CN107628971B - Device and process for continuously preparing urea peroxide - Google Patents
Device and process for continuously preparing urea peroxide Download PDFInfo
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- CN107628971B CN107628971B CN201710776792.5A CN201710776792A CN107628971B CN 107628971 B CN107628971 B CN 107628971B CN 201710776792 A CN201710776792 A CN 201710776792A CN 107628971 B CN107628971 B CN 107628971B
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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
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Abstract
The invention belongs to a device for continuously preparing urea peroxide and a process thereof; the device comprises a granulation tower, wherein a tail gas outlet at the top of the granulation tower is sequentially connected with a first valve, a draught fan, a second valve and a dust gas inlet arranged at the middle lower section of a high-speed reactor through a pipeline, a liquid outlet arranged at the lower section of the high-speed reactor is sequentially connected with a third valve and a cooling crystallization tank through a pipeline, a crystal outlet of the centrifugal machine is connected with a urea peroxide storage tank through drying equipment, a liquid outlet of the centrifugal machine is sequentially connected with a liquid return tank, a fourth valve, a solution pump, a fifth valve, a liquid storage tank, a sixth valve, a raw material pump, a seventh valve, a static mixer and a liquid inlet arranged at the side surface of the upper part of the high-speed reactor through a pipeline, and a gas outlet at the top of the high-speed reactor is connected with a gas making furnace; the device has the advantages of simple structure and reasonable design, can effectively solve the problem of tail gas recovery of the prilling tower, and can improve the utilization rate of raw materials, thereby achieving the purposes of saving energy and avoiding waste.
Description
Technical Field
The invention belongs to the technical field of preparation of urea peroxide, and particularly relates to a device and a process for continuously preparing urea peroxide.
Background
At present, a large number of hydrogen peroxide and urea manufacturers exist in China, so that the two products are in a situation of being supplied and demanded, the synthesis process of the urea peroxide is relatively simple, the operation is convenient, the environment is clean, three wastes are not generated, and the raw material sources are sufficient; in the process of granulating the urea prilling tower, urea dust is inevitably generated, so that a certain amount of dust is generally entrained in tail gas of the prilling tower, especially when the production load is increased, the dust emission of the prilling tower is increased, serious pollution is caused to the environment, equipment is corroded after the dust falls, and meanwhile, the resource waste is caused. The existing treatment method simply sprays water to remove dust, a large amount of solution can be evaporated during dust removal, aerosol is formed, and the dust removal efficiency is difficult to meet the emission standard.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the device for continuously preparing urea peroxide and the process thereof, which have the advantages of simple structure, reasonable design, capability of effectively solving the problem of tail gas recovery of the prilling tower, and improvement of the utilization rate of raw materials, thereby achieving the purposes of saving energy and avoiding waste.
The purpose of the invention is realized in the following way: the device comprises a granulation tower, a tail gas outlet at the top of the granulation tower is sequentially connected with a first valve, a draught fan, a second valve and a dust gas inlet arranged at the middle lower section of a high-speed reactor through a pipeline, a liquid outlet arranged at the lower section of the high-speed reactor is sequentially connected with a third valve and a cooling crystallization tank through a pipeline, a crystal outlet of the centrifugal machine is connected with a urea peroxide storage tank through drying equipment, a liquid outlet of the centrifugal machine is sequentially connected with a liquid return tank, a fourth valve, a solution pump, a fifth valve, a liquid storage tank, a sixth valve, a raw material pump, a seventh valve, a static mixer and a liquid inlet arranged at the side surface of the upper part of the high-speed reactor, a gas outlet at the top of the high-speed reactor is connected with a gas making furnace, a rotor is arranged in the high-speed reactor, a chemical adding port is arranged at the top of the static mixer, and the liquid storage tank is connected with the raw material tank.
