneration device 5 completes the input of the oxygen-depleted gas when the system needs to be regenerated, including the oxygen-lean gas input pipe 6, Oxygen-depleted gas The input pipe 6 is connected to the intake chamber 3, and an exhaust pipe 7 is provided in the intake chamber 3. When the filter device 2 of the dust removal device being filtered is clogged, an appropriate amount of oxygen-depleted gas is input through the oxygen-lean gas input pipe 6, so that the oxidizable particles deposited on the surface of the plugged filter 2 are oxidized, and the gas permeability of the filter body is restored. An appropriate amount of oxygen-depleted gas is used to control the oxidation rate of the oxidizable particles deposited on the surface of the filter body and the temperature at which the dust removing device is regenerated, so that when a set of dust removing device 30A is regenerated, another set of dust removing device 30B passes through the corresponding pipe. Valve switching, filtering coal pyrolysis oil or biomass pyrolysis gas. A filter mechanism backflushing device 8 is disposed in the air outlet chamber 4, and the pre-heating device 9 is disposed on the

dust removing device

30A, 30B. The preheating device 9 is composed of a fuel pipe and a valve, a blower, a duct and a valve, a burner, a combustor and a combustion gas outlet pipe are formed, and the combustion gas outlet pipe is connected to the air inlet chamber 3 of the dust removing device through a temperature control mechanism, and the heat generated by the combustion chamber is connected to the air inlet chamber 3 of the dust removing device through the combustion gas outlet pipe, and the heat is continuously The ground is sent to the dust removal equipment so that the temperature of the dust removal equipment reaches the temperature of the coal pyrolysis oil and gas. The air inlet chamber and the air outlet chamber of the dust removing device are provided with a temperature measuring device and a pressure measuring device for controlling the temperature and pressure of the preheating and regeneration process of the dust removing device. The outer side or/and the inner side of the outer casing of the dust removing device are wrapped with a heat insulating material to facilitate the heat preservation of the casing, and the coal pyrolysis oil and gas is not easy to precipitate tar on the casing. The purpose of preheating the dust removal equipment is to heat the cold dust removal equipment to the same temperature as the coal pyrolysis oil. The tar in the coal pyrolysis oil and gas will not be precipitated in the dust removal equipment, and the tar will not be formed into coal. The combination of dust and dust quickly blocks the filter. After the pre-heating of the dust-removing equipment, the unfiltered pyrolysis oil and gas can be directly filtered into the dust-removing equipment through the switching of the valves on the corresponding pipelines. Preheating is the work done in the dust removal equipment in the cold state. If you have not participated in the filtration of the dust removal equipment, or the production stoppage time is long, the temperature and the temperature of the gas to be filtered differ greatly. It is necessary to preheat the cold dust removal equipment, and then switch to the filtration system after the preheating is completed.

The high-temperature dust-removing tar-containing gas is filtered on the high-temperature dust removing device 30A, and the pressure difference between the air outlet chamber and the air inlet chamber of the dust removing device is controlled to 5000-6000 Pa, and the 2000 standard pyrolysis gas is filtered every hour, and the blow-back gas is blown every 15 to 20 minutes. In the case, it can be continuously produced for 150 to 200 hours. After switching, the original dust removal equipment enters the regeneration process and completes the regeneration task in 17 hours. After regeneration, the surface of the filter body is only 0.22 mm thick oxidized floating ash, and the plate filter body does not. Damaged part.

Example twenty-three:

As shown in FIG. 25, a dust removal system includes two sets of

dust removing devices

30A and 30B arranged in parallel, and the

dust removing devices

30A and 30B are integrally arranged, and two chambers share one cavity during the process of constructing the system. The side of the body reduces the manufacturing cost of the side of a cavity and helps reduce the loss of heat throughout the system.

Example twenty-four:

As shown in FIG. 26, a dust removal system includes two sets of

dust removing devices

30A and 30B arranged in parallel, and the

dust removing devices

30A and 30B are integrally disposed and share a single dust discharging mechanism. This device is also within the range in which the

dust removing devices

30A, 30B are connected in parallel, and the two can be integrated with respect to the twenty-second embodiment, thereby saving space.

The back-blowing mechanism in the

dust removing device

30A, 30B can also be adjusted to a physical cleaning mechanism of the filtering mechanism, such as a high temperature resistant brush that periodically performs physical contact brushing to remove the surface of the filtering mechanism, or a gas jet to the filtering mechanism. Blowing the body.

Example twenty-fifth:

As shown in FIG. 27, a dust removal system includes three sets of

dust removing devices

30A, 30B, and 30C arranged in parallel, and the preheating device 9 of the three devices and the filtering mechanism regeneration device 5 share a set of devices, that is, in the dotted line in the figure. In part, the preheated or regenerated gas can be passed through the circulation line 21 from the common pipeline oxygen-lean gas inlet pipe 6 or also the high-temperature gas inlet pipe (the two pipes are common) into the intake cavity 3, through the filtering mechanism After entering the air outlet chamber, from the air outlet chamber through the circulation line 21 to the device shared by the preheating device 9 and the filter mechanism regeneration device 5, a circulation line is formed, and excess gas is discharged through the exhaust pipe 7.

