CN210171217U

CN210171217U - SCR denitration system for gas turbine and waste heat boiler generator set

Info

Publication number: CN210171217U
Application number: CN201920671165.XU
Authority: CN
Inventors: Haiwei Dong; 董海威; Jianbin Dong; 董建彬; Fang Jin; 靳芳; Bing Yang; 杨兵
Original assignee: Tuopu Beijing Technology Co ltd
Current assignee: Tuopu Beijing Technology Co ltd
Priority date: 2019-05-10
Filing date: 2019-05-10
Publication date: 2020-03-24
Anticipated expiration: 2029-05-10

Abstract

The utility model relates to a relevant technical field of urea preparation, and a SCR deNOx systems for gas turbine and exhaust-heat boiler generating set is disclosed, including preparing tower, exhaust-heat boiler and gas turbine, the top passage department fixed mounting who prepares the tower has urea to throw the feeder tube, the annular inside wall top fixed mounting who prepares the tower has the vortex tube, the spout has been seted up in the side of keeping away from and preparing the tower inside wall to the vortex tube, the fixedly connected with catheter of drain mouth department on the vortex tube, the catheter runs through the inside wall of preparing the tower and extends to the outside of preparing the tower in the one end of keeping away from the vortex tube, the fixedly connected with fluid-discharge tube of bottom drain mouth department of preparing the tower, the terminal fixedly connected with frequency conversion measuring pump of fluid-discharge tube, the output port fixedly connected with transfer line. This an SCR deNOx systems for gas turbine and exhaust-heat boiler generating set need not to add the heat tracing system, has practiced thrift the heat source, reduces ammonia escape, has practiced thrift the cost investment.

Description

SCR denitration system for gas turbine and waste heat boiler generator set

Technical Field

The utility model relates to a relevant technical field of urea preparation specifically is a SCR deNOx systems for gas turbine and exhaust-heat boiler generating set.

Background

The conventional SCR denitration system comprises a urea solution preparation system, a urea solution conveying system, a urea pyrolysis system, an injection system, an SCR reactor, a soot blowing system and the like, wherein the urea solution preparation system comprises a urea adding device, a stirrer, a heat tracing system and the like; the urea solution conveying system adopts a combination mode of a pump and an adjusting valve; the urea pyrolysis system comprises a urea injection system and a urea pyrolysis furnace; the SCR reactor leads the flue gas from the furnace back flue to an SCR inlet, and the flue gas is led back to the furnace back flue after denitration treatment; the soot blowing system comprises the acoustic soot blower and the like, the process is long and complex, the investment is large, the process of the system is simplified through the optimization and improvement of the system, the investment is saved, and the operation and the maintenance are convenient.

SUMMERY OF THE UTILITY MODEL

The problem of the existing SCR denitration system that the process is long and complicated is solved.

The utility model provides a SCR deNOx systems for gas turbine and exhaust-heat boiler generating set, is including preparing tower, exhaust-heat boiler and gas turbine, the top guide mouth department fixed mounting who prepares the tower has the urea to throw and throws the pipe, the annular inside wall top fixed mounting who prepares the tower has the vortex pipe, the vortex pipe has seted up the orifice in the side of keeping away from and preparing the tower inside wall, the fixedly connected with catheter of drain mouth department on the vortex pipe, the catheter runs through the inside wall of preparing the tower and extends to the outside of preparing the tower in the one end of keeping away from the vortex pipe, the fixedly connected with fluid-discharge tube of bottom fluid-discharge port department of preparing the tower, the terminal fixedly connected with frequency conversion measuring pump of fluid-discharge tube, the output.

The exhaust pipe is fixedly connected with an exhaust port on the left side of the gas turbine, a flue is fixedly mounted at the bottom of the inner side of the waste heat boiler, the tail end of the exhaust pipe penetrates through the waste heat boiler and is fixedly connected with a smoke guide port fixed with the flue, a urea solution spray gun is fixedly connected with one end of the liquid transfer pipe far away from the variable frequency metering pump, a nozzle of the urea solution spray gun penetrates through the side face of the waste heat boiler and is fixedly connected with a reserved port of the flue, an SCR reactor is fixedly mounted on the inner side of a hearth of the waste heat boiler, the tail end of the flue penetrates through the bottom of the hearth of the waste heat boiler and extends to the inner cavity of the hearth of the waste heat boiler, the tail end of the flue is fixedly connected with a smoke guide inlet at the bottom of the SCR reactor, a smoke discharge port is formed in the top of the SCR reactor, the exhaust port of the SCR reactor penetrates, and a urea delivery pipe is fixedly installed at a liquid guide port at the bottom of the right side of the hearth of the waste heat boiler.

Preferably, the turbulent flow tube is an annular tube, and the spray holes on the inner side of the turbulent flow tube are arranged in an annular array.

Preferably, the variable-frequency metering pump can adopt a large-base electronic control type variable-frequency metering pump.

