CN210001881U - blast furnace gas full-dry purification system - Google Patents
blast furnace gas full-dry purification system Download PDFInfo
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- CN210001881U CN210001881U CN201920636514.4U CN201920636514U CN210001881U CN 210001881 U CN210001881 U CN 210001881U CN 201920636514 U CN201920636514 U CN 201920636514U CN 210001881 U CN210001881 U CN 210001881U
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Abstract
The utility model belongs to the metallurgical industry field relates to blast furnace gas full dry purification system, including the blast furnace, with the blast furnace raw coke oven gas clean system of blast furnace intercommunication, blast furnace raw coke oven gas clean system is connected to the sack cleaner through the raw coke oven gas tube way, the sack cleaner is connected to parallelly connected TRT system and the pressure-reducing valve group that has the muffler through clean coal gas outlet house steward, the back communicates to the clean coal gas pipe network, the clean coal gas outlet department of every sack cleaner is provided with export clean coal gas branch pipe blind plate valve, export clean coal gas branch pipe blind plate valve is provided with export pipeline and coal gas pressure release branch pipe through parallelly connecting, be provided with pressure release coal gas branch pipe butterfly valve on the coal gas pressure release branch pipe, be provided with export clean coal gas branch pipe butterfly valve on the coal gas outlet branch pipe, the coal gas pressure release branch pipe has gathered the gas pressure release house steward, the coal gas pressure release house steward is put through with the clean coal gas pipe network, adopt dense-phase.
Description
Technical Field
The utility model belongs to the field of metallurgical industry, and relates to an blast furnace gas full-dry purification system.
Background
Compared with the original wet dust removal, the dry cloth bag dust removal method has the advantages of no water pollution, low energy consumption, low operating cost and the like; in order to respond to the basic national policy of protecting the environment and saving resources of China, the old small blast furnace is gradually eliminated, and the small blast furnace is newly built and expanded into a large and medium blast furnace; meanwhile, the bag-type dust removal system is taken as a preferred scheme for removing dust from blast furnace gas, and the existing dry-method bag-type dust removal scheme has the problems of high nitrogen consumption due to nitrogen pulse back blowing, high power consumption due to net gas pressurization back blowing, unclean net gas back blowing and hardening of bags under special working conditions, high consumption of dilute-phase ash conveying nitrogen, serious abrasion of ash conveying pipelines and the like.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing blast furnace gas full dry purification systems who has reduced the demand that sack dust removal technique used to nitrogen gas, reduces ash conveying pipeline wearing and tearing, saves running cost.
In order to achieve the purpose, the utility model provides a blast furnace gas full-dry purification system, including the blast furnace, the blast furnace raw gas purification system that communicates with the blast furnace, blast furnace raw gas purification system is connected to a plurality of sack cleaners through the raw gas pipeline, the sack cleaner is connected to TRT system and the pressure reducing valve group that has the muffler that connects in parallel through clean gas outlet house steward, after communicate to clean gas pipe network, the clean gas outlet department of each sack cleaner is provided with export clean gas branch pipe blind valve, export clean gas branch pipe blind valve is through parallelly connected clean gas outlet branch pipe and the gas pressure release branch pipe of being provided with, be provided with pressure release gas branch pipe butterfly valve on the gas pressure release branch pipe, be provided with export clean gas outlet branch pipe butterfly valve on the clean gas outlet branch pipe, clean gas outlet branch pipe gathers to clean gas outlet house steward, the gas pressure release house steward has the gas pressure release house steward, the gas pressure release house.
Optionally, a pressure relief gas main pipe regulating valve for controlling the pressure released by the bag-type dust remover is arranged on the gas pressure relief main pipe, and a pressure relief gas main pipe blind plate valve and a pressure relief gas main pipe butterfly valve are arranged on the gas pressure relief main pipe.
