CN111363564A - Tar is spraying dust collection system of recycling in advance - Google Patents
Tar is spraying dust collection system of recycling in advance Download PDFInfo
- Publication number
- CN111363564A CN111363564A CN202010271969.8A CN202010271969A CN111363564A CN 111363564 A CN111363564 A CN 111363564A CN 202010271969 A CN202010271969 A CN 202010271969A CN 111363564 A CN111363564 A CN 111363564A
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- CN
- China
- Prior art keywords
- tar
- bag
- spraying
- pulverized coal
- circulating fluidized
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B31/00—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
- B01D46/04—Cleaning filters
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B33/00—Discharging devices; Coke guides
- C10B33/003—Arrangements for pollution-free discharge
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B43/00—Preventing or removing incrustations
- C10B43/02—Removing incrustations
- C10B43/04—Removing incrustations by mechanical means
Abstract
The invention discloses a tar pre-spraying dust removal recycling system, which comprises a pre-spraying system, a circulating fluidization system and a bag-type dust removal system, wherein the system utilizes the pre-spraying system to spray coal ash into a fluidization throat at the lower part of a circulating fluidization tower through a Roots blower and an injection accelerator, the coal ash flows upwards along with flue gas under the driving of the flue gas of a boiler, but part of the coal ash can be in a vertical fluidization state in the fluidization tower under the self-weight condition, the rest of the coal ash is fully adsorbed by the tar of the flue gas of the boiler, so that the tar surface in the flue gas has no viscosity, the pre-sprayed flue gas enters the bag-type dust remover, the tar with the coal ash adsorbed on the surface is collected by the bag-type dust remover, and then the tar is discharged out of the bag-.
Description
Technical Field
The invention belongs to the technical field of environmental protection and dust removal, and relates to a system for recycling dust collected by utilizing tar pre-spraying.
Background
In the coking field, a coke oven can emit a large amount of harmful gas and dust which are high in temperature, high in concentration and easy to diffuse in the coal charging process, the main pollutants are dust, tar and the like, and the pollutants not only pollute the environment, but also harm the health of human bodies. At present, the discharge of a coke oven is treated by a bag-type dust collector, tar viscous substances exist in smoke discharged by the coke oven, the tar can be bonded with a filter bag of the dust collector, in order to avoid the tar from bonding the filter bag, the method adopted at present is to carry out pre-spraying treatment on the filter bag, and the specific technical scheme is to uniformly spray coke powder on the surface of the filter bag in a positive pressure blowing mode before coal charging and dust removal, and to protect the filter bag by using the coke powder so as to prevent the filter bag from being burnt by the tar.
When the method is used, the bag-type dust collector is easy to be blocked and lose efficacy, and the production must be stopped after the bag-type dust collector loses efficacy, so that the working efficiency is reduced; meanwhile, the dust content and the coal tar concentration after purification must be met, the bag-type dust remover has many operation faults, poor dust cleaning effect and difficult maintenance.
Disclosure of Invention
Aiming at the limitation of the bag-type dust removal for treating tar, the invention discloses a tar pre-spraying dust removal recycling system in view of the advantages of pre-spraying, which comprises a pre-spraying system, a circulating fluidization system and a bag-type dust removal system, the system utilizes a pre-spraying system to spray the fly ash into a fluidization throat at the lower part of a circulating fluidization tower through a Roots blower and an injection accelerator, under the drive of the boiler flue gas, the fly ash flows upwards along with the flue gas, but part of the fly ash is in an up-and-down fluidization state in the fluidization tower under the condition of self weight, the rest fly ash is fully adsorbed by the tar of the boiler flue gas, so that the tar surface in the flue gas has no viscosity, the pre-sprayed flue gas enters a bag-type dust remover, the tar with the surface adsorbing the fly ash is collected by the bag-type dust collector and then discharged out of the bag-type dust collector through the discharge opening and the screw conveyer.