Preferably, the temperature range of the positions of the nozzle of the urea solution spray gun and the reserved opening of the flue is 350-650 ℃.

Preferably, the temperature range of the SCR catalyst of the SCR reactor in the hearth of the waste heat boiler is 320-420 ℃.

Compared with the prior art:

(1) this an SCR deNOx systems for gas turbine and exhaust-heat boiler generating set, urea dispose in the configuration tower, utilize the vortex pipe to replace traditional agitator, simplified urea solution preparation system, guaranteed urea solution's preparation efficiency, avoided the agitator in drawbacks such as wearing and tearing, corruption and the jam in the use, direct configuration 5% urea solution need not to add the heat tracing system, has practiced thrift the heat source, reduces the investment.

(2) This an SCR deNOx systems for gas turbine and exhaust-heat boiler generating set, urea solution derive the circulation through the frequency conversion measuring pump, carry and adopt the frequency conversion measuring pump to adjust alone, make the quantity of urea solution make the adjustment rapidly along with boiler load, and the urea input amount of strict control reduces ammonia escape.

(3) This an SCR deNOx systems for gas turbine and exhaust-heat boiler generating set sprays urea into 350 ℃ -650 ℃ temperature section of urea pyrolysis in the flue through the urea solution spray gun directly, utilizes flue gas heat directly with urea solution pyrolysis in the flue, and the heat source is reliable and stable, the energy can be saved.

(4) According to the SCR denitration system for the gas turbine and the waste heat boiler generator set, the SCR reactor is arranged in a hearth of the waste heat boiler, the SCR catalyst is directly arranged in a suitable temperature range of 320-420 ℃ in the waste heat boiler, the SCR reactor is not arranged independently, the occupied space is saved, and the cost and the investment are saved.

Drawings

Fig. 1 is a schematic view of the system flow of the present invention.

In the figure: the system comprises a preparation tower 1, a urea feeding pipe 2, a turbulent flow pipe 3, spray holes 4, a liquid guide pipe 5, a liquid discharge pipe 6, a variable frequency metering pump 7, a liquid delivery pipe 8, a urea solution spray gun 9, a waste heat boiler 10, a gas turbine 11, a smoke discharge pipe 12, a flue 13, an SCR reactor 14, a smoke discharge port 15, a liquid discharge port 16 and a urea delivery pipe 17.

Detailed Description

As shown in fig. 1, the utility model provides a technical solution: an SCR denitration system for a gas turbine and a waste heat boiler generator set comprises a preparation tower 1, a waste heat boiler 10 and a gas turbine 11, wherein a urea feeding pipe 2 is fixedly installed at a material guide port at the top of the preparation tower 1, a turbulent flow pipe 3 is fixedly installed above the annular inner side wall of the preparation tower 1, spray holes 4 are formed in the side face, far away from the inner side wall of the preparation tower 1, of the turbulent flow pipe 3, the spray holes 4 in the inner side of the turbulent flow pipe 3 are formed in an annular array, high-pressure preparation liquid led out by the spray holes 4 impacts urea raw materials in a high-pressure mode to enable the urea raw materials and the preparation liquid to be fully mixed, 5% of urea solution is directly prepared, a liquid guide pipe 5 is fixedly connected to the material guide port on the turbulent flow pipe 3, one end, far away from the turbulent flow pipe 3, of the liquid guide pipe 5 penetrates through the inner side wall of the preparation tower 1 and, the tail end of the liquid discharge pipe 6 is fixedly connected with a variable frequency metering pump 7, an output port of the variable frequency metering pump 7 is fixedly connected with a liquid conveying pipe 8, and the variable frequency metering pump 7 can adopt a large-base electric control type variable frequency metering pump.

A smoke exhaust pipe 12 is fixedly connected to an exhaust port on the left side of a gas turbine 11, a flue 13 is fixedly installed at the bottom of the inner side of the waste heat boiler 10, the tail end of the smoke exhaust pipe 12 penetrates through the waste heat boiler 10 and is fixedly connected with a smoke guide port fixed with the flue 13, a urea solution spray gun 9 is fixedly connected to one end of a liquid conveying pipe 8 far away from a variable frequency metering pump 7, a nozzle of the urea solution spray gun 9 penetrates through the side face of the waste heat boiler 10 and is fixedly connected with a reserved port of the flue 13, an SCR reactor 14 is fixedly installed on the inner side of a hearth of the waste heat boiler 10, the tail end of the flue 13 penetrates through the bottom of the hearth of the waste heat boiler 10 and extends to the inner cavity of the hearth of the waste heat boiler 10, the tail end of the flue 13 is fixedly connected with a smoke guide inlet at the bottom of the SCR reactor 14, the temperature range of, an exhaust port 15 of the SCR reactor 14 penetrates through the top of the hearth of the waste heat boiler 10 and extends to the outer side of the waste heat boiler 10, a liquid outlet 16 is formed in the bottom of the left side of the SCR reactor 14, a urea conveying pipe 17 is fixedly installed at a liquid guide port at the bottom of the right side of the hearth of the waste heat boiler 10, and a temperature section of an SCR catalyst of the SCR reactor 14, which is located in the hearth of the waste heat boiler 10, ranges from 320 ℃ to 420 ℃.

