CN213679852U - Novel urea hydrolysis reactor - Google Patents

Abstract

The utility model discloses a novel urea hydrolysis reactor belongs to flue gas denitration reductant system technical field. The reactor comprises a reactor body, wherein one end of the reactor body is fixedly connected with a closed containing cavity, the other end of the reactor body is fixedly connected with a sealing head, a conveying inner pipe used for conveying urea solution is fixedly connected in the reactor body, the conveying inner pipe extends along the length direction of the reactor body, and the closed containing cavity and the sealing head are communicated with the conveying inner pipe. The reactor comprises a reactor body and is characterized in that a steam inlet and a hydrophobic outlet are respectively formed in the side wall of the reactor body, the steam inlet is located at the position, close to a closed cavity, of the reactor body, the hydrophobic outlet is located at the position, close to an end enclosure, of the reactor body, the closed cavity or the end enclosure is provided with a urea solution inlet, and the closed cavity or the reactor body is provided with an ammonia gas outlet. The utility model has the advantages of high heat transfer efficiency, low equipment cost, stable reaction, strong corrosion resistance, compact equipment and large operation elasticity.

Description

Novel urea hydrolysis reactor

Technical Field

The utility model relates to a novel urea hydrolysis reactor belongs to flue gas denitration reductant system technical field.

Background

In a system for carrying out denitration treatment on flue gas, Selective Catalytic Reduction (SCR) is the most widely applied denitration technology, ammonia is used as a reducing agent in the selective catalytic reduction denitration technology, nitrogen oxides are reduced into nitrogen and water which are harmless to the environment under the action of a catalyst, and the ammonia has high removal efficiency on nitrogen oxide components in the flue gas, particularly nitrogen monoxide. The preparation method of ammonia comprises the steps of preparing ammonia by evaporating liquid ammonia, preparing ammonia by evaporating ammonia water and preparing ammonia by hydrolyzing/pyrolyzing urea, belongs to chemical dangerous goods due to flammability and explosiveness of the liquid ammonia and the ammonia water, and has higher requirements on transportation and storage. In contrast, urea is chemically stable, non-toxic, and easier to transport and store. The urea hydrolysis process is mainly characterized in that urea solution is heated to hydrolyze urea into ammonia and carbon dioxide, and the ammonia obtained by hydrolysis is used for denitration treatment of flue gas.

In the prior art, a steam heating pipe is usually arranged at the bottom in a hydrolysis reactor, a urea solution is introduced into the hydrolysis reactor, high-temperature steam is introduced into the steam heating pipe, and the urea solution is promoted to hydrolyze through heat exchange between the urea solution and the steam heating pipe to prepare ammonia gas. But the device has poor heat exchange effect, low temperature of the ammonia gas at the outlet, easy condensation and high requirement of the reactor on the material.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide a novel urea hydrolysis reactor.

The purpose of the utility model is realized through the following technical scheme: the utility model provides a novel urea hydrolysis reactor, includes the reactor body, the one end fixedly connected with of reactor body seals and holds the chamber, and other end fixedly connected with head, this internal fixedly connected with of reactor is used for carrying and decomposes the transport inner tube of urea solution, carry the inner tube along the length direction extension of reactor body, seal and hold chamber and head and all communicate with carrying the inner tube. The reactor comprises a reactor body and is characterized in that a steam inlet and a hydrophobic outlet are respectively formed in the side wall of the reactor body, the steam inlet is located at the position, close to a closed cavity, of the reactor body, the hydrophobic outlet is located at the position, close to an end enclosure, of the reactor body, the closed cavity or the end enclosure is provided with a urea solution inlet and a catalyst inlet, and the closed cavity or the reactor body is provided with an ammonia gas outlet.

