CN113122334A - Inflation filtering system and using method thereof - Google Patents
Inflation filtering system and using method thereof Download PDFInfo
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- CN113122334A CN113122334A CN202110532141.8A CN202110532141A CN113122334A CN 113122334 A CN113122334 A CN 113122334A CN 202110532141 A CN202110532141 A CN 202110532141A CN 113122334 A CN113122334 A CN 113122334A
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- filter
- pipeline
- buffer tank
- pulverized coal
- aerated
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/50—Fuel charging devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/04—Cleaning filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
- B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention aims to provide an inflation filtering system and a using method thereof, which are used for solving the problems of blockage, deformation, breakage, difficulty in maintenance and the like of an inflation cone and realizing long-term stable operation of a pulverized coal conveying unit; in order to achieve the above object, the present invention provides an aerated filter system, comprising: the device comprises a preheater, a buffer tank, a filter and a lock hopper system, wherein the buffer tank is connected with a battery compartment through a pipeline and used for receiving inert gas from the battery compartment, and the preheater is arranged on the pipeline; the buffer tank is connected with the filter and the lock hopper system respectively, the filter is used for preventing the inside fine coal of lock hopper system from scurrying, preferably, buffer tank import department is equipped with air inlet pressure regulating valve and trip valve.
Description
Technical Field
The invention relates to the technical field of coal chemical industry, in particular to an inflatable filtering system and a using method thereof.
Background
The aerospace coal gasification technology pushes the coal chemical industry to a new development high point, and adopts a pneumatic pulverized coal pressurized conveying method, so that the stability of a pulverized coal pressurized conveying unit plays a crucial role in the long-period operation of a gasification furnace.
The principle of the pulverized coal conveying unit is that normal pressure pulverized coal is intermittently pressurized into high pressure pulverized coal by adopting a lock hopper scheme, then the high pressure pulverized coal is conveyed into a high pressure tank, and then the high pressure tank is continuously conveyed into a gasification furnace to carry out a series of oxidation-reduction reactions with a gasification agent. The most important locking system in the fine coal conveying unit, the locking system equipment all are vary voltage operating environment, and the alternating range is 0 ~ 7.5MPaG, and traditional locking system equipment mainly includes: the device comprises a pulverized coal lock hopper, an inflation flute pipe, an inflation cone, a pipeline aerator and a high-pressure carbon dioxide filter at the top of the pulverized coal lock hopper, wherein inflation equipment (the inflation flute pipe, the inflation cone and the pipeline aerator) all adopt sintered metal structures. However, in the actual production operation of a project, the condition that the charging cone is blocked, deformed and broken by sintered metal often occurs, so that the pulverized coal in the lock hopper is reversely blown to a carbon dioxide/nitrogen pipeline, the carbon dioxide/nitrogen enters other positions in the system, abrasion and blockage can be generated on the pipeline or a pipe fitting, the gasification furnace can be relieved of load or even stopped due to instability of the pulverized coal conveying unit in serious cases, and once the charging cone breaks down, the maintenance is extremely inconvenient. Therefore, the problems of blockage, deformation, breakage, difficulty in maintenance and the like of the inflation cone are solved, the long-term stable operation of the pulverized coal conveying unit is ensured, and the problem to be solved in the existing coal gasification technology is solved.
CN209475792U provides a pulverized coal lock hopper pressure-releasing filter device in a dry pulverized coal pressurized dense-phase conveying system, which comprises a pulverized coal bin, a pressure-reducing filter, a pulverized coal lock hopper and a back-blowing mechanism, wherein the pulverized coal lock hopper is arranged below the pulverized coal bin, and a feeding port at the top of the pulverized coal lock hopper is connected with a discharging port at the bottom of the pulverized coal bin through a pipeline; the pressure reducing filter is arranged above the pulverized coal bin, and a pressure relief gas outlet of the pulverized coal lock hopper is connected with the pressure reducing filter; the pressure reducing filter is provided with an exhaust gas outlet for discharging the exhaust gas; the back flushing mechanism is connected with a back flushing inlet of the decompression filter, a bottom outlet of the decompression filter is connected with a feeding port at the top of the pulverized coal bin through a pipeline, but the system has the problems that a pulverized coal lock bucket inflation cone is easy to deform, break and difficult to overhaul, and the stability of the coal conveying system is influenced.
Therefore, the technical problem to be solved urgently is to provide an inflation filtering system and a using method thereof in the technical field of coal chemical industry in a targeted manner.
Disclosure of Invention
The invention aims to provide an inflation filtering system and a using method thereof, which are used for solving the problems of blockage, deformation, breakage, difficulty in maintenance and the like of an inflation cone and realizing long-term stable operation of a pulverized coal conveying unit.
