CN209885498U - Zero-emission dry separation system - Google Patents

Abstract

The utility model provides a zero release dry separation system, the wet and hot gas that contains the dust after its dry separation that will dry separation system produce carries out the closed loop dust removal dehumidification purification treatment of a series of dust removals, purification, dehumidification, and the dust removal dehumidification purifies for clean gaseous back, and the dry separation system is given in reverse supply, and then realizes the zero pollutant discharge to the environment, and whole zero release dry separation system constitutes a closed circulation system from the circulation. The zero-emission dry separation system enables the working gas to be kept warm in the closed cycle, greatly improves the working efficiency of gas purification, has no heat loss in the closed cycle, further improves the temperature of the gas flow, and further reduces the production cost. The gas is completely recycled in the self-circulation system, the damage to the environment is reduced to the minimum, and the technical effect of almost zero pollution emission is achieved.

Description

Zero-emission dry separation system

Technical Field

The utility model belongs to the technical field of coal dry separation equipment, concretely relates to zero release dry separation system.

Background

Coal is a main energy source in China, reaches more than 60% in the production and consumption structure of primary energy, and has an important supporting function on the high-speed development of economy in China. At present, most raw coal in China is directly combusted without being subjected to clean separation processing, so that very serious environmental pollution and resource waste are caused. Coal dressing is the basis of clean utilization technology of coal and is one of key technologies for realizing energy conservation and emission reduction. For a long time, the theory and the method of coal wet separation are the foundation of the development of the leading coal separation technology, but the coal recoverable reserves of China are more than 2/3 distributed in arid water-deficient areas such as northwest, the traditional wet separation method with large water consumption is difficult to adopt, the clean utilization of coal separation is restricted, and the research on the key technology of high-efficiency dry coal separation is urgent.

The coal dry separation process is widely applied to the coal upgrading industry at present, resources can be fully utilized, the coal quality and the coal utilization rate can be improved, the environment pollution caused by raw coal utilization is reduced, the coal transportation cost is reduced, and the purposes of energy conservation and emission reduction are achieved. However, the coal dry separation process inevitably uses wind power to separate coal, and in the implementation process, the coal dry separation process inevitably discharges mixed gas flow or waste gas flow mixed with dust or coal particles into the atmosphere, so that certain influence on the surrounding environment is caused.

With the requirement on environmental cleanness, how to solve the problem of pollution reduction of the coal dry separation process inevitably comes to the counter of research developers. At present, the technology capable of thoroughly treating the mixed gas flow or the waste gas flow discharged into the atmosphere only adds complex systems or technologies such as dust removal and the like after the coal preparation process, but the complex dust removal process operates as an independent system, and the operation not only needs to consume energy, but also inevitably needs to increase the great production cost and also needs to increase the occupied production space or area. Therefore, thoroughly solving the problem of pollution reduction in the coal dry separation process is always an urgent problem to be solved by coal developers.

SUMMERY OF THE UTILITY MODEL

In order to solve the above defects, the applicant provides a zero-emission dry separation system through many designs and researches, which can reduce the pollution to the air to the maximum extent and reduce the energy consumption, and the air forms a closed circulation system, thereby further improving the dry separation efficiency and reducing the energy consumption ratio.

According to the technical scheme of the utility model, a zero release dry separation system is provided, its wet hot gas that contains the dust after the dry separation that will dry separation system produced carries out the closed loop dust removal dehumidification purification treatment of a series of dust removals, purification, dehumidification, and the dry separation system is supplied with in reverse after the purification of dust removal dehumidification is clean gas, and then realizes the zero pollutant discharge to the environment, and whole zero release dry separation system constitutes a closed circulation system of self-loopa.

Wherein, the self-circulating closed-loop circulating system realizes automatic flow by utilizing the air flow pressure difference and the temperature difference in the closed system; or in order to further enhance the power of the gas flow of the self-circulating closed-loop circulating system, an induced draft fan is arranged for increasing the gas flow rate of the gas in the self-circulating closed-loop circulating system.