Optionally, a nitrogen pulse back-flushing valve is arranged on each bag-type dust collector, and a bag-type dust collector safety pressure relief and release valve, an inlet raw gas branch pipe butterfly valve and an inlet raw gas branch pipe blind plate valve are arranged at the top of each bag-type dust collector.
Optionally, a bin pump used in cooperation with the bag-type dust remover is arranged below each bag-type dust remover, and the bin pump is communicated with the ash conveying pipeline and then connected to the ash tank after being gathered.
Optionally, a bin pump ash conveying valve is arranged on the bin pump, a bin pump inlet valve, a bag-type dust remover ash discharging cut-off valve and a bin pump pressure release valve are arranged between the bin pump and the bag-type dust remover, a bin pump outlet valve is arranged at the bottom of the bin pump, and the bin pump outlet valve is connected with the ash conveying pipeline.
Optionally, an ash tank blow-off valve is arranged at the top of the ash tank, and ash tank ash unloading equipment is arranged at the bottom of the ash tank.
Optionally, a pressure sensor for monitoring the pressure of the raw gas and a temperature sensor for monitoring the temperature of the raw gas are arranged at the inlet of the raw gas pipeline.
The beneficial effects of the utility model reside in that:
1. the utility model discloses every sack cleaner clean gas export is through behind public blind plate valves, through setting up the parallelly connected coal gas pressure release branch pipe with clean gas outlet branch pipe, and establish switching butterfly valve with coal gas pressure release branch pipe at clean gas outlet branch pipe, need not newly open the hole on the dust remover barrel, practice thrift pressure release pipeline branch pipe blind plate valves simultaneously, establish pressure release gas house steward blind plate valve and pressure release gas house steward butterfly valve on the coal gas pressure release house steward, steerable sack cleaner discharge pressure to setting value, guarantee dust removal effect, and when maintaining the TRT generated energy, also reduced the wearing and tearing to the sack, to the dry process dust pelletizing system who has adopted nitrogen pulse blowback mode, the transformation measure is simple.
2. The utility model discloses select high-pressure clean coal gas for use as blowback deashing medium during normal production, during the special production condition, manual switching nitrogen gas is as pulse blowback deashing medium, and defeated ash adopts the storehouse pump of high ash gas ratio to carry out dense phase defeated ash, and this system has reduced the demand that sack dust removal technology used to nitrogen gas, reduces defeated ash pipeline wearing and tearing, saves the running cost, can use newly-built or the transformation project at big-and-middle-sized blast furnace gas full dry purification system.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.
Drawings
For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic diagram of an blast furnace gas full-dry purification system of the present invention.
Reference numerals: a blast furnace 1, a blast furnace raw gas purification system 2, a bag-type dust collector 3, an ash tank 4, a bin pump 5, a TRT system 6, a pressure reducing valve bank 7, a silencer 8, a clean gas pipe network 9, an inlet raw gas branch pipe butterfly valve 10, an inlet raw gas branch pipe blind plate valve 11, an outlet clean gas branch pipe blind plate valve 12, an outlet clean gas branch pipe butterfly valve 13, a pressure relief gas branch pipe butterfly valve 14, a pressure relief gas main pipe regulating valve 15 and a pressure relief gas main pipe blind plate valve 16, a butterfly valve 17 of a pressure relief gas main pipe, a safety pressure relief and relief valve 18 of a bag-type dust collector, an ash tank relief valve 19, a pulse back-flushing valve 20, an ash discharge cut-off valve 21 of the bag-type dust collector, a bin pump inlet valve 22, a bin pump outlet valve 23, a bin pump pressure relief valve 24, a bin pump ash conveying valve 25, an ash conveying pipeline 26, ash tank ash discharge equipment 27, a crude gas pipeline 28, a gas pressure relief branch pipe 29, a clean gas outlet branch pipe 30, a gas pressure relief main pipe 31 and a clean gas outlet main pipe 32.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
