CN112480977A - High-temperature high-efficiency dust removal method for pyrolysis raw gas - Google Patents
High-temperature high-efficiency dust removal method for pyrolysis raw gas Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/02—Dust removal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/02—Dust removal
- C10K1/024—Dust removal by filtration
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/04—Purifying combustible gases containing carbon monoxide by cooling to condense non-gaseous materials
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/04—Purifying combustible gases containing carbon monoxide by cooling to condense non-gaseous materials
- C10K1/046—Reducing the tar content
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
- C10K1/10—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids
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Abstract
The application discloses a high-temperature high-efficiency dust removal method for pyrolysis crude gas, which comprises the steps that an air inducing device is externally connected with a machine shell, a gas purifying chamber forms negative pressure, and high-temperature dust-containing crude gas is pumped into a pre-dust remover from an outlet of a coal gasification furnace for preliminary dust removal; the pre-dedusted crude gas enters a dust collecting chamber, is subjected to fine dedusting by using a ceramic fiber filter tube and enters a gas purifying chamber to obtain high-temperature purified gas; the high-temperature clean gas is transferred into a washing tower and a drop catcher for deep purification and cooling to finish dust removal; after long-time work, the ceramic fiber filter tube is subjected to back-blowing ash removal by using a high-pressure back-blowing system. The dust removal method can directly filter high-temperature dust-containing raw gas, improves the condition that the raw gas needs to be cooled before being filtered by the cloth bag dust removal device in the existing coal gas production process, and effectively solves the problems that dust below 2 mu m is separated again and separated and the like.
Description
Technical Field
The application relates to the technical field of coal gas dust removal and purification, in particular to a high-temperature and high-efficiency dust removal method for pyrolysis raw gas.
Background
The coal gas production refers to a process of introducing air, water vapor or hydrogen and the like into coal or coal coke under the conditions of high temperature and high pressure to prepare combustible gas, and is an important way and means for cleanly utilizing coal resources.
The coal gasification combined cycle power generation system promotes the development of the coal gas technology, but high-temperature coal gas prepared from the coal gas contains a large amount of dust, so that the quality of the coal gas is reduced, blades of a gas turbine are abraded, and the service life and the working efficiency of the gas turbine are reduced. Therefore, it is necessary to perform dust removal and purification treatment on the high-temperature coal gas produced from coal gas.
As shown in fig. 1, the current dust removal process flow of coal gas is that high-temperature dust-containing raw gas discharged from the outlet of a coal gasifier 7 is firstly introduced into a waste heat recovery system 8, and is introduced into a bag-type dust remover 9 for dust removal treatment after the temperature of the raw gas is reduced to below 200 ℃; the gas after the first dust removal flows to the washing tower 10, and the gas is deeply purified and cooled by cooling water again, and the temperature of the clean gas reaches normal temperature basically. The treated coal gas enters a drop catcher 20 to catch liquid drops carried in the coal gas, and finally the coal gas is conveyed to a gas using point for use by a pressurizing machine according to the required pressure.
The composition of the high-temperature dust-containing crude gas is very complex, the initial temperature of the crude gas is about 500-800 ℃, the crude gas is sensitive to temperature change, and tar is extremely easy to condense when the temperature is reduced; in the process flow, the crude gas is cooled to separate out tar, and then the tar and dust particles are agglomerated and adhered to the surface of the inner wall of equipment, so that the equipment and a pipeline are blocked, and the service life of the dust removal device is seriously influenced.
Disclosure of Invention
Aiming at the problems, the application provides a high-temperature and high-efficiency dust removal method for pyrolysis raw gas.
The application provides a pyrolysis raw gas high-temperature efficient dust removal method, which adopts the following technical scheme:
a high-temperature and high-efficiency dust removal method for pyrolysis raw gas utilizes modular dust removal equipment to remove dust, wherein the dust removal equipment comprises a machine shell, a high-temperature ceramic filtering system, a high-pressure back-blowing system and a pre-dust removal system, the high-temperature ceramic filtering system divides the interior of the machine shell into an independent dust collecting chamber and an independent air purifying chamber, and the high-temperature ceramic filtering system is positioned in the dust collecting chamber and communicates the dust collecting chamber with the air purifying chamber; the high-pressure back-blowing system is arranged in the air purifying chamber and performs back-blowing work towards the dust collecting chamber; the pre-dedusting system is positioned outside the casing, the input end of the pre-dedusting system is communicated with the output end of the coal gasifier, and the output end of the pre-dedusting system is communicated with the dust collecting chamber;
the dust removal method comprises the following steps:
the shell is externally connected with an induced draft device, so that the air purifying chamber forms negative pressure, and the high-temperature dust-containing crude gas is pumped into the pre-dust remover from the outlet of the coal gasifier for preliminary dust removal;
the pre-dedusted crude gas enters a dust collecting chamber, is subjected to fine dedusting by using a ceramic fiber filter tube and enters a gas purifying chamber to obtain high-temperature purified gas;
the high-temperature clean gas is transferred into a washing tower and a drop catcher for deep purification and cooling to finish dust removal;
after long-time work, the ceramic fiber filter tube is subjected to back-blowing ash removal by using a high-pressure back-blowing system.
