CN103993111A - Device and method for carrying out dry dehydrochlorination on blast furnace gas - Google Patents
Device and method for carrying out dry dehydrochlorination on blast furnace gas Download PDFInfo
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- CN103993111A CN103993111A CN201410210169.XA CN201410210169A CN103993111A CN 103993111 A CN103993111 A CN 103993111A CN 201410210169 A CN201410210169 A CN 201410210169A CN 103993111 A CN103993111 A CN 103993111A
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Abstract
The invention discloses a device and method for carrying out dry dehydrochlorination on blast furnace gas and belongs to the technical field of blast furnace gas purification. The device for carrying out dry dehydrochlorination on blast furnace gas comprises a gas input mechanism, a dechlorinating mechanism, a detection mechanism and a gas output mechanism, wherein the gas input mechanism is connected with the dechlorinating mechanism; a dechlorinating agent is filled in the dechlorinating mechanism; the gas output mechanism is connected to the dechlorinating mechanism; the detection mechanism is arranged on the gas output mechanism and used for detecting the content of chlorine in gas. By virtue of the device and method for carrying out dry dehydrochlorination on blast furnace gas disclosed by the invention, the corrosion of hydrogen chloride to the blast furnace gas low-pressure section pipeline is solved, the pressure and temperature of dehydrochlorinated and purified blast furnace gas can not be significantly reduced and the heat value of gas is effectively retained.
Description
Technical field
The present invention relates to blast furnace gas purification technical field, particularly a kind of device and method of blast furnace gas dry dehydrochlorination.
Background technology
Blast furnace gas in dry-dedusting system is after sack cleaner purifies, and gas temperature general control, more than 100 ℃, contain hardly water of condensation, so the hydrogenchloride in gas phase is also difficult for separating out into acid in gas line; And when high pressure gas is after reducing valve group or TRT generating, gas temperature, pressure significantly reduce, the hydrogenchloride in coal gas can be dissolved in the water of condensation that tube wall surface separates out, and forms hydrochloric acid.Finally cause the corrosion failure of low-pressure stage coal gas tube wall and corrugated tube, the normal operation that impact is produced.Conventionally take passive anti-corrosion measure, as the insulation of blast furnace gas tube wall anticorrosion with painting material, pipeline external, improve gas line material etc. and all fundamentally do not solve hydrogen-chloride etching problem.Although other looks like to set up the wet methods such as splash tower, except chlorine-hydride method, can remove the hydrogenchloride in coal gas, also correspondingly lose the calorific value of coal gas, the recycling that has reduced blast furnace gas is worth.Formed a large amount of secondary pollution sources such as alkali waste simultaneously, environment has been damaged.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of blast furnace gas low-pressure stage pipeline hydrogen-chloride etching that solved, and blast-furnace gas pressure, the temperature of dehydrochlorination after purifying can significantly not reduce, the calorific value of coal gas obtains the device and method of the blast furnace gas dry dehydrochlorination that effectively retains.
For solving the problems of the technologies described above, the invention provides a kind of device of blast furnace gas dry dehydrochlorination, by described dechlorinating agent, carry out dechlorination; The device of dehydrochlorination comprises: coal gas input mechanism, dechlorination mechanism, feeler mechanism and coal gas output mechanism; Described coal gas input mechanism is connected with described dechlorination mechanism; Described dechlorinating agent is arranged in described dechlorination mechanism; Described coal gas output mechanism is connected with described dechlorination mechanism; Described feeler mechanism is arranged on described coal gas output mechanism, for detection of cl content in described coal gas.
Further, described coal gas input mechanism comprises input channel, coal gas communicating valve and the first relief valve; Described coal gas communicating valve and the first relief valve are separately positioned on described input channel; Described input channel is connected with described dechlorination mechanism; Described coal gas enters described dechlorination mechanism by described coal gas communicating valve and the first relief valve.