Referring to fig. 1, blast furnace gas full-dry purification systems comprise a blast furnace 1, a blast furnace crude gas purification system 2 communicated with the blast furnace 1, the blast furnace crude gas purification system 2 is connected to a plurality of bag-type dust collectors 3 through crude gas pipelines 28, the bag-type dust collectors 3 are connected to a TRT system 6 and a pressure reducing valve bank 7 with a silencer 8 in parallel through a clean gas outlet main pipe 32 and then communicated to a clean gas pipe network 9, an outlet clean gas branch pipe blind valve 12 is arranged at a clean gas outlet of each bag-type dust collector 3, the outlet clean gas branch pipe blind valve 12 is provided with a clean gas outlet branch pipe 30 and a gas pressure reducing branch pipe 29 in parallel, the gas pressure reducing branch pipe 29 is provided with a pressure reducing gas branch butterfly valve 14, the clean gas outlet branch pipe 30 is provided with an outlet clean gas branch pipe butterfly valve 13, the clean gas outlet branch pipe 30 is gathered to the clean gas outlet main pipe 32, the gas branch pipes 29 are gathered to a gas main pipe 31, the gas pressure reducing main pipe 31 is communicated with the clean gas pipe network 9, the gas main pipe 31 is provided with a pressure reducing valve 15 for controlling the pressure of the bag-type dust collectors 3.
In this embodiment, each bag-type dust collector 3 is provided with a nitrogen pulse blowback valve 20, and the top is provided with a bag-type dust collector safety pressure relief and release valve 18, an inlet raw gas branch pipe butterfly valve 10 and an inlet raw gas branch pipe blind plate valve 11.
In this embodiment, every 3 below of sack cleaner are provided with the storehouse pump 5 with the supporting use of sack cleaner 3, be provided with storehouse pump ash conveying valve 25 on the storehouse pump 5, be provided with storehouse pump inlet valve 22 between storehouse pump 5 and the sack cleaner 3, sack cleaner unloads grey trip valve 21 and storehouse pump relief valve 24, the bottom of storehouse pump 5 is provided with storehouse pump outlet valve 23, storehouse pump outlet valve 23 is connected with defeated grey pipeline 26, storehouse pump 5 intercommunication defeated grey pipeline 26 gathers the back and is connected to ash can 4, ash can 4 top is provided with ash can blow-off valve 19, ash can 4 bottom is provided with ash can and unloads grey equipment 27.
In this embodiment, a pressure sensor for monitoring the pressure of the raw gas and a temperature sensor for monitoring the temperature of the raw gas are disposed at the inlet of the raw gas pipeline 28.
process flow suitable for blast furnace gas full dry purification system, comprising the following steps:
s1: gas dust removal process
Generating high-temperature, high-pressure and dust-containing raw gas from a blast furnace 1, primarily dedusting the raw gas by a raw gas purification system 2 of the blast furnace 1, then sending the raw gas to a bag-type dust remover 3, opening an inlet raw gas branch pipe butterfly valve 10 and an outlet clean gas branch pipe butterfly valve 13, reducing the dust content of the raw gas to be less than 5mg/Nm3 after the raw gas passes through the bag-type dust remover 3, then reducing the pressure of the clean gas to be about 12kPa by a pressure reducing valve bank 7 with a silencer 8 or a TRT system 6, and then externally sending the clean gas to a clean gas pipe network 9;
s2: back-blowing ash cleaning process
Determining a back-blowing medium according to different working conditions of the blast furnace 1 coal gas:
(1) the blast furnace 1 normally operates, and when the temperature sensor detects that the temperature of the raw gas exceeds the dew point temperature by more than 20 ℃ and the pressure sensor detects that the pressure of the raw gas is higher than 0.1MPa, clean gas is selected as a back flushing medium;
