CN203108427U - Automatic adjusting and spraying equipment for denitrating cement kiln - Google Patents
Automatic adjusting and spraying equipment for denitrating cement kiln Download PDFInfo
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- CN203108427U CN203108427U CN 201320117457 CN201320117457U CN203108427U CN 203108427 U CN203108427 U CN 203108427U CN 201320117457 CN201320117457 CN 201320117457 CN 201320117457 U CN201320117457 U CN 201320117457U CN 203108427 U CN203108427 U CN 203108427U
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Abstract
The utility model discloses automatic adjusting and spraying equipment for denitrating a cement kiln. The automatic adjusting and spraying equipment comprises a spray gun structure arranged at a side wall of a decomposing furnace, wherein an air inlet and a reducing agent inlet are connected with an outlet of a spraying device through pipelines. The automatic adjusting and spraying equipment is characterized in that the spray gun structure is vertically positioned at the side wall of the decomposing furnace; a spray gun body can get in and out of the decomposing furnace; a door sealing air cylinder and a door baffle are vertically arranged on a frame wall of a spray gun; a reducing agent storage tank and a pipeline are provided with inlet valves and outlet valves, liquid level meters and centrifugal pumps; an air source cabinet is internally provided with a compressed air pressure transmitter; a gas circuit is provided with a compressed air outlet valve, a flange ball valve, a reducing agent pressure transmitter and a flowmeter; an automatic control electric cabinet is provided with a terminal connected with an automatic control program module PLC (programmable logic controller); the terminal is respectively connected with electrical parts; control signals of a frequency converter corresponding to the centrifugal pump in a circuit are as follows: a starting signal, a running signal and a fault signal, and an output end of starting, running and fault signals of the frequency converter on a terminal strip is commonly connected with three-phase power with the centrifugal pumps; and the PLC is connected with a touch screen on the electrical cabinet through communication cables.
Description
Technical field
The utility model relates to a kind of cement kiln denitration with regulating spraying apparatus automatically.
Background technology
The NOX discharging becomes a social concern that presses for solution day by day, and technology of producing cement develops into today, entered with the prevailing epoch of new type nonaqueous cement production line, and this production technology is still in continuing development and further improving.In recent years, along with China's economic construction and fast development of society, the fast development of China's cement industry, the discharge capacity of cement industry nitrogen oxide rises, be to occupy thermal power generation, motor vehicle exhaust emission the 3rd discharging rich and influential family afterwards, have a strong impact on atmospheric environment, become the restraining factors of cement industry sustainable development.During " 12 ", nitrogen oxide is put into restrictive index system first, and total emission volumn will cut down 10%.In the technology of some control NOX, the SNCR denitration technology relatively is fit to the actual conditions of China's cement industry, the SNCR technology belongs to the control technology after the burning, be to have amino material do not having under the situation of catalyst, spurted in the dore furnace by pump, generate nontoxic nitrogen G﹠W with NOX reaction reduction under certain condition, its denitration efficiency is generally 40%～80%.Denitration spraying system automaticity in the market is not high, can not accurately control spray amount, causes the escaping of ammonia easily, produce secondary pollution, the spray gun atomizing effect is bad, and the penetration capacity of atomizing particle is not enough, shower nozzle stops up easily, spray gun is through long-time high-temperature calcination, and service life is shorter, and the spray gun that has has Telescopic, but after spray gun stretches out, there is the problem of seriously leaking out in dore furnace, and directly influences the temperature of dore furnace, causes the operating mode instability.
Summary of the invention
The purpose of this utility model is to provide a kind of and overcomes the cement kiln denitration of above-mentioned deficiency with regulating spraying apparatus automatically.