Furthermore, the zero-emission dry separation system comprises a main machine closing body, a gravity settling dust collector, a bag-type dust collector and a condensed water collector, wherein the main machine closing body is used for closing the dry separation system in a closed space, the gravity settling dust collector is used for removing and filtering large-particle impurities, the bag-type dust collector is used for filtering dust with smaller particle size, and the condensed water collector is used for reducing moisture in wet airflow; the main machine closing body, the gravity settling dust collector, the bag-type dust collector and the condensed water collector are connected in sequence. According to the field production requirement, a clean air pipeline, an automatic opening and closing valve, an exhaust diffuser, an inertial filter or a sensor can be optionally added.

Furthermore, the zero-emission dry separation system comprises a main machine closed body 1, an air return pipeline 2, a gravity settling dust collector 3, a bag-type dust collector 4, a dust collector induced draft fan 5, a condensed water collector 6, a No. 1 clean air pipeline 7, a No. 2 clean air pipeline 8, an automatic start-stop valve 9, an emission diffuser 10, an inertial filter 11 and a dust removal pipeline 13; the main machine closing body 1 is connected with an inlet of the gravity settling dust collector 3 through a dust removing pipeline 13, a first air outlet 305 of the gravity settling dust collector 3 is connected with an air inlet of a bag-type dust collector 4 arranged at the middle lower part of the bag-type dust collector 4, an air outlet of the bag-type dust collector 4 arranged at the upper part of the bag-type dust collector 4 is connected with an induced air pipeline opening of a dust collector induced draft fan 5 through a No. 1 clean air pipeline 7, an air outlet of the dust collector induced draft fan 5 is connected with a second air inlet 601 of a condensed water collector, and hot gas after being dehumidified and dehydrated by the condensed water collector 6 sequentially passes through a No. 2 clean air pipeline 8 and an inertial filter 11 and then enters the.

Preferably, a sensor 12 for dust concentration and gas pressure is arranged between the inertial filter 11 and the return air duct 2, which sensor 12 is in linkage with the automatic shut-off valve 9 and the precipitator fan 5.

More preferably, only when the dust concentration of the gas is detected to meet the environmental protection requirement and the air pressure in the main machine closed body is greater than the safe pressure of the circulating operation, the automatic closing and opening valve 9 is automatically opened, and the clean and environmental-friendly gas is discharged to the external environment through the discharge diffuser.

More preferably, when the dust concentration of the gas does not meet the environmental protection requirement, the working air pressure of the induced draft fan 5 of the dust remover is increased, the flow speed and the flow rate of the gas in the closed circulating body are increased, and then the reciprocating times and the filtration times of each dust remover are increased.

The utility model discloses a zero release dry separation system compares with prior art, the utility model discloses a have following advantage:

1. the utility model discloses form a whole set of closed circulation system, make working gas continuously do work in closed circulation and obtain the heat and keep warm.

2. The linkage of multistage clarification plant has greatly promoted gas purification's work efficiency to the generation cost has been reduced.

3. Because the working gas keeps a certain temperature in the closed cycle, the working gas has no heat loss in the closed cycle, and simultaneously generates certain heat due to gas pressure difference and dust particle friction collision in the dust removal and filtration processes, so that the temperature of the gas flow is increased, a certain prerequisite basis is provided for subsequent dehumidification and moisture removal, and the production cost is further reduced.

4. The gas is completely recycled in the self-circulation system, and the technical effect of zero pollution emission is achieved.

5. The method realizes the organic combination of the environmental protection dust removal and the coal dry separation process, not only reduces the production cost, but also greatly reduces the occupied area of a production area, and belongs to one-time historical innovation of the coal dry separation process.

6. After the technology is modularized, the technology is applied to the underground environment, and the production cost is greatly reduced.

Drawings

Fig. 1 is a schematic structural view of a zero-emission dry separation system according to the present invention;

FIG. 2 is a schematic diagram of the operating principle of the gravity settler shown in FIG. 1;

FIG. 3 is a schematic structural view of the condensate collector shown in FIG. 1;

FIG. 4 is a schematic diagram of the inertial filter of FIG. 1 in terms of its operation and construction;

FIG. 5 is a schematic diagram of a modification of the system of FIG. 1;

figure 6 is a schematic diagram of a modification to the gravity settler shown in figure 2.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Additionally, the scope of the present invention should not be limited to the particular structures or components described below or to the particular parameters.