In order to achieve the above object, the present invention provides an aerated filter system, comprising: the device comprises a preheater, a buffer tank, a filter and a lock hopper system, wherein the buffer tank is connected with a battery compartment through a pipeline and used for receiving inert gas from the battery compartment, and the preheater is arranged on the pipeline; the buffer tank is connected with the filter and the lock hopper system respectively, the filter is used for preventing the inside fine coal of lock hopper system from scurrying, preferably, buffer tank import department is equipped with air inlet pressure regulating valve and trip valve.
Further, the lock hopper system comprises: the device comprises a pulverized coal locking bucket, an inflation flute pipe, an inflation cone and a pipeline inflator, wherein the inflation cone is connected with the filter through a pipeline, the bottom of the pulverized coal locking bucket is connected with the pipeline inflator, the pulverized coal locking bucket receives solid pulverized coal from a normal pressure tank through a pipeline, and the pipeline inflator is used for conveying the pressurized pulverized coal to a high pressure tank; preferably, the inflation cone is of a steel plate punching structure, the design pressure difference of the inflation cone is greatly improved, and the problems of deformation, breakage and the like of the inflation cone caused by the large pressure difference between the inside and the outside of the inflation cone can be solved.
Furthermore, the buffer tank is connected with the inflation flute pipe through more than one pipeline, and an air inlet pressure regulating valve and a stop valve are arranged on the pipeline.
Furthermore, the buffer tank is connected with the pipeline aerator through more than one pipeline, and an air inlet pressure regulating valve and a stop valve are arranged on the pipeline.
Furthermore, the buffer tank is connected with the filter through more than one pipeline, and an air inlet pressure regulating valve and a stop valve are arranged on the pipeline; preferably, a filter is arranged on a pipeline connecting the inflation flute pipe and the buffer tank, and a filter is arranged on a pipeline connecting the pipeline inflator and the buffer tank.
Furthermore, a normally open pipeline is arranged between the buffer tank and the filter, and a flow limiting pore plate is arranged on the pipeline.
Furthermore, the filter is connected with a back-blowing device, the back-blowing device is connected with a back-blowing air source from a battery compartment, and the back-blowing device is used for solving the blockage problem of the filter.
The use method of the aeration filtering system is characterized in that inert gas from a battery compartment enters a preheater to be heated, and the heated inert gas enters a buffer tank; one part of the inert gas in the buffer tank is respectively introduced into the filter, the pipeline aerator and the aeration flute pipe through pipelines, and the other part of the inert gas enters the filter through a normally open pipeline; a back-blowing air source in the boundary region enters the filter through the back-blowing device, so that the problem of blockage of the filter is avoided; solid pulverized coal from the normal pressure tank enters the pulverized coal lock hopper through a pipeline, and the pressurized pulverized coal enters the high pressure tank through the pipeline aerator.
Further, the back flushing device is interlocked with the inlet and outlet pressure difference of the filter, when the inlet and outlet pressure difference of the filter reaches a preset interlocking value, a stop valve arranged on a back flushing pipeline is opened in an interlocking mode, the filter is back flushed, the filter is prevented from being blocked by coal dust, the preset interlocking value range is 10-80 kPa, and preferably the preset interlocking value is 20 kPa.
Further, the temperature of an air source in the preheater is consistent with that of pulverized coal, the temperature range is 60-150 ℃, and preferably, the temperature is 80 ℃.
The invention has the advantages that:
1. the back-blowing device is arranged on the filter, and when the pressure difference between the inlet and the outlet of the filter is overlarge, the back-blowing system is started, so that the filter can be effectively prevented from being blocked.
2. The inflation cone provided by the invention is of a steel plate punching structure, greatly improves the design pressure difference of the inflation cone, and can solve the problems of deformation, breakage and the like of the inflation cone caused by large internal and external pressure difference of the inflation cone
Drawings
FIG. 1 is a schematic view of an aerated filter system according to the present invention.
As shown in the figure, the device comprises a preheater 1, a buffer tank 2, a flow-limiting orifice plate 3, a filter 4, an inflation cone 5, a pipeline aerator 6, an inflation flute pipe 7, a blowback device 8, an atmospheric pressure tank 9, a high-pressure tank 10 and a pulverized coal lock bucket 11.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
Example 1
As shown in fig. 1, an aerated filter system comprising: the device comprises a preheater 1, a buffer tank 2, a filter 4 and a lock hopper system, wherein the buffer tank 2 is connected with a battery compartment through a pipeline and used for receiving inert gas from the battery compartment, and the preheater 1 is arranged on the pipeline; buffer tank 2 respectively with filter 4 and lock system connection of fighting, filter 4 is used for preventing the inside fine coal of lock system of fighting from scurrying, 2 import departments of buffer tank are equipped with admission pressure regulating valve and trip valve.
