CN211078494U - Urea catalytic hydrolysis ammonia production equipment - Google Patents
Urea catalytic hydrolysis ammonia production equipment Download PDFInfo
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- CN211078494U CN211078494U CN201922011548.7U CN201922011548U CN211078494U CN 211078494 U CN211078494 U CN 211078494U CN 201922011548 U CN201922011548 U CN 201922011548U CN 211078494 U CN211078494 U CN 211078494U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
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Abstract
The equipment comprises a raw material dissolving tank, a raw material storage tank, a raw material dissolving pump, a raw material delivery pump, a reactor, a coil type heat exchanger, a product gas hood barrel, a product gas separation baffle, a sprayer, a steam-water separator and the like. The product gas hood cylinder is arranged on the periphery of the U-shaped coil type heat exchanger to form a sleeve type structure; the product gas separation baffle is arranged right above the product gas hood cylinder. The sprayer is arranged above the product gas separation baffle and is positioned in a space between the product gas hood cylinder and the inner wall surface of the reactor. Because the utility model discloses set up a product gas hood section of thick bamboo, product gas separation baffle and catch water, adopted homogeneous phase catalyst, raw materials to spray simultaneously and indirect heating combined together's technology, effectively strengthened the feed liquid disturbance in the reactor, made heat transfer, mass transfer ability show the reinforcing, it is fast to have reaction rate, advantages such as raw materials conversion rate height to further reduce the energy consumption, improved the high-usage of equipment.
Description
Technical Field
The utility model relates to an utilize equipment of urea system ammonia especially relates to equipment of urea catalysis hydrolysis system ammonia, belongs to chemical material preparation technical field.
Background
The urea hydrolysis reactor is the core equipment of the project of changing liquid ammonia into urea for flue gas denitration in a thermal power plant, and the performance of the urea hydrolysis reactor determines the control quality, energy consumption and operation reliability of a denitration system after modification. The current commercially applied ammonia preparation technology by flue gas denitration and hydrolysis mainly comprises the common urea hydrolysis technology and the urea catalytic hydrolysis ammonia preparation technology, and the common hydrolysis technology has the defects of low reaction speed, long response time, large volume (original belt buffer tank), serious corrosion and the like. The existing urea catalytic hydrolysis is concerned by adding a catalyst on the basis of the common hydrolysis technology, so that the reaction speed can be greatly improved, the corrosion can be reduced, the volume can be reduced, the energy consumption can be reduced, and the urea utilization rate can be improved. Most of domestic manufacturers adopt a urea catalytic hydrolysis technology, but the urea catalytic hydrolysis technology adopts a liquid-phase full-mixing reaction, only utilizes a simple coil heat exchanger, carries out heat exchange through a coil, belongs to a static mixing reaction, cannot carry out sufficient heat exchange and maximally utilizes energy, so that the investment and the energy consumption are high, and the urea catalytic hydrolysis technology needs to be further technically improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a novel urea catalysis hydrolysis ammonia plant, make its further reduction energy consumption, the energy saving for reaction rate, improve equipment's utilization ratio to prior art not enough and defect.
The technical scheme of the utility model as follows:
a urea catalytic hydrolysis ammonia production device comprises a raw material dissolving tank, a raw material storage tank, a raw material dissolving pump, a raw material delivery pump, a reactor, a drain tank and a temperature and pressure reducing device; a U-shaped coil heat exchanger is arranged in the reactor, a steam outlet pipeline in the U-shaped coil heat exchanger is divided into two paths, one path enters the coil heat exchanger in the raw material storage tank, and the outlet of the heat exchanger is connected with a drain tank; the other path is connected with a steam inlet at the bottom of the raw material dissolving tank; the method is characterized in that: the apparatus also includes a product gas hood and a product gas separation baffle mounted inside the reactor; the product gas hood cylinder is arranged on the periphery of the U-shaped coil type heat exchanger to form a sleeve type structure; the product gas separation baffle is arranged right above the product gas hood cylinder.
Among the above-mentioned technical scheme, its characterized in that: the height of the product gas hood cylinder is as high as that of the U-shaped coil type heat exchanger; the sectional area of the product gas separation baffle is the same as that of the product gas hood cylinder.
The utility model discloses another technical characteristic of equipment is: the equipment comprises a sprayer which is arranged above the product gas separation baffle and is positioned in a space between the product gas hood cylinder and the inner wall surface of the reactor; the outlet of the raw material storage tank is communicated with the inlet of the sprayer through a pipeline and a raw material delivery pump.
The utility model discloses another technical characteristic of equipment is, its characterized in that: a steam-water separator is arranged at the top outlet of the reactor.
