CN115430391A - Urea catalytic hydrolysis reactor with shock mounting - Google Patents
Urea catalytic hydrolysis reactor with shock mounting Download PDFInfo
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- CN115430391A CN115430391A CN202211257728.3A CN202211257728A CN115430391A CN 115430391 A CN115430391 A CN 115430391A CN 202211257728 A CN202211257728 A CN 202211257728A CN 115430391 A CN115430391 A CN 115430391A
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- reactor
- heat exchanger
- exchanger tube
- reactor main
- tube bundle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/0013—Controlling the temperature of the process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/24—Stationary reactors without moving elements inside
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/08—Preparation of ammonia from nitrogenous organic substances
- C01C1/086—Preparation of ammonia from nitrogenous organic substances from urea
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a urea catalytic hydrolysis reactor with a shock-proof device, belongs to the technical field of urea ammonia production, and solves the problems of easiness in damage, high corrosivity and low reaction conversion rate of a tube bundle in the prior art. According to the invention, the shockproof device is arranged at the tail end of the heat exchanger tube bundle, so that the heat exchanger tube bundle can be prevented from vibrating when being impacted by cold and hot flows, the problem that the heat exchanger tube bundle is damaged due to long-term vibration and the heat exchange efficiency is further reduced is solved, the gas-liquid separator is arranged at the tail section of the main body of the heat exchanger, the water content in ammonia gas is effectively reduced, the corrosivity of the ammonia gas is greatly reduced, and the ammonia water is quickly catalyzed into the ammonia gas by arranging the catalyst at the part of the gas-liquid separator, so that the reaction conversion rate of equipment is improved.
Description
Technical Field
The invention belongs to the technical field of urea ammonia production, and particularly relates to a urea catalytic hydrolysis reactor with a shock-proof device.
Background
The reducing agents used for SCR flue gas denitration generally comprise three kinds of liquid ammonia, ammonia water and urea, the liquid ammonia is a dangerous chemical, and the transportation, storage and use of the liquid ammonia have strict limits. The urea replacement upgrading and transformation technology mainly comprises two technologies, namely urea pyrolysis and urea hydrolysis, wherein the urea hydrolysis process is limited by process, pressure and temperature, intermediate products are easy to corrode and block subsequent equipment in the urea ammonia production process, and the conversion efficiency is relatively low. In addition, the uneven flow velocity of fluid is easily caused due to the heat exchange temperature difference in the urea hydrolysis process, so that the heat exchanger tube bundle vibrates, and the damage of the heat exchanger tube bundle is easily caused along with the increase of vibration times and duration, so that the heat exchange efficiency of the reactor is greatly reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the urea catalytic hydrolysis reactor with the shock-proof device, which is capable of preventing the damage of the tube bundle, has low corrosivity and high reaction conversion rate.
In order to realize the technical purpose, the urea catalytic hydrolysis reactor with the shock-proof device adopts the technical scheme that:
a urea catalytic hydrolysis reactor with a shock-proof device comprises a reactor main body, wherein a heat exchanger tube bundle is transversely arranged at the bottom end in the reactor main body, the heat exchanger tube bundle is formed by overlapping a plurality of U-shaped heat exchange tubes, the straight tube end of the heat exchanger tube bundle extends out of the reactor main body and is hermetically connected with the reactor main body, a steam inlet is formed in the upper side of the extending section of the heat exchanger tube bundle, a steam outlet is formed in the lower side of the extending section of the heat exchanger tube bundle, the surface of the tail section of the heat exchanger tube bundle is provided with the shock-proof device for preventing the heat exchanger tube bundle from vibrating, the tail part of the reactor main body is provided with an outlet pipeline, a gas-liquid separator is arranged in the outlet pipeline, the top of the outlet pipeline is provided with a product outlet, and the lower part of the gas-liquid separator is provided with a gas-liquid separation tube which is vertically arranged along the outlet pipeline and extends into the position below the axis of the reactor main body;
the utility model discloses a reactor, including the setting in the reactor main part, the setting in the shock mounting is including the lantern ring and the buckle structure of card locating heat exchanger tube bank surface in placing the reactor main part in, the lantern ring is inside to be equipped with the step that stretches out to centre of a circle direction, from top to bottom the step terminal surface difference joint has buckle structure, buckle structure includes the location axle of perpendicular to heat exchanger tube bank extending direction, straight linkage segment has been seted up to location axle front portion, and circular connection notch has been seted up on this straight linkage segment surface, circular connection notch intraoral joint has the buckle that becomes the symmetry and sets up, the surface of heat exchanger tube bank is located to buckle upper end card, and the bottom is rotated and is connected in the notch, outside protrusion back sliding connection of buckle waist is in the locating ring, place in the locating ring in the reactor main part, two the mutual conflict of buckle bottom, location afterbody is formed by two reducing cylinder end to end-to-end connections, the location axle end cover is equipped with expanding spring the other end with reactor main part inner wall is inconsistent.