Further, described dechlorination mechanism comprises that coal gas enters parts, dechlorination tank, dechlorinating agent input block and dechlorinating agent output block; Described coal gas enters parts and is connected with described input channel; Described coal gas enters parts and is arranged on described dechlorination tank bottom; Described dechlorinating agent input block is arranged on described dechlorination tank top; Described dechlorinating agent output block is arranged on described dechlorination pot bottom; Described dechlorinating agent enters in described dechlorination tank by described dechlorinating agent input block.
Further, described coal gas enters parts and comprises coal gas endless tube and allocate arm into; Described coal gas endless tube and allocate arm into and be arranged on described dechlorination tank below; Described input channel is connected with described coal gas endless tube; Described coal gas endless tube with described in allocate arm into and be connected; Described coal gas endless tube and allocate arm into and be arranged on described dechlorination tank bottom; Described coal gas is by described coal gas endless tube and allocate arm into and enter described dechlorination tank.
Further, described dechlorinating agent input block comprises blow tank and distributor chute; Described blow tank is arranged on described dechlorination tank top; Described distributor chute is arranged in described dechlorination tank; Described blow tank is connected with described distributor chute; Described dechlorinating agent enters in described dechlorination tank by described blow tank and distributor chute.
Further, described dechlorinating agent output block comprises dechlorinating agent blow-off valve; Described dechlorinating agent blow-off valve is to medium-sized blow-off valve; Described dechlorinating agent blow-off valve is arranged on the bottom of described dechlorination tank, for discharging the dechlorinating agent of inefficacy.
Further, described coal gas output mechanism comprises discharge line, discharges gas temperature and pressure monitoring table and flow regulating and controlling valve; Described discharge gas temperature and pressure monitoring table and flow regulating and controlling valve are arranged on described discharge line; Described discharge line is connected with described dechlorination tank, for discharging the coal gas after described dechlorination purifies.
Further, described feeler mechanism comprises cl content detector; Described cl content detector is connected with described discharge line, the cl content of the coal gas after purifying for detection of described dechlorination.
Further, the device of a kind of blast furnace gas dry dehydrochlorination of the present invention also comprises the second relief valve, and described the second relief valve is arranged on described dechlorination tank top, for regulating the reaction pressure in described dechlorination tank.
The present invention also provides a kind of technical scheme solving the problems of the technologies described above as follows: a kind of method of blast furnace gas dry dehydrochlorination comprises the following steps:
Step 1, puts into dechlorinating agent at blow tank; Step 2, dechlorinating agent enters dechlorination tank by distributor chute; Step 3, the communicating valve that turns on the gas-fire, coal gas is entered coal gas endless tube and is allocated into arm by input channel; Step 4, coal gas is by coal gas endless tube and allocate arm into and enter dechlorination tank; Step 5, coal gas carries out dechlorination by dechlorinating agent; Step 6, the coal gas after dechlorination is discharged by discharge line; Step 7, by the flow of flow regulating and controlling valve regulating and controlling coal gas; Step 8, by discharging gas temperature and the monitoring of pressure monitoring table, discharge pressure and the temperature of coal gas; Step 9, the result according to discharging gas temperature and the monitoring of pressure monitoring table, regulates by the first relief valve and the second relief valve; Step 10, is detected and is discharged cl content in coal gas by cl content detector; Step 11, cl content result in the discharge coal gas detecting according to cl content detector, is less than 200ppm if discharge cl content in coal gas, can directly discharge, if the cl content of discharging in coal gas is greater than 200ppm, illustrates that dechlorinating agent lost efficacy; Step 12, if dechlorinating agent lost efficacy, closes coal gas communicating valve, opens dechlorinating agent blow-off valve, discharges inefficacy dechlorinating agent; Step 13, discharges after inefficacy dechlorinating agent, closes dechlorinating agent blow-off valve, by blow tank and distributor chute, in dechlorination tank, inputs dechlorinating agent; Step 14, the communicating valve that turns on the gas-fire, input coal gas, carries out dechlorination.