Compared with the prior art, the utility model, ① the utility model discloses a U type coil heat exchanger has arranged all around outward the product gas hood section of thick bamboo, product gas hood section of thick bamboo height and U type coil heat exchanger height are the same height, temperature is high around U type coil heat exchanger, the catalyst gathering is around the heat exchanger, here with urea fast reaction generate product gas ammonia and carbon dioxide, product gas is toward outer diffusion, product gas hood section of thick bamboo external temperature is low, the hot-fluid flows up, the cold fluid flows down, increase the solution disturbance, be favorable to the reaction to go on sooner ② U type coil heat exchanger and product gas hood section of thick bamboo upper portion set up product gas separation baffle, this filter baffle is directly over the heat exchanger, its sectional area is the same with product gas hood section of thick bamboo, the product gas that produces presss from both sides miscellaneous liquid material and rises and can filter some liquid material through the baffle, carry out gas-liquid separation once, ③ sets up the spray thrower in the middle top of product gas and reactor, this spray thrower position is higher than product gas separation baffle, urea solution passes through product gas to the hydrolyzer after the blowout, accept a part in this heat of reaction time, the heated time is shortened.
Drawings
FIG. 1 is a schematic diagram of the structure principle of an embodiment of a novel ammonia production device by urea catalytic hydrolysis provided by the present invention.
In the figure: 1-raw material dissolving tank; 2-a drain tank; 3-a raw material storage tank; 4-raw material dissolving pump; 5-a raw material delivery pump; 6-temperature and pressure reduction device; 7-a sprayer; 8-U-shaped coil type heat exchanger; 9-product gas hood cylinder; 10-steam-water separator; 11-a reactor; 12-product gas separation baffle.
Detailed Description
The structure, principle and operation of the present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of the structural principle of an embodiment of a novel urea catalytic hydrolysis ammonia production device provided by the utility model, which comprises a raw material dissolving tank 1, a drain tank 2, a raw material storage tank 3, a raw material dissolving pump 4, a raw material delivery pump 5, a reactor 11, a temperature and pressure reducing device 6, a sprayer 7, a U-shaped coil heat exchanger 8, a product gas hood 9, a product gas separation baffle 12, a steam-water separator 10, and corresponding pipelines and valves; the product gas hood cylinder 9 is connected with the reactor 11 in a welding mode; the product gas separation baffle 12 is fixed on the inner wall surface of the reactor; the product gas hood cylinder 9 is arranged on the periphery of the U-shaped coil type heat exchanger 8 to form a sleeve type structure; the product gas separation baffle 12 is arranged directly above the product gas hood canister 9. Preferably, the height of the product gas hood cylinder 9 is the same as that of the U-shaped coil type heat exchanger 8; the sectional area of the product gas separation baffle 12 is the same as the sectional area of the product gas hood canister.
A product gas hood cylinder 9 is arranged at the periphery of the U-shaped coil type heat exchanger 8, and a product gas separation baffle plate 12 is arranged at the upper parts of the U-shaped coil type heat exchanger 8 and the product gas hood cylinder 9; because the temperature around the U-shaped coil heat exchanger 8 is high, the catalyst is gathered around the heat exchanger, and the catalyst and urea react rapidly at the heat exchanger to generate ammonia gas and carbon dioxide; the product gas diffuses outwards, the external temperature of the product gas hood cylinder is low, and cold and hot fluids are mixed, so that the disturbance of feed liquid can be increased, and the reaction can be carried out more quickly. The product gas generated at the moment is mixed with liquid substances, and the liquid substances can be partially filtered out by the separation baffle plate when rising, so that the gas and the liquid are separated at one time.
The sprayer 7 is arranged above the product gas separation baffle 12 and is positioned in a space between the product gas hood cylinder and the inner wall surface of the reactor; the outlet of the raw material storage tank 3 is communicated with the inlet of the sprayer 7 through a pipeline and a raw material delivery pump 5. The position of the sprayer 7 is higher than the product gas separation baffle 12, the urea solution drops to the bottom of the reactor through the product gas after being sprayed out from the sprayer, and the urea solution receives a part of heat in the process, so that the heating time is shortened, and the reaction is accelerated.
The steam-water separator 10 is fixed at the outlet of the reactor, and aims to perform secondary gas-liquid separation on product gas. The steam-water separator 10 may be a corrugated steam-water separator.
A steam outlet pipeline in the U-shaped coil type heat exchanger 8 is divided into two paths, one path enters the coil type heat exchanger in the raw material storage tank 3, and the outlet of the heat exchanger is connected with the drain tank 2; the other path is connected with a steam inlet at the bottom of the raw material dissolving tank 1.