The utility model provides a zero release dry separation system and dry separation technology, its wet hot gas that contains the dust after the dry separation that will dry separation system produce carries out closed loop processing such as a series of dust removals, purification, dehumidification, and dust removal purification is clean gaseous after, and reverse supply gives the dry separation system, and then realizes the zero pollutant discharge to the environment. After the system is miniaturized, the system can be applied to the underground environment, and firstly, the damage to the working environment is reduced to zero because almost no polluted gas is discharged into the working environment; and secondly, the coal gangue is directly backfilled in the hollowed area, so that the transportation cost of the coal gangue and the cost of backfilling the hollowed area are reduced.

The utility model discloses a zero release dry separation system mainly includes host computer closing body, gravity subside dust remover, sack cleaner and condensate water collector, wherein the host computer closing body is used for sealing the dry separation system in an airtight space, the gravity subsides the filter and is used for cleaing away the filtration with large granule impurity, the sack cleaner is used for filtering the dust of less granularity, the condensate water collector is used for reducing the moisture in the humid air stream; the main machine closing body, the gravity settling dust collector, the bag-type dust collector and the condensed water collector are connected in sequence. It is emphasized that the gravity settling dust remover, the bag-type dust remover and the condensed water collector are sequentially connected, and when the air flow sequentially passes through the gravity settling dust remover and the bag-type dust remover, a certain temperature rise is generated, and the temperature rise generated in the treatment of the former device is used as the basis of the subsequent treatment; namely, the temperature rise of the dust airflow generated by particle collision in the gravity settling dust collector is beneficial to the treatment effect of the dust airflow in the bag-type dust collector, namely, the maximum treatment of the dust airflow in the bag-type dust collector is ensured, and almost all dust is absorbed and collected in the bag-type dust collector; the temperature of the dust airflow is raised in the bag-type dust collector, which is beneficial to the vaporization and condensation of the semi-clean airflow in the condensed water collector. Further, according to the field production needs, a clean air pipeline, an automatic opening and closing valve, an exhaust diffuser, an inertial filter or a sensor can be optionally added. The self-circulation closed circulation system realizes automatic flow by utilizing the air flow pressure difference and the temperature difference in the closed system; in order to further enhance the working power, a dust remover induced draft fan can be arranged, so that the flow of gas in the closed circulating body can be increased conveniently.

In more detail, the zero-emission dry separation system shown in fig. 1 includes a main machine enclosure 1, a return air duct 2, a gravity settling dust collector 3, a bag-type dust collector 4, a dust collector induced draft fan 5, a condensed water collector 6, a 1# clean air duct 7, a 2# clean air duct 8, an automatic on-off valve 9, an exhaust diffuser 10, an inertial filter 11, a sensor 12 and a dust removal duct 13. The main machine closing body 1 is connected with the inlet of the gravity settling dust remover 3 through a dust removing pipeline 13; optionally, the dust removal pipeline 13 is directly connected with a dust gas outlet of the dry separation system, and a monitoring sensing system is arranged at the connection position of the dust removal pipeline 13 and the dust gas outlet of the dry separation system to monitor dust concentration, gas pressure or/and gas pressure and gas flow rate, so as to regulate and control the circulation speed and purification power of the zero-emission dry separation system in a real-time remote or short-range manner; or the dust removal pipeline 13 is only connected with the main machine enclosure 1, at the moment, the dry separation system forms a production area of a closed space in the main machine enclosure 1, and at the moment, a dust monitoring system is arranged in the production area to remotely and closely regulate and control the circulation speed and the purification power of the zero-emission dry separation system in real time. The first air outlet 305 of the gravity settling dust collector 3 is connected with an air inlet of a bag-type dust collector 4 arranged at the middle lower part of the bag-type dust collector 4, an air outlet of the bag-type dust collector 4 arranged at the upper part of the bag-type dust collector 4 is connected with an induced air duct opening of a dust collector induced draft fan 5 through a No. 1 clean air duct 7, an air outlet of the dust collector induced draft fan 5 is connected with a second air inlet 601 of a condensed water collector, and hot gas after being dehumidified and dehumidified by the condensed water collector 6 sequentially passes through a No. 2 clean air duct 8 and an inertial filter 11 and then enters a dry separation host closed body through. Alternatively, the clean air stream may be directed into the main enclosure where the air inlet system of the dry separation system operates independently to provide the desired inlet air temperature, velocity and pressure for the dry separation system. Alternatively, the return air duct 2 is directly connected to the air inlet system of the dry separation system through the main dry separation machine enclosure, and optionally an air flow pressurizing and/or heating device is arranged in the closed main body at the connection position of the return air duct 2 and the air inlet system of the dry separation system to generate the air flow required by the dry separation system. A sensor 12 for dust concentration and gas pressure is arranged between the inertial filter 11 and the return air duct 2, and the sensor 12 is linked with the automatic closing and opening valve 9 and the dust remover induced draft fan 5. Only when detecting that the dust concentration of gas satisfies the environmental protection requirement and the atmospheric pressure in the host computer obturator is greater than the safe pressure of circulation operation, automatic close-open valve 9 is automatic to be opened, discharges clean environmental protection's gas to external environment through discharging the diffuser. When the dust concentration of the gas does not meet the environment protection, the working pressure of the induced draft fan 5 of the dust remover is increased, the flow of the gas in the closed circulating body is increased, and then the reciprocating times and the filtration times of each dust remover are increased. The induced draft fan 5 is a gas power source provided for the whole set of closed self-circulation airflow.