Cement kiln denitration of the present utility model is with regulating spraying apparatus automatically, be included in the dore furnace sidewall spray gun structure is installed, spray gun structure air inlet, reducing agent import link to each other with the outlet of injection apparatus by pipeline, spray device arrangement reducing agent holding vessel, source of the gas cabinet, control regulator cubicle and control circuit automatically, it is characterized in that spray gun structure is vertically fixed on the dore furnace sidewall by spray gun sleeve and weld bond, gun body can be into and out of dore furnace, vertical seal up a door cylinder, the door shield plate installed on the spray gun frame wall; Motor-driven valve, flow control valve are set into and out of valve, liquid level gauge, centrifugal pump in reducing agent holding vessel and the pipeline; Arrange in the source of the gas cabinet compressed air outlet valve and flanged ball valve, reducing agent pressure transmitter and electromagnetic flowmeter are set in compressed air pressure transmitter, the gas circuit; Automatically in the control regulator cubicle terminals that are connected with automatic program module PLC are set, and connect described electricity piece respectively, in the circuit there be the control signal of the frequency converter of corresponding centrifugal pump: the frequency converter enabling signal on the terminal row, frequency converter run signal, frequency converter failure signal output part are connected three-phase electricity jointly with centrifugal pump; Programmable Logic Controller is linked to each other with touch-screen on the regulator cubicle by communication cable.
The cement kiln denitration is with automatically regulating spraying apparatus, and spray gun has that spraying granule is fine and closely woven, and penetration capacity is strong, and prolong service life, and it is flexible and seal up a door automatically automatically from body of heater to regulate spray gun automatically.The basic function of this equipment automatic control system is the emitted dose of regulating reducing agent automatically according to the content of NOX in the flue gas of setting, make the NOX in reducing agent and the flue gas that positive reaction fully take place, generate the nitrogen G﹠W, reduce the concentration of the NOX that contains in the flue gas, guarantee that the NOX discharging meets national environmental standard.Automatic control system relies on the NOX concentration value signal of setting to compare with actual NOX concentration value signal, calculate by pid algorithm, drive frequency converter and adjust the rotating speed of centrifugal pump, thereby the injection flow of control spray gun finally makes actual NOX concentration level off to setting value.During work; automatic control system will be calculated required emitted dose according to actual condition; open corresponding spray gun quantity simultaneously; corresponding spray gun stretches in the dore furnace automatically; during shutdown; spray gun withdraws from dore furnace automatically, has guaranteed that like this spray gun need not be in hot environment for a long time, has prolonged the service life of spray gun.After making solution outflow holding vessel outlet after reductant solution stores through holding vessel and being delivered to the import of frequency conversion centrifugal pump, boosted and to certain pressure limit (0.4～0.6MPa) by the frequency conversion centrifugal pump, be delivered to spray gun through outlet conduit, under compressed-air actuated effect, atomize, produce very tiny atomizing particle, be evenly distributed in the dore furnace, fully mix reacting with NOX in the flue gas, with the control of the NOX content in the flue gas in 400mg/Nm3.
Description of drawings
Fig. 1 is this cement kiln denitration process schematic representation of regulating spraying apparatus automatically;
Fig. 2 is reducing agent and the gas circuit configuration schematic diagram of this spraying apparatus;
Fig. 3 .1 is the spray gun structure of this spraying apparatus and the schematic diagram of being combined with body of heater;
Fig. 3 .2 is the nozzle end sectional view;
Fig. 4 is the circuit control principle figure of this spraying apparatus.
The specific embodiment
The denitration of this cement kiln is for producing in the cement plant, guaranteeing that discharging flue gas NOX content in 400mg/Nm3, meets national standard with regulating spraying apparatus example 1 automatically.