The lock hopper system comprises: the device comprises a pulverized coal locking bucket 11, an inflation flute pipe 7, an inflation cone 5 and a pipeline inflator 6, wherein the inflation cone 5 is connected with the filter 4 through a pipeline, the bottom of the pulverized coal locking bucket 11 is connected with the pipeline inflator 6, the pulverized coal locking bucket 11 receives solid pulverized coal from a normal pressure tank 9 through a pipeline, and the pipeline inflator 6 is used for conveying the pressurized pulverized coal to a high pressure tank 10; the inflation awl 5 is the steel sheet structure of punching, has improved the design pressure differential of inflation awl 5 greatly, can solve because of the inflation awl 5 inside and outside pressure differential cause greatly aerify the awl 5 warp, fracture scheduling problem.
Buffer tank 2 through one pipeline with aerify 7 connections of flute pipe, be equipped with inlet pressure governing valve and trip valve on the pipeline, buffer tank 2 through one pipeline with pipeline aerator 6 is connected, is equipped with inlet pressure governing valve and trip valve on the pipeline, buffer tank 2 through one pipeline with filter 4 is connected, is equipped with inlet pressure governing valve and trip valve on the pipeline, filter 4 is connected with blowback device 8, blowback device 8 is connected with the blowback air supply that comes from the boundary area, blowback device 8 is used for solving filter 4's jam problem, buffer tank 2 with be equipped with normally open pipeline between the filter 4, be equipped with current-limiting orifice plate 3 on the pipeline, normally open pipeline is used for fluidization fine coal for the unloading of lock fill system is more smooth and easy.
The method comprises the following specific working steps: carbon dioxide from a boundary area enters the preheater 1 to be heated, heat is exchanged by low-pressure steam in the preheater 1, low-pressure steam condensate generated after heat exchange is sent back to the condensate recovery device, the temperature of an air source in the preheater 1 is consistent with that of pulverized coal, the temperature is 80 ℃, the preheating temperature of an inflation air source cannot be too high or too low, when the pulverized coal lock hopper 11 is depressurized, the pulverized coal and the high-pressure carbon dioxide in the pulverized coal lock hopper 11 can be directly contacted with a filter bag of a filter at the top of the normal pressure tank 9, the filter bag bears limited temperature, if the temperature is too high, the filter bag can be damaged, the filter bag filtering effect is influenced, meanwhile, the temperature is too high, the explosion-proof requirement on the whole device system can be improved, and the pulverized coal; if the coal powder is not preheated or the preheating temperature is too low, the volume of the gas is changed rapidly in the pressure relief process of the coal powder lock hopper 11, the heat of the external environment can be absorbed, and the moisture in the external environment can be condensed, so that the coal powder is wet and is not beneficial to conveying the coal powder;
the heated carbon dioxide enters the buffer tank 2, when the pressure of the carbon dioxide in the buffer tank 2 is higher than the pressure of the carbon dioxide in a boundary area, the air inlet pressure regulating valve and the stop valve at the inlet of the buffer tank 2 can be closed in an interlocking manner, and when the pressure of the carbon dioxide in the buffer tank 2 is lower than the pressure of the carbon dioxide in the boundary area, the air inlet pressure regulating valve and the stop valve at the inlet of the buffer tank 2 can be opened in an interlocking manner;
in the process of pressurizing the bottom of a pulverized coal lock hopper 11, simultaneously opening a three-way cut-off valve and an air inlet pressure regulating valve of an air inflation flute pipe 7, an air inflation cone 5 and a pipeline aerator 6, introducing one part of inert gas in a buffer tank 2 into a filter 4, the pipeline aerator 6 and the air inflation flute pipe 7 respectively through pipelines, introducing the other part of inert gas into the filter 4 through a normally open pipeline, and controlling the opening degrees of the three-way air inlet pressure regulating valve respectively by using the internal and external pressure difference of three air inflation devices to prevent the internal structure of the equipment from being damaged due to the excessive internal and external pressure difference of the air inflation devices, wherein the general pressure difference is controlled to be 0.2-0.8;
a back-blowing air source in a boundary area enters the filter 4 through the back-blowing device 8, the problem that the filter 4 is blocked is avoided, the back-blowing device 8 is interlocked with the inlet and outlet pressure difference of the filter 4, when the inlet and outlet pressure difference of the filter 4 reaches a preset interlocking value, a stop valve arranged on a back-blowing pipeline is interlocked and opened, the filter 4 is back-blown, the filter 4 is prevented from being blocked by coal dust, and the preset interlocking value is 20 kPa;
solid pulverized coal from the atmospheric pressure tank 9 enters the pulverized coal lock 11 through a pipeline, and pressurized pulverized coal enters the high pressure tank 10 through the pipeline aerator 6.
