CN203569127U - Blast furnace gas alkali spraying and dechlorination device - Google Patents

Blast furnace gas alkali spraying and dechlorination device Download PDF

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Publication number
CN203569127U
CN203569127U CN201320783605.3U CN201320783605U CN203569127U CN 203569127 U CN203569127 U CN 203569127U CN 201320783605 U CN201320783605 U CN 201320783605U CN 203569127 U CN203569127 U CN 203569127U
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China
Prior art keywords
spray
spraying
dechlorination
alkali
washing tower
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CN201320783605.3U
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Inventor
牛得草
张传波
李冬梅
董艳萍
刘红娟
李巍
杜英春
王建华
柴凤飞
王世芹
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BEIJING JINGCHENG ZEYU ENERGY ENVIRONMENTAL PROTECTION ENGINEERING TECHNOLOGY Co Ltd
MCC Capital Engineering and Research Incorporation Ltd
Zhongye Jingcheng Engineering Technology Co Ltd
Original Assignee
BEIJING JINGCHENG ZEYU ENERGY ENVIRONMENTAL PROTECTION ENGINEERING TECHNOLOGY Co Ltd
Zhongye Jingcheng Engineering Technology Co Ltd
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Abstract

The utility model relates to a blast furnace gas alkali spraying and dechlorination device. The alkali spraying and dechlorination device comprises an alkali spraying tower; the lower end of the alkali spraying tower is provided with a cone bucket; the bottom of the cone bucket is provided with a drainage device; the side wall of the lower part of the alkali spraying tower is provided with a gas inlet; the top of the alkali spraying tower is provided with a gas outlet; the gas outlet is connected with a gas outlet pipeline; an alkali spraying device, a water spraying device and a packing dehydration device are sequentially arranged at intervals inside the alkali spraying tower and above the gas inlet from bottom to top; the gas inlet is connected with a gas inlet pipeline; and a mist spraying device is arranged in the gas inlet pipeline. Before entering the alkali spraying tower, coal gas is firstly subjected to water mist spraying humidification and temperature reduction in the gas inlet pipeline; moisture in the coal gas subjected to mist spraying is in a saturated mode; and the coal gas enters the alkali spraying tower from the gas inlet of the alkali spraying tower, gas flow firstly passes through the first layer of alkali spraying device to carry out alkali spraying neutralizing treatment from bottom to top, and the coal gas is humidified and cooled before, and thus, an acid medium in the coal gas can be rapidly and efficiently removed and a better acid-base neutralization effect is achieved.