the bag-type dust remover 3 barrel needing back flushing is taken out of the dust removal process, an inlet crude gas branch butterfly valve 10 and an outlet clean gas branch butterfly valve 13 are closed, a pressure relief gas branch butterfly valve 14 is opened, the pressure of the gas in the bag-type dust remover 3 barrel is reduced to a set value through a pressure relief gas main pipe regulating valve 15, the pressure in the bag-type dust remover 3 barrel is smaller than the pressure in a clean gas outlet main pipe 32, the pressure relief gas branch butterfly valve 14 is closed, the outlet clean gas branch butterfly valve 13 is opened, the bag-type dust remover 3 barrel is back flushed by utilizing the high-pressure clean gas in the clean gas outlet main pipe 32 before a pressure relief valve group 7, and finally the pressure in the bag-type dust remover 3 barrel is equal to the pressure in the clean gas outlet main pipe 32 before the pressure relief valve group 7, so that;
(2) when the temperature of the clean gas is too low, the possibility of cloth bag hardening is increased by gas back flushing, and when the pressure of the furnace top is lower, the back flushing pressure difference of the gas is small, and the back flushing effect is poor, so when the temperature sensor detects that the temperature of the raw gas is less than or equal to 20 ℃ of the dew point temperature of the raw gas, or the pressure sensor detects that the pressure of the raw gas is less than or equal to 0.1MPa, nitrogen is selected as a back flushing medium;
the bag-type dust collector 3 cylinder needing back flushing deviates from the dust collection process, close the inlet raw gas branch butterfly valve 10 and the outlet clean gas branch butterfly valve 13, open the nitrogen pulse back flushing valve 20 to carry out the back flushing of nitrogen, after the back flushing is finished, close the nitrogen pulse back flushing valve 20, open the inlet raw gas branch butterfly valve 10 and the outlet clean gas branch butterfly valve 13, and the bag-type dust collector 3 cylinder returns to the dust collection process;
when the conditions allow, the nitrogen pulse back flushing can be directly carried out without removing the dust removal process;
s3: 3 ash discharging and conveying process of bag-type dust collector
When the ash deposition at the bottom of the bag-type dust collector 3 reaches the preset height or reaches the designed ash cleaning interval time, opening the bin pump pressure release valve 24 to enable the pressure in the barrel of the bag-type dust collector 3 to be equal to the pressure of the bin pump 5, opening the inlet valve 22 of the bin pump to start ash discharge until the bin pump 5 reaches the preset high ash level, and closing the inlet valve 22 of the bin pump and the bin pump pressure release valve 24;
opening a bin pump ash conveying valve 25 and a bin pump outlet valve 23, conveying ash to an ash tank 4 through an ash conveying pipeline 26 by adopting a dense phase ash conveying mode with an ash-to-air ratio of more than 35kg (ash)/1 kg (air) until the bin pump 5 completely discharges the ash, and then closing the bin pump ash conveying valve 25 and the bin pump outlet valve 23;
the barrel of the bag-type dust collector 3 returns to the dust collection process;
s4: ash can 4 ash unloading process
When the ash level of the ash tank 4 is prompted to be high or reaches an artificial set value, the ash tank ash unloading device 27 is opened to unload ash.
In the present embodiment, in step S1, the bin pump inlet valve 22, the bin pump outlet valve 23, the bin pump pressure relief valve 24, the bin pump ash conveying valve 25, and the ash tank ash discharge device 27 are kept in the closed state.
In this embodiment, in step S3, the medium of the gas source is nitrogen.
The utility model discloses every sack cleaner clean gas export is through behind public blind plate valves, through setting up the parallelly connected coal gas pressure release branch pipe with clean gas outlet branch pipe, and establish switching butterfly valve with coal gas pressure release branch pipe at clean gas outlet branch pipe, need not newly open the hole on the dust remover barrel, practice thrift pressure release pipeline branch pipe blind plate valves simultaneously, establish pressure release gas house steward blind plate valve and pressure release gas house steward butterfly valve on the coal gas pressure release house steward, steerable sack cleaner discharge pressure to setting value, guarantee dust removal effect, and when maintaining the TRT generated energy, also reduced the wearing and tearing to the sack, to the dry process dust pelletizing system who has adopted nitrogen pulse blowback mode, the transformation measure is simple.