Example 2
In addition to embodiment 1, a filter 4 is disposed on a pipeline connecting the gas filling flute 7 and the buffer tank 2, and a filter 4 is disposed on a pipeline connecting the pipeline aerator 6 and the buffer tank 2.
It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
Claims (10)
1. An aerated filter system comprising: the device comprises a preheater (1), a buffer tank (2), a filter (4) and a lock hopper system, wherein the buffer tank (2) is connected with a battery compartment through a pipeline and receives inert gas from the battery compartment, and the preheater (1) is arranged on the pipeline; buffer tank (2) are connected with filter (4) and lock fill system respectively, filter (4) are used for preventing the inside fine coal of lock fill system from scurrying.
2. The inflatable filtration system of claim 1, wherein the lock hopper system comprises: fine coal lock fill (11), aerify flute pipe (7), aerify awl (5) and pipeline aerator (6), aerify awl (5) through the pipeline with filter (4) are connected, the bottom of fine coal lock fill (11) with pipeline aerator (6) are connected, fine coal lock fill (11) receive the solid fine coal who comes from ordinary pressure jar (9) through the pipeline, pipeline aerator (6) are used for carrying the fine coal after the pressurization to high-pressure tank (10).
3. An aerated filter system according to claim 2 wherein the buffer tank (2) is connected to the aerated flute (7) by one or more pipes.
4. An aerated filter system according to claim 3 wherein the buffer tank (2) is connected to the duct aerator (6) by more than one conduit.
5. An aerated filter system according to claim 4 wherein the buffer tank (2) is connected to the filter (4) by one or more conduits.
6. An aerated filter system according to claim 5 wherein a normally open line is provided between the buffer tank (2) and the filter (4) and a restriction orifice (3) is provided in the line.
7. An aerated filter system according to claim 5 wherein the filter (4) is connected to a blow-back means (8), the blow-back means (8) being connected to a source of blow-back gas from the battery compartment, the blow-back means (8) being arranged to overcome clogging of the filter (4).
8. A method of using an aeration filter system according to any one of claims 1 to 7 wherein the inert gas from the battery compartment is heated in a preheater (1) and the heated inert gas is fed to a buffer tank (2); one part of inert gas in the buffer tank (2) is respectively introduced into the filter (4), the pipeline aerator (6) and the aeration flute pipe (7) through pipelines, and the other part of inert gas enters the filter (4) through a normally open pipeline; a back-blowing air source of the battery compartment enters the filter (4) through a back-blowing device (8), so that the problem of blockage of the filter (4) is avoided; solid pulverized coal from the normal pressure tank (9) enters the pulverized coal lock hopper (11) through a pipeline, and the pressurized pulverized coal enters the high pressure tank (10) through the pipeline aerator (6).
9. The use method of the aerated filter system according to claim 8, wherein the back flushing device (8) is interlocked with the inlet and outlet pressure difference of the filter (4), when the inlet and outlet pressure difference of the filter (4) reaches a preset interlocking value, a cut-off valve arranged on a back flushing pipeline is interlocked and opened, the filter (4) is back flushed, the filter (4) is prevented from being blocked by coal dust, and the preset interlocking value range is 10-80 kPa.
10. Use of an aerated filter system according to claim 8 wherein the air supply temperature in the preheater (1) is in accordance with the temperature of the pulverized coal and is in the range of 60-150 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110532141.8A CN113122334A (en) | 2021-05-17 | 2021-05-17 | Inflation filtering system and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110532141.8A CN113122334A (en) | 2021-05-17 | 2021-05-17 | Inflation filtering system and using method thereof |
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| CN113122334A true CN113122334A (en) | 2021-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110532141.8A Pending CN113122334A (en) | 2021-05-17 | 2021-05-17 | Inflation filtering system and using method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115815246A (en) * | 2022-12-05 | 2023-03-21 | 核工业理化工程研究院 | Reverse purging method and device for blocking of negative pressure vacuum pipeline |
-
2021
- 2021-05-17 CN CN202110532141.8A patent/CN113122334A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115815246A (en) * | 2022-12-05 | 2023-03-21 | 核工业理化工程研究院 | Reverse purging method and device for blocking of negative pressure vacuum pipeline |
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