The main machine closed body is a closed space, the dry separation system is arranged in the closed space, materials to be subjected to dry separation are conveyed into the dry separation system through a closed conveying belt, and then the materials to be subjected to dry separation are conveyed to a feeding port of the dry separation system through a feeding machine. Taking a single-layer sorting bed as an example (composite dry separation equipment can also be used), the materials enter the sorting bed with certain longitudinal and transverse gradients, and a material bed layer with certain thickness is formed on the bed surface. The material at the bottom layer of the bed layer moves to the back plate under the action of the vibration inertia force, and the material is guided by the back plate to turn upwards. The coal with lower density is turned over to the upper layer and slides down along the surface of the bed layer under the action of gravity. Due to the vibration force and the pressure of the materials continuously entering the separation bed, the continuously overturned materials form spiral motion and move to the gangue end. Because the width of the bed surface is gradually reduced, coal with low density slides downwards from the surface, the coal at the lowest layer is continuously discharged through the discharge baffle, and gangue, pyrite and the like with high density are gradually concentrated at the gangue end to be discharged. The bed surface is evenly distributed with a plurality of air holes to ensure that the bed layer is fully loosened. The material will be subjected to a sorting action during each cycle of the cycle. After multiple sorting, various products with ash content from low to high can be obtained.

In addition, the dry method using the zero-emission dry separation system provided by the invention comprises the following steps: the first step, construct a closed operation body, wherein regard host closed body 1 forming the airtight space as the main body to implement, install the dry separation system in the airtight space; secondly, constructing a multi-level and multi-level filtering system, wherein each group of filtering system is formed by matching a gravity settling dust collector and a bag-type dust collector, and selecting a proper group of filtering systems according to the requirement of industrial production, wherein the filtering systems are mainly used for removing large-particle dust; thirdly, constructing a multi-stage dehumidification drainage system for reducing and removing moisture or humidity contained in the gas; fourthly, constructing an inertial dust removal system and an automatic monitoring system, wherein the inertial dust removal system is linked with an induced draft power system, a filtering system and a dehumidification drainage system; and fifthly, the gas pressure in the closed system is adjusted through the automatic monitoring system and the induced draft power system, and the closed circulation of the airflow of the zero-emission dry separation system is realized. Furthermore, different slag discharging and dust discharging ports are arranged on the gravity settling dust remover and the bag-type dust remover, and the benign operation of the system is realized through slag accumulation real-time monitoring.

