CN214936095U - Skid-mounted block device for preparing ammonia by hydrolyzing conventional urea - Google Patents

Abstract

The utility model discloses a conventional urea system ammonia sled piece device of hydrolysising belongs to flue gas denitration technical field, the difficult formation of urea system of hydrolysising among the prior art set sled piece device, rare ammonia air cleanliness factor is low, the poor problem of resource cyclic utilization, including connecting in proper order the dissolving tank on sled dress base, the buffer memory jar, hydrolysis reactor and ammonia mixer, the buffer memory jar is connected to dissolving tank one side, hydrolysis reactor is connected to the buffer memory jar opposite side, hydrolysis reactor one end is equipped with the ammonia export, ammonia mixer top and ammonia export are linked together, the heat exchanger is connected to lateral part one end, the other end is equipped with the nozzle. The utility model discloses to dissolve jar, buffer memory jar, hydrolysis reactor and ammonia blender an organic whole and set up in sled dress base surface, form urea and dissolve and store and hydrolyze and mix ammonia modular device, effectively utilize the high temperature flue gas through the heat exchanger, for urea hydrolyzes and provides the high temperature heat source, and to the cold air edulcoration, improve the cleanliness factor of ammonia output.

Description

Skid-mounted block device for preparing ammonia by hydrolyzing conventional urea

Technical Field

The utility model belongs to the technical field of the flue gas denitration, specifically speaking especially relates to a conventional urea system ammonia sled piece device of hydrolysising.

Background

In a system for carrying out denitration treatment on flue gas, ammonia is a common reducing agent, the removal efficiency of nitric oxide in the flue gas is highest, the ammonia adopted in the system can be from liquid ammonia, ammonia water and urea, and the preparation of ammonia by hydrolyzing stable and nontoxic urea is an ideal preparation method. Common urea system ammonia system of hydrolysising includes the urea dissolving tank, the urea holding vessel, urea hydrolysis reactor and ammonia blender, and each reactor all is connected with steam heater, utilize steam to heat urea solution and hydrolyze, this system need include steam system, the temperature and pressure reduction system, relevant equipment such as drain trap, the degree of assemblization is low, it is high to the installation requirement, direct utilization cold air dilutes when the ammonia dilutes simultaneously, the ammonia very easily carries the dust after diluting, cause the dust of spouting ammonia grid mouth to pile up, influence the denitration effect.

Disclosure of Invention

The utility model aims at providing a to the not enough of prior art existence, provide an easily form set ization sled piece device, rare ammonia air cleanliness factor height, but resource cyclic utilization's conventional urea system ammonia sled piece device of hydrolysising.

In order to realize the technical purpose, the utility model discloses the technical scheme that conventional urea hydrolysis ammonia making sled piece device adopted does:

a skid-mounted device for preparing ammonia by hydrolyzing conventional urea comprises a dissolving tank, a buffer tank, a hydrolysis reactor and an ammonia mixer which are sequentially connected onto a skid-mounted base, wherein the top of the dissolving tank is provided with a feed hopper with a flow plate, the inner side of the feed hopper is provided with an exhaust fan communicated with the dissolving tank, one side of the dissolving tank is provided with an inlet, the other side of the dissolving tank is connected with the buffer tank through a liquid outlet pipe, the other side of the buffer tank is connected with the hydrolysis reactor through a conveying pipe, the hydrolysis reactor comprises a cylinder body, one end of the surface of the cylinder body is provided with a urea solution inlet communicated with the conveying pipe, one end of the top of the cylinder body is provided with a catalyst inlet, the other end of the top of the cylinder body is provided with an ammonia outlet, one end of the waist of the cylinder body is provided with an overflow outlet, the other end of the ammonia mixer is provided with a high-temperature inlet, the top of the ammonia mixer is communicated with the ammonia outlet through a pipeline, and one end of the side part is connected with a heat exchanger, the other end is provided with a nozzle for spraying ammonia gas to the ammonia spraying grid, the tube pass inlet of the heat exchanger is connected with a fan, the tube pass outlet is communicated with an ammonia gas mixer, the shell pass inlet of the heat exchanger is connected with an outlet flue of the coal economizer, and the shell pass outlet is connected with the high-temperature injection port.

Preferably, the top of the dissolving tank is provided with a stirrer for improving the mixing degree of urea, and a first heating pipe for accelerating the mixing of urea is arranged inside the dissolving tank.

Preferably, a second heating pipe for maintaining the internal temperature is arranged in the buffer tank.

Preferably, the dissolving tank and the buffer tank are both provided with a liquid level display column and a thermometer.

