CN204522727U - A kind of coke oven combustion exhaust gas denitration system - Google Patents
A kind of coke oven combustion exhaust gas denitration system Download PDFInfo
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- CN204522727U CN204522727U CN201420858276.9U CN201420858276U CN204522727U CN 204522727 U CN204522727 U CN 204522727U CN 201420858276 U CN201420858276 U CN 201420858276U CN 204522727 U CN204522727 U CN 204522727U
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Abstract
The utility model embodiment discloses a kind of coke oven combustion exhaust gas denitration system, comprising: reducing agent storage device, reducing agent jetting device; Wherein, reducing agent jetting device is positioned at coke oven regenerator, and described reducing agent jetting device is connected with the reducing agent storage device of coke oven regenerator outside by connecting pipe, described connecting pipe is provided with the first stop valve.Compared with prior art, owing to have employed different denitrating techniques, do not need to arrange denitration catalyst device, therefore the technical solution of the utility model construction investment is little, and operating cost is lower, takes up an area little.
Description
Technical field
The utility model relates to coke oven combustion waste gas purification field, particularly a kind of coke oven combustion exhaust gas denitration system.
Background technology
Coal chemical enterprise can produce a large amount of coke oven combustion waste gas in process of production, and coke oven combustion waste gas mentioned here refers to the gas that mixed combustion in coke oven vertical flame path produces by coal gas and air.Containing a large amount of nitrogen oxide (NO in the coke oven combustion waste gas produced
x).The coke oven combustion waste gas of present each coal chemical enterprise all needs to enter air through flue, regenerator, bottom flue, waste gas exchange shutter, point flue, main chimney flue, chimney, wherein regenerator is positioned in the middle part of coke oven body is the unit of Mist heat recovering, and the direct discharge of coke oven combustion waste gas causes severe contamination to environment.China's regulation was from 1 day January in 2015, and existing coal chemical enterprise must perform GB16171-2012 discharge standard.That is, the coke oven combustion waste gas that coal chemical enterprise produces later has to pass through denitration (i.e. denitrifying oxide) process before discharge.
In the prior art, the denitration of coke oven combustion waste gas is all that main chimney flue place utilizes catalysis technique and carries out denitration according to fluidization principle after coke oven combustion exhaust gas disc.Fig. 1 is a kind of existing coke oven combustion exhaust gas denitration system architecture schematic diagram, and the coke oven combustion waste gas that coke oven combustion chamber 2 produces enters coke oven flue gas main chimney flue 3 by coke oven regenerator 1, exhaust gas disc 12.On coke oven flue gas main chimney flue 3, UNICOM arranged side by side loop smoke pipe 7, loop smoke pipe 7 is disposed with denitration catalyst device 8 and air-introduced machine 9, and the arrival end of loop smoke pipe and the port of export are provided with the first stop valve 6 and the second stop valve 10.Denitrification reducing agent and ammoniacal liquor or ammonia enter loop smoke pipe 7 between the first stop valve 6 and denitration catalyst device 8, and denitration catalyst device 8 is built with catalyst layer.Coke oven combustion waste gas removes the nitrogen oxide (NO in flue gas under the effect of reducing agent and catalyst
x), and discharge from chimney 5.
In the prior art above-mentioned, the denitration of coke oven combustion waste gas is all that main chimney flue place utilizes catalysis technique and carries out denitration according to fluidization principle after coke oven waste gas disk, in denitrating technique, the ammonia that reducing agent adopts coal chemical enterprise ammonia still process workshop section to produce mostly, as reducing agent, utilizes catalyst layer composite construction to reduce the nitrogen oxide in burnt gas as denitration means.Adopt above-mentioned denitrating technique, need to increase denitrating catalyst, and need to set up large discharge high-temperature blower to overcome Catalytic Layer resistance, therefore cause the construction investment of this technology large, operating cost is high, takes up an area large.