Description

Blast-furnace gas alkali spraying dechlorination device
Technical field
The utility model is about a kind of blast-furnace gas alkali spraying dechlorination device, relates in particular to a kind of blast-furnace gas alkali spraying dechlorination device for the treatment of a large amount of acidic mediums (being mainly chlorion) in blast furnace gas after all dry-type dedusting.
Background technology
In recent years, domestic iron and steel enterprises blast furnace gas fully-dried type dust settling pocket technique has obtained large-scale popularization, owing to not considering after dry method dust removing of acidic medium in coal gas, can be after the certain hour a large amount of enrichments of acidic medium in coal gas, thereby cause the series of problems such as corrosion of low temperature blast furnace gas pipeline, pipeline compensator and subsequent technique equipment, shortened the work-ing life of blast furnace gas auxiliary facility.
Along with the application gradually of dry type coal gas dust removal technology, in coal gas, the etching problem of acidic medium also causes domestic colleague's attention gradually.Domestic-developed had gone out blast-furnace gas alkali spraying dechlorination device in recent years, but carried out because spray alkali dechlorination only concentrates in spray washing tower (for removing CO2), and the layout Shortcomings of spray gun simultaneously causes spraying washing tower (for removing CO2) equipment volume large, and injection flow rate is larger, and power consumption is large; In addition, the spray alkali neutralizing treatment effect of blast furnace gas also need to improve.
Thus, the inventor, by means of being engaged in experience and the practice of relevant industries for many years, proposes a kind of blast-furnace gas alkali spraying dechlorination device, to overcome the defect of prior art.
Utility model content
The purpose of this utility model is to provide a kind of blast-furnace gas alkali spraying dechlorination device, can reach and better wash chlorine, cooling-down effect.
Another object of the present utility model is to provide a kind of blast-furnace gas alkali spraying dechlorination device, optimize the layout of spray alkali and water spray layer spray gun, can more effectively remove the acidic medium in blast furnace gas, reduce injection flow rate, save power consumption, make the PH of water of condensation in blast furnace gas be controlled at 7~8, reach the service requirements of subsequent user.
The purpose of this utility model is achieved in that a kind of blast-furnace gas alkali spraying dechlorination device, and this spray alkali dechlorination device includes spray washing tower (for removing CO2), and spray washing tower (for removing CO2) lower end is provided with cone bucket, and cone bucket bottom is provided with water-freeing arrangement; The sidewall of spray washing tower (for removing CO2) bottom is provided with inlet mouth, and spray washing tower (for removing CO2) top is provided with air outlet, and this air outlet is connected with outlet pipe; Inner and be positioned at inlet mouth upside and be sequentially interval with from bottom to top spray alkali device, waterworks and filler dewatering unit at spray washing tower (for removing CO2); Described inlet mouth is connected with intake ducting, is provided with spraying plant in intake ducting.
In a better embodiment of the present utility model, described spray alkali device, waterworks consist of a plurality of spray guns around spray washing tower (for removing CO2) sidewall respectively, and by spraying, sidewall is run through in washing tower (for removing CO2) outside to described each spray gun and sensing spray washing tower (for removing CO2) center arranges.
In a better embodiment of the present utility model, described spray gun comprises a plurality of short spray guns, a plurality of long spray gun and a plurality of middle length spray gun.
In a better embodiment of the present utility model, described a plurality of short spray guns, a plurality of long spray gun and a plurality of middle length spray gun are uniformly distributed around spray washing tower (for removing CO2) sidewall respectively.
In a better embodiment of the present utility model, described spray gun arranges a plurality of nozzles downwards.
In a better embodiment of the present utility model, above described filler dewatering unit, be also provided with filler flushing arrangement.
In a better embodiment of the present utility model, described filler flushing arrangement consists of annular spray gun.
In a better embodiment of the present utility model, on described outlet pipe and the position of closing on air outlet be provided with diffusion valve.
In a better embodiment of the present utility model, below described spray washing tower (for removing CO2), be provided with pond.
From the above mentioned, the utility model blast-furnace gas alkali spraying dechlorination device, in intake ducting, increased spraying plant, before entering to spray washing tower (for removing CO2), add wet gas and reduce gas temperature, not only for the spray alkali operation in tower, creating better condition, also can reduce the spray water loss in spray washing tower (for removing CO2), can save compared to existing technology 35% water loss, also reduced the operation of feeding spraying pump group, thereby reached the object of economize on electricity, compared with prior art can economize on electricity 30% simultaneously; The utility model has been adjusted and has first been sprayed water and spray afterwards the order of work of alkali in existing apparatus, and the workflow of change first atomized water spray into, spraying again alkali, rear water spray thus, can reach and better wash chlorine, cooling-down effect; The utility model has been optimized the layout of spray alkali and water spray layer spray gun, adopt intracardiac being periphery in the shower nozzle of some long spray guns to put, be periphery in the shower nozzle of middle length spray gun and put optimization " three rings " arrangement form of arranging with the shower nozzle outer shroud of short spray gun, can more effectively remove the acidic medium in blast furnace gas, the device diameters and the height that have reduced spray washing tower (for removing CO2), outfit of equipment weight reduces 10%; Coal gas after processing by the utility model blast-furnace gas alkali spraying dechlorination device, water of condensation pH value is controlled at 7~8 the most at last, has reached the service requirements of subsequent user.
Accompanying drawing explanation
The following drawings is only intended to the utility model to schematically illustrate and explain, does not limit scope of the present utility model.Wherein:
Fig. 1: be the structural representation of the utility model blast-furnace gas alkali spraying dechlorination device.
Fig. 2: for the inner spray gun of spray washing tower (for removing CO2) of the present utility model is arranged schematic diagram.
Embodiment
For technical characterictic of the present utility model, object and effect being had more clearly, understand, now contrast accompanying drawing embodiment of the present utility model is described.