A process for a continuous urea peroxide production plant, the process comprising the steps of:
step one: starting the high-speed reactor, opening a first valve and a second valve, starting a draught fan, and introducing dust-containing gas at the top of the urea prilling tower into a rotor outer cavity of the high-speed reactor from tangential through a dust gas inlet by the first valve, the draught fan and the second valve, and entering a filler from the outer edge of the rotor under the action of gas pressure;
step two: simultaneously opening a sixth valve and a seventh valve, starting a raw material pump, slowly adding a stabilizing agent at a dosing port at the top of the static mixer according to the flow of the raw material pump, enabling raw materials in a raw material tank to enter the static mixer through a liquid storage tank, the sixth valve, the raw material pump and the seventh valve to be fully mixed with the stabilizing agent, enabling the materials to enter a rotor of a high-speed reactor after being fully mixed, enabling liquid to be introduced into an inner cavity of the rotor through a liquid inlet, and showering the liquid on the inner edge of the rotor through a shower nozzle; the liquid entering the rotor is acted by the filler in the rotor, the liquid is dispersed and crushed by the filler to form a great surface area which is continuously updated, and the tortuous flow passage accelerates the update of the surface of the liquid and accelerates the synthesis of urea peroxide; the liquid after reaction is thrown to the shell by the rotor and enters the lower section of the high-speed reactor after being collected;
step three: opening a third valve, starting a centrifugal machine and drying equipment, enabling reacted liquid to enter a cooling crystallization tank through a liquid outlet of a high-speed reactor and the third valve, and exchanging heat with low-quality cold energy of liquid nitrogen washing to crystallize and separate urea peroxide;
step four: cooling and crystallizing, conveying to a centrifugal machine, carrying out solid-liquid separation by the centrifugal machine, directly conveying the separated solid to a drying device through a crystal discharge port of the centrifugal machine for low-temperature drying to obtain a urea peroxide product, and simultaneously, flowing the separated liquid into a liquid return tank for standby;
step five: opening a fourth valve and a fifth valve, starting a solution pump, and enabling separated liquid to enter a liquid storage tank through a liquid return tank, the fourth valve, the solution pump and the fifth valve, and mixing with raw materials in a raw material tank for recycling;
step six: and step two, directly discharging or conveying the gas reacted in the high-speed reactor to a gas making furnace for combustion supporting through a gas outlet at the top of the high-speed reactor, and improving the heat value of the gas making furnace.
The invention has the advantages of simple structure and reasonable design, can effectively solve the problem of tail gas recovery of the prilling tower, and improves the utilization rate of raw materials so as to achieve the purposes of saving energy and avoiding waste.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
For a clearer understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals refer to like parts throughout the various views. For simplicity of the drawing, only the parts relevant to the invention are schematically shown in each drawing, and they do not represent the actual structure thereof as a product.
As shown in fig. 1, the invention is a device for continuously preparing urea peroxide and a process thereof, wherein, the device part comprises a prilling tower 1, a tail gas outlet at the top of the prilling tower 1 is sequentially connected with a first valve 2, a draught fan 3, a second valve 4 and a dust gas inlet 6 arranged at the lower middle section of a high-speed reactor 5 through pipelines, a liquid outlet arranged at the lower section of the high-speed reactor 5 is sequentially connected with a third valve 7 and a cooling crystallization tank 8 through pipelines, a crystal outlet of the centrifugal machine 9 is connected with a urea peroxide storage tank 11 through a drying device 10, a liquid outlet of the centrifugal machine 9 is sequentially connected with a liquid return tank 12, a fourth valve 13, a solution pump 14, a fifth valve 15, a liquid storage tank 16, a sixth valve 17, a raw material pump 18, a seventh valve 19, a static mixer 20 and a liquid inlet 21 arranged at the upper side surface of the high-speed reactor 5, a gas outlet at the top of the high-speed reactor 5 is connected with a gas making furnace 22, a rotor 23 is arranged in the high-speed reactor 5, a liquid inlet 24 is arranged at the top of the static mixer 20, and a raw material tank 25 is connected with the liquid storage tank 16.