The inner conveying pipe for conveying the urea solution is arranged in the reactor body, so that the urea solution is conveyed along the inner conveying pipe after entering the reactor from the closed containing cavity or the end enclosure, the catalyst enters the reactor from the closed containing cavity or the end enclosure and is dissolved in the urea solution, the hydrolysis of the urea solution is accelerated, the steam enters the reactor from the side wall of the reactor body, namely, the urea solution goes through the pipe pass and the steam goes through the shell pass, so that the part directly contacted with the urea solution is only provided with the inner conveying pipe, the closed containing cavity and the end enclosure, the corrosion-resistant materials required by the preparation reactor are greatly reduced, most of the shell of the reactor is only directly contacted with the steam, and lower-grade materials can be adopted. The urea solution in the conveying inner pipe exchanges heat with the steam outside the conveying inner pipe to promote the hydrolysis reaction of the urea, the ammonia obtained by the reaction moves to the closed containing cavity along the conveying inner pipe and then leaves from an ammonia outlet on the closed containing cavity or the reactor body, and the steam after heat exchange is condensed into water and falls into the bottom of the reactor body to leave from a drainage outlet. The closed container connected with the reactor body can be a seal head or a channel box, so long as a cavity which is relatively closed with the outside and is communicated with the conveying inner pipe is formed and is used as a buffer zone for conveying ammonia gas. When the reactor is of a vertical structure, the ammonia outlet is generally arranged on the closed cavity, and when the reactor is of a horizontal structure, the ammonia outlet can be arranged on the closed cavity or the reactor body. Meanwhile, the steam inlet is arranged at the position, close to the closed cavity, of the reactor body, namely the steam inlet is positioned near the ammonia outlet, so that the temperature of the ammonia at the outlet is favorably improved, the superheat degree of the ammonia is increased, and the condensation of the ammonia in the conveying process is reduced.

Further, the urea solution inlet and the ammonia outlet are both located in the closed containing cavity, the catalyst inlet is located in the end socket, a solution inner tube parallel to the conveying inner tube is fixedly connected in the reactor body, a solution guide tube is fixedly connected in the closed containing cavity, one end of the solution guide tube is fixedly connected with the urea solution inlet, and the other end of the solution guide tube is fixedly connected with the solution inner tube.

The urea solution enters from an inlet of the closed containing cavity, then enters the solution inner tube along the solution guide tube, exchanges heat with steam outside the tube when being conveyed along the solution inner tube to preheat the urea solution, the preheated urea solution flows into the end socket, the catalyst directly enters the end socket from the catalyst inlet to be mixed with the urea solution, the urea solution containing the catalyst enters each conveying inner tube from the end socket upwards, under the heating action of the steam outside the tube on the urea solution, the urea is decomposed to generate ammonia gas and carbon dioxide, the ammonia gas and the carbon dioxide enter the closed containing cavity along the conveying inner tubes upwards, and then the ammonia gas and the carbon dioxide leave from an ammonia gas outlet of the closed containing cavity.

Furthermore, the urea solution inlet, the catalyst inlet and the ammonia outlet are located in a closed containing cavity, a partition plate extending along the length direction of the reactor body is fixedly connected in the closed containing cavity, the urea solution inlet and the ammonia outlet are respectively located on two sides of the partition plate, and the urea solution inlet and the catalyst inlet are located on the same side of the partition plate. The urea solution enters the closed containing cavity from the inlet, is mixed with the catalyst entering from the catalyst inlet, enters the conveying inner tube located on one side of the urea solution inlet, is conveyed downwards along the conveying inner tube, exchanges heat with steam during conveying, realizes preheating of the urea solution, enters the end enclosure from the conveying inner tube, enters the conveying inner tube located on the same side of the ammonia outlet from the end enclosure, exchanges heat with the steam and reacts, and then the ammonia moves upwards to enter the closed containing cavity and leaves from the ammonia outlet of the closed containing cavity.

Further, a guide plate for guiding steam is fixedly connected in the reactor body, the position of the guide plate corresponds to that of the partition plate, one end, facing the closed containing cavity, of the guide plate is fixedly connected with the reactor body, and a gap is reserved between one end, facing the end socket, of the guide plate and the reactor body. Like this steam is after getting into the reactor body, earlier with lie in the transport inner tube with one side with the ammonia export and carry out the heat exchange, then gets into the opposite side of guide plate from the clearance of guide plate below, again with lie in the transport inner tube with one side with the urea solution entry and carry out the heat exchange, realize preheating urea solution.

Furthermore, the reactor body is horizontal, the end socket is internally and fixedly connected with a connecting bent pipe, the extension line of the partition plate is used as a boundary, and two ends of the connecting bent pipe are respectively and fixedly connected with the conveying inner pipes on two sides of the partition plate. After entering the closed cavity, the urea solution is firstly mixed with the catalyst entering from the catalyst inlet, then enters the conveying inner pipe which is positioned at the same side with the urea solution inlet after being mixed, enters the connecting bent pipe of the end socket after being preheated by heat exchange with steam, then enters the corresponding conveying inner pipe which is positioned at the same side with the ammonia outlet along the connecting bent pipe, enters the closed cavity by the ammonia produced by heat exchange with the steam, and is discharged from the ammonia outlet of the closed cavity.