Preferably, the surface of the side part of the reactor main body is respectively provided with a urea solution inlet and a demineralized water inlet, and the urea solution inlet and the demineralized water inlet are both positioned above the central axis of the reactor main body.
Preferably, a manhole is arranged at the top end of the reactor main body, a sewage draining hole is formed in the middle of the side wall of the reactor main body, and a temperature measuring hole is formed below the middle of the side wall of the reactor main body.
Preferably, the surface of the gas-liquid separator is coupled with a catalyst through a grid, and the catalyst is in a solid spherical shape or a honeycomb coal shape.
Preferably, the heat exchanger tube bundle is made of stainless steel, and the diameter of the tube bundle is 18-32 mm.
Preferably, the straight connecting section of the positioning shaft is arranged vertically.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the shockproof device is arranged at the tail end of the heat exchanger tube bundle, so that the heat exchanger tube bundle can be prevented from generating shock when being impacted by cold and hot flows, and the problem that the heat exchanger tube bundle is damaged due to long-term shock, and further the heat exchange efficiency is reduced is solved; the gas-liquid separator is arranged at the tail section of the main body of the heat exchanger, so that the water content in ammonia gas is effectively reduced, and the corrosivity of the ammonia gas is greatly reduced; the catalyst is arranged on the gas-liquid separator part, so that ammonia water is rapidly catalyzed into ammonia gas, and the reaction conversion rate of the equipment is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the vibration preventing device of the present invention.
In the figure: 1. a reactor body; 2. a heat exchanger tube bundle; 3. a steam inlet; 4. a steam outlet; 5. an outlet conduit; 6. a gas-liquid separator; 7. a gas-liquid separation pipe; 8. a collar; 9. positioning the shaft; 10. a straight connecting section; 11. a notch; 12. buckling; 13. a positioning ring; 14. a tension spring; 15. a urea solution inlet; 16. a demineralized water inlet; 17. a manhole; 18. a sewage draining hole; 19. a temperature measuring hole; 20. a catalyst.
Detailed Description
The invention is further described with reference to the following figures and detailed description:
as shown in fig. 1-2, a urea catalytic hydrolysis reactor with a shock-proof device comprises a reactor main body 1, wherein a heat exchanger tube bundle 2 is transversely arranged at the bottom end inside the reactor main body 1, the heat exchanger tube bundle 2 is formed by overlapping a plurality of U-shaped heat exchange tubes, the straight tube end of the heat exchanger tube bundle 2 extends out of the reactor main body 1 and is hermetically connected with the reactor main body 1, a steam inlet 3 is arranged at the upper side of the extending section of the heat exchanger tube bundle 2, a steam outlet 4 is arranged at the lower side of the extending section of the heat exchanger tube bundle 2, the shock-proof device for preventing the heat exchanger tube bundle 2 from vibrating is arranged on the surface of the tail section of the heat exchanger tube bundle 2, an outlet pipeline 5 is arranged at the tail part of the reactor main body 1, a gas-liquid separator 6 is arranged in the outlet pipeline 5, a product outlet is arranged at the top of the outlet pipeline, and a gas-liquid separation tube 7 which is vertically arranged along the outlet pipeline 5 and extends into the lower part of the axis of the reactor main body 1 is arranged at the lower part of the reactor main body 6;
the utility model discloses a reactor, including placing the buckle structure on 2 surfaces of heat exchanger tube bundles in the lantern ring 8 and the card in reactor main part 1 in the shock mounting, 8 inside steps that stretch out to centre of a circle direction that are equipped with of lantern ring, from top to bottom the step terminal surface difference joint has buckle structure, buckle structure includes 2 extending direction's of perpendicular to heat exchanger tube bundles location axle 9, straight linkage segment 10 has been seted up to location axle 9 front portion, and circular connection notch 11 has been seted up on this straight linkage segment 10 surface, the joint has become the buckle 12 that the symmetry set up in the circular connection notch 11, the surface of heat exchanger tube bundles 2 is located to buckle 12 upper end card, and the bottom is rotated and is connected in notch 11, sliding connection is in holding ring 13 behind the outside protrusion in 12 waists of buckle, place in reactor main part 1 in holding ring 13, two buckle 12 bottom is contradicted each other, location axle 9 afterbody is formed by two reducing cylinder end-to-end connection, location axle 9 terminal expanding spring 14, the expanding spring 14 other end of axle with reactor main part 1 inner wall is inconsistent. According to the hydrolysis reactor disclosed by the invention, on the premise of not increasing pressure and temperature, the gas-liquid separator and the coupling catalyst are additionally arranged at the ammonia gas outlet position to improve the conversion rate and conversion efficiency of urea-to-ammonia, so that intermediate products are reduced, energy is saved, and the operating cost is reduced for a great number of users.