As shown in Figure 1 and Figure 2, the utility model proposes a kind of blast-furnace gas alkali spraying dechlorination device 100, this spray alkali dechlorination device 100 includes spray washing tower (for removing CO2) 1, and spray washing tower (for removing CO2) 1 lower end is provided with cone bucket 8, and cone bucket bottom is provided with water-freeing arrangement 81; The sidewall of spray washing tower (for removing CO2) 1 bottom is provided with inlet mouth 11, and spray washing tower (for removing CO2) top is provided with air outlet 12, and this air outlet 12 is connected with outlet pipe 121; Inner and be positioned at inlet mouth 11 upsides and be sequentially interval with from bottom to top spray alkali device 2, waterworks 3 and filler dewatering unit 4 at spray washing tower (for removing CO2) 1; Described inlet mouth 11 is connected with intake ducting 111, is provided with spraying plant 5 in intake ducting 111.
From the above mentioned, coal gas is interior first through spraying (water smoke) device 5 humidifications, cooling at intake ducting 111 before entering spray washing tower (for removing CO2) 1, and in the coal gas after spraying, moisture is in state of saturation; Coal gas enters in spray washing tower (for removing CO2) from spray washing tower (for removing CO2) inlet mouth 11, air-flow from below to up, first through 2 pairs of coal gas of the first layer spray alkali device, spray alkali neutralizing treatment, due to humidification, cooling before coal gas, can remove quickly and efficiently like this acidic medium (chlorion and part of sulfuric acid radical ion) in coal gas, reach better acid-base neutralisation effect.
In the present embodiment, for guaranteeing the effect of spray alkali, high alkali liquid need carry out mixing match dilution with soft water.Coal gas through the neutralization of spray alkali passes through second layer waterworks 3 immediately, and this water spray process not only can fully reduce the temperature of coal gas, can also absorb part acid-base neutralisation drop in coal gas simultaneously.In the present embodiment, below described spray washing tower (for removing CO2) 1, be provided with pond 9; Second layer waterworks 3 can utilize the bottom draining of spray washing tower (for removing CO2) to recycle, and regularly processes, and has greatly improved the repeating utilization factor of service water, has reduced water consumption simultaneously.
For guaranteeing spraying effect and the area coverage of the first layer spray alkali device 2 and 3 liang of bed devices of second layer waterworks, spray Bu Liu dead angle, cross section, the spray gun on described spray equipment is arranged need be more even.In the present embodiment, described spray alkali device 2, waterworks 3 consist of a plurality of spray guns 6 around spray washing tower (for removing CO2) 1 sidewall respectively, and described each spray gun 6 runs through sidewall by spray washing tower (for removing CO2) 1 outside and sensing spray washing tower (for removing CO2) 1 center arranges.As shown in Figure 2, described spray gun 6 comprises a plurality of short spray guns 61, a plurality of long spray gun 62 and a plurality of middle length spray gun 63; Described a plurality of short spray gun 61, a plurality of long spray gun 62 and a plurality of middle length spray gun 63 are uniformly distributed around spray washing tower (for removing CO2) 1 sidewall respectively.As shown in Figure 2, every layer of spray gun arranges that in the shower nozzle that all adopts some long spray guns 62, intracardiac being periphery put, is periphery in the shower nozzle of middle length spray gun 63 and puts optimization " three rings " arrangement form of arranging with the shower nozzle outer shroud of short spray gun 61, and the spray gun of spray alkali device and waterworks is arranged identical.Described spray gun arranges a plurality of nozzles downwards.
Coal gas is after two-layer spray, and in gas, mechanical water content is higher, need to carry out processed to coal gas.As shown in Figure 1, from the bottom up, by filler dewatering unit 4, the little water droplet in coal gas, after filler for flower ring, pools macrobead and utilizes gravity principle to dewater coal gas.
In the present embodiment, above described filler dewatering unit 4, be also provided with filler flushing arrangement 7; Described filler flushing arrangement 7 consists of annular spray gun.Be mainly taking into account system long-play, the easy fouling of filler is stopped up, and causes system pressure loss excessive, needs regularly with high pressure water, to carry out spray irrigation.
On spray washing tower (for removing CO2) 1 top outlet pipe 121 and the position of closing on air outlet 12 be provided with diffusion valve 122; When gas pressure is too high, automatically opens and diffuse; During standard atmosphere pressure, in closing condition.Be mainly that coal gas is scurried out from the water-freeing arrangement 81 of spray washing tower (for removing CO2) bottom when preventing high pressure, occur security incident.
The utility model blast-furnace gas alkali spraying dechlorination device, in intake ducting, increased spraying plant, before entering to spray washing tower (for removing CO2), add wet gas and reduce gas temperature, not only for the spray alkali operation in tower is created better condition, also can reduce the spray water loss in spray washing tower (for removing CO2), can save compared to existing technology 35% water loss, also reduce the operation of feeding spraying pump group simultaneously, thereby reach the object of economize on electricity, compared with prior art can economize on electricity 30%; The utility model has been adjusted and has first been sprayed water and spray afterwards the order of work of alkali in existing apparatus, and the workflow of change first atomized water spray into, spraying again alkali, rear water spray thus, can reach and better wash chlorine, cooling-down effect; The utility model has been optimized the layout of spray alkali and water spray layer spray gun, adopt intracardiac being periphery in the shower nozzle of some long spray guns to put, be periphery in the shower nozzle of middle length spray gun and put optimization " three rings " arrangement form of arranging with the shower nozzle outer shroud of short spray gun, can more effectively remove the acidic medium in blast furnace gas, the device diameters and the height that have reduced spray washing tower (for removing CO2), outfit of equipment weight reduces 10%; Coal gas after processing by the utility model blast-furnace gas alkali spraying dechlorination device, water of condensation pH value is controlled at 7~8 the most at last, has reached the service requirements of subsequent user.
The foregoing is only the schematic embodiment of the utility model, not in order to limit scope of the present utility model.Any those skilled in the art, is not departing from equivalent variations and the modification of having done under the prerequisite of design of the present utility model and principle, all should belong to the scope of the utility model protection.