Utility model content
For solving the problem, the utility model embodiment discloses a kind of coke oven combustion exhaust gas denitration system.Technical scheme is as follows:
A kind of coke oven combustion exhaust gas denitration system, can comprise: reducing agent storage device, reducing agent jetting device; Wherein, reducing agent jetting device is positioned at coke oven regenerator, and described reducing agent jetting device is connected with the reducing agent storage device of coke oven regenerator outside by connecting pipe, described connecting pipe is provided with the first stop valve.
In a kind of preferred embodiment of the present utility model, described reducing agent jetting device is specially: at least one reducing agent sprays into pipeline.
In a kind of preferred embodiment of the present utility model, also comprise: instrument control device, described instrument control device is for controlling described first stop valve.
In a kind of preferred embodiment of the present utility model, described reducing agent is ammonia-containing gas or contains ammonia liquid.
In a kind of preferred embodiment of the present utility model, the reducing agent outlet of described reducing agent jetting device is positioned at the region that coke oven regenerator temperature is 850 DEG C-1100 DEG C.
In a kind of preferred embodiment of the present utility model, described reducing agent jetting device outer setting protection chuck, has the air of flowing or water for lowering the temperature for reducing agent jetting device in described protection chuck.
The technical solution of the utility model, on the basis of the existing process units of coal chemical enterprise, by increasing reducing agent storage device, and in coke oven regenerator, increase reducing agent jetting device, just can realize after the coke oven combustion waste gas generated enters coke oven regenerator from the top of coke oven regenerator, reducing agent in reducing agent storage device is introduced in reducing agent jetting device, and to be injected to temperature in coke oven regenerator by the outlet of the reducing agent of reducing agent jetting device be the region of 850 DEG C-1100 DEG C, make the active component in reducing agent and the reaction of nitrogen oxides in coke oven combustion waste gas, conversion of nitrogen oxides is become nitrogen, realize coke oven combustion exhaust gas denitration, reach the discharge standard of country.Compared with prior art, owing to have employed different denitrating techniques, do not need to arrange denitration catalyst device, therefore the technical solution of the utility model construction investment is little, and operating cost is lower, takes up an area little.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of coke oven combustion exhaust gas denitration system architecture schematic diagram of existing coke oven denitrating technique;
The structural representation of the first coke oven combustion exhaust gas denitration system that Fig. 2 provides for the utility model;
The structural representation of the second coke oven combustion exhaust gas denitration system that Fig. 3 provides for the utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
A kind of coke oven combustion exhaust gas denitration system that Fig. 2 provides for the utility model, can comprise: reducing agent storage device 01, reducing agent jetting device 03; Wherein, reducing agent jetting device 03 is positioned at coke oven regenerator 02, and the outlet of the reducing agent of reducing agent jetting device 03 is positioned at the region that coke oven regenerator 02 temperature is 850 DEG C-1100 DEG C, reducing agent jetting device 03 is connected by the reducing agent storage device 01 of connecting pipe with coke oven regenerator 02 outside, and described connecting pipe is provided with the first stop valve 04.
It should be noted that, reducing agent storage device 01 can be determined according to the concrete form of reducing agent by those skilled in the art, such as when reducing agent is liquid, reducing agent storage device 01 just can adopt accordingly for the device of storage of liquids, can also configure reducing agent gasification installation.When reducing agent is gaseous state, reducing agent storage device 01 just can adopt corresponding for storing the device of gas.
It should be noted that further, the reducing agent jetting device 03 shown in Fig. 2 is a kind of schematic diagram just, and its specific implementation form the utility model does not need to limit.As long as the former also agent in reducing agent storage device 01 can be incorporated in coke oven regenerator 02 by it, and reducing agent to be injected to temperature in coke oven regenerator 02 be the region of 850 DEG C-1100 DEG C.
In the production process of reality, it is coke oven combustion chamber 05 above coke oven regenerator 02, coke oven combustion waste gas is generated after coal gas and air mixed combustion in coke oven combustion chamber 05, after this coke oven combustion waste gas enters coke oven regenerator 02 recovery section heat from the flue of coke oven combustion chamber 05, then discharge enters bottom flue bottom coke oven regenerator 02.After coke oven exhaust gas has discharged, coal gas and air enter coke oven combustion chamber 05 flue after absorbing heat by coke oven regenerator 02 has again burnt.