Further, the closed containing cavity is internally and fixedly connected with a guide plate, the guide plate and the ammonia gas outlet are positioned on the same side of the partition plate, the guide plate is positioned between the ammonia gas outlet and the reactor body, the extending direction of the guide plate is perpendicular to the partition plate, one end of the guide plate is fixedly connected with the closed containing cavity, and a gap is reserved between the other end of the guide plate and the partition plate. Through sealing and holding the intracavity and set up the deflector, carry the ammonia that the reaction generated in the inner tube like this and when getting into and sealing and holding the chamber, bump with the deflector, be favorable to increasing the disturbance of air current, reduce the water smoke of thoughtlessly having in the ammonia.

Further, the reactor body is horizontal, urea solution entry and catalyst entry are seted up in the closed appearance chamber, the ammonia outlet is seted up on the reactor body, this internal fixedly connected with of reactor is along the division board of reactor body length direction extension, the division board separates into hydrolysis chamber and ammonia chamber in with the reactor body, the delivery inner tube is located hydrolysis chamber, steam inlet and hydrophobic export are seted up on the reactor body in hydrolysis chamber, the ammonia outlet is seted up on the reactor body in ammonia chamber. The inner cavity of the closed containing cavity is fixedly connected with a partition plate parallel to the partition plate, the partition plate divides the closed containing cavity into a liquid inlet cavity and a gas outlet cavity, the position of the partition plate corresponds to the middle of the hydrolysis cavity, the extension line of the partition plate is used as a boundary, the conveying inner pipe in the hydrolysis cavity is divided into a liquid inlet pipe and a mixing pipe, the liquid inlet cavity is communicated with the liquid inlet pipe, the gas outlet cavity is communicated with the mixing pipe, and the gas outlet cavity is communicated with the ammonia gas cavity. The urea solution enters the liquid inlet cavity of the closed cavity, is mixed with the catalyst entering from the catalyst inlet, continues to enter the liquid inlet pipe in the hydrolysis cavity, enters the end socket after being preheated through heat exchange with steam, enters the mixing pipe through the end socket, is subjected to hydrolysis reaction through heat exchange with the steam, and ammonia generated by the reaction enters the gas outlet cavity along the mixing pipe, enters the ammonia cavity of the reactor body from the gas outlet cavity and finally leaves the reactor from the ammonia outlet.

Furthermore, a connection elbow is fixedly connected in the end socket, and two ends of the connection elbow are respectively and fixedly connected with the liquid inlet pipe and the mixing pipe. The urea solution is conveyed in the reactor body and the end socket along the sequence of the liquid inlet pipe, the connecting bent pipe and the mixing pipe, so that the maintenance and the curing of the reactor are convenient, and the maintenance of the equipment can be realized by replacing one section or a plurality of sections of pipelines.

Furthermore, a safety valve mounting opening is formed in the position, adjacent to the ammonia outlet, of the closed containing cavity or the reactor body, a temperature measuring device, a pressure measuring device and a liquid level measuring device are fixedly connected into the containing cavity, directly communicated with the ammonia outlet, of the closed containing cavity or the reactor body, and the temperature, the pressure and the liquid level conditions near the ammonia outlet are monitored in real time by the temperature measuring device, the pressure measuring device and the liquid level measuring device.

Furthermore, a spoiler is fixedly connected in the conveying inner pipe, so that the retention time of the urea solution in the conveying inner pipe is prolonged, and the urea can be hydrolyzed fully.

The utility model has the advantages that:

1) the conveying inner pipe is arranged in the reactor body, so that the urea solution passes through the pipe pass, the steam passes through the shell pass, the scaling resistance and the heat transfer efficiency of the reactor equipment are improved, the shell pass material and the pressure-resistant grade of the reactor are reduced, and the manufacturing cost of the equipment is reduced. Meanwhile, the urea solution is more stably decomposed, the operation elasticity is larger, the temperature change is smaller when the hydrolysis reactor is under low load, and the steam inlet is arranged at the position close to the ammonia outlet, so that the temperature of the outlet product is favorably improved, and the condensation of ammonia in the conveying process is reduced.

2) By arranging the partition plate or the solution guide pipe, the conveying path of the urea solution is prolonged to be a closed containing cavity, a conveying inner pipe, an end enclosure and a conveying inner pipe, the reality of the urea solution in the conveying inner pipe is prolonged, and the heat exchange between the urea solution and steam is increased.

3) Through setting up the deflector or to the subregion in the reactor body, the air current disturbance or the delivery route when increasing the ammonia output are favorable to reducing the water smoke of mixing in the ammonia.

Drawings

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

Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a third embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a fourth embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a fifth embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a sixth embodiment of the present invention.