By adopting the technical scheme, the high-power induced draft fan is externally connected to the air outlet of the shell, air is continuously pumped outwards, so that the air purifying chamber forms negative pressure, when the dust removing equipment works, large-particle dust removing treatment is firstly carried out on high-temperature dust-containing raw gas which is not subjected to temperature reduction treatment by the pre-dust removing system, fine dust particles are filtered by the high-temperature ceramic filtering system, and finally the fine dust particles are discharged from the air outlet of the shell and transferred to the next process; the high-pressure back-blowing system is used for back-blowing and ash removal of the high-temperature ceramic filtering system, and the filtering performance of the high-temperature ceramic filtering system is guaranteed.
In the dust removal process, dust removal equipment is directly connected with an outlet of a pyrolysis furnace, dust entrained by 0.3 mu m of crude gas is effectively removed under the working condition of the temperature of 300-700 ℃, the requirement of clean gas of 5mg/Nm3 is met by one-time filtration, and the dust removal equipment has the advantages of strong acid and alkali resistance, small thermal inertia and super long service life of 6-8 years; the problems of pipe blockage, sintering, dust separation after dust separation under 2 mu m and the like in the conventional coal gas production process are directly solved, and the safety production risk of burning and explosion is reduced.
Optionally, in the pre-dedusting process, the temperature of the pre-dedusted raw gas is controlled below 700 ℃ by a temperature control mechanism arranged in the pre-deduster.
By adopting the technical scheme, the temperature of the raw gas is controlled below 700 ℃ so as to ensure the normal and stable work of the high-temperature ceramic filtering system.
Optionally, in the pre-dedusting process, the temperature control mode adopts air cooling temperature control.
By adopting the technical scheme, the air cooling has the characteristic of soft temperature change, the sudden temperature change can not occur, and the problem caused by the temperature sensitivity of high-temperature coal gas can be effectively improved.
Optionally, in the pre-dedusting process, a gravity deduster is used for pre-dedusting treatment.
Through adopting above-mentioned technical scheme, the coarse coal gas reduces the air current velocity of flow and changes the flow direction in the inside air current that reduces suddenly of dust catcher in advance, and the dust of great granule is under gravity and inertial force effect, subsides to dust catcher bottom in advance, effectively carries out the dust removal processing in advance to the coarse coal gas.
Optionally, in the fine dust removal process, the temperature control mechanism arranged in the high-pressure blowback system prevents the high temperature inside the casing from being transmitted to the high-pressure blowback system.
By adopting the technical scheme, high temperature in the shell is prevented from being transmitted to the high-pressure back flushing system, and the working stability of high-pressure back flushing gas is guaranteed.
Optionally, the temperature control mode of the high-pressure blowback system is water-cooling temperature control.
Through adopting above-mentioned technical scheme, the water-cooling effect is rapid, can effectively avoid high temperature to transmit to among the high-pressure blowback system.
Optionally, in the process of back-blowing and ash removal, the gas blown out by the high-pressure back-blowing system is nitrogen.
Optionally, in the process of back flushing and ash removing, the high-pressure back flushing system can independently purge any ceramic fiber filter tube.
Optionally, before the high-temperature clean gas is subjected to deep purification and cooling, the high-temperature clean gas is transferred to a waste heat recovery system for heat recovery.
By adopting the technical scheme, the waste heat recovery system can recycle heat of high-temperature clean coal gas, and the energy-saving benefit of the dust removal system is improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the dust removal method can directly filter high-temperature dust-containing raw gas, improves the condition that the raw gas needs to be cooled before being filtered by the cloth bag dust removal device in the existing coal gas production process, effectively solves the problems of pipe blockage, sintering, separation of dust below 2 mu m and the like, and reduces the safety production risk of burning and explosion;
2. the regeneration of the cleaning function of the ceramic fiber filter tube can be realized through a high-pressure back flushing system, and the ash removal efficiency of the fiberboard is ensured;
3. the temperature control mechanism is additionally arranged in the high-pressure back flushing system and the pre-dedusting system, so that the safety and the stability of the equipment can be effectively improved, and the service life of the equipment can be effectively prolonged.