In coke oven regenerator 02, spray into opportunity in order to reducing agent jetting device 03 can be controlled easily, need installation first stop valve 04.First stop valve 04 controls reducing agent jetting device 03 and opens when primary air flows downward in coke oven regenerator 02, closes when in coke oven regenerator 02, primary air upwards flows.
In actual production process, this control valve 04 can by controlling manually, but in order to realize the automation of producing, in a kind of preferred embodiment of the present utility model, this system can also comprise: instrument control device, and described instrument control device is for controlling this first stop valve 04 described.Like this, save artificial on the one hand, control also can be made on the other hand more accurate.It should be noted that, the specific embodiment of above-mentioned instrument control device can adopt related art scheme of the prior art to realize, and the utility model does not do concrete restriction at this.
In the process of actual production, sometimes because the reasons such as maintenance need the operation stopping whole exhaust gas denitration system, now need reducing agent storage device 01 and reducing agent jetting device 03 to separate completely.Although close stop valve 04 also can play effect reducing agent storage device 01 and reducing agent jetting device 03 separated, but in order to prevent because stop valve 04 is malfunctioning and cause adverse consequences, in a kind of preferred embodiment of the present utility model, as shown in Figure 2, connecting pipe between described stop valve 04 and reducing agent storage device 01 also comprises the second stop valve 06, second stop valve 06 and can also control reducing agent jetting device 03 sprays into amount from reducing agent to coke oven regenerator 02.
Crucial part of the present utility model is, the reducing agent outlet of reducing agent jetting device 03 is positioned at the region that coke oven regenerator 02 temperature is 850 DEG C-1100 DEG C, preferably, the reducing agent outlet of reducing agent jetting device 03 is positioned at the region that coke oven regenerator 02 temperature is 900 DEG C-1000 DEG C.The particular location of this region in coke oven regenerator 02 can be determined according to the concrete form of the condition of production of reality and coke oven regenerator 02 by those skilled in the art, and the utility model does not do concrete restriction at this.Preferably, described reducing agent jetting device can be: at least one reducing agent sprays into pipeline.The quantity that reducing agent sprays into pipeline can be determined according to the concrete form of coke oven regenerator and the amount of coke oven exhaust gas that produces by those skilled in the art, and the utility model does not do concrete restriction at this.Be understandable that, because reducing agent jetting device 03 is in the higher working environment of temperature, therefore, reducing agent jetting device 03 can adopt high temperature resistant material, such as can adopt the stainless steel 310S material of tolerance 1000 DEG C, a thermal insulation chuck can be increased in the outside of this reducing agent jetting device 03 when material cannot adapt to high temperature, pass into the cooling-air of cooling or water in the middle of the chuck to ensure the normal work of reducing agent jetting device 03.
After above-mentioned coke oven combustion exhaust gas denitration system, coke oven combustion waste gas can remove nitrogen oxide (NO wherein
x), and enter coke oven flue gas main chimney flue by exhaust gas disc 07, finally discharge from chimney.
In actual applications, the process that the coke oven combustion exhaust gas denitration system that application the utility model provides carries out coke oven combustion exhaust gas denitration is: when the coke oven combustion waste gas generated enters coke oven regenerator 02 from the top of coke oven regenerator 02, when accumulation of heat indoor air flow is flowed downward, open the first stop valve 04, reducing agent in reducing agent storage device 01 is introduced in reducing agent jetting device 03, and to be injected to temperature in coke oven regenerator 02 by the outlet of the reducing agent of reducing agent jetting device 03 be the region of 850 DEG C-1100 DEG C, reaction of nitrogen oxides in active component in the reducing agent sprayed and coke oven combustion waste gas, conversion of nitrogen oxides is become nitrogen, realize coke oven combustion exhaust gas denitration, coke oven combustion waste gas after denitration is discharged bottom coke oven regenerator 02.Wherein, the active component in described reducing agent is ammonia.