Claims (9)

1. a blast-furnace gas alkali spraying dechlorination device, this spray alkali dechlorination device includes spray washing tower (for removing CO2), and spray washing tower (for removing CO2) lower end is provided with cone bucket, and cone bucket bottom is provided with water-freeing arrangement; The sidewall of spray washing tower (for removing CO2) bottom is provided with inlet mouth, and spray washing tower (for removing CO2) top is provided with air outlet, and this air outlet is connected with outlet pipe; It is characterized in that: inner and be positioned at inlet mouth upside and be sequentially interval with from bottom to top spray alkali device, waterworks and filler dewatering unit at spray washing tower (for removing CO2); Described inlet mouth is connected with intake ducting, is provided with spraying plant in intake ducting.
2. blast-furnace gas alkali spraying dechlorination device as claimed in claim 1, it is characterized in that: described spray alkali device, waterworks consist of a plurality of spray guns around spray washing tower (for removing CO2) sidewall respectively, by spraying, sidewall is run through in washing tower (for removing CO2) outside to described each spray gun and sensing spray washing tower (for removing CO2) center arranges.
3. blast-furnace gas alkali spraying dechlorination device as claimed in claim 2, is characterized in that: described spray gun comprises a plurality of short spray guns, a plurality of long spray gun and a plurality of middle length spray gun.
4. blast-furnace gas alkali spraying dechlorination device as claimed in claim 3, is characterized in that: described a plurality of short spray guns, a plurality of long spray gun and a plurality of middle length spray gun are uniformly distributed around spray washing tower (for removing CO2) sidewall respectively.
5. blast-furnace gas alkali spraying dechlorination device as claimed in claim 2, is characterized in that: described spray gun arranges a plurality of nozzles downwards.
6. blast-furnace gas alkali spraying dechlorination device as claimed in claim 1, is characterized in that: above described filler dewatering unit, be also provided with filler flushing arrangement.
7. blast-furnace gas alkali spraying dechlorination device as claimed in claim 6, is characterized in that: described filler flushing arrangement consists of annular spray gun.
8. blast-furnace gas alkali spraying dechlorination device as claimed in claim 1, is characterized in that: on described outlet pipe and the position of closing on air outlet be provided with diffusion valve.
9. blast-furnace gas alkali spraying dechlorination device as claimed in claim 1, is characterized in that: below described spray washing tower (for removing CO2), be provided with pond.
CN201320783605.3U 2013-12-02 2013-12-02 Blast furnace gas alkali spraying and dechlorination device Active CN203569127U (en)

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103977667A (en) * 2014-05-29 2014-08-13 厦门市大净环保科技有限公司 Electroplating waste gas treatment device
CN106086261A (en) * 2016-06-29 2016-11-09 中冶东方工程技术有限公司 Blast furnace gas pipeline spray alkali deacidifying device and technique
CN109136438A (en) * 2018-10-30 2019-01-04 中冶京诚工程技术有限公司 A kind of blast furnace gas integrated treatment recovery method
CN113046140A (en) * 2021-03-10 2021-06-29 中冶华天工程技术有限公司 Novel blast furnace gas desulfurization tower and operation method
WO2021227522A1 (en) * 2020-05-13 2021-11-18 中冶南方工程技术有限公司 Collection tank for coal gas cleaning water, and coal gas cleaning device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103977667A (en) * 2014-05-29 2014-08-13 厦门市大净环保科技有限公司 Electroplating waste gas treatment device
CN106086261A (en) * 2016-06-29 2016-11-09 中冶东方工程技术有限公司 Blast furnace gas pipeline spray alkali deacidifying device and technique
CN106086261B (en) * 2016-06-29 2018-03-02 中冶东方工程技术有限公司 Blast furnace gas pipeline sprays alkali deacidifying device and technique
CN109136438A (en) * 2018-10-30 2019-01-04 中冶京诚工程技术有限公司 A kind of blast furnace gas integrated treatment recovery method
WO2021227522A1 (en) * 2020-05-13 2021-11-18 中冶南方工程技术有限公司 Collection tank for coal gas cleaning water, and coal gas cleaning device
CN113046140A (en) * 2021-03-10 2021-06-29 中冶华天工程技术有限公司 Novel blast furnace gas desulfurization tower and operation method

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