The technical scheme of the invention is as follows:
a tar pre-spray dust collection recycling system, comprising:
the ash bin is a cylindrical hollow cylinder, the upper end surface of the ash bin is provided with a pulverized coal inlet, and the lower end surface of the ash bin is provided with a pulverized coal outlet;
the side surface of the bottom of the circulating fluidized tower is provided with a pre-spraying inlet which is communicated with an outlet of the ash bin through a pipeline (6), the lower bottom surface of the circulating fluidized tower is provided with an air inlet pipe for inputting flue gas into the circulating fluidized tower, and the upper end surface of the circulating fluidized tower is provided with an air outlet pipe for outputting a mixture of pulverized coal and the flue gas;
the inlet of the bag-type dust collector is communicated with the gas outlet of the circulating fluidized tower through a pipeline (8), and the bottom surface of the bag-type dust collector is provided with a plurality of discharge openings.
Furthermore, a circulating feed inlet is formed in the side face of the bottom of the circulating fluidized bed and is communicated with a discharge opening of the bag-type dust collector through a pipeline (13).
Furthermore, a dust remover is arranged at the top of the ash bin, and the particle size of the pulverized coal entering the ash bin is less than 30 microns.
Furthermore, a pulverized coal outlet of the ash bin is connected with a pulverized coal discharging pipe, and the discharging pipe is provided with a quantitative feeder and is used for controlling the flow of the output pulverized coal.
Furthermore, a Roots blower is arranged on the pipeline (6) and is used for blowing the pulverized coal into a pre-spraying inlet of the circulating fluidized tower.
Further, an air inlet pipe of the circulating fluidization tower is communicated with the bottom surface of the circulating fluidization tower through a fluidization throat, and the diameter of the fluidization throat is 1/2-1/3 of the diameter of the air inlet pipe.
Further, the bag-type dust collector is provided with at least 3 discharge openings, and the discharge openings are communicated with the screw conveyor and used for discharging materials in the bag-type dust collector.
Furthermore, a three-way flow pipe is arranged at the outlet of the spiral conveyor, and one of the flow pipes of the three-way flow pipe is communicated with the circulating feed inlet.
The invention has the beneficial effects that:
(1) the particle size of the pulverized coal in the ash bin is less than 30 mu m, and the pulverized coal with small particle size is favorable for being uniformly adsorbed on the surface of the pulverized coal, so that the surface of tar is free from viscosity.
(2) Due to the tar after the coal dust is pre-sprayed, the cloth bag is prevented from being invalid due to the fact that the cloth bag is blocked by the tar, the service life of the cloth bag is prolonged, and the cost is saved; the bag-type dust collector reduces the times of replacing the bag, and greatly improves the working efficiency of the bag-type dust collector.
(3) Part of tar passing through the bag-type dust collector returns to the boiler furnace for secondary incineration and reutilization, which is beneficial to energy conservation.
(4) The invention combines the components of pre-spraying, circulating fluidization and cloth bag dust removal into a system, thereby not only solving the dust collection problem of tar and the problem of reducing the dust collection operation cost, but also solving the problem of burning a filter bag, and having high dust removal efficiency and 99 percent PM2.5 removal rate. Has unique superiority in the aspects of dust collection with higher tar viscosity and the like.
Drawings
FIG. 1 is a schematic structural diagram of a tar pre-spraying dust collecting and recycling system of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. The specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. In addition, it should be noted that, for convenience of description, only a part of structures related to the present invention, not all of the structures, are shown in the drawings.
Example 1
A tar pre-spraying dust collection recycling system comprises an ash bin 2, a circulating fluidized tower 7 and a bag-type dust collector 14, wherein coal powder is input to the top of the ash bin, the coal powder and tar smoke are mixed in the circulating fluidized tower, so that the coal powder is adsorbed on the surface of the tar smoke, the surface of the mixed smoke is almost free of viscosity, and then the mixed smoke is filtered by the bag-type dust collector. The ash bin is a cylindrical hollow cylinder, the pulverized coal enters the bin body from the top of the ash bin, the dust remover 1 is arranged at the top of the ash bin, when the pulverized coal is input into the bin body, the pulverized coal particles with the particle size larger than 30 micrometers are filtered, the pulverized coal with the particle size smaller than 30 micrometers enters the bin body from the top of the ash bin, the pulverized coal with the particle size smaller than 30 micrometers can be uniformly distributed in the tower after entering the fluidized tower due to small particles, the pulverized coal is light in weight, and can be fully mixed with boiler flue gas because the particle size of the pulverized coal is small, and the pulverized coal is easily adsorbed on the surface of the flue gas containing tar, so that the tar flue gas loses viscosity. The lower terminal surface in ash bin is provided with conical cylinder, and conical cylinder is favorable to hanging the buggy to the exit, reduces the buggy and hangs on the lateral wall of cylinder, and the terminal surface is opened under the cylinder has the buggy export, is provided with quantitative feeder 3 on buggy outlet pipe, sets up the output quantity of buggy according to the flow of flue gas, and the buggy of output passes through roots's fan 5 and sprays into pipeline 6 with injection accelerator 4. The other end of the pipeline 6 is communicated with a pre-spraying inlet 9 of the circulating fluidization tower.