When the equipment is used, raw materials are put into a preparation tower 1 through a urea feeding pipe 2, then high-pressure preparation liquid is led into the preparation tower 1 through a liquid guide pipe 5, the preparation liquid is divided through a flow disturbing pipe 3, and finally the raw materials are diluted and impacted through a spray hole 4, so that the preparation of urea is realized, a heat tracing system is not needed, a heat source is saved, after the urea solution is prepared, the solution is led out through a liquid discharge pipe 6 and is discharged in a controlled amount through a variable frequency meter 7, the urea solution is led into a flue 13 through a liquid conveying pipe 8 and a urea solution spray gun 9, meanwhile, flue gas generated by the operation of a gas turbine 11 is led into the flue 13 through a smoke discharge pipe 12, the urea solution is sprayed to a temperature section of 350-650 ℃ in the flue 13 for pyrolysis, the pyrolyzed urea enters an SCR catalyst section of an SCR reactor 14 through the flue 13, and is finally discharged through a smoke discharge port 15, the urea is discharged through a liquid outlet 16 of the SCR reactor 14 and finally is led out through a urea outlet pipe 17 for the next process step.

Claims

1. The utility model provides a SCR deNOx systems for gas turbine and exhaust-heat boiler generating set, is including preparing tower (1), exhaust-heat boiler (10) and gas turbine (11), its characterized in that: a urea feeding pipe (2) is fixedly installed at a top material guide port of the preparation tower (1), a turbulent flow pipe (3) is fixedly installed above the annular inner side wall of the preparation tower (1), a spray hole (4) is formed in the side face, far away from the inner side wall of the preparation tower (1), of the turbulent flow pipe (3), a liquid guide pipe (5) is fixedly connected to a liquid guide port on the turbulent flow pipe (3), one end, far away from the turbulent flow pipe (3), of the liquid guide pipe (5) penetrates through the inner side wall of the preparation tower (1) and extends to the outer side of the preparation tower (1), a liquid discharge pipe (6) is fixedly connected to a liquid discharge port at the bottom of the preparation tower (1), a variable-frequency metering pump (7) is fixedly connected to the tail end of the liquid discharge pipe (6), and a;

the utility model discloses a flue gas treatment device, including gas turbine (11), the left side exhaust port department fixedly connected with of gas turbine (11) discharges fume tub (12), the inboard bottom fixed mounting of exhaust-heat boiler (10) has flue (13), the end of discharging fume tub (12) runs through exhaust-heat boiler (10) and leads cigarette mouth fixed connection fixed with flue (13), the transfer line (8) is keeping away from one end fixedly connected with urea solution spray gun (9) of frequency conversion measuring pump (7), the spout of urea solution spray gun (9) run through the side of exhaust-heat boiler (10) and with the reservation mouth fixed connection of flue (13), the inboard fixed mounting of furnace of exhaust-heat boiler (10) has SCR reactor (14), the end of flue (13) runs through the furnace bottom of exhaust-heat boiler (10) and extends to exhaust-heat boiler (10) furnace inner chamber, the end of flue (13) and the lead cigarette entry fixed connection of SCR reactor (14) bottom, an exhaust port (15) is formed in the top of the SCR reactor (14), the exhaust port (15) of the SCR reactor (14) penetrates through the top of a hearth of the waste heat boiler (10) and extends to the outer side of the waste heat boiler (10), a liquid discharge port (16) is formed in the bottom of the left side of the SCR reactor (14), and a urea conveying pipe (17) is fixedly installed at a liquid guide port at the bottom of the right side of the hearth of the waste heat boiler (10).

2. The SCR denitration system for a gas turbine and a waste heat boiler generator set according to claim 1, characterized in that: the turbulent flow tube (3) is an annular tube, and the spray holes (4) on the inner side of the turbulent flow tube (3) are arranged in an annular array.

3. The SCR denitration system for a gas turbine and a waste heat boiler generator set according to claim 1, characterized in that: the variable-frequency metering pump (7) can adopt a large-base electric control type variable-frequency metering pump.

4. The SCR denitration system for a gas turbine and a waste heat boiler generator set according to claim 1, characterized in that: the temperature range of the positions of the nozzle of the urea solution spray gun (9) and the reserved opening of the flue (13) is 350-650 ℃.

5. The SCR denitration system for a gas turbine and a waste heat boiler generator set according to claim 1, characterized in that: the SCR catalyst of the SCR reactor (14) is positioned in a temperature range of 320-420 ℃ in a hearth of the waste heat boiler (10).