CN219481585U

CN219481585U - Denitration device of waste ammonia water thermal power plant

Info

Publication number: CN219481585U
Application number: CN202320673427.2U
Authority: CN
Inventors: 孙凯
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-03-30
Filing date: 2023-03-30
Publication date: 2023-08-08
Anticipated expiration: 2033-03-30

Abstract

The utility model discloses a denitration device of a waste ammonia water thermal power plant, which comprises a steam conveying mechanism, wherein a steam conveying pipe is arranged on the steam conveying mechanism, a first gas flow control valve is arranged on the steam conveying pipe, a waste ammonia water separating device is arranged at one end of the steam conveying pipe, a first conveying pipe is arranged on the waste ammonia water separating device, a first pressure valve is arranged on the first conveying pipe, a temperature compensator is arranged at one end of the first conveying pipe, an ammonia buffer tank is arranged at one side of the temperature compensator, a second conveying pipe and a second pressure valve are arranged between the temperature compensator and the ammonia buffer tank, a denitration SCR (selective catalytic reduction) area is arranged at one side of the ammonia buffer tank, an ammonia conveying pipe is arranged between the ammonia buffer tank and the denitration SCR area, and a second gas flow control valve is arranged on the ammonia conveying pipe. Compared with the prior art, the denitration device for the waste ammonia water thermal power plant changes waste ammonia water into valuable, recycles resources, reduces denitration loss and protects the environment.

Description

Denitration device of waste ammonia water thermal power plant

Technical Field

The utility model relates to the technical field of denitration, in particular to a denitration device of a waste ammonia thermal power plant.

Background

Among numerous flue gas denitration technologies, a Selective Catalytic Reduction (SCR) technology is one of the most widely used flue gas denitration technologies in large-scale thermal power plants at present. The highest denitration efficiency of the SCR flue gas denitration technology can reach more than 90%, and the SCR flue gas denitration technology is the most mature and reliable denitration technology. As a main stream denitration technology in the current flue gas denitration market, the method has the characteristics of high denitration efficiency, low NOx emission concentration, low ammonia escape concentration, mature and stable device operation and the like, and has a great market space under increasingly strict environmental protection standards. In the process routing of the SCR process, it is most critical to determine the appropriate reductant according to the specific project requirements. The common denitration reducing agents used in the SCR method are ammonia, urea and ammonia water, and no matter the ammonia water, the ammonia water or the urea is used as the SCR reducing agent, the ammonia water or the urea is required to be converted into ammonia gas, and then the ammonia gas enters an SCR reactor to carry out denitration reaction. However, no matter ammonia water, liquid ammonia or urea is used as SCR reducer, the comprehensive cost is relatively high, and especially, urea is used as reducer, special urea pyrolysis or urea hydrolysis device is needed, and the primary investment cost is relatively high.

The waste ammonia water is an unavoidable product in industrial production, and most of the waste ammonia water is treated by waste disposal and harmless treatment is carried out on the waste ammonia water by professional equipment. Therefore, we propose a waste ammonia thermal power plant denitration device which is applied to denitration technology to change waste ammonia into valuable.

Disclosure of Invention

The utility model mainly aims to provide a denitration device of a waste ammonia thermal power plant, which can effectively solve the problems in the background technology.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a waste ammonia water thermal power plant denitrification facility, includes steam conveying mechanism, fixedly connected with steam conveying pipe on the steam conveying mechanism, be provided with first gas flow control valve on the steam conveying pipe, steam conveying pipe keeps away from steam conveying mechanism's one end fixedly connected with waste ammonia water separator, waste ammonia water separator is last fixedly connected with first conveyer pipe, be provided with first pressure valve on the first conveyer pipe, waste ammonia water separator's one end fixedly connected with temperature compensator is kept away from to first conveyer pipe, temperature compensator one side is provided with the ammonia buffer tank, fixedly connected with second conveyer pipe between temperature compensator and the ammonia buffer tank, be provided with the second pressure valve on the second conveyer pipe, ammonia buffer tank one side is provided with denitration SCR district, fixedly connected with ammonia conveyer pipe between ammonia buffer tank and the denitration SCR district, be provided with second gas flow control valve on the ammonia conveyer pipe.