Further, in the zero-emission dry separation system, when the dry separation system arranged in the main machine closed body 1 works, fine-particle coal dust in the raw material can be blown up and mixed with air to form dust gas, the dust gas can be sucked into the gravity settling dust collector 3 through the dust removal pipeline 12 by the air flow driven by the draught fan 5, the gravity settling dust collector 3 firstly filters out a part of large-particle dust, then the rest dust gas enters the bag-type dust collector 4, and clean gas meeting the environmental protection requirement is discharged through the high-efficiency filtration of the bag-type dust collector 4; the bag-type dust collector 4 adopts multi-order fine pore diameter filtration, and can filter out finer or fine dust particles. After that, the clean gas enters a condensed water collector 6 through a No. 1 clean air pipeline 7, the condensed water collector 6 collects the moisture in the gas, the moisture is sent to an inertia filter 11 through a No. 2 clean air pipeline 8 for further purification and filtration, and the final purified gas is returned to the main machine enclosure 1 through a return air pipeline 2 and is supplied to a main machine of the dry separation system for use. In another embodiment, if the cleanliness and dryness of the gas after passing through the condensate collector 6 are both detected to meet environmental requirements, the filtered gas is directly transported back to the main machine enclosure 1 through the return air duct 2 and supplied to the main machine of the dry separation system for use. In the system, all gas flow processes are completely sealed, no gas is lost, a closed circulation is formed, and no pollution or environmentally-friendly gas is discharged into the air. In the present system, an air path may be further provided in the # 2 clean air duct 8, which communicates with the outside through an automatic open/close valve 9 and is discharged to the ambient environment through a discharge diffuser 10. In another embodiment, the zero-emission dry separation system is a closed circulation system, so that heat preservation measures can be conveniently taken for the zero-emission dry separation system, and the dry separation airflow can be effectively maintained at a certain temperature only by using the working waste heat of the dry separation system without providing excessive or extra energy for heating the dry separation airflow.

In another embodiment, the remote operation can be performed by a central control system or a monitoring system, the sensor signals arranged on each pipeline are collected to obtain the dust concentration of the automatically detected gas and the air pressure in the host enclosure, when the host enclosure 1 needs negative pressure and the treated gas reaches the emission standard, the automatic open-close valve 9 is opened, the clean gas is discharged to the atmosphere through the discharge diffuser 10 at the top of the pipeline, and the automatic operation of the whole system is completed.

As shown in fig. 2, the gravity settling filter includes an inlet air volume expansion diameter 301, a filter housing 302, a filter collecting taper pipe 303, a spiral diversion baffle 304, and a first air outlet 305. The density difference between the dust particles and the gas flow is utilized to enable the dust particles and the gas flow to generate relative movement and settle. In order to guarantee the effect of subsiding, the applicant has improved the gravity among the prior art through a lot of experiments, subsides the filter with the through type of the dust removal of general gravity subsides differently, the utility model discloses a speed that the air inlet dilatation reduces the air current. The dust airflow from the dust removal pipeline 13 is injected into an air inlet of the gravity settling filter, the air inlet of the gravity settling filter is an air inlet expansion reducing pipe 301, namely the air inlet expansion reducing pipe 301 is arranged at the upper part of the gravity settling filter and is connected with a filter shell 302 below the gravity settling filter, the filter shell 302 is connected with a filter collecting taper pipe 303 below the filter shell 302, and the air inlet expansion reducing pipe 301, the filter shell 302 and the filter collecting taper pipe 303 are kept on the same central axis, namely the central axes of the three are the same; a spiral diversion baffle 304 is arranged on the inner wall of the filter shell 302 and is used for further reducing the air flow speed; the first air outlet 305 is provided at the lower part of the filter housing 302, preferably at a position of 1/4 to 1/6, and is used for guiding the dust airflow after settling and dust removal to the subsequent bag-type dust collector 4. In order to further enhance the sedimentation effect, a heating grid is arranged at the joint of the air inlet expansion diameter 301 and the filter shell 302 for heating the dust airflow, so that the viscosity of dust particles in the dust airflow is increased and the sedimentation effect is increased. The heating mesh is perpendicular to the central axis of the filter housing 302 and the perimeter of the heating mesh is attached to the filter housing 302.

Further, the spiral flow guide baffle 304 arranged along the inner wall of the filter housing 302 has a certain height, and the spiral flow guide baffle 304 and the inner wall of the filter housing 302 form an included angle of 30-60 degrees and are arranged in a downward inclined manner and are spirally and rotatably arranged downwards along the inner ring of the filter housing 302. Preferably, the flow guide baffle 304 may be intermittently disposed on the inner wall of the filter housing 302, and a plurality of intermittently disposed flow guide baffles 304 are relatively staggered on the inner wall of the filter housing 302, so as to form a complete speed reduction stop ring. When the dusty airflow enters the gravity settling filter 3 along the arrow direction, the airflow firstly passes through the air inlet expansion reducing pipe 301, when the wind speed is reduced to a certain amount, a plurality of large-particle dust fall off the original track along the spiral guide plate 304, and finally fall into the filter collecting taper pipe 303 to be treated uniformly; in this way, a large part of large dust particles can be filtered out, and the unfiltered dust particles can enter the next stage of bag-type dust collector along the direction of the arrow along with the airflow through the first air outlet 305 for filtering treatment.