Preferably, the hydrolysis reactor is further provided with a pressure gauge and a safety valve.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model integrally arranges the dissolving tank, the buffer tank, the hydrolysis reactor and the ammonia mixer on the surface of the skid-mounted base to form a urea dissolving, storing, hydrolyzing and ammonia mixing modular device, thereby omitting a complex pipeline of a steam system and being beneficial to forming an integrated, complete in function and compact and reasonable in arrangement;

2. the utility model utilizes the heat exchanger to dilute and heat the cold air, so that dust particles in the cold air are separated and discharged, the cleanliness of the hot air for diluting ammonia is improved, and the problem that the dust in the cold air is accumulated on the surface of the ammonia spraying grid to influence the denitration effect is avoided;

3. the utility model discloses introduce hydrolysis reactor with the high temperature flue gas after using in the ammonia mixer, realize the cyclic utilization of resource when making urea hydrolyze fast.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural diagram of the hydrolysis reactor of the present invention.

In the figure: 1. the base is skid-mounted; 2. a dissolving tank; 3. a buffer tank; 4. a hydrolysis reactor; 5. an ammonia mixer; 6, a flow plate; 7. a feed hopper; 8. a liquid inlet; 9. a liquid outlet pipe; 10. a delivery pipe; 11. a barrel; 12. a urea solution input port; 13. a catalyst injection port; 14. an ammonia gas outlet; 15. an overflow outlet; 16. a high temperature injection port; 17. a heat exchanger; 18. a nozzle; 19. a fan; 20. a stirrer; 21. a first heating pipe; 22. a second heating pipe; 23. a liquid level display column; 24. a thermometer; 25. a pressure gauge; 26. a safety valve.

Detailed Description

The invention will be further explained with reference to the drawings and the detailed description below:

as shown in fig. 1-2, a conventional urea hydrolysis ammonia-making skid block device comprises a dissolving tank 2, a buffer tank 3, a hydrolysis reactor 4 and an ammonia mixer 5 which are sequentially connected on a skid-mounted base 1, wherein the dissolving tank 2 is used for mixing and dissolving urea and water, a feed hopper 7 with a flow plate 6 is arranged at the top of the dissolving tank 2, an exhaust fan 8 communicated with the dissolving tank 2 is arranged on the inner side of the feed hopper 7, a liquid inlet 8 is arranged at one side of the dissolving tank 2, the other side of the dissolving tank is connected with the buffer tank 3 through a liquid outlet pipe 9, the buffer tank 3 is used for temporarily storing the dissolved urea solution, the other side of the buffer tank is connected with the hydrolysis reactor 4 through a conveying pipe 10, the hydrolysis reactor 4 is used for hydrolyzing the urea solution into ammonia, the hydrolysis reactor 4 comprises a cylinder body 11, a urea solution inlet 12 communicated with the conveying pipe 10 is arranged at one end of the surface of the cylinder body 11, the ammonia gas mixing device is characterized in that a catalyst injection port 13 is formed in one end of the top of the cylinder 11, an ammonia gas outlet 14 is formed in the other end of the top of the cylinder 11, an overflow port 15 is formed in one end of the waist of the cylinder 11, a high-temperature injection port 16 is formed in the other end of the waist of the cylinder 11, the ammonia gas mixer 5 is used for mixing and diluting ammonia gas, the top of the ammonia gas mixer 5 is communicated with the ammonia gas outlet 14 through a pipeline, one end of the side portion of the ammonia gas mixer is connected with a heat exchanger 17, a nozzle 18 for spraying ammonia gas into an ammonia spraying grid is formed in the other end of the ammonia gas mixer, a tube side inlet of the heat exchanger 17 is connected with a fan 19, a tube side outlet of the ammonia gas mixer 5 is communicated with a shell side inlet of the heat exchanger 17 and a flue of an economizer, and the shell side outlet is connected with the high-temperature injection port 16. Wherein, will dissolve jar 2, buffer tank 3, hydrolysis reactor 4 and ammonia gas blender 5 set in an organic whole to form urea hydrolysis sled piece device, make the function set. Simultaneously through setting up heat exchanger 17, effectively utilize the high temperature flue gas, provide the high temperature heat source for urea hydrolyzation, and to the edulcoration of cold air, improve the cleanliness factor that the ammonia exported.

The top of dissolving tank 2 is equipped with agitator 20 that improves the urea degree of mixing, and dissolving tank 2 is inside to be equipped with the first heating pipe 21 that accelerates the urea and mix, be equipped with the second heating pipe 22 that keeps inside temperature in the buffer tank 3.