A process for a continuous urea peroxide production plant, the process comprising the steps of:
step one: starting the high-speed reactor 5, opening the first valve 2 and the second valve 4, starting the induced draft fan 3, and introducing dust-containing gas at the top of the urea prilling tower 1 into the rotor outer cavity of the high-speed reactor 5 from the tangential direction through the first valve 2, the induced draft fan 3 and the second valve 4 through the dust gas inlet 6, and entering the filler from the outer edge of the rotor under the action of gas pressure;
step two: simultaneously opening a sixth valve 17 and a seventh valve 19, starting a raw material pump 18, slowly adding a stabilizing agent at a dosing port 24 at the top of a static mixer 20 according to the flow of the raw material pump 18, enabling raw materials in a raw material tank 25 to enter the static mixer 20 through a liquid storage tank 16, the sixth valve 17, the raw material pump 18 and the seventh valve 19 to be fully mixed with the stabilizing agent, enabling the materials to enter a rotor 23 of a high-speed reactor 5 after being fully mixed, enabling liquid to be introduced into an inner cavity of the rotor through a liquid inlet, and spraying the liquid on the inner edge of the rotor through a spray nozzle; the liquid entering the rotor is acted by the filler in the rotor, the liquid is dispersed and crushed by the filler to form a great surface area which is continuously updated, and the tortuous flow passage accelerates the update of the surface of the liquid and accelerates the synthesis of urea peroxide; the reacted liquid is thrown to the shell by the rotor 23 and enters the lower section of the high-speed reactor 5 after being collected;
step three: opening a third valve 7, starting a centrifugal machine 9 and drying equipment 10, enabling reacted liquid to enter a cooling crystallization tank 8 through a liquid outlet of the high-speed reactor 5 and the third valve 7, and exchanging heat with low-quality cold energy of liquid nitrogen washing to separate urea peroxide crystals out;
step four: cooling and crystallizing, conveying to a centrifugal machine 9, carrying out solid-liquid separation by the centrifugal machine, directly conveying the separated solid to a drying device 10 through a centrifugal machine crystal discharge port for low-temperature drying to obtain a urea peroxide product, and simultaneously, flowing the separated liquid into a liquid return tank 12 for standby;
step five: opening the fourth valve 13 and the fifth valve 15, starting the solution pump 14, and enabling the separated liquid to enter the liquid storage tank 16 through the liquid return tank 12, the fourth valve 13, the solution pump 14 and the fifth valve 15 to be mixed with the raw materials in the raw material tank 25 for recycling;
step six: and in the second step, the gas after the reaction in the high-speed reactor 5 is directly discharged or conveyed to the gas making furnace 22 for combustion supporting through a gas outlet at the top of the high-speed reactor 5, so that the heat value of the gas making furnace 22 is improved.
The technical solutions of the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention.
Examples
The utility model provides a device of continuity preparation urea peroxide, including prilling tower 1, the tail gas export at prilling tower 1 top links to each other with first valve 2 through the pipeline in proper order, draught fan 3, second valve 4 and establish the dust gas import 6 of hypomere in high-speed reactor 5, establish the liquid export at the hypomere of high-speed reactor 5 and link to each other with third valve 7 and cooling crystallizer 8 and centrifuge 9 through the pipeline in proper order, centrifuge 9's crystal export links to each other with urea peroxide storage tank 11 through drying equipment 10, centrifuge 9's liquid outlet links to each other with liquid return tank 12 through the pipeline in proper order, fourth valve 13, solution pump 14, fifth valve 15, liquid storage tank 16, sixth valve 17, raw materials pump 18, seventh valve 19, static mixer 20 and establish the inlet 21 at high-speed reactor 5 upper portion side, the gas export at high-speed reactor 5 top links to each other with make gas stove 22, the inside of high-speed reactor 5 is equipped with rotor 23, the top of static mixer 20 is equipped with charge mouth 24, liquid storage tank 16 links to each other with raw materials tank 25.