Coal gas input mechanism provided by the invention is connected with dechlorination mechanism, dechlorinating agent is arranged in dechlorination mechanism, by dechlorinating agent, coal gas being carried out to chlorine takes off, solved the hydrogen-chloride etching of blast furnace gas low-pressure stage pipeline, coal gas output mechanism is connected with dechlorination mechanism, feeler mechanism is arranged on coal gas output mechanism, for detection of cl content in coal gas, according to cl content, whether exceed standard and judge that dechlorinating agent lost efficacy, blast-furnace gas pressure, temperature after dehydrochlorination purifies can significantly not reduce, and the calorific value of coal gas is effectively retained.
Accompanying drawing explanation
The structural representation of the device of the blast furnace gas dry dehydrochlorination that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the dechlorinating agent blow-off valve that Fig. 2 provides for the embodiment of the present invention.
Embodiment
Referring to Fig. 1-2, the embodiment of the present invention provides a kind of coal gas input mechanism, dechlorination mechanism, feeler mechanism and coal gas output mechanism.Coal gas input mechanism is connected with described dechlorination mechanism.Coal gas input mechanism comprises input channel, coal gas communicating valve 1 and the first relief valve 2; Coal gas communicating valve 1 and the first relief valve 2 are separately positioned on input channel; Input channel and the welding of dechlorination mechanism; Coal gas enters described dechlorination mechanism by coal gas communicating valve 1 and the first relief valve 2.Dechlorinating agent 11 is arranged in dechlorination mechanism; Dechlorination mechanism comprises that coal gas enters parts, dechlorination tank 3, dechlorinating agent input block and dechlorinating agent output block.Coal gas enters parts and is connected with described input channel.Dechlorinating agent input block is arranged on described dechlorination tank top.Coal gas enters parts and is arranged on dechlorination tank 3 bottoms.Coal gas enters parts and comprises coal gas endless tube 12 and allocate arm 13 into; Coal gas endless tube 12 and allocate arm 13 into and be arranged on dechlorination tank 3 belows; Input channel and 12 welding of coal gas endless tube; Coal gas endless tube 12 with allocate arm 13 welding into; Coal gas endless tube 12 and allocate arm 13 into and be arranged on dechlorination tank 3 bottoms; Coal gas is by coal gas endless tube 12 and allocate arm 13 into and enter dechlorination tank 3, and coal gas is fully contacted with dechlorinating agent 11.Dechlorinating agent enters in dechlorination tank 3 by dechlorinating agent input block; Dechlorinating agent input block comprises blow tank 8 and distributor chute 9; Blow tank 8 is welded on dechlorination tank 3 tops; Distributor chute 9 is arranged in dechlorination tank 3; Blow tank 8 is connected with distributor chute 9 by bolt; Dechlorinating agent 11 enters in dechlorination tank 3 by blow tank 8 and distributor chute 9.Dechlorinating agent output block is arranged on dechlorination pot bottom; Dechlorinating agent output block comprises dechlorinating agent blow-off valve 14; Dechlorinating agent blow-off valve 14 is to medium-sized blow-off valve; Dechlorinating agent blow-off valve 14 is welded on the bottom of dechlorination tank 3, for discharging the dechlorinating agent 11 of inefficacy.Coal gas output mechanism is connected with dechlorination mechanism.Coal gas output mechanism comprises discharge line 6, discharges gas temperature and pressure monitoring table 7 and flow regulating and controlling valve 5; Discharging gas temperature and pressure monitoring table 7 and flow regulating and controlling valve 5 is arranged on discharge line 6; Discharge line 6 and 3 welding of dechlorination tank, for discharging the coal gas after dechlorination purifies.Feeler mechanism is arranged on coal gas output mechanism, for detection of cl content in coal gas; Feeler mechanism comprises cl content detector 4; Cl content detector 4 is connected with discharge line 6, the cl content of the coal gas after purifying for detection of described dechlorination.The device of blast furnace gas dry dehydrochlorination of the present invention also comprises the second coal gas relief valve 10, and relief valve 10 is arranged on dechlorination tank 3 tops, for regulating the reaction pressure in dechlorination tank 3.