What the crucial part of whole coke oven combustion exhaust gas denitration was reducing agent sprays into position, and namely in coke oven regenerator 02, temperature is that the region of 850 DEG C-1100 DEG C sprays into reducing agent.Only have at this temperature, the active component ammonia in reducing agent could when there is no catalyst with the reaction of nitrogen oxides in coke oven combustion waste gas, conversion of nitrogen oxides is become nitrogen, realizes coke oven combustion exhaust gas denitration.Preferably, in coke oven regenerator 02, temperature is that the region of 900 DEG C-1000 DEG C sprays into reducing agent, and the extent of reaction of ammonia and nitrogen oxide can be made higher, and coke oven combustion exhaust gas denitration carries out more thorough.
It should be noted that, as long as said reducing agent comprises active component ammonia in of the present utility model, and other composition can not damage the reaction of ammonia and nitrogen oxide, and that is, reducing agent can be selected ammonia-containing gas or contain ammonia liquid.Be understandable that, the content of the ammonia in reducing agent is higher, and the efficiency of reaction is also higher, and the amount of required reducing agent is also lower.Therefore preferred, reducing agent is ammonia or liquefied ammonia.Consider economic factor, the ammoniacal liquor that preferred employing coal chemical enterprise ammonia still process workshop section produces or the ammonia that ammonia still process tower top is discharged, when the ammonia utilizing ammonia still process tower top to discharge, ammonia still system can as reducing agent storage device 01.
Adopt the technical solution of the utility model to carry out coke oven combustion exhaust gas denitration, the content of the coke oven combustion nitrogen oxides of exhaust gas of final discharge can be made to be less than 200mg/m
3, lower than the GB16171-2012 discharge standard of country.
It should be noted that, each embodiment in this description all adopts relevant mode to describe, between each embodiment identical similar part mutually see, what each embodiment stressed is the difference with other embodiments.Especially, for embodiment of the method, because it is substantially similar to system embodiment, so description is fairly simple, relevant part illustrates see the part of system embodiment.
The foregoing is only preferred embodiment of the present utility model, be not intended to limit protection domain of the present utility model.All do within spirit of the present utility model and principle any amendment, equivalent replacement, improvement etc., be all included in protection domain of the present utility model.
Claims (5)
1. a coke oven combustion exhaust gas denitration system, is characterized in that, comprising: reducing agent storage device, reducing agent jetting device; Wherein, reducing agent jetting device is positioned at coke oven regenerator; described reducing agent jetting device is connected with the reducing agent storage device of coke oven regenerator outside by connecting pipe; described reducing agent jetting device outer setting protection chuck; having the air of flowing or water in described protection chuck for being the cooling of reducing agent jetting device, described connecting pipe being provided with the first stop valve.
2. the system as claimed in claim 1, is characterized in that, described reducing agent jetting device is specially: at least one reducing agent sprays into pipeline.
3. the system as claimed in claim 1, is characterized in that, also comprises: instrument control device, and described instrument control device is for controlling described first stop valve.
4. the system as claimed in claim 1, is characterized in that, described reducing agent is ammonia-containing gas or contains ammonia liquid.
5. the system as claimed in claim 1, is characterized in that, the reducing agent outlet of described reducing agent jetting device is positioned at the region that coke oven regenerator temperature is 850 DEG C-1100 DEG C.
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| CN201420858276.9U CN204522727U (en) | 2014-12-30 | 2014-12-30 | A kind of coke oven combustion exhaust gas denitration system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104524959A (en) * | 2014-12-30 | 2015-04-22 | 北京华泰焦化工程技术有限公司 | Coke oven combustion waste gas denitration system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104524959A (en) * | 2014-12-30 | 2015-04-22 | 北京华泰焦化工程技术有限公司 | Coke oven combustion waste gas denitration system and method |
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Address after: 100176 Fifth Floor 501, Building 15, No. 2, No. 31 Courtyard, Kechuang Thirteenth Street, Daxing Economic and Technological Development Zone, Beijing Patentee after: HUATAI YONGCHUANG (BEIJING) TECHNOLOGY Co.,Ltd. Address before: 101318 14-C, Hui Hui Garden, B zone, Shunyi District airport industry, Beijing Patentee before: BEIJING HUATAI COKING ENGINEERING CONSULTING Corp. |