A process for a continuous urea peroxide production plant, the process comprising the steps of:
step one: starting the high-speed reactor 5, opening the first valve 2 and the second valve 4, starting the induced draft fan 3, and introducing dust-containing gas at the top of the urea prilling tower 1 into the rotor outer cavity of the high-speed reactor 5 from the tangential direction through the first valve 2, the induced draft fan 3 and the second valve 4 through the dust gas inlet 6, and entering the filler from the outer edge of the rotor under the action of gas pressure;
step two: simultaneously opening a sixth valve 17 and a seventh valve 19, starting a raw material pump 18, slowly adding a stabilizing agent at a dosing port 24 at the top of a static mixer 20 according to the flow of the raw material pump 18, enabling raw materials in a raw material tank 25 to enter the static mixer 20 through a liquid storage tank 16, the sixth valve 17, the raw material pump 18 and the seventh valve 19 to be fully mixed with the stabilizing agent, enabling the materials to enter a rotor 23 of a high-speed reactor 5 after being fully mixed, enabling liquid to be introduced into an inner cavity of the rotor through a liquid inlet, and spraying the liquid on the inner edge of the rotor through a spray nozzle; the liquid entering the rotor is acted by the filler in the rotor, the liquid is dispersed and crushed by the filler to form a great surface area which is continuously updated, and the tortuous flow passage accelerates the update of the surface of the liquid and accelerates the synthesis of urea peroxide; the reacted liquid is thrown to the shell by the rotor 23 and enters the lower section of the high-speed reactor 5 after being collected;
step three: opening a third valve 7, starting a centrifugal machine 9 and drying equipment 10, enabling reacted liquid to enter a cooling crystallization tank 8 through a liquid outlet of the high-speed reactor 5 and the third valve 7, and exchanging heat with low-quality cold energy of liquid nitrogen washing to separate urea peroxide crystals out;
step four: cooling and crystallizing, conveying to a centrifugal machine 9, carrying out solid-liquid separation by the centrifugal machine, directly conveying the separated solid to a drying device 10 through a centrifugal machine crystal discharge port for low-temperature drying to obtain a urea peroxide product, and simultaneously, flowing the separated liquid into a liquid return tank 12 for standby;
step five: opening the fourth valve 13 and the fifth valve 15, starting the solution pump 14, and enabling the separated liquid to enter the liquid storage tank 16 through the liquid return tank 12, the fourth valve 13, the solution pump 14 and the fifth valve 15 to be mixed with the raw materials in the raw material tank 25 for recycling;
step six: and in the second step, the gas after the reaction in the high-speed reactor 5 is directly discharged or conveyed to the gas making furnace 22 for combustion supporting through a gas outlet at the top of the high-speed reactor 5, so that the heat value of the gas making furnace 22 is improved.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, integrally connected, or detachably connected; or the communication between the two components is also possible; may be directly connected or indirectly connected through an intermediate medium, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to the specific circumstances. It should be noted that herein, "first", "second", etc. are used merely for distinguishing one from another, and do not denote their importance or order or the like. The above detailed description is merely for the specific description of the practical embodiments of the invention, and they are not intended to limit the scope of the invention, but all equivalent embodiments, modifications and adaptations which do not depart from the spirit of the invention are intended to be included in the scope of the invention.