The bag-type dust collector is a dry dust collector suitable for collecting fine, dry, non-fibrous dust. The filter bag of the bag-type dust collector is made of woven filter cloth or non-woven felt, the dust-containing gas is filtered by the filtering action of the fiber fabric, when the dust-containing gas enters the bag-type dust collector, the dust with large particles and large specific gravity falls into the dust hopper due to the sedimentation of the gravity, and when the gas containing fine dust passes through the filter material, the dust is blocked, so that the gas is purified. Based on the fact that the dust removal effect of the bag-type dust remover is related to factors such as the temperature, the humidity, the chemical property, the particle size, the dust-containing concentration, the filtering air speed, the dust removal mode and the like of gas, a grid heating device is arranged between the gravity settling dust remover and the bag-type dust remover when necessary and used for improving the dust removal effect of the subsequent bag-type dust remover.

As shown in fig. 3, the condensate collector 6 includes a second air inlet 601, a blowdown valve 602, a condensation grate 603, a condenser tank 604, and a second air outlet 605. The second air inlet 601 is obliquely arranged at the middle lower part of the condenser tank 604, is generally arranged between 1/2-1/6 of the tank body of the condenser tank 604, and is preferably arranged between 1/3-1/4 of the tank body of the condenser tank 604. The condensation grate screen 603 is vertically arranged in the condenser tank 604, and is spaced from the condenser tank 604 by 1cm to 10cm, preferably by 3cm to 7cm, and more preferably by 4cm to 5 cm. The bottom of the condenser tank 604 is provided with a sewage valve 602, and the bottom of the condenser tank 604 is in an arc shape protruding outwards, so that sewage such as condensed water can be conveniently collected at a central sunken part. A vertical condenser tank 604 condenser is arranged on the body of the condenser tank 604, the condenser tank 604 condenser is connected with a second air outlet 605 arranged at the upper part of the condensed water collector, and an air channel connected with a third air inlet 1101 of the inertial filter 11 is arranged at the middle upper part of the condenser tank 604.

The nearly clean air flow enters the condenser tank 604 through the second air inlet 601, and the air flow directly impacts a condensation grate screen 603 arranged in the condenser tank 604, the grate screen is made of stainless steel and has a slit structure, the width of a single strip is about 3 mm, the gap between each strip is about 4-5 mm, and the length of the grate screen is about half of the circumference of the condenser tank 604. Under the impact of the high speed of the air flow, some water molecules in the air flow are slowly condensed on the condensation grate screen 603, and when a certain amount is achieved, small water drops are formed, slide down along the condensation grate screen 603 and are discharged out of the tank body through a sewage valve 602 at the bottom of the tank body. The condenser can 604 the condenser may employ a bellows or similar structure that further accelerates the condensation of moisture from the humid gas stream.

Generally, the water vapor content in the air is different according to different regions, and in winter, the water vapor in the air can be frozen to block a bed surface, a pipeline and the like of the dry separation system.

As shown in fig. 4, the inertial filter includes a third air inlet 1101, a filter housing 1102, a cartridge holder 1103, a cartridge 1104, a quick-open access door 1105, and a third air outlet 1106.

The third air inlet 1101 is connected with an air duct of a condenser of the condensate collector, the inside of the third air inlet is connected with a filter core pipe 1104, the filter core pipe 1104 is made of stainless steel fine mesh, is in an annular pipe shape, and is fixed in the filter shell 1102 by using a filter core pipe support 1103. The air current enters into filter core pipe 1104 from third inlet 1101, the tiny sieve mesh of filter core pipe 1104 just makes the resistance of wind increase, the air current will look for the direction that the resistance is little to flow, will spread outside the screen cloth, then some fine dust will glue in filter core pipe 1104, this can filter some fine dust, remaining dusty air current continues to walk in the core pipe the inside, the length of core pipe is very long, the dust in the air current can slowly fall in walking, until gluing on the sieve mesh of core pipe, accomplish the filtration process, finally, through the regular dust of clearing up on the filter core pipe 1104 of quick-open inspection door 1105. The third outlet 1106 of the inertial filter is provided at the rear end of the inertial filter, to which is attached a sensor 12 for monitoring the cleanliness and pressure of the airflow entering the host enclosure 1.