When using the present invention to carry out coal gas dechlorination, comprise the following steps:
Step 1, puts into dechlorinating agent 11 at blow tank 8; Step 2, dechlorinating agent 11 enters dechlorination tank 3 by distributor chute 9; Step 3, the communicating valve 1 that turns on the gas-fire, coal gas is entered coal gas endless tube 12 and is allocated into arm 13 by input channel; Step 4, coal gas is by coal gas endless tube 12 and allocate arm 13 into and enter dechlorination tank 3; Step 5, coal gas carries out dechlorination by dechlorinating agent 11; Step 6, the coal gas after dechlorination is discharged by discharge line 6; Step 7, by the flow of flow regulating and controlling valve 5 regulating and controlling coal gas; Step 8, by discharging gas temperature and the monitoring of pressure monitoring table 7, discharge pressure and the temperature of coal gas; Step 9, the result according to discharging gas temperature and the monitoring of pressure monitoring table 7, regulates by the first relief valve 2 and the second relief valve 10; Step 10, is detected and is discharged cl content in coal gas by cl content detector 4; Step 11, cl content result in the discharge coal gas detecting according to cl content detector 4, is less than 200ppm if discharge cl content in coal gas, can directly discharge, if the cl content of discharging in coal gas is greater than 200ppm, illustrates that dechlorinating agent 11 lost efficacy; Step 12, if dechlorinating agent 11 lost efficacy, closes coal gas communicating valve 1, opens dechlorinating agent blow-off valve 14, discharges inefficacy dechlorinating agent; 11; Step 13, discharges after inefficacy dechlorinating agent 11, closes dechlorinating agent blow-off valve 14, by blow tank 8 and distributor chute 9, in dechlorination tank 3, inputs dechlorinating agent; Step 14, the communicating valve 1 that turns on the gas-fire, input coal gas, carries out dechlorination.
The invention provides a specific embodiment.
Step 1, puts into dechlorinating agent 11 at blow tank 8; Step 2, dechlorinating agent 11 enters dechlorination tank 3 by distributor chute 9; Step 3, the communicating valve 1 that turns on the gas-fire, coal gas is entered coal gas endless tube 12 and is allocated into arm 13 by input channel, by the first relief valve 2 by coal gas pressure regulation to OK range; Step 4, coal gas is by coal gas endless tube 12 and allocate arm 13 four directions into and enter dechlorination tank 3, and coal gas is fully contacted with dechlorinating agent 11; Step 5, coal gas carries out dechlorination by dechlorinating agent 11; Step 6, the coal gas after dechlorination is discharged by discharge line 6; Step 7, by the flow of flow regulating and controlling valve 5 regulating and controlling coal gas; Step 8, by discharging gas temperature and the monitoring of pressure monitoring table 7, discharge pressure and the temperature of coal gas; Step 9, according to the result of discharging gas temperature and the monitoring of pressure monitoring table 7, the reaction pressure regulating in dechlorination tank 3 by the first relief valve 2 and the second relief valve 10; Step 10, is detected and is discharged cl content in coal gas by cl content detector 4; Step 11, cl content result in the discharge coal gas detecting according to cl content detector 4, is less than 200ppm if discharge cl content in coal gas, can directly discharge, if the cl content of discharging in coal gas is greater than 200ppm, illustrates that dechlorinating agent 11 lost efficacy; Step 12, if dechlorinating agent 11 lost efficacy, closes coal gas communicating valve 1, opens dechlorinating agent blow-off valve 14, discharges inefficacy dechlorinating agent 11; Step 13, discharges after inefficacy dechlorinating agent 11, closes dechlorinating agent blow-off valve 14, by blow tank 8 and distributor chute 9, in dechlorination tank 3, inputs dechlorinating agent; Step 14, the communicating valve 1 that turns on the gas-fire, input coal gas, carries out dechlorination.