In this embodiment, the circulating fluidized tower is composed of a main body, an upper tower body and a lower tower body, wherein the upper tower body is a hollow conical cylinder, and the cross section of the upper tower body gradually increases from top to bottom until the cross section of the upper tower body is the same as that of the main body. The main body of the circulating fluidized tower is a hollow cylinder, and the height of the circulating fluidized tower is 2-5 m. The lower tower body is positioned at the lower part of the main body and is a hollow conical cylinder, the cross section of the lower tower body is gradually reduced from top to bottom, the bottom surface of the lower tower body is connected with a fluidization throat pipe 11, the other end of the fluidization throat pipe is connected with an air inlet pipe 12, and the air inlet pipe is used for outputting boiler flue gas into the circulating fluidization tower. The diameter of the fluidization throat pipe is 1/2-1/3 of the diameter of the air inlet pipe, when the flue gas is input to the bottom of the circulating fluidization tower from the air inlet pipe, the flue gas enters the fluidization roating pipe, the pipe diameter is suddenly reduced, and the flow velocity of the flue gas is favorably improved. The side wall of the lower tower body is provided with a pre-spraying inlet 9, pulverized coal is input into the pre-spraying inlet through a pipeline 6, and after the pulverized coal and the flue gas are preliminarily mixed in the lower tower body, the pulverized coal and the flue gas are fully mixed from bottom to top in the circulating fluidized tower. An air outlet pipe 8 is arranged on the top surface of the upper tower body and used for outputting the flue gas after fluidization treatment from the circulating fluidization tower.
The other end of the gas outlet pipe is connected with a bag-type dust remover 14, the tar smoke processed by the coal dust is dedusted by the bag-type dust remover, clean gas is output from a pipeline 20, and a draught fan 18 is arranged on the pipeline 20 and used for pumping the gas out of the bag-type dust remover. The inlet of the bag-type dust collector is communicated with the gas outlet of the circulating fluidized tower through a pipeline (8), and 3 discharge openings are formed in the bottom surface of the bag-type dust collector. The bottom side surface of the annular fluidization tower is provided with a circulating feed inlet 10 which is communicated with a discharge opening of the bag-type dust collector through a pipeline 13. The discharge opening 15 is communicated with a screw conveyer 16 for discharging the materials in the bag-type dust collector. The outlet of the screw conveyer is provided with a three-way flow pipe 17, wherein one flow pipe is communicated with the circulating feed inlet.
The working mode is as follows: the system utilizes the pre-spraying system to spray the fly ash into a fluidization throat at the lower part of a circulating fluidization tower through a Roots blower and a jet accelerator, the fly ash flows upwards along with the flue gas under the driving of the flue gas of a boiler, but part of the fly ash can be in a vertical fluidization state in the fluidization tower under the condition of self weight, the rest fly ash is fully adsorbed by the tar of the flue gas of the boiler, so that the tar surface in the flue gas has no viscosity, the pre-sprayed flue gas enters a bag-type dust remover, the tar with the surface adsorbing the fly ash is collected by the bag-type dust remover, the tar is discharged out of the bag-type dust remover through a discharge opening and a screw conveyor, a three-way dust remover (two ash discharge openings) with a flow pipe is arranged below the dust remover, one is directly discharged out for burying, and the other is returned to a hearth for secondary incineration and reutilization, and switching the three-way flow pipe according to the treatment condition of the flue gas. The system combines the subsystems of pre-spraying, circulating fluidization and bag dust removal into one system, thereby not only solving the dust collection problem of tar and the problem of reducing the dust collection operation cost, but also solving the problem of burning a filter bag, and having high dust removal efficiency and 99 percent PM2.5 removal rate. Has unique superiority in the aspects of dust collection with higher tar viscosity and the like.