As further description of the technical scheme, the waste ammonia water separation device comprises a waste ammonia water tower, the top end of the waste ammonia water tower is fixedly connected with a cooler, the top end of the cooler is fixedly connected with a gas-water separator, and the bottom end of the waste ammonia water tower is provided with a liquid discharge pipe.

As a further description of the technical scheme, the waste ammonia water tower, the cooler and the gas-water separator are all communicated with each other.

As a further description of the above technical solution, the steam delivery pipe is fixedly connected between the waste ammonia water tower and the steam delivery mechanism, and the first delivery pipe is fixedly connected between the gas-water separator and the temperature compensator.

As a further description of the above technical solution, the first pressure valve is used for adjusting the pressure between the gas-water separator and the temperature compensator to maintain the ammonia gas delivery in a constant pressure state to control the ammonia gas flow rate, and the second pressure valve is used for adjusting the pressure between the temperature compensator and the ammonia gas buffer tank to maintain the ammonia gas delivery in a constant pressure state to control the ammonia gas flow rate.

As a further description of the above technical solution, the temperature compensator is used for performing temperature compensation on ammonia gas to avoid liquefaction of the ammonia gas.

As a further description of the above technical solution, the ammonia buffer tank is used for keeping the internal ammonia gas flow stable, and preventing the occurrence of suck-back phenomenon.

Compared with the prior art, the utility model has the following beneficial effects:

the waste ammonia water is heated and volatilized through the high-temperature steam conveyed into the waste ammonia water tower by the steam conveying pipe, ammonia and steam are separated by the cooler and the steam-water separator, the separated steam is condensed and liquefied into water to be discharged from the liquid discharge pipe, the ammonia enters the temperature compensator through the first pressure valve and is conveyed into the ammonia buffer tank by the temperature compensator, and finally the ammonia is stably conveyed to the denitration SCR region through the second gas flow control valve 13, so that the flue gas of the thermal power plant is subjected to denitration work, the treatment problem of the waste ammonia water is solved, the environment is protected, waste materials are changed into valuable materials, the resources are reused, and the energy loss and the comprehensive cost in the denitration work are reduced.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a denitration device of a waste ammonia thermal power plant.

In the figure: 1. a steam delivery mechanism; 2. a steam delivery pipe; 3. a first gas flow control valve; 4. a waste ammonia water separation device; 5. a first delivery tube; 6. a first pressure valve; 7. a temperature compensator; 8. an ammonia buffer tank; 9. a second delivery tube; 10. a second pressure valve; 11. a denitration SCR region; 12. an ammonia gas delivery pipe; 13. a second gas flow control valve; 41. waste ammonia water tower; 42. a cooler; 43. a gas-water separator; 44. and a liquid discharge pipe.

Detailed Description

In order to make the technical means, the creation characteristics and the effect of achieving the object of the present utility model easy to understand, the present utility model is further described below with reference to the specific embodiments.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1, the present utility model provides a technical solution: the utility model provides a denitration device of waste ammonia water thermal power plant, including steam conveying mechanism 1, fixedly connected with steam conveying pipe 2 on the steam conveying mechanism 1, steam conveying mechanism 1 one side is provided with waste ammonia water separator 4, fixedly connected with steam conveying pipe 2 between steam conveying pipe 2 and the waste ammonia water separator 4, be provided with first gas flow control valve 3 on the steam conveying pipe 2, steam conveying mechanism 1 carries steam in to the waste ammonia water separator 4 through steam conveying pipe 2, and the waste ammonia water in the waste ammonia water separator 4 volatilizees under the influence of the heat that the steam brought, first gas flow control valve 3 then can control the transportation volume of steam and change the inside temperature of waste ammonia water tower 41, thereby influence the volatilization speed of waste ammonia water.