Referring to Fig. 1: cement kiln denitration of the present utility model is with regulating spraying apparatus automatically, be included in dore furnace 1 side spray gun structure 4 is installed, spray gun structure 4 air inlets link to each other with the outlet of injection apparatus 2 by pipeline 5 by gas circuit pipeline 6, reducing agent import, the reductant solution of injection apparatus 2 configuration reducing agent holding vessels 9, moulding is introduced the entrance of injection apparatus 2, also have to injection apparatus 2 supporting automatic control regulator cubicle 3 and control circuit, it is characterized in that spray gun structure 4 vertically is positioned at dore furnace 1 sidewall, gun body 23 can pass dore furnace 1 sidewall into and out of; As shown in Figure 2, feed liquor valve 7, ultrasonic level gage 8, holding vessel liquid valve 10, holding vessel cleaning tapping valve 11 are set on reducing agent holding vessel 9 bodies; Establish centrifugal pump 12 in the fluid pipeline that reducing agent holding vessel 9 connects, centrifugal pump 12 goes out end and establishes motor-driven valve 16, flow control valve 17, flange butterfly 18, and flange butterfly 18 goes out end and establishes compressed air pressure transmitter 19, the compressed air outlet valve 21 in the gas circuit and the flanged ball valve 20 that threeway connects setting in the source of the gas switch board 22; Between flanged ball valve 20 and reducing agent outlet valve 15, reducing agent pressure transmitter 14 is set; Establish electromagnetic flowmeter 13 in the reducing agent pipeline that centrifugal pump 12 goes out between end and the reducing agent outlet valve 15.
Shown in Fig. 3 .1, described spray gun structure 4, comprise gun body 23, spray gun framework 28, it is characterized in that spray gun framework 28 is tubular, openend is installed the framework flange 24 of ring-type, is connected with spray gun sleeve 53, and spray gun sleeve 53 is by weld bond 52 and dore furnace outer wall 51 vertical fixing, at the framework flange 24 inboard high-temperature wearable sealing rings 54 that add, play the effect of sealing.Spray gun telescopic cylinder 25 is installed in gun body 23 rear ends, install wear-resisting circle 56 between dividing plate 55 and the gun body 23 additional and be fixed in the spray gun framework 28 by dividing plate 55, telescopic cylinder 25 is connected with gun body 23 by stroke connecting rod 57 and controls it and move, and gun body 23 front ends vertically pass framework flange 24 and enter in the dore furnace 1; On spray gun framework 28 walls between framework flange 24 and the dividing plate 55, vertical seal up a door cylinder 26, the door shield plate 27 installed.See shown in Fig. 3 .2, reductant solution entrance 58, compressed air inlet 59 is passed spray gun framework 28 and is joined with gun body 23, gun body 23 ends adopt two-fluid shower nozzle 60, have 8 aerosol fluids in the shower nozzle 60 and portal 61, and ring week arranges, be difficult for stopping up, atomizing effect is very good.
Two cylinders are set: drive gun body into and out of the movement of dore furnace by the spray gun telescopic cylinder, when spray gun is not worked, in dore furnace, extract out, avoid high-temperature calcination, prolong spray gun service life, avoid shower nozzle to stop up in the spray gun structure; The effect of cylinder of sealing up a door is that the cylinder of sealing up a door promotes the door shield plate, makes its sealing decompose gun body tapping on furnace wall when gun body is extracted out in the dore furnace automatically, avoids cold air to enter dore furnace and makes that temperature reduces in the dore furnace.
The cement kiln denitration is seen shown in Figure 4 with automatic adjusting spraying apparatus circuit control principle, it is characterized in that controlling automatically the terminals that setting is connected with automatic program module PLC in the regulator cubicle 3 and be respectively system's enabling signal 32, system is ready for signal 33, system failure signal 34, gas circuit motor-driven valve switching signal 35,1# frequency converter enabling signal 36,2# frequency converter enabling signal 37,1# frequency converter run signal 38,2# frequency converter run signal 39,1# frequency converter failure signal 40,2# frequency converter failure signal 41, the spray gun signal 42 that stretches, the spray gun signal 43 of sealing up a door, reducing agent flow signal 44, set NOX concentration signal 45, actual NOX concentration signal 46 ends.System's enabling signal 32 links to each other with Central Control Room DCS system, and gas circuit motor-driven valve switching signal 35 ends connect control gas circuit motor-driven valve 16 Push And Releases.