In the figure, 1, a reactor body; 2. sealing the cavity; 3. sealing the end; 4. a conveying inner pipe; 41. a liquid inlet pipe; 42. a mixing tube; 5. a steam inlet; 6. a hydrophobic outlet; 7. a urea solution inlet; 8. an ammonia gas outlet; 9. a solution inner tube; 10. a solution conduit; 11. a partition plate; 111. a liquid inlet cavity; 112. an air outlet cavity; 12. a baffle; 13. connecting a bent pipe; 14. a guide plate; 15. a separator plate; 151. a hydrolysis chamber; 152. an ammonia gas cavity; 16. a safety valve mounting port; 17. a temperature measuring device; 18. a pressure measuring device; 19. a liquid level measuring device; 20. a spoiler; 21. a catalyst inlet.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

Example one

As shown in fig. 1, the embodiment provides a novel urea hydrolysis reactor, including vertical reactor body 1, the upper end fixedly connected with of reactor body 1 seals and holds chamber 2, and lower extreme fixedly connected with head 3, and fixedly connected with is used for carrying and decomposing the transport inner tube 4 of urea solution in the reactor body 1, and fixedly connected with spoiler 20 in the transport inner tube 4 carries inner tube 4 to extend along vertical direction, seals and holds chamber 2 and head 3 and all communicates with transport inner tube 4. A steam inlet 5 is formed in the position, close to the closed containing cavity 2, of the side wall of the reactor body 1, a hydrophobic outlet 6 is formed in the position, close to the end enclosure 3, the steam inlet 5 and the hydrophobic outlet 6 are located on two opposite sides of the reactor body 1, a urea solution inlet 7 and a catalyst inlet 21 are formed in the end enclosure 3, and an ammonia outlet 8 is formed in the closed containing cavity 2. The closed cavity 2 is further provided with a safety valve mounting port 16, a temperature measuring device 17, a pressure measuring device 18 and a liquid level measuring device 19 are fixedly connected in the closed cavity 2, the end enclosure 3 is fixedly connected with a supporting piece, and the bottom of the end enclosure 3 is provided with a pollution discharge and drainage port.

The hydrolysis reactor of this embodiment is when operation, urea solution gets into from urea solution entry 7 on the head 3, the catalyst gets into from catalyst entry 21 on the head 3, and mix with urea solution, then move up along carrying inner tube 4, steam then gets into the casing from steam inlet 5 on the reactor body 1, and with the urea solution in carrying inner tube 4 take place heat exchange, the ammonia that urea hydrolysis produced upwards moves to in the closed appearance chamber 2, temperature measuring device 17, pressure measuring device 18 and liquid level measuring device 19 carry out real-time supervision to the condition in the closed appearance chamber 2, the convenient feeding volume and the volume of letting in of steam of in time adjusting urea solution. The steam after heat exchange is condensed into water and falls on the bottom of the reactor body 1, and flows out along the drainage outlet 6.

Example two

As shown in fig. 2, the difference between the present embodiment and the first embodiment is mainly as follows: the urea solution inlet 7 is arranged in the closed containing cavity 2, the catalyst inlet 21 is arranged in the end enclosure 3, the solution guide pipe 10 is fixedly connected in the closed containing cavity 2, the left end of the solution guide pipe 10 is communicated with the urea solution inlet 7, the right end of the solution guide pipe is communicated with the reactor body 1, the solution inner pipe 9 parallel to the conveying inner pipe 4 is fixedly connected in the reactor body 1, the upper end of the solution inner pipe 9 is fixedly connected with the solution guide pipe 10, and the lower end of the solution inner pipe is communicated with the end enclosure 3.

When the hydrolysis reactor of this embodiment is in operation, urea solution gets into from closing urea solution entry 7 on holding chamber 2, then gets into solution inner tube 9 along solution pipe 10, and the steam emergence heat exchange with the reactor body 1 in solution inner tube 9 realizes preheating urea solution, makes urea reaction liquid decompose more steadily. The catalyst enters from a catalyst inlet 21 on the end socket 3, is mixed with the preheated urea solution flowing into the end socket 3, then enters each conveying inner pipe 4 from the end socket 3 upwards, under the heating action of the steam outside the pipes on the urea solution, the urea is decomposed to generate ammonia gas and carbon dioxide, the ammonia gas and the carbon dioxide enter the closed cavity 2 upwards along the conveying inner pipes 4, and then leave from an ammonia gas outlet 8 of the closed cavity 2. The rest is the same as the first embodiment.