The waste ammonia water separating device 4 comprises a waste ammonia water tower 41, a steam conveying pipe 2 is fixedly connected between the waste ammonia water tower 41 and the steam conveying mechanism 1, a cooler 42 is fixedly connected to the top end of the waste ammonia water tower 41, a gas-water separator 43 is fixedly connected to the top end of the cooler 42, a liquid discharge pipe 44 is arranged at the bottom end of the waste ammonia water tower 41, the cooler 42 and the gas-water separator 43 are communicated with each other, a gas collector is arranged between the waste ammonia water tower 41 and the cooler 42 and used for sucking the volatilized ammonia gas and water vapor in the waste ammonia water tower 41 into the cooler 42, the internal temperature of the cooler 42 is 70-90 ℃, the water vapor is slowly liquefied at the moment, and the liquefied temperature of the ammonia gas is-33.35 ℃, so that the ammonia gas is in a gaseous state.

The waste ammonia water separating device 4 is fixedly connected with a first conveying pipe 5, a first pressure valve 6 is arranged on the first conveying pipe 5, one end, away from the waste ammonia water separating device 4, of the first conveying pipe 5 is fixedly connected with a temperature compensator 7, the first conveying pipe 5 is fixedly connected between the gas-water separator 43 and the temperature compensator 7, the temperature compensator 7 is used for carrying out temperature compensation on ammonia so as to prevent the ammonia from liquefying, and the first pressure valve 6 is used for regulating the pressure between the gas-water separator 43 and the temperature compensator 7, so that ammonia is conveyed and kept in a constant pressure state so as to control the ammonia flow; an ammonia buffer tank 8 is arranged on one side of the temperature compensator 7, the ammonia buffer tank 8 is used for keeping the internal ammonia gas flow stable and preventing the reverse suction phenomenon, a second conveying pipe 9 is fixedly connected between the temperature compensator 7 and the ammonia buffer tank 8, a second pressure valve 10 is arranged on the second conveying pipe 9, and the second pressure valve 10 is used for adjusting the pressure between the temperature compensator 7 and the ammonia buffer tank 8 so as to keep the ammonia gas conveying in a constant pressure state to control the ammonia gas flow; the ammonia buffer tank 8 one side is provided with denitration SCR district 11, fixedly connected with ammonia conveyer pipe 12 between ammonia buffer tank 8 and the denitration SCR district 11, be provided with second gas flow control valve 13 on the ammonia conveyer pipe 12, ammonia conveyer pipe 12 carries denitration SCR district to the ammonia in the ammonia buffer tank 8 through second gas flow control valve 13, and second gas flow control valve 13 has then guaranteed the stability of ammonia in the transportation process, makes the ammonia reach the uniform velocity and carries, makes denitration work can steadily go on.