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 person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (8)
1. The utility model provides a tar spraying dust collection system of recycling in advance which characterized in that includes:
the ash bin is a cylindrical hollow cylinder, the upper end surface of the ash bin is provided with a pulverized coal inlet, and the lower end surface of the ash bin is provided with a pulverized coal outlet;
the side surface of the bottom of the circulating fluidized tower is provided with a pre-spraying inlet which is communicated with an outlet of the ash bin through a pipeline (6), the lower bottom surface of the circulating fluidized tower is provided with an air inlet pipe for inputting flue gas into the circulating fluidized tower, and the upper end surface of the circulating fluidized tower is provided with an air outlet pipe for outputting a mixture of pulverized coal and the flue gas;
the inlet of the bag-type dust collector is communicated with the gas outlet of the circulating fluidized tower through a pipeline (8), and the bottom surface of the bag-type dust collector is provided with a plurality of discharge openings.
2. The system for recycling dust collected by pre-spraying tar according to claim 1, wherein the bottom side of the circulating fluidized bed is provided with a circulating feed port which is communicated with a discharge port of the bag-type dust collector through a pipeline (13).
3. The tar pre-spraying dust collection and recycling system according to claim 1, wherein a dust collector is arranged at the top of the ash bin, and the particle size of the pulverized coal entering the ash bin is less than 30 μm.
4. The system of claim 1, wherein a pulverized coal outlet of the ash bin is connected to a pulverized coal discharge pipe, and the discharge pipe is provided with a quantitative feeder for controlling the flow of the output pulverized coal.
5. The tar pre-spraying dust collection and recycling system according to claim 1, wherein a roots blower is arranged on the pipeline (6) for blowing pulverized coal into the pre-spraying inlet of the circulating fluidized tower.
6. The system for recycling dust collected by pre-spraying tar according to claim 1, wherein the air inlet pipe of the circulating fluidized tower is communicated with the bottom surface of the circulating fluidized tower through a fluidizing throat, and the diameter of the fluidizing throat is 1/2-1/3 of the diameter of the air inlet pipe.
7. The system of claim 1, wherein the bag-type dust collector has at least 3 discharge openings, and the discharge openings are connected to a screw conveyor for discharging the materials in the bag-type dust collector.
8. The system of claim 7, wherein a three-way flow pipe is arranged at the outlet of the screw conveyor, and one of the flow pipes of the three-way flow pipe is communicated with the circulating feed port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010271969.8A CN111363564A (en) | 2020-04-09 | 2020-04-09 | Tar is spraying dust collection system of recycling in advance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010271969.8A CN111363564A (en) | 2020-04-09 | 2020-04-09 | Tar is spraying dust collection system of recycling in advance |
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| Publication Number | Publication Date |
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| CN111363564A true CN111363564A (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010271969.8A Pending CN111363564A (en) | 2020-04-09 | 2020-04-09 | Tar is spraying dust collection system of recycling in advance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112675698A (en) * | 2020-12-23 | 2021-04-20 | 山东祥桓环境科技有限公司 | Desulfurization, denitrification and dust removal device of turbulent bed in separate bin and process thereof |
| WO2022041926A1 (en) * | 2020-08-27 | 2022-03-03 | 中冶南方都市环保工程技术股份有限公司 | Coke oven flue gas treatment system and method |
| CN114797619A (en) * | 2022-06-20 | 2022-07-29 | 江苏浦士达环保科技股份有限公司 | Compounding device is used in active carbon production |
-
2020
- 2020-04-09 CN CN202010271969.8A patent/CN111363564A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022041926A1 (en) * | 2020-08-27 | 2022-03-03 | 中冶南方都市环保工程技术股份有限公司 | Coke oven flue gas treatment system and method |
| CN112675698A (en) * | 2020-12-23 | 2021-04-20 | 山东祥桓环境科技有限公司 | Desulfurization, denitrification and dust removal device of turbulent bed in separate bin and process thereof |
| CN114797619A (en) * | 2022-06-20 | 2022-07-29 | 江苏浦士达环保科技股份有限公司 | Compounding device is used in active carbon production |
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