Actually, it is also possible to reverse the cycle, that is, the preheating device 9 of the three devices and the filter mechanism regenerating device 5 share a set of devices, that is, a portion in the dotted line in the figure, through which the preheated or regenerated gas can be circulated through the circulation line 21. The pipeline 21 enters the outlet chamber 4, enters the intake chamber 3 through the filter mechanism, and returns to the device shared by the preheating device 9 and the filter mechanism regeneration device 5 from the common pipe oxygen-lean gas inlet pipe 6 or also the high-temperature gas input pipe. A circulation line is formed, and excess gas is discharged through the exhaust pipe 7. That is, through the circulation line 21, it is possible to conveniently preheat the entire filtration chamber as a whole, or to regenerate the dedusting equipment to be regenerated with an atmospheric oxygen-poor gas during the regeneration process.

Example twenty-six:

As shown in Fig. 28, compared with the twenty-first embodiment, the twenty-sixth embodiment of the device common to the preheating device 9 and the filter mechanism regenerating device 5 and the inlet of the filter chamber are transferred from the side wall of the intake chamber to the filter. On the gas inlet pipe 11, the connection portion of the circulation pipe 21 and the outlet chamber is also transferred from the side wall of the outlet chamber to the filter gas outlet pipe 12, and the change of the inlet and outlet positions of the circulation pipe is more advantageous for the filter chamber of the preheating device 9 The overall heating is performed to avoid the phenomenon that the temperature between the valve of the filter gas inlet pipe 11 and the inlet chamber is lowered after the high temperature gas is not introduced for a long time, which is beneficial to improve the overall preheating effect in the process of preheating.

Example twenty-seven:

As shown in FIG. 29, in the twenty-seventh embodiment, compared with the twenty-sixth embodiment, the pipe connected to the entire filter chamber by the device shared by the preheating device 9 and the filter mechanism regenerating device 5 is added, that is, the preheating device 9 and The device shared by the filter mechanism regeneration device 5 not only has a pipe connection to the intake chamber 3, but also has a pipe connection to the outlet chamber 4, which facilitates rapid preheating and regeneration, reduces preheating and regeneration time, and is particularly advantageous for improving preheating and Reproductive work efficiency.

The terms in the specification are explained as follows:

“Atmospheric amount” refers especially to the amount of air passing through more than 50 cubic meters per minute under normal pressure;

"Oxygen-poor gas" especially refers to a gas having an oxygen content of 0.1 to 5%;

The high temperature gas containing dust and tar and the "high temperature" in the filter chamber means, in particular, 250 to 750 °C.

"High dust" especially means that the dust content in the gas is 100-2000 g/m3.

"High tar content" means that the tar content in the gas is from 100 to 3000 g/m 3 .

As is generally understood by those skilled in the art, "safe gas" refers in particular to gases that are not oxidizing, such as inert gases, nitrogen, water vapor, and the like.

As is generally understood by those skilled in the art, the "inlet surface" is the surface of the filter mechanism that enters the gas to be filtered, such as the outer surface of the tubular dust removing device, the inlet side surface of the plate filter body;

The "outlet surface" is the surface of the filtering mechanism on which the filtered gas is discharged, such as the inner surface of the tubular dust removing device, and the outlet side surface of the plate filter body.

"Parallel", in this paper, the inlet chamber of two or more dust removal devices is connected to the filter gas inlet pipe, and the outlet chamber is connected with the filter gas outlet pipe. Two or more dedusting devices do not interfere with each other, and can be used simultaneously or separately, such as the parallel concept in lighting circuits.

In parallel, two or more dust removal devices may be connected in parallel between the filter gas inlet pipe and the filter gas outlet pipe, or may be connected in parallel between the pyrolysis device and the post-treatment device to realize the filtration gas. Dust filtration.

The two or more dust removal devices that are "parallel" as described herein may be identical, such as two dust removal devices in parallel, which are the dust removal devices described in Embodiment 7. The dust removing device described in the first embodiment may be different, and the other one connected in parallel with the dust removing device described in the third embodiment. It is even possible to have a dust removal device for the plate filter structure and a dust removal device for the separator and the tubular filter structure.

As is generally understood by those skilled in the art, "high temperature and high pressure gas" for backflushing means, in particular, the ability to effectively blow back the filter-reducing substance attached to the tubular filter mechanism without causing a significant decrease in the temperature of the filter mechanism. gas.