According to the invention, a urea solution inlet 15 and a demineralized water inlet 16 are respectively formed in the surface of the side part of the reactor main body 1, the urea solution inlet 15 and the demineralized water inlet 16 are both positioned above the central axis of the reactor main body 1, a manhole 17 is arranged at the top end of the reactor main body 1, a sewage discharge hole 18 is formed in the middle of the side wall of the reactor main body 1, and a temperature measuring hole 19 is formed below the middle of the side wall of the reactor main body 1.
In the invention, the surface of the gas-liquid separator 6 is coupled with a catalyst 20 through a grid, and the catalyst 20 is in a solid spherical shape or a honeycomb briquette shape. By coupling the catalyst to the gas-liquid separator 6, rapid conversion of the urea solution via catalysis is facilitated.
In the invention, the heat exchanger tube bundle 2 is made of stainless steel, and the diameter of the tube bundle is 18-32 mm.
In the invention, the straight connecting section 10 of the positioning shaft 9 is vertically arranged. The straight connecting section 10 of the positioning shaft 9 is vertically arranged, so that the surface of the straight connecting section can be accurately connected with the buckle 12.
When the device works, urea solution enters the hydrolysis reactor main body 1 from the urea solution inlet 15 and reaches 25% of the volume of the reactor main body 1, steam is introduced into the heat exchanger tube bundle 2 through the steam inlet 3 to be heated, the heating temperature is 140-190 ℃, and the pressure is 0.35-0.39 MPa, so that the decomposition of urea is realized; in-process that urea decomposes, heat exchanger tube bundle 2 receives the cold-hot fluid and strikes and easily takes place vibrations, when the tube bank takes place vibrations, to locating buckle 12 at 8 upper and lower both ends of the lantern ring separation of downside that makes progress respectively, 12 tail ends of buckle draw close each other, 12 backs of buckle slide along holding ring 13 is inside, location axle 9 is outwards released, 14 reverse pulling location axles 9 of expanding spring make location axle 9 reset rapidly, 12 reverse recoveries of buckle, thereby guarantee that heat exchanger tube bundle 2 keeps original position unchangeable, avoid it to take place vibrations.
Therefore, the present invention is not limited to the specific embodiments, but rather, the present invention is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a urea catalytic hydrolysis reactor with shock mounting, includes the reactor main part, the inside bottom of reactor main part is horizontal to have heat exchanger tube bank, heat exchanger tube bank overlaps mutually by many U-shaped heat exchange tubes and folds and form, heat exchanger tube bank straight tube end stretches out the reactor main part outside and with reactor main part sealing connection, heat exchanger tube bank stretches out the section upside and is equipped with steam inlet, and the downside is equipped with steam outlet, its characterized in that: the heat exchanger tube bundle tail section surface is provided with a shock-proof device for preventing the heat exchanger tube bundle from vibrating, the tail part of the reactor main body is provided with an outlet pipeline, a gas-liquid separator is arranged in the outlet pipeline, the top part of the outlet pipeline is provided with a product outlet, and the lower part of the gas-liquid separator is provided with a gas-liquid separation tube which is vertically arranged along the outlet pipeline and extends into the reactor main body below the axis;
the utility model discloses a reactor, including the setting up in the reactor main part, the shock mounting is including the buckle structure that heat exchanger tube bank surface was located to lantern ring and card in placing the reactor main part in, the lantern ring is inside to be equipped with the step that stretches out to centre of a circle direction, from top to bottom the step terminal surface difference joint has buckle structure, buckle structure includes perpendicular to heat exchanger tube bank extending direction's location axle, straight linkage segment has been seted up to location axle front portion, and circular connection notch has been seted up on this straight linkage segment surface, the joint has the buckle that the symmetry set up in the circular connection notch, the surface of heat exchanger tube bank is located to buckle upper end card, and the bottom is rotated and is connected in the notch, sliding connection is in the location ring behind the outside protrusion of buckle waist, place in the holding ring in the reactor main part, two the buckle bottom is contradicted each other, location hub end portion is formed by two reducing cylinder end to end-to-end connection, the terminal cover of location axle is equipped with expanding spring, the expanding spring other end with reactor main part inner wall is inconsistent.