Drawings
FIG. 1 is a schematic diagram of a current dust removal process for coal gas production;
FIG. 2 is a left side view of the dust removing device in the embodiment of the present application;
FIG. 3 is a front view of a dust removing apparatus in the embodiment of the present application;
FIG. 4 is a schematic diagram of a coal gas dedusting process using the dedusting apparatus of the present application.
Description of reference numerals: 1. a housing; 11. a gas purifying chamber; 12. a dust collecting chamber; 2. a high temperature ceramic filtration system; 21. mounting a plate; 22. a ceramic fiber filter tube; 3. a high pressure blowback system; 31. a back-blowing air bag; 32. a blowback pipeline; 33. a purge tube; 34. a control valve; 35. a sleeve-type water cooler; 36. a support; 4. a pre-dust removal system; 41. a pre-deduster; 42. an air cooler; 43. a cooling fan; 5. an ash discharge valve; 6. a dust collection tank; 7. a coal gasifier; 8. a waste heat recovery system; 9. a bag-type dust collector; 10. a washing tower; 20. a drip catcher.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
The embodiment of the application discloses integrative modularization dust collecting equipment of high-efficient explosion-proof type of pyrolysis raw gas high temperature, as shown in fig. 2, 3, integrative modularization dust collecting equipment of high-efficient explosion-proof type of pyrolysis raw gas high temperature includes casing 1, high-temperature ceramic filtration system 2, high-pressure blowback system 3 to and dust pelletizing system 4 in advance.
Wherein, the inside of the casing 1 is provided with a chamber allowing the medium to flow in or out, the outer side of the casing 1 is provided with an air inlet and an air outlet which are communicated with the chamber, and the air outlet is relatively positioned above the air inlet. The outside cladding of casing 1 has thermal-insulated heat preservation for reduce the influence each other of high temperature casing 1 and surrounding environment.
The high-temperature ceramic filtering system 2 comprises an installation plate 21 and a ceramic fiber filtering pipe 22, wherein the installation plate 21 is horizontally fixed in a sealed manner in a cavity of the machine shell 1, and the cavity is divided into an independent air purifying chamber 11 and a dust collecting chamber 12 from top to bottom; the fixing mode of the mounting plate 21 can be flange connection or welding. The air inlet of the machine shell 1 is communicated with a dust collecting chamber 12, and the air outlet is communicated with an air purifying chamber 11; a gas pressure sensor is installed in the air purifying chamber 11.
The main body of the ceramic fiber filter tube 22 is in a straight tube shape, one end of the ceramic fiber filter tube is closed, and the other end of the ceramic fiber filter tube is opened; the ceramic fiber filter tube 22 is made of a composite material of SiC fibers and ZrO2 ceramic, the pore size is 0.1-5 μm, and the porosity is about 33 +/-2%.
Evenly arrange the flower hole on the mounting panel 21, ceramic fiber filter tube 22 quantity sets up to the multiunit, all adorns in every flower hole of mounting panel 21 and inlays a set of ceramic fiber filter tube 22, makes ceramic fiber filter tube 22 vertical distribution in dust collecting chamber 12. The open end of the ceramic fiber filter tube 22 is sealingly arranged with the mounting plate 21 at the sealing assembly point.
The high-pressure back blowing system 3 comprises a back blowing air bag 31, a back blowing pipeline 32 and a purging pipe 33, wherein the back blowing air bag 31 is positioned outside the machine shell 1, and the back blowing air bag 31 is fixedly arranged on the machine shell 1 through a preparation bracket 36; the blowback air bag 31 can be connected with an air pump to provide continuous high pressure for the air pump. The gas in the blowback gas bag 31 may be selected to be nitrogen.
One end of the blowback pipeline 32 is connected with the blowback air bag 31, and the other end is introduced into the air purifying chamber 11 of the casing 1. The number of the purging pipes 33 is the same as that of the ceramic fiber filter pipes 22, and the plurality of groups of purging pipes 33 are vertically distributed in the air purifying chamber 11 of the machine shell 1 and correspond to the distribution positions of the ceramic fiber filter pipes 22 one by one; the upper end of the purging pipe 33 is connected with the back flushing pipeline 32, and the lower end of the purging pipe 33 passes through the flower holes and extends into the ceramic fiber filter tube 22. A control valve 34 is separately arranged at the connection part of the purge pipe 33 and the blowback pipeline 32.
