CN213761839U - Vertical non-catalytic urea hydrolysis reactor for denitration - Google Patents
Vertical non-catalytic urea hydrolysis reactor for denitration Download PDFInfo
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- CN213761839U CN213761839U CN202022557931.5U CN202022557931U CN213761839U CN 213761839 U CN213761839 U CN 213761839U CN 202022557931 U CN202022557931 U CN 202022557931U CN 213761839 U CN213761839 U CN 213761839U
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Abstract
The utility model discloses a denitration is with vertical no catalysis urea hydrolysis reactor, including shell and a plurality of tubular heat exchanger, the top of shell is provided with liquid level control mouth and temperature control mouth, and the side of shell bottom is provided with the urea solution interface, and the top of shell is provided with the product discharge port, and each tubular heat exchanger inserts in the shell, and wherein, each tubular heat exchanger's high difference, this reactor practice thrift the space, and it is fast to heat up, and temperature distribution is comparatively even simultaneously, and it is comparatively convenient to use.
Description
Technical Field
The utility model belongs to the technical field of urea hydrolysis ammonia production, a vertical catalysis urea hydrolysis reactor that does not have for denitration is related to.
Background
According to the warning of dangerous chemical explosion accidents in the Lebanon port, related departments in China begin to increase supervision and control aiming at the storage and use of dangerous chemicals. Liquid ammonia adopted by the SCR denitration process of the power plant undoubtedly becomes a great hazard source, especially for the thermal power plant in the Yangtze river delta area or near the urban area. And the urea is used as a safe and cheap chemical raw material, can well replace liquid ammonia to prepare ammonia required by SCR denitration reaction, and effectively reduces the safety risk.
The existing mainstream hydrolysis reactor adopts a long-cylinder layout, and has the defects of large occupied area, slow temperature rise and unbalanced temperature distribution in a cylinder body. Especially, the large occupied area is undoubtedly a big problem for the long triangular developed areas with small size or some thermal power plants in the urban areas, and in addition, the control difficulty of the liquid level in the tank is very large for the hydrolysis reactor with the long cylinder type horizontal structure. It is known that some power plants in the above area adopt the following schemes: the hydrolysis reactor is arranged on the boiler steel frame, the urea preparation area is arranged in an empty place, the distance between the hydrolysis reactor and the urea preparation area is usually far, the pipeline is overlong under the layout, the preparation and conveying efficiency is low, the load of the boiler steel frame is greatly increased, and the use is inconvenient.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a denitration is with vertical no catalysis urea hydrolysis reactor, this reactor practices thrift the space, heaies up sooner, and temperature distribution is comparatively even simultaneously, and it is comparatively convenient to use.
In order to achieve the above object, the vertical non-catalytic urea hydrolysis reactor for denitration comprises a shell and a plurality of tubular heat exchangers, wherein the top of the shell is provided with a liquid level control port and a temperature control port, the side of the bottom of the shell is provided with a urea solution interface, the top of the shell is provided with a product discharge port, and each tubular heat exchanger is inserted into the shell, wherein the height of each tubular heat exchanger is different.
The top of the shell is composed of a plurality of arc-shaped steel plates.
The top of shell is provided with the relief valve interface.
The top of shell is provided with middle part blowdown interface, and the bottom of shell is provided with bottom blowdown interface.
The tubular heat exchanger comprises a shell and a plurality of tube bundles, wherein one end of each tube bundle is positioned in the shell, the other end of each tube bundle is inserted into the shell, the upper end part of the shell is provided with a seal head, the top of the shell is provided with a steam interface, the bottom of the shell is provided with a drainage interface, the steam interface is communicated with one end of each tube bundle, and the drainage interface is communicated with the other end of each tube bundle.
The tube bundle fixing device further comprises a positioning plate, wherein the positioning plate is located in the shell, and the tube bundles are fixed through the positioning plate.
The utility model discloses following beneficial effect has:
denitration is with vertical no catalysis urea hydrolysis reactor when concrete operation, urea solution heats the hydrolysis through tubular heat exchanger to urea solution in entering into the shell to produce the mixture of ammonia, carbon dioxide and vapor, then discharge through the product discharge port, need explain, the utility model discloses a vertical structure, wherein, each tubular heat exchanger distributes from the top down in proper order, realizes the heating to urea solution in the different regions, and the programming rate is very fast, and the heating is comparatively even, saves control simultaneously, and area is little, when actual operation, can exert oneself and the liquid level according to the difference, and nimble operating condition who switches each tubular heat exchanger, convenient to use, simple.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a shell, 2 is a seal head, 3 is an arc-shaped steel plate, 4 is a tubular heat exchanger, 5 is a positioning plate, 6 is a tube bundle, 7 is a product discharge port, 8 is a liquid level control port, 9 is a temperature control port, 10 is a steam port, 11 is a drainage port, 12 is a solution port, 13 is a middle sewage discharge port, 14 is a bottom sewage discharge port, and 15 is a safety valve port.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, vertical non-catalytic urea hydrolysis reactor for denitration include shell 1 and a plurality of tubular heat exchanger 4, the top of shell 1 is provided with liquid level control mouth 8 and temperature control mouth 9, the side of shell 1 bottom is provided with urea solution interface 12, the top of shell 1 is provided with product discharge port 7, each tubular heat exchanger 4 inserts in shell 1, wherein, each tubular heat exchanger 4's high difference.