Centrifugal pump 12 in the injection apparatus 2 has two, the using and the reserved, the corresponding 1# frequency converter of 1# centrifugal pump, the corresponding 2# frequency converter of 2# centrifugal pump.In the circuit there be the control signal of corresponding 1# frequency converter 30: the 1# frequency converter enabling signal 36 on the terminal row 51,1# frequency converter run signal 38,1# frequency converter failure signal 40, and output is connected three-phase electricity with the 1# centrifugal pump; The control signal of 2# frequency converter 31 has: the output of 2# frequency converter enabling signal 37,2# frequency converter run signal 39,2# frequency converter failure signal 41 is connected three-phase electricity jointly with the 2# centrifugal pump; Programmable Logic Controller 29 is linked to each other with touch-screen 50 on the regulator cubicle 3 by communication cable 49.Automatic control system relies on the NOX concentration value signal of setting 45 to compare with actual NOX concentration value signal 46, calculate by pid algorithm, drive frequency converter and adjust the rotating speed of centrifugal pump 12, thereby the injection flow of control spray gun 4 finally makes actual NOX concentration level off to setting value.
Claims (5)
1. the cement kiln denitration is with regulating spraying apparatus automatically, be included in the dore furnace sidewall spray gun structure is installed, spray gun structure air inlet, reducing agent import link to each other with the outlet of injection apparatus by pipeline, spray device arrangement reducing agent holding vessel, source of the gas cabinet, control regulator cubicle and control circuit automatically, it is characterized in that spray gun structure is vertically fixed on the dore furnace sidewall by spray gun sleeve and weld bond, gun body can be into and out of dore furnace, vertical seal up a door cylinder, the door shield plate installed on the spray gun frame wall; Motor-driven valve, flow control valve are set into and out of valve, liquid level gauge, centrifugal pump in reducing agent holding vessel and the pipeline; Arrange in the source of the gas cabinet compressed air outlet valve and flanged ball valve, reducing agent pressure transmitter and electromagnetic flowmeter are set in compressed air pressure transmitter, the gas circuit; Automatically in the control regulator cubicle terminals that are connected with automatic program module PLC are set, and connect described electricity piece respectively, in the circuit there be the control signal of the frequency converter of corresponding centrifugal pump: the frequency converter enabling signal on the terminal row, frequency converter run signal, frequency converter failure signal output part are connected three-phase electricity jointly with centrifugal pump; Programmable Logic Controller is linked to each other with touch-screen on the regulator cubicle by communication cable.
2. cement kiln denitration according to claim 1 is characterized in that arranging on described reducing agent holding vessel (9) body feed liquor valve (7), ultrasonic level gage (8), holding vessel liquid valve (10), holding vessel cleaning tapping valve (11) with regulating spraying apparatus automatically; Establish centrifugal pump (12) in the fluid pipeline that reducing agent holding vessel (9) connects, centrifugal pump (12) goes out end and establishes motor-driven valve (16), flow control valve (17), flange butterfly (18), and flange butterfly (18) goes out end and establishes compressed air pressure transmitter (19), the compressed air outlet valve (21) in the gas circuit and the flanged ball valve (20) that threeway connects setting in the source of the gas switch board (22); Between flanged ball valve (20) and reducing agent outlet valve (15), reducing agent pressure transmitter (14) is set; Centrifugal pump (12) goes out in the reducing agent pipeline between end and the reducing agent outlet valve (15) to establish electromagnetic flowmeter (13).