The part of the back flushing pipeline 32 outside the casing 1 is provided with a sleeve type water cooler 35 for controlling the temperature of the gas flowing in the back flushing pipeline 32, so as to prevent the high temperature inside the casing 1 from being transferred to the back flushing air bag 31 and affecting the stability of the high-pressure back flushing gas.
The pre-dust removal mechanism includes a pre-dust remover 41, a tube bundle air cooler 42, and a cooling fan 43. The pre-dust collector 41 can be a gravity dust collector or a spiral dust collector, and is selected as a gravity dust collector in the embodiment; the gas inlet of the pre-dust remover 41 is used as a high-temperature dust-containing raw gas inlet and is connected with the outlet of the coal gasifier 7; the air outlet of the pre-dust collector 41 is connected with the air inlet of the machine shell 1. The raw gas introduced into the pre-dust collector 41 suddenly reduces the flow velocity of the air flow and changes the flow direction in the pre-dust collector 41, and the dust with larger particles is separated from the air flow under the action of gravity and inertia force and settles to the bottom of the pre-dust collector 41.
The bottom of the pre-dust collector 41 is set to be a conical bottom to be used as a dust collecting bin for primarily collecting settled dust. The bottom of the pre-dust collector 41 is connected to a dust collecting tank 6 through an ash discharge valve 5, and dust accumulated in the dust collecting bin is finally discharged into the dust collecting tank 6. The bottom of the casing 1 is also provided with a conical bottom, and is provided with a dust discharge valve 5, a dust collection tank 6 and the like, so as to collect the discharged dust.
The tube bundle type air cooler 42 is installed in the pre-dust collector 41, and the cooling fan 43 is connected with the air cooler 42 to provide a cold source for the tube cooler. The cooling fan 43 is matched with the air cooler 42 to control the temperature of the crude gas introduced into the pre-dust collector 41, and the temperature of the crude gas is controlled below 700 ℃ so as to ensure the normal and stable work of the high-temperature ceramic filtering system 2.
As shown in fig. 4, the dust removal process of the coal gas by using the high-temperature high-efficiency explosion-proof type integrated modular dust removal equipment of the embodiment includes externally connecting a high-power induced draft fan to the air outlet of the casing 1, continuously exhausting air outwards to form a negative pressure in the air purification chamber 11, pumping high-temperature dust-containing raw gas into the pre-dust collector 41 from the outlet of the coal gasification furnace 7 under the action of pressure, performing large-particle dust removal treatment, fine-adjusting the temperature of the high-temperature raw gas to below 700 ℃, and allowing the high-temperature raw gas to enter the dust collection chamber 12 from the air inlet of the casing 1.
Under the action of pressure, the gas enters the air purifying chamber 11 through the ceramic fiber filter tube 22 and then is discharged from the air outlet of the casing 1, while the dust particles are blocked outside the ceramic fiber filter tube 22 and gradually form a dust cake on the outer surface of the ceramic fiber filter tube 22.
Under the high-temperature working condition, the clean gas obtained through dust removal treatment is transferred to a waste heat recovery system 8, and heat recovery and utilization are carried out on the high-temperature clean gas, so that the energy-saving benefit of the system is improved; then the clean gas flows to a washing tower 10, the gas is deeply purified and cooled by cooling water again, the temperature of the clean gas reaches normal temperature basically, the treated gas enters a drop catcher 20, liquid drops carried in the gas are caught, and finally the gas is conveyed to a gas using point by a pressurizing machine according to the required pressure for use.
In the dust removal process, dust removal equipment is directly connected with an outlet of a coal gasifier 7, dust entrained by 0.3 mu m of crude coal gas is effectively removed under the working condition of the temperature of 300-700 ℃, the requirement of clean coal gas of 5mg/Nm3 is met by one-time filtration, and the dust removal process has the advantages of strong acid and alkali resistance, small thermal inertia and super long service life of 6-8 years; the problems of pipe blockage, sintering, dust separation after dust separation under 2 mu m and the like in the conventional coal gas production process are directly solved, and the safety production risk of burning and explosion is reduced.