Coal gas input mechanism provided by the invention is connected with dechlorination mechanism, dechlorinating agent is arranged in dechlorination mechanism, by dechlorinating agent, coal gas is carried out to dechlorination, solved the hydrogen-chloride etching of blast furnace gas low-pressure stage pipeline, coal gas output mechanism is connected with dechlorination mechanism, feeler mechanism is arranged on coal gas output mechanism, for detection of cl content in coal gas, according to cl content, whether exceed standard and judge that dechlorinating agent lost efficacy, blast-furnace gas pressure, temperature after dehydrochlorination purifies can significantly not reduce, and the calorific value of coal gas is effectively retained.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to example, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (10)
1. a device for blast furnace gas dry dehydrochlorination, carries out dechlorination by described dechlorinating agent (11); It is characterized in that, comprising: coal gas input mechanism, dechlorination mechanism, feeler mechanism and coal gas output mechanism; Described coal gas input mechanism is connected with described dechlorination mechanism; Described dechlorinating agent (11) is arranged in described dechlorination mechanism; Described coal gas output mechanism is connected with described dechlorination mechanism; Described feeler mechanism is arranged on described coal gas output mechanism, for detection of cl content in described coal gas.
2. dehydrochlorination device according to claim 1, is characterized in that: described coal gas input mechanism comprises input channel, coal gas communicating valve (1) and the first relief valve (2); Described coal gas communicating valve (1) and the first relief valve (2) are separately positioned on described input channel; Described input channel is connected with described dechlorination mechanism; Described coal gas enters described dechlorination mechanism by described coal gas communicating valve (1) and the first relief valve (2).
3. dehydrochlorination device according to claim 2, is characterized in that: described dechlorination mechanism comprises that coal gas enters parts, dechlorination tank (3), dechlorinating agent input block and dechlorinating agent output block; Described coal gas enters parts and is connected with described input channel; Described coal gas enters parts and is arranged on described dechlorination tank (3) bottom; Described dechlorinating agent input block is arranged on described dechlorination tank (3) top; Described dechlorinating agent output block is arranged on described dechlorination tank (3) bottom; Described dechlorinating agent (11) enters in described dechlorination tank (3) by described dechlorinating agent input block.
4. dehydrochlorination device according to claim 3, is characterized in that: described coal gas enters parts and comprises coal gas endless tube (12) and allocate arm (13) into; Described coal gas endless tube (12) and allocate arm (13) into and be arranged on described dechlorination tank (3) below; Described input channel is connected with described coal gas endless tube (12); Described coal gas endless tube (12) with described in allocate arm (13) into and be connected; Described coal gas endless tube (12) and allocate arm (13) into and be arranged on described dechlorination tank (3) below; Described coal gas is by described coal gas endless tube (12) and allocate arm (13) into and enter described dechlorination tank (3).
5. dehydrochlorination device according to claim 4, is characterized in that: described dechlorinating agent input block comprises blow tank (8) and distributor chute (9); Described blow tank (8) is arranged on described dechlorination tank (3) top; Described distributor chute (9) is arranged in described dechlorination tank (3); Described blow tank (8) is connected with described distributor chute (9); Described dechlorinating agent (11) enters in described dechlorination tank (3) by described blow tank (8) and distributor chute (9).
6. dehydrochlorination device according to claim 5, is characterized in that: described dechlorinating agent output block comprises dechlorinating agent blow-off valve (14); Described dechlorinating agent blow-off valve (14) is to medium-sized blow-off valve; Described dechlorinating agent blow-off valve (14) is arranged on the bottom of described dechlorination tank (3), for discharging the dechlorinating agent (11) of inefficacy.