The dissolving tank 2 and the buffer tank 3 are both provided with a liquid level display column 23 and a thermometer 24, and the hydrolysis reactor 4 is provided with a pressure gauge 25 and a safety valve 26. The reaction condition is monitored in real time by arranging the liquid level display column 23 and the thermometer 24, the first heating pipe 21 and the second heating pipe 22 are effectively controlled, and the safety of the internal pressure of the hydrolysis reactor 4 is ensured by arranging the pressure gauge 25 and the safety valve 26.

The utility model discloses during operation, put into feeder hopper 7 with dry urea, through the dry urea input of flow plate 6 control, add deionized water by inlet 8 simultaneously, start agitator 20 and first heating pipe 21, make the urea granule dissolve into urea solution rapidly, simultaneously through thermometer 24 and the liquid level display post 23 monitoring dissolving the inside condition of dissolving tank 2 on dissolving tank 2, in time control the opening and closing of first heating pipe 21, carry to the buffer tank 3 in order to wait to hydrolyze through drain pipe 9 after the urea granule dissolves, simultaneously through thermometer 24 and the liquid level display post 23 monitoring the temperature maintenance condition of solution in the buffer tank 3 on the buffer tank 3, in time control second heating pipe 22 keeps warm, solution in the buffer tank 3 is carried to hydrolysis reactor 4 in through conveyer pipe 10, to throwing into catalyst such as ammonium dihydrogen phosphate in the hydrolysis reactor 4 and accelerating urea hydrolysis, the ammonia that produces gets into ammonia blender 5 by ammonia outlet 14, meanwhile, the fan 19 introduces cold air into the heat exchanger 17, the pipe pass is carried out, flue gas of an outlet flue of the economizer enters the heat exchanger 17, the shell pass is carried out, internal particles of the cold air are separated out after heat exchange to form thin hot air, the thin hot air further enters the ammonia gas mixer 5 to dilute ammonia gas, the flue gas still has certain high temperature after temperature reduction, and the flue gas enters from the high-temperature injection port 16 of the hydrolysis reactor 4 to provide a heat source for urea hydrolysis, so that the flue gas heat resource is recycled.

In summary, the present invention is only a preferred embodiment, and is not intended to limit the scope of the present invention, and all equivalent changes and modifications in the shape, structure, characteristics and spirit of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims (5)

1. The utility model provides a conventional urea hydrolysis ammonia skid device which characterized in that: comprises a dissolving tank, a buffer tank, a hydrolysis reactor and an ammonia mixer which are sequentially connected on a skid-mounted base, wherein the top of the dissolving tank is provided with a feed hopper with a flow plate, the inner side of the feed hopper is provided with an exhaust fan communicated with the dissolving tank, one side of the dissolving tank is provided with a liquid inlet, the other side of the dissolving tank is connected with the buffer tank through a liquid outlet pipe, the other side of the buffer tank is connected with the hydrolysis reactor through a conveying pipe, the hydrolysis reactor comprises a cylinder body, one end of the surface of the cylinder body is provided with a urea solution input port communicated with the conveying pipe, one end of the top of the cylinder body is provided with a catalyst injection port, the other end of the top of the cylinder body is provided with an ammonia outlet, one end of the waist of the cylinder body is provided with an overflow port, the other end of the waist of the cylinder body is provided with a high-temperature injection port, the top of the ammonia mixer is communicated with the ammonia outlet through a pipeline, one end of a heat exchanger is connected with the other end of the ammonia nozzle for spraying ammonia to an ammonia spraying grid, the heat exchanger is characterized in that a tube pass inlet of the heat exchanger is connected with a fan, a tube pass outlet of the heat exchanger is communicated with an ammonia mixer, a shell pass inlet of the heat exchanger is connected with an outlet flue of the economizer, and a shell pass outlet of the heat exchanger is connected with a high-temperature injection opening.

2. The conventional urea hydrolysis ammonia production skid device as set forth in claim 1, wherein: the dissolving tank top is equipped with the agitator that improves the urea degree of mixing, and dissolving tank inside is equipped with the first heating pipe that accelerates the urea and mix.

3. The conventional urea hydrolysis ammonia production skid device as set forth in claim 1, wherein: and a second heating pipe for keeping the internal temperature is arranged in the cache tank.

4. The conventional urea hydrolysis ammonia production skid device as set forth in claim 1, wherein: and the dissolving tank and the buffer tank hydrolysis reactor are respectively provided with a liquid level display column and a thermometer.

5. The conventional urea hydrolysis ammonia production skid device as set forth in claim 4, wherein: and the hydrolysis reactor is also provided with a pressure gauge and a safety valve.

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