Along with the increase of the working time, the ash cake outside the ceramic fiber filter tube 22 is continuously thickened, the filter resistance is also continuously increased, and a gas pressure sensor arranged in the air purifying chamber 11 detects the pressure in the air purifying chamber 11 in real time and calculates the size of the filter resistance; when the filtering resistance reaches a set value, the air inlet and the air outlet of the machine shell 1 are closed, the control valve 34 is opened, the air in the back-blowing air bag 31 is sprayed out from the purging pipe 33 at a high speed through the air pump, the ceramic fiber filter pipe 22 is subjected to back-blowing ash removal, and ash cakes fall into the bottom of the machine shell 1 under the action of gravity. After the self-cleaning is finished, the control valve 34 is closed, the air inlet and the air outlet of the machine shell 1 are opened, and the high-temperature dust-containing coal gas is continuously cleaned.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. A high-temperature high-efficiency dust removal method for pyrolysis raw gas is characterized by comprising the following steps: the dust removal method comprises the following steps of removing dust by using modular dust removal equipment, wherein the dust removal equipment comprises a machine shell, a high-temperature ceramic filtering system, a high-pressure back flushing system and a pre-dust removal system, the high-temperature ceramic filtering system divides the interior of the machine shell into an independent dust collecting chamber and an independent air purifying chamber, and the high-temperature ceramic filtering system is positioned in the dust collecting chamber and communicates the dust collecting chamber with the air purifying chamber; the high-pressure back-blowing system is arranged in the air purifying chamber and performs back-blowing work towards the dust collecting chamber; the pre-dedusting system is positioned outside the casing, the input end of the pre-dedusting system is communicated with the output end of the coal gasifier, and the output end of the pre-dedusting system is communicated with the dust collecting chamber;
the dust removal method comprises the following steps:
the shell is externally connected with an induced draft device, so that the air purifying chamber forms negative pressure, and the high-temperature dust-containing crude gas is pumped into the pre-dust remover from the outlet of the coal gasifier for preliminary dust removal;
the pre-dedusted crude gas enters a dust collecting chamber, is subjected to fine dedusting by using a ceramic fiber filter tube and enters a gas purifying chamber to obtain high-temperature purified gas;
the high-temperature clean gas is transferred into a washing tower and a drop catcher for deep purification and cooling to finish dust removal;
after long-time work, the ceramic fiber filter tube is subjected to back-blowing ash removal by using a high-pressure back-blowing system.
2. The high-temperature and high-efficiency dust removal method for the pyrolysis raw gas as claimed in claim 1, wherein the method comprises the following steps: in the pre-dedusting process, the temperature of the pre-dedusted crude gas is controlled below 700 ℃ by a temperature control mechanism arranged in the pre-deduster.
3. The high-temperature and high-efficiency dust removal method for the pyrolysis raw gas as claimed in claim 2, wherein the method comprises the following steps: in the pre-dedusting process, the temperature control mode adopts air cooling temperature control.
4. The high-temperature and high-efficiency dust removal method for the pyrolysis raw gas as claimed in claim 1, wherein the method comprises the following steps: in the pre-dedusting process, a gravity deduster is adopted for pre-dedusting treatment.
5. The high-temperature and high-efficiency dust removal method for the pyrolysis raw gas as claimed in claim 1, wherein the method comprises the following steps: in the fine dust removal process, the high temperature in the machine shell is prevented from being transmitted to the high-pressure back flushing system through the temperature control mechanism arranged in the high-pressure back flushing system.
6. The high-temperature and high-efficiency dust removal method for the pyrolysis raw gas as claimed in claim 4, wherein the method comprises the following steps: the temperature control mode of the high-pressure back flushing system adopts water cooling temperature control.
7. The high-temperature and high-efficiency dust removal method for the pyrolysis raw gas as claimed in claim 1, wherein the method comprises the following steps: in the process of back-blowing and dust-cleaning, the gas blown out by the high-pressure back-blowing system is nitrogen.
8. The high-temperature and high-efficiency dust removal method for the pyrolysis raw gas as claimed in claim 1, wherein the method comprises the following steps: in the process of back flushing and ash removing, the high-pressure back flushing system can independently purge any ceramic fiber filter tube.
9. The high-temperature and high-efficiency dust removal method for the pyrolysis raw gas as claimed in claim 1, wherein the method comprises the following steps: and before deep purification and cooling of the high-temperature clean gas, transferring the high-temperature clean gas into a waste heat recovery system for heat recovery.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116716131A (en) * | 2023-08-11 | 2023-09-08 | 浙江百能科技有限公司 | High-efficiency multiple removal system and method for raw gas |
| CN116716131B (en) * | 2023-08-11 | 2023-11-14 | 浙江百能科技有限公司 | High-efficiency multiple removal system and method for raw gas |
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