The utility model relates to a denitration device of a waste ammonia water thermal power plant, which firstly transmits steam into a waste ammonia water tower 41 in a waste ammonia water separation device 4 through a steam transmission mechanism 1, and controls the output quantity of the steam through a first gas flow control valve 3 so as to change the internal temperature of the waste ammonia water tower 41 to control the volatilization speed of waste ammonia water, wherein the maximum internal temperature of the waste ammonia water tower 41 is the same as the steam temperature of the steam transmission mechanism 1, the volatilized waste ammonia water becomes ammonia gas and water vapor, then the ammonia gas and the water vapor are collected into a cooler 42 through a gas collector, the internal temperature of the cooler 42 is 70-90 ℃, the water vapor is gradually liquefied at the moment, and the liquefaction temperature of the ammonia gas is minus 33.35 ℃, therefore, the ammonia is in a gaseous state, then the condensed steam is discharged through the liquid discharge pipe 44 through the gas-water separator 43, the ammonia is conveyed to the inside of the temperature compensator 7 under the action of the first pressure valve 6, the temperature compensator 7 is used for carrying out temperature compensation on the ammonia to avoid liquefaction of the ammonia, the stability of the ammonia is kept, then the ammonia is conveyed to the ammonia buffer tank 8 under the action of the second pressure valve 10, the ammonia buffer tank 8 can keep the internal ammonia flow stable, the reverse suction phenomenon is prevented from being generated, and finally the ammonia buffer tank 8 continuously and stably conveys the ammonia to the denitration SCR region 11 through the second gas flow control valve 13 for denitration. Compared with the existing denitration device for the waste ammonia thermal power plant, the denitration device provided by the utility model has the advantages that the treatment problem of waste ammonia is solved, the environment is protected, waste is changed into valuable, the resources are reused, and the energy loss and the comprehensive cost in the denitration work are reduced.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a waste ammonia thermal power plant denitrification facility, includes steam conveying mechanism (1), a serial communication port, fixedly connected with steam conveying pipe (2) on steam conveying mechanism (1), be provided with first gas flow control valve (3) on steam conveying pipe (2), one end fixedly connected with waste ammonia water separator (4) of steam conveying mechanism (1) are kept away from to steam conveying pipe (2), fixedly connected with first conveyer pipe (5) on waste ammonia water separator (4), be provided with first pressure valve (6) on first conveyer pipe (5), one end fixedly connected with temperature compensator (7) of waste ammonia water separator (4) are kept away from to first conveyer pipe (5), one side of temperature compensator (7) is provided with ammonia buffer tank (8), fixedly connected with second conveyer pipe (9) between temperature compensator (7) and ammonia buffer tank (8), be provided with second pressure valve (10) on second conveyer pipe (9), ammonia buffer tank (8) one side is provided with first conveyer pipe (5), one end fixedly connected with temperature compensator (7) is provided with ammonia buffer tank (11) and ammonia buffer tank (12), one end fixedly connected with ammonia buffer tank (12) between ammonia buffer tank (12) and the ammonia buffer tank (12).

2. The denitration device of the waste ammonia thermal power plant according to claim 1, wherein the waste ammonia water separation device (4) comprises a waste ammonia water tower (41), a cooler (42) is fixedly connected to the top end of the waste ammonia water tower (41), a gas-water separator (43) is fixedly connected to the top end of the cooler (42), and a liquid discharge pipe (44) is arranged at the bottom end of the waste ammonia water tower (41).

3. The denitration device of the waste ammonia thermal power plant according to claim 2, wherein the waste ammonia water tower (41), the cooler (42) and the gas-water separator (43) are all communicated with each other.

4. The denitration device of a waste ammonia thermal power plant according to claim 2, wherein the steam delivery pipe (2) is fixedly connected between the waste ammonia water tower (41) and the steam delivery mechanism (1), and the first delivery pipe (5) is fixedly connected between the gas-water separator (43) and the temperature compensator (7).

5. The denitration device of a waste ammonia thermal power plant according to claim 1, wherein the first pressure valve (6) is used for adjusting the pressure between the gas-water separator (43) and the temperature compensator (7) to maintain the ammonia gas transportation in a constant pressure state to control the ammonia gas flow rate, and the second pressure valve (10) is used for adjusting the pressure between the temperature compensator (7) and the ammonia buffer tank (8) to maintain the ammonia gas transportation in a constant pressure state to control the ammonia gas flow rate.

6. The denitration device of a waste ammonia thermal power plant according to claim 1, wherein the temperature compensator (7) is used for temperature compensation of ammonia gas to avoid liquefaction of ammonia gas.

7. The denitration device of the waste ammonia thermal power plant according to claim 1, wherein the ammonia buffer tank (8) is used for keeping the internal ammonia gas flow stable and preventing the occurrence of a suck-back phenomenon.