3. cement kiln denitration according to claim 1 is with regulating spraying apparatus automatically, it is characterized in that described spray gun structure (4): spray gun framework (28) is tubular, openend is installed the framework flange (24) of ring-type, be connected with spray gun sleeve (53), spray gun sleeve (53) is by weld bond (52) and dore furnace outer wall (51) vertical fixing, at the inboard high-temperature wearable sealing ring (54) that adds of framework flange (24), play the effect of sealing; Spray gun telescopic cylinder (25) is installed in gun body (23) rear end, install wear-resisting circle (56) between dividing plate (55) and the gun body (23) additional, also be fixed in the spray gun framework (28) by dividing plate (55), telescopic cylinder (25) is connected with gun body (23) by stroke connecting rod (57) and controls it and move, and gun body (23) front end vertically passes framework flange (24) and enters in the dore furnace (1); On spray gun framework (28) wall between framework flange (24) and the dividing plate (55), vertical seal up a door cylinder (26), the door shield plate (27) installed; Reductant solution entrance (58), compressed air inlet (59) pass spray gun framework (28) and join with gun body (23); Gun body (23) end adopts two-fluid shower nozzle (60), has 8 aerosol fluids in the shower nozzle (60) and portals (61), and ring week arranges.
4. cement kiln denitration according to claim 1 is characterized in that arranging in the described automatic control regulator cubicle (3) terminals that are connected with automatic program module PLC and is respectively system's enabling signal (32) with regulating spraying apparatus automatically, system is ready for signal (33), system failure signal (34), gas circuit motor-driven valve switching signal (35), 1# frequency converter enabling signal (36), 2# frequency converter enabling signal (37), 1# frequency converter run signal (38), 2# frequency converter run signal (39), 1# frequency converter failure signal (40), 2# frequency converter failure signal (41), the spray gun signal (42) that stretches, the spray gun signal (43) of sealing up a door, reducing agent flow signal (44), set NOX concentration signal (45), actual NOX concentration signal (46) end; System's enabling signal (32) links to each other with Central Control Room DCS system, and gas circuit motor-driven valve switching signal (35) end connects control gas circuit motor-driven valve (16) Push And Release.
5. cement kiln denitration according to claim 1 is with regulating spraying apparatus automatically, the control signal that it is characterized in that corresponding 1# frequency converter (30) in the described circuit has: the 1# frequency converter enabling signal (36) on the terminal row (51), 1# frequency converter run signal (38), 1# frequency converter failure signal (40), and output is connected three-phase electricity with the 1# centrifugal pump; The control signal of 2# frequency converter (31) has: the output of 2# frequency converter enabling signal (37), 2# frequency converter run signal (39), 2# frequency converter failure signal (41) is connected three-phase electricity jointly with the 2# centrifugal pump; Programmable Logic Controller (29) is linked to each other with touch-screen (50) on the regulator cubicle (3) by communication cable (49).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320117457 CN203108427U (en) | 2013-03-14 | 2013-03-14 | Automatic adjusting and spraying equipment for denitrating cement kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320117457 CN203108427U (en) | 2013-03-14 | 2013-03-14 | Automatic adjusting and spraying equipment for denitrating cement kiln |
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| Publication Number | Publication Date |
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| CN203108427U true CN203108427U (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320117457 Expired - Fee Related CN203108427U (en) | 2013-03-14 | 2013-03-14 | Automatic adjusting and spraying equipment for denitrating cement kiln |
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| CN (1) | CN203108427U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107008136A (en) * | 2017-05-24 | 2017-08-04 | 中国华电科工集团有限公司 | A kind of SNCR denitrification spray gun energy saver |
| CN109647320A (en) * | 2019-01-10 | 2019-04-19 | 光大环保能源（江阴）有限公司 | A kind of liquid alkaline deacidification system using pneumatic liquid alkaline spray gun |
-
2013
- 2013-03-14 CN CN 201320117457 patent/CN203108427U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107008136A (en) * | 2017-05-24 | 2017-08-04 | 中国华电科工集团有限公司 | A kind of SNCR denitrification spray gun energy saver |
| CN109647320A (en) * | 2019-01-10 | 2019-04-19 | 光大环保能源（江阴）有限公司 | A kind of liquid alkaline deacidification system using pneumatic liquid alkaline spray gun |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20140314 |