Claims

A dust removing device comprising a filtering chamber, a filtering mechanism regeneration device and a preheating device; wherein:

A filter mechanism is disposed in the filter cavity, and the filter mechanism defines an isolated air inlet chamber and an air outlet chamber in an inner space of the filter chamber, the air inlet chamber is connected to the filter air intake tube, and the air outlet chamber is Filter gas outlet pipe connection;

The filter chamber is provided with a dust discharge mechanism;

The preheating device preheats the filter chamber as a whole.
A dust removing apparatus according to claim 1, wherein said filtering mechanism is a plate type filter body or a plate type filter body combination.
A dust removing apparatus according to claim 1 or 2, wherein said filtering mechanism comprises a partition disposed in a casing of the filtering chamber, said partition defining an air inlet chamber in an inner space of the filtering chamber An air outlet chamber, wherein the partition plate is provided with a plurality of tubular filter bodies, and the filter body is fixed on the partition plate through a hole provided in the partition plate, and an inner surface of the tubular filter body is connected to the air outlet chamber, and the outer surface is Connected to the intake chamber.
The dust removing device according to any one of the preceding claims, wherein the plurality of tubular filter bodies on the partition plate are divided into several groups, and each set of tubular filter bodies is correspondingly provided with a set of filter mechanism backflushing devices. .
A dust removing apparatus according to any one of the preceding claims, wherein the filter mechanism backflushing device comprises a backflushing venturi and a backflushing nozzle disposed in the air outlet chamber, the back blowing The large end of the tube is connected to the surface of the partition facing the air outlet, and the outlet end of each set of tubular filter body is correspondingly facing the large end of the back-flushing venturi, and one end of the back-blowing nozzle is facing a small mouth end of the back-flush venturi or extending into the small mouth end of the back-flush venturi, the other end of the back-blowing nozzle extending out of the housing of the filter chamber and via an electromagnetic backflush valve Connected to a high temperature and high pressure gas generating device.
The dust removing device according to any of the preceding claims, wherein the preheating device is gas-connected to the intake chamber and/or the outlet chamber.
The dust removing apparatus according to any one of the preceding claims, wherein the preheating device comprises a high temperature gas generating mechanism, a valve, and a high temperature gas input pipe connected to the intake chamber and/or the outlet chamber; The gas inlet pipe is connected to the high temperature gas generating mechanism through a valve, and the filter chamber is provided with an exhaust pipe.
A dust removal device according to any of the preceding claims, wherein the intake and/or outlet chambers are connected to the filter mechanism regeneration device.
A dust removing apparatus according to any one of the preceding claims, wherein the filter mechanism regeneration device comprises a regenerative substance input pipe connected to the intake chamber and/or the outlet chamber.
A dust removing apparatus according to any one of the preceding claims, wherein the filter chamber is provided with a safety gas replacement mechanism.
A dust removing apparatus according to any one of the preceding claims, wherein the regeneration device and the preheating device share a set of devices.
The dust removing apparatus according to any one of the preceding claims, wherein the regeneration device and the preheating device are connected to the intake chamber, and the outlet chamber passes through a circulation line and the regeneration device, and is preheated. Device connection.
A dust removal system, characterized in that the dust removal system is connected in parallel by two or more sets of dust removal devices according to any one of claims 1-12.
A dust removal system according to claim 13, wherein said two or more sets of dust removing devices are integrally provided.
A dust removing method for operating a dust removing system according to claim 13 or 14, comprising the steps of:

(1) using one of the preheating devices connected to the dust removing device, preheating one of the dust removing devices (the first dust removing device), and preheating to a temperature close to the temperature of the high temperature high dust tar containing gas;

(2) Passing the high-temperature high-dust tar-containing gas through the filter gas inlet pipe into the pre-heated first dust-removing device, and the high-temperature high-dust tar-containing gas enters from the intake chamber, passes through the filtering mechanism, enters the outlet chamber, and enters from the outlet chamber. Filtering the gas outlet pipe; during the filtering process, the backflushing device blows off the floating ash on the surface of the filtering mechanism;

(3) After working for a period of time, the filtering capacity of the first dedusting equipment will be reduced to gradually meet the needs of the filtering work, and the other dedusting equipment (second dedusting equipment) is preheated by the preheating device, and the preheating is high to the high temperature. When the temperature of the dust-containing tar gas is close, the high-temperature high-dust tar-containing gas is introduced into the second dust-removing device, and the second dust-removing device starts to work;

Stop the high-dust and high-dust tar-containing gas from the first dust-removing device, and then replace the high-temperature high-dust tar-containing gas in the first dust-removing device through the high-pressure safety gas through the safety gas replacement mechanism. After the replacement, the first dust-removing device is turned off. Filtering the gas outlet valve, and inputting the oxygen-depleted gas to the intake chamber and/or the outlet chamber of the first dust removal device through the filter mechanism regeneration device to perform regeneration of the first dust removal device;

(5) When the filtering capacity of the second dust removing device cannot meet the work requirement, the first dust removing device after the regeneration switches into the filtering working state, and the second dust removing device stops the filtering work and enters the replacement and regeneration process;

(6) Two or more sets of dust removal equipment are alternately switched by "filtering-regeneration" to enable continuous operation of the entire dust removal system.