The technological process of the equipment is as follows:
1) the reactor is filled with an acidic liquid catalyst taking phosphate as a carrier, and the filling amount is 5%/m3～15％/m3(ii) a Urea is filled into a dissolving tank 1, dissolved by desalted water and heated and dissolved by steam; the urea solution is delivered into a urea storage tank 3 by a raw material dissolving pump 4 and then sprayed into a reactor 11 by a delivery pump 5 through a sprayer 7, wherein the feeding mass percentage of the urea solution is 30-70%, and the temperature is 40-80 ℃;
2) reducing the temperature and the pressure of steam with the pressure of 0.6-0.8 MPa and the temperature of 160-180 ℃ through a temperature and pressure reducer (6), then entering a U-shaped coil type heat exchanger 8, and indirectly heating urea liquid in a reactor, wherein the pressure in the reactor is 0.35-0.55 MPa, and the reaction temperature is 130-145 ℃;
3) the heated waste heat steam is divided into two paths from the reactor: one path enters a raw material storage tank 3 for indirect heat exchange, the temperature of the heat-preservation urea solution is between 40 and 80 ℃, the other path is connected with a steam inlet at the bottom of a raw material dissolving tank 1 for dissolving urea, and the temperature is between 40 and 80 ℃; an outlet of the coil type heat exchanger in the raw material storage tank 3 is connected with the drain tank 2, and the drain is recovered;
4) the catalytic hydrolysis reaction is carried out in the reactor 11, the catalyst reacts with the urea solution near the pipe wall of the U-shaped coil heat exchanger 8, the product gas ammonia and carbon dioxide generated after the reaction diffuse outwards, the cold fluid sprayed by the sprayer 7 enters the product gas hood cylinder 9, the hot fluid flows upwards, the cold fluid flows downwards, the solution disturbance is increased, and the reaction can be carried out more quickly.
5) Liquid drops carried by the product gas pass through the product gas separation baffle 12 to carry out primary gas-liquid separation under the action of gravity, and when the liquid drops pass through the steam-water separator 10 at the outlet of the reactor, secondary gas-liquid separation is carried out, and the product gas flows out from the outlet of the reactor after the secondary separation.
The following examples are given to further illustrate the invention;
table 1: structural parameters
Table 2: reaction process parameters
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Claims (4)
1. A urea catalytic hydrolysis ammonia production device comprises a raw material dissolving tank (1), a raw material storage tank (3), a raw material dissolving pump (4), a raw material delivery pump (5), a reactor (11), a drain tank (2) and a temperature and pressure reducing device (6); a U-shaped coil heat exchanger (8) is arranged in the reactor, a steam outlet pipeline in the U-shaped coil heat exchanger (8) is divided into two paths, one path enters the coil heat exchanger in the raw material storage tank (3), and the outlet of the heat exchanger is connected with the drain tank (2); the other path is connected with a steam inlet at the bottom of the raw material dissolving tank (1); the method is characterized in that: the apparatus further comprises a product gas hood (9) and a product gas separation baffle (12) mounted inside the reactor; the product gas hood cylinder (9) is arranged on the periphery of the U-shaped coil type heat exchanger (8) to form a sleeve type structure; the product gas separation baffle (12) is arranged right above the product gas hood cylinder (9).
2. The apparatus for producing ammonia by catalytic hydrolysis of urea according to claim 1, wherein: the height of the product gas hood cylinder (9) is the same as that of the U-shaped coil type heat exchanger (8); the sectional area of the product gas separation baffle (12) is the same as that of the product gas hood cylinder.
3. The apparatus for producing ammonia by catalytic hydrolysis of urea according to claim 1, wherein: the apparatus comprises a shower (7); the sprayer (7) is arranged above the product gas separation baffle and is positioned in a space between the product gas hood cylinder and the inner wall surface of the reactor; the outlet of the raw material storage tank (3) is communicated with the inlet of the sprayer (7) through a pipeline and a raw material delivery pump (5).
4. A plant for the production of ammonia by the catalytic hydrolysis of urea according to claim 1, 2 or 3, characterized in that: a steam-water separator (10) is arranged at the top outlet of the reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922011548.7U CN211078494U (en) | 2019-11-20 | 2019-11-20 | Urea catalytic hydrolysis ammonia production equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922011548.7U CN211078494U (en) | 2019-11-20 | 2019-11-20 | Urea catalytic hydrolysis ammonia production equipment |
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| CN211078494U true CN211078494U (en) | 2020-07-24 |
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| CN201922011548.7U Active CN211078494U (en) | 2019-11-20 | 2019-11-20 | Urea catalytic hydrolysis ammonia production equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110775986A (en) * | 2019-11-20 | 2020-02-11 | 北京新叶能源科技有限公司 | Urea catalytic hydrolysis ammonia production equipment and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110775986A (en) * | 2019-11-20 | 2020-02-11 | 北京新叶能源科技有限公司 | Urea catalytic hydrolysis ammonia production equipment and preparation method thereof |
| CN110775986B (en) * | 2019-11-20 | 2024-05-28 | 南通市新叶能源科技有限公司 | Device for preparing ammonia by catalytic hydrolysis of urea and preparation method thereof |
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Address after: 100083 1905, 19th floor, block a, building 1, yard 10, Xueqing Road, Haidian District, Beijing Patentee after: BEIJING NEW LEAF ENERGY TECHNOLOGY Co.,Ltd. Address before: 100190 Room 203, building 30, No.13, Beiertiao, Zhongguancun, Haidian District, Beijing Patentee before: BEIJING NEW LEAF ENERGY TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20210508 Address after: Room 321, 42 Guangzhou road, Nantong Development Zone, Jiangsu Province Patentee after: Nantong Xinye Energy Technology Co.,Ltd. Address before: 100083 1905, 19th floor, block a, building 1, yard 10, Xueqing Road, Haidian District, Beijing Patentee before: BEIJING NEW LEAF ENERGY TECHNOLOGY Co.,Ltd. |