As shown in fig. 5, a group of clean air treatment systems is composed of a gravity settling dust collector 3, a bag-type dust collector 4 and a # 1 clean air pipeline, and a plurality of groups of proper clean air treatment systems connected in series can be selected and arranged according to actual needs to purify the working gas with maximum efficiency. Be provided with # 1 monitoring devices on return air pipeline 2, be provided with # 2 monitoring devices in host computer closure 1 upper portion and the position department that is close to dust removal pipeline 13, # 1 monitoring devices is used for monitoring the cleanliness factor of return air, parameters such as temperature and humidity, # 2 monitoring devices is used for monitoring the dust volume of the dust air current of following host computer closure 1 extraction, parameters such as temperature and humidity, the group number that clean wind processing system set up is adjusted according to # 1 monitoring devices and # 2 monitoring devices's data, and adjust the power of draught fan etc. according to # 1 monitoring devices and # 2 monitoring devices's data.

As shown in fig. 6, an ash discharge valve 306 is disposed at the lower part of the bottom end of the gravity settler, and is used for discharging small particles of dust or impurities or materials out of the gravity settler filter; in order to avoid the damage of large-particle materials or impurities to the main body of the equipment caused by rapid sedimentation, a large-aperture screen is arranged at the middle lower part of the gravity sedimentation filter, an ash discharge gate 307 is arranged at the position which is flush with the large-aperture screen or slightly lower than the horizontal plane of the large-aperture screen, and large-particle impurities accumulated on the large-aperture screen are cleaned from the ash discharge gate 307.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.

Claims (4)

1. A zero-emission dry separation system is characterized by comprising a main machine closing body (1), an air return pipeline (2), a gravity settling dust remover (3), a bag-type dust remover (4), a dust remover induced draft fan (5), a condensed water collector (6), a No. 1 clean air pipeline (7), a No. 2 clean air pipeline (8), an automatic opening and closing valve (9), an emission diffuser (10), an inertial filter (11) and a dust removal pipeline (13); the main machine closing body (1) is connected with an inlet of a gravity settling dust collector (3) through a dust removing pipeline (13), a first air outlet (305) of the gravity settling dust collector (3) is connected with an air inlet of a bag-type dust collector (4) arranged at the middle lower part of the bag-type dust collector (4), an air outlet of the bag-type dust collector (4) arranged at the upper part of the bag-type dust collector (4) is connected with an induced air pipe port of a dust collector induced draft fan (5) through a No. 1 clean air pipeline (7), an air outlet of the dust collector induced draft fan (5) is connected with a second air inlet (601) of a condensed water collector, and hot gas subjected to dehumidification and moisture reduction through the condensed water collector (6) sequentially passes through a No. 2 clean air pipeline (8) and an inertial filter (11) and then enters the dry separation main.

2. The dry separation system with zero emission according to claim 1, characterized in that a sensor (12) for dust concentration and gas pressure is arranged between the inertial filter (11) and the return air duct (2), the sensor (12) being linked with an automatic on-off valve (9) and a dust collector induced draft fan (5).

3. The zero-emission dry separation system according to claim 1, wherein the automatic open/close valve (9) is automatically opened only when the dust concentration of the gas is detected to meet the environmental protection requirement and the air pressure in the main machine enclosure is greater than the safe pressure of the circulating operation, and the clean and environmental-friendly gas is discharged to the external environment through the discharge diffuser.

4. The zero-emission dry separation system according to claim 1, wherein when the dust concentration of the gas does not satisfy the environmental protection, the working attraction of a draft fan (5) of the dust remover is increased, the flow rate of the gas in the closed circulating body is increased, and the number of round trips in each dust remover is increased and the number of filtration is increased.

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