Claims (1)
1. A process for the continuous preparation of urea peroxide, characterized in that: the process comprises the following steps:
step one: starting a high-speed reactor (5), opening a first valve (2) and a second valve (4), starting a draught fan (3), introducing dust-containing gas at the top of a urea prilling tower (1) into a rotor outer cavity of the high-speed reactor (5) from tangential direction through a dust gas inlet (6) by the first valve (2), the draught fan (3) and the second valve (4), and entering a filler from the outer edge of the rotor under the action of gas pressure;
step two: simultaneously, a sixth valve (17) and a seventh valve (19) are opened, a raw material pump (18) is started, a stabilizing agent is slowly added into a dosing port (24) at the top of a static mixer (20) according to the flow of the raw material pump (18), raw materials in a raw material tank (25) enter the static mixer (20) through a liquid storage tank (16), the sixth valve (17), the raw material pump (18) and the seventh valve (19) to be fully mixed with the stabilizing agent, after the materials are fully mixed, the materials enter a rotor (23) of a high-speed reactor (5), and liquid is introduced into an inner cavity of the rotor through a liquid inlet and is sprayed on the inner edge of the rotor through a spray nozzle; the liquid entering the rotor is acted by the filler in the rotor, the liquid is dispersed and crushed by the filler to form a great surface area which is continuously updated, and the tortuous flow passage accelerates the update of the surface of the liquid and accelerates the synthesis of urea peroxide; the liquid after reaction is thrown to the shell by the rotor (23) and enters the lower section of the high-speed reactor (5) after being collected;
step three: opening a third valve (7), starting a centrifugal machine (9) and drying equipment (10), enabling reacted liquid to enter a cooling crystallization tank (8) through a liquid outlet of a high-speed reactor (5) and the third valve (7), and exchanging heat with low-quality cold energy of liquid nitrogen washing to separate urea peroxide from the liquid, thereby crystallizing;
step four: cooling and crystallizing, conveying to a centrifugal machine (9), carrying out solid-liquid separation by the centrifugal machine, directly conveying the separated solid to a drying device (10) through a centrifugal machine crystal discharge hole for low-temperature drying to obtain a urea peroxide product, and simultaneously, flowing the separated liquid into a liquid return tank (12) for standby;
step five: opening a fourth valve (13) and a fifth valve (15), starting a solution pump (14), and enabling separated liquid to enter a liquid storage tank (16) through a liquid return tank (12), the fourth valve (13), the solution pump (14) and the fifth valve (15) to be mixed with raw materials in a raw material tank (25) for recycling;
step six: and in the second step, the gas after the reaction in the high-speed reactor (5) is directly discharged through a gas outlet at the top of the high-speed reactor (5) or is conveyed to the gas making furnace (22) for combustion supporting, so that the heat value of the gas making furnace (22) is improved.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710776792.5A CN107628971B (en) | 2017-08-21 | 2017-08-21 | Device and process for continuously preparing urea peroxide |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710776792.5A CN107628971B (en) | 2017-08-21 | 2017-08-21 | Device and process for continuously preparing urea peroxide |
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| CN107628971A CN107628971A (en) | 2018-01-26 |
| CN107628971B true CN107628971B (en) | 2023-09-01 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111296467B (en) * | 2020-03-30 | 2022-03-08 | 山东消博士消毒科技股份有限公司 | Compound hydrogen peroxide sterilization powder and manufacturing device thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1296968A (en) * | 1961-08-05 | 1962-06-22 | Salzgitter Ag | Urea manufacturing process |
| CN200974818Y (en) * | 2006-12-07 | 2007-11-14 | 张军保 | Gas-liquid cocurrent flow type cooling washer for carbamide granulation exhaust gas |
| CN104725281A (en) * | 2015-02-10 | 2015-06-24 | 四川美丰化工股份有限公司 | Method for producing urea peroxide |
| CN205495232U (en) * | 2016-04-06 | 2016-08-24 | 张军保 | Next door tower gas -liquid mixed -flow cooling scrubber |
| CN106693564A (en) * | 2017-02-28 | 2017-05-24 | 宜兴市压力容器厂有限公司 | Urea dust gas absorbing and purifying system |
-
2017
- 2017-08-21 CN CN201710776792.5A patent/CN107628971B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1296968A (en) * | 1961-08-05 | 1962-06-22 | Salzgitter Ag | Urea manufacturing process |
| CN200974818Y (en) * | 2006-12-07 | 2007-11-14 | 张军保 | Gas-liquid cocurrent flow type cooling washer for carbamide granulation exhaust gas |
| CN104725281A (en) * | 2015-02-10 | 2015-06-24 | 四川美丰化工股份有限公司 | Method for producing urea peroxide |
| CN205495232U (en) * | 2016-04-06 | 2016-08-24 | 张军保 | Next door tower gas -liquid mixed -flow cooling scrubber |
| CN106693564A (en) * | 2017-02-28 | 2017-05-24 | 宜兴市压力容器厂有限公司 | Urea dust gas absorbing and purifying system |
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| CN107628971A (en) | 2018-01-26 |
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