7. dehydrochlorination device according to claim 6, is characterized in that: described coal gas output mechanism comprises discharge line (6), discharges gas temperature and pressure monitoring table (7) and flow regulating and controlling valve (5); Described discharge gas temperature and pressure monitoring table (7) and flow regulating and controlling valve (5) are arranged on described discharge line (6); Described discharge line (6) is connected with described dechlorination tank (3), for discharging the coal gas after described dechlorination purifies.
8. dehydrochlorination device according to claim 7, is characterized in that: described feeler mechanism comprises cl content detector (4); Described cl content detector (4) is connected with described discharge line (6), the cl content of the coal gas after purifying for detection of described dechlorination.
9. dehydrochlorination device according to claim 7, it is characterized in that, also comprise: the second relief valve (10), described the second relief valve (10) is arranged on described dechlorination tank (3) top, for regulating the reaction pressure in described dechlorination tank (3).
10. a method for blast furnace gas dry dehydrochlorination, is characterized in that, comprising: step 1, at blow tank (8), put into dechlorinating agent (11); Step 2, dechlorinating agent (11) enters dechlorination tank (3) by distributor chute (9); Step 3, the communicating valve that turns on the gas-fire (1), coal gas is entered coal gas endless tube (12) and is allocated into arm (13) by input channel; Step 4, coal gas is by coal gas endless tube (12) and allocate arm (13) into and enter dechlorination tank (3); Step 5, coal gas carries out dechlorination by dechlorinating agent (11); Step 6, the coal gas after dechlorination is discharged by discharge line (6); Step 7, by the flow of flow regulating and controlling valve (5) regulating and controlling coal gas; Step 8, by discharging gas temperature and pressure monitoring table (7) monitoring, discharge pressure and the temperature of coal gas; Step 9, the result according to discharging gas temperature and pressure monitoring table (7) monitoring, regulates by the first relief valve (2) and the second relief valve (10); Step 10, is detected and is discharged cl content in coal gas by cl content detector (4); Step 11, cl content result in the discharge coal gas detecting according to cl content detector (4), is less than 200ppm if discharge cl content in coal gas, can directly discharge, if the cl content of discharging in coal gas is greater than 200ppm, illustrates that dechlorinating agent (11) lost efficacy; Step 12, if dechlorinating agent (11) lost efficacy, closes coal gas communicating valve (1), opens dechlorinating agent blow-off valve (14), discharges inefficacy dechlorinating agent (11); Step 13, discharges after inefficacy dechlorinating agent (11), closes dechlorinating agent blow-off valve (14), by blow tank (8) and distributor chute (9), in dechlorination tank (3), inputs dechlorinating agent; Step 14, the communicating valve that turns on the gas-fire (1), input coal gas, carries out dechlorination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410210169.XA CN103993111B (en) | 2014-05-19 | 2014-05-19 | A kind of device and method of blast furnace gas dry dehydrochlorination |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410210169.XA CN103993111B (en) | 2014-05-19 | 2014-05-19 | A kind of device and method of blast furnace gas dry dehydrochlorination |
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| CN103993111A true CN103993111A (en) | 2014-08-20 |
| CN103993111B CN103993111B (en) | 2016-04-27 |
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| CN104569092A (en) * | 2015-01-22 | 2015-04-29 | 首钢总公司 | Method and device used for detecting chlorine content of blast-furnace gas |
| CN107475474A (en) * | 2017-07-20 | 2017-12-15 | 首钢集团有限公司 | The detecting system and method for chlorinity in a kind of blast furnace gas |
| CN111378801A (en) * | 2020-03-30 | 2020-07-07 | 北京北大先锋科技有限公司 | Process method and device for removing hydrogen chloride by powder injection of blast furnace gas pipeline |
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| CN111378801B (en) * | 2020-03-30 | 2021-06-22 | 北京北大先锋科技有限公司 | Process method and device for removing hydrogen chloride by powder injection of blast furnace gas pipeline |
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| CN103993111B (en) | 2016-04-27 |
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Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee before: Capital Iron & Steel General Company |