2. The reactor of claim 1, wherein the reactor comprises: the reactor main part lateral part surface has been seted up urea solution entry and demineralized water entry respectively, and urea solution entry and demineralized water entry all are in reactor main part central axis top.
3. The reactor of claim 1, wherein the reactor comprises: the top end of the reactor main body is provided with a manhole, the middle part of the side wall of the reactor main body is provided with a sewage draining hole, and a temperature measuring hole is arranged below the middle part of the side wall of the reactor main body.
4. The reactor of claim 1, wherein the reactor comprises: the surface of the gas-liquid separator is coupled with a catalyst through a grid, and the catalyst is in a solid spherical shape or a honeycomb coal shape.
5. The reactor of claim 1, wherein the reactor comprises: the heat exchanger tube bundle is made of stainless steel, and the diameter of the tube bundle is 18-32 mm.
6. The reactor of claim 1, wherein the reactor comprises: the straight connecting section of the positioning shaft is arranged vertically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211257728.3A CN115430391A (en) | 2022-10-13 | 2022-10-13 | Urea catalytic hydrolysis reactor with shock mounting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211257728.3A CN115430391A (en) | 2022-10-13 | 2022-10-13 | Urea catalytic hydrolysis reactor with shock mounting |
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| Publication Number | Publication Date |
|---|---|
| CN115430391A true CN115430391A (en) | 2022-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211257728.3A Pending CN115430391A (en) | 2022-10-13 | 2022-10-13 | Urea catalytic hydrolysis reactor with shock mounting |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203405282U (en) * | 2013-08-05 | 2014-01-22 | Tcl空调器(中山)有限公司 | Thermal bulb fixing device |
| US20150219332A1 (en) * | 2012-08-24 | 2015-08-06 | Mitsubishi Heavy Industries, Ltd. | Heat exchanger tube vibration suppression device and steam generator |
| CN210964003U (en) * | 2019-06-17 | 2020-07-10 | 江苏江杭石化工程有限公司 | Stably-operated aromatic hydrocarbon separation tower bottom reboiler |
| CN211599904U (en) * | 2020-01-17 | 2020-09-29 | 浙江苏商科技有限公司 | Drain pipe antidetonation support easy to assemble |
| CN112678847A (en) * | 2020-12-30 | 2021-04-20 | 上海洁昊环保股份有限公司 | Urea coupling hydrolyzer and urea coupling hydrolysis method thereof |
-
2022
- 2022-10-13 CN CN202211257728.3A patent/CN115430391A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150219332A1 (en) * | 2012-08-24 | 2015-08-06 | Mitsubishi Heavy Industries, Ltd. | Heat exchanger tube vibration suppression device and steam generator |
| CN203405282U (en) * | 2013-08-05 | 2014-01-22 | Tcl空调器(中山)有限公司 | Thermal bulb fixing device |
| CN210964003U (en) * | 2019-06-17 | 2020-07-10 | 江苏江杭石化工程有限公司 | Stably-operated aromatic hydrocarbon separation tower bottom reboiler |
| CN211599904U (en) * | 2020-01-17 | 2020-09-29 | 浙江苏商科技有限公司 | Drain pipe antidetonation support easy to assemble |
| CN112678847A (en) * | 2020-12-30 | 2021-04-20 | 上海洁昊环保股份有限公司 | Urea coupling hydrolyzer and urea coupling hydrolysis method thereof |
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