The utility model selects high-pressure clean gas as back-blowing deashing medium during normal production; when the production conditions are special, the nitrogen is manually switched to be used as a pulse back-blowing ash removal medium; conveying ash by adopting a bin pump with high ash-gas ratio to carry out dense-phase ash conveying; the system reduces the requirement of a bag-type dust removal technology on the use of nitrogen, reduces the abrasion of an ash conveying pipeline and saves the operation cost; can be applied to the new construction or the reconstruction project of a large and medium blast furnace gas full dry purification system.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (7)
- The blast furnace gas full-dry purification system comprises a blast furnace and a blast furnace raw gas purification system communicated with the blast furnace, wherein the blast furnace raw gas purification system is connected to a plurality of bag-type dust collectors through raw gas pipelines, the bag-type dust collectors are connected to a TRT system and a pressure reducing valve group with a silencer in parallel through a raw gas outlet main pipe and then communicated to a clean gas pipe network.
- 2. The kinds of blast furnace gas full dry purification system according to claim 1, wherein the gas pressure relief main pipe is provided with a pressure relief gas main pipe regulating valve for controlling the pressure of the bag-type dust remover, and the gas pressure relief main pipe is provided with a pressure relief gas main pipe blind valve and a pressure relief gas main pipe butterfly valve.
- 3. The kinds of blast furnace gas full dry purification system according to claim 1, wherein each bag-type dust collector is provided with a nitrogen pulse blowback valve, and the top of each bag-type dust collector is provided with a bag-type dust collector safety pressure relief and blow-off valve, an inlet raw gas branch butterfly valve and an inlet raw gas branch blind valve.
- 4. The kinds of blast furnace gas full dry purification system according to claim 1, wherein a bin pump used in cooperation with the bag-type dust remover is arranged below each bag-type dust remover, and the bin pump is connected to the ash tank after being communicated with the ash conveying pipeline and collected.
- 5. The blast furnace gas full dry purification system according to claim 4, wherein a bin pump ash conveying valve is arranged on the bin pump, a bin pump inlet valve, a bag-type dust remover ash discharge cutoff valve and a bin pump pressure release valve are arranged between the bin pump and the bag-type dust remover, a bin pump outlet valve is arranged at the bottom of the bin pump, and the bin pump outlet valve is connected with an ash conveying pipeline.
- 6. The blast furnace gas full dry purification system according to claim 4, wherein an ash can blow-off valve is arranged on the top of the ash can, and an ash can unloading device is arranged on the bottom of the ash can.
- 7. The blast furnace gas full dry purification system according to claim 1, wherein a pressure sensor for monitoring the pressure of the raw gas and a temperature sensor for monitoring the temperature of the raw gas are arranged at the inlet of the raw gas pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920636514.4U CN210001881U (en) | 2019-05-06 | 2019-05-06 | blast furnace gas full-dry purification system |
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| CN201920636514.4U CN210001881U (en) | 2019-05-06 | 2019-05-06 | blast furnace gas full-dry purification system |
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| CN210001881U true CN210001881U (en) | 2020-01-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110016530A (en) * | 2019-05-06 | 2019-07-16 | 中冶赛迪工程技术股份有限公司 | A kind of blast furnace gas all dry purification system and its process flow |
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2019
- 2019-05-06 CN CN201920636514.4U patent/CN210001881U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110016530A (en) * | 2019-05-06 | 2019-07-16 | 中冶赛迪工程技术股份有限公司 | A kind of blast furnace gas all dry purification system and its process flow |
| CN110016530B (en) * | 2019-05-06 | 2024-02-23 | 中冶赛迪工程技术股份有限公司 | Blast furnace gas full-dry purification system and process flow thereof |
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