EXAMPLE III

As shown in fig. 3, the present embodiment is different from the first embodiment mainly in that: the urea solution inlet 7 and the catalyst inlet 21 are arranged in the closed cavity 2, a partition plate 11 extending in the vertical direction is fixedly connected in the closed cavity 2, the urea solution inlet 7 and the catalyst inlet 21 are located on the left side of the partition plate 11, and the ammonia gas outlet 8 is located on the right side of the partition plate 11. The safety valve mounting port 16, the temperature measuring device 17, the pressure measuring device 18 and the liquid level measuring device 19 are all fixedly connected to the right side of the partition plate 11. A guide plate 12 for guiding steam is fixedly connected in the reactor body 1, the position of the guide plate 12 corresponds to that of the partition plate 11, the correspondence means that the guide plate 12 and the partition plate 11 are positioned in the same plane, and the guide plate 12 is an extension of the partition plate 11 in the reactor body 1. The upper end of the guide plate 12 is fixedly connected with the reactor body 1, and a gap is reserved between the lower end of the guide plate and the reactor body 1.

When the hydrolysis reactor of the embodiment is in operation, urea solution enters from a urea solution inlet 7 on the closed cavity 2, catalyst enters from a catalyst inlet 21 on the closed cavity 2, is mixed with the urea solution, then moves downwards along the conveying inner tube 4 on the left side of the guide plate 12, and performs heat exchange with steam outside the tube during movement, so as to perform preheating, the preheated urea solution enters the end socket 3, then moves upwards along the conveying inner tube 4 on the right side of the guide plate 12, and ammonia gas moves upwards to enter the closed cavity 2 after the heat exchange and reaction with the steam, and leaves from an ammonia gas outlet 8 of the closed cavity 2. Steam then gets into reactor body 1 from steam inlet 5 after, earlier with the heat transfer of conveying inner tube 4 on guide plate 12 right side, then gets into the left side of guide plate 12 from the clearance of guide plate 12 below, preheats the urea solution in the conveying inner tube 4 on the left side again, is favorable to guaranteeing that the ammonia temperature of export is higher. The rest is the same as the first embodiment.

Example four

As shown in fig. 4, this embodiment provides a novel urea hydrolysis reactor, including horizontal reactor body 1, the left end fixedly connected with of reactor body 1 seals and holds chamber 2, and right-hand member fixedly connected with head 3, and fixedly connected with is used for carrying and decomposing the transport inner tube 4 of urea solution in the reactor body 1, and fixedly connected with spoiler 20 in the transport inner tube 4 carries inner tube 4 to extend along the horizontal direction, seals and holds chamber 2 and head 3 and all communicates with transport inner tube 4. Steam inlet 5 has been seted up near the position that seals and hold chamber 2 on the lateral wall of reactor body 1, hydrophobic export 6 has been seted up near the position of head 3, steam inlet 5 and hydrophobic export 6 are located the both sides that reactor body 1 is relative, hold chamber 2 at the seal and seted up urea solution entry 7, catalyst entry 21 and ammonia outlet 8, fixedly connected with follows the baffle 11 that the horizontal direction extends between urea solution entry 7 and the ammonia outlet 8, urea solution entry 7 and catalyst entry 21 are located the below of baffle 11, ammonia outlet 8 is located the top of baffle 11.

As shown in fig. 4, a connection elbow 13 is fixedly connected to the inside of the head 3, and both ends of the connection elbow 13 are fixedly connected to the conveying inner pipes 4 on both sides of the partition 11, respectively, with the extension line of the partition 11 as a boundary. A guide plate 14 extending along the vertical direction is fixedly connected in the closed cavity 2, the guide plate 14 is positioned above the partition plate 11 and is erected between the ammonia gas outlet 8 and the reactor body 1, the upper end of the guide plate 14 is fixedly connected with the closed cavity 2, and a gap is reserved between the lower end of the guide plate and the partition plate 11.

When the device of the embodiment is in operation, after a urea solution enters the closed containing cavity 2 from the urea solution inlet 7, a catalyst enters the closed containing cavity 2 from the catalyst inlet 21, the urea solution is mixed with the catalyst and then conveyed rightwards along the conveying inner tube 4 below the partition plate 11, the urea solution is preheated by steam outside the urea solution, the urea solution enters the connecting bent tube 13 inside the end enclosure 3 rightwards, then enters the conveying inner tube 4 above the partition plate 11 upwards along the connecting bent tube 13 and is conveyed leftwards along the conveying inner tube 4, the steam outside the urea solution provides heat for the urea solution to promote the urea to be hydrolyzed into ammonia, the ammonia enters the closed containing