The top of the shell 1 is composed of a plurality of arc-shaped steel plates 3; the top of the shell 1 is provided with a safety valve interface 15; the top of the shell 1 is provided with a middle sewage draining interface 13, and the bottom of the shell 1 is provided with a bottom sewage draining interface 14.
The tubular heat exchanger 4 comprises a shell and a plurality of tube bundles 6, wherein one end of each tube bundle 6 is positioned in the shell, the other end of each tube bundle 6 is inserted into the shell 1, the upper end part of the shell is provided with a seal head 2, the top of the shell is provided with a steam interface 10, the bottom of the shell is provided with a drainage interface 11, the steam interface 10 is communicated with one end of each tube bundle 6, and the drainage interface 11 is communicated with the other end of each tube bundle 6.
The utility model discloses still include locating plate 5, wherein, locating plate 5 is located shell 1, and is fixed through locating plate 5 between each tube bank 6.
Steam enters into tube bank 6 through steam interface 10 in, heats urea solution through the 6 heat exchanges of tube bank to preparation ammonia, when practical application, can reach the required temperature of reaction through the imported steam volume of interactive control according to the internal actual liquid level of jar, compares original long cartridge type tubular structure, and liquid intensifies rapidly, and liquid level control is more nimble, and area is little, practices thrift steam.
During operation, urea solution enters the shell 1 through the solution connector 12 after being configured according to a special proportion, steam (180 ℃, 0.8MPa) heats the urea solution through the tubular heat exchangers 4, the steam is switched among the tubular heat exchangers 4 according to different liquid levels in the tank body in the heating process, the reaction temperature is guaranteed, the purpose of effectively controlling and saving the steam is achieved, and CO (NH) is generated in the shell 12)2(Urea) + H2O→2NH3(Ammonia) + CO2The endothermic reaction of (1) the product is ammonia, carbon dioxide and vapor's mixture, carries to deNOx systems through product discharge port 7 through pipe-line system, when actual operation, can dismantle head 2, extracts and overhauls tube bank 6.
Claims (6)
1. The utility model provides a denitration is with vertical no catalytic urea hydrolysis reactor, its characterized in that, includes shell (1) and a plurality of tubular heat exchanger (4), and the top of shell (1) is provided with liquid level control mouth (8) and temperature control mouth (9), and the side of shell (1) bottom is provided with urea solution interface (12), and the top of shell (1) is provided with product discharge port (7), and each tubular heat exchanger (4) insert in shell (1), and wherein, the height of each tubular heat exchanger (4) is different.
2. The vertical non-catalytic urea hydrolysis reactor for denitration according to claim 1, wherein the top of the outer shell (1) is composed of a plurality of arc-shaped steel plates (3).
3. The vertical uncatalyzed urea hydrolysis reactor for denitration according to claim 1, wherein a safety valve port (15) is provided at a top of the housing (1).
4. The vertical non-catalytic urea hydrolysis reactor for denitration according to claim 1, wherein a middle sewage draining interface (13) is provided at the top of the housing (1), and a bottom sewage draining interface (14) is provided at the bottom of the housing (1).
5. The vertical non-catalytic urea hydrolysis reactor for denitration according to claim 1, wherein the tubular heat exchanger (4) comprises a shell and a plurality of tube bundles (6), wherein one end of each tube bundle (6) is located in the shell, the other end of each tube bundle (6) is inserted into the shell (1), the upper end of the shell is provided with the seal head (2), the top of the shell is provided with the steam interface (10), the bottom of the shell is provided with the hydrophobic interface (11), the steam interface (10) is communicated with one end of each tube bundle (6), and the hydrophobic interface (11) is communicated with the other end of each tube bundle (6).
6. The vertical non-catalytic urea hydrolysis reactor for denitration according to claim 1, further comprising a positioning plate (5), wherein the positioning plate (5) is located in the shell (1), and the tube bundles (6) are fixed by the positioning plate (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022557931.5U CN213761839U (en) | 2020-11-06 | 2020-11-06 | Vertical non-catalytic urea hydrolysis reactor for denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022557931.5U CN213761839U (en) | 2020-11-06 | 2020-11-06 | Vertical non-catalytic urea hydrolysis reactor for denitration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213761839U true CN213761839U (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022557931.5U Active CN213761839U (en) | 2020-11-06 | 2020-11-06 | Vertical non-catalytic urea hydrolysis reactor for denitration |
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| Country | Link |
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| CN (1) | CN213761839U (en) |
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- 2020-11-06 CN CN202022557931.5U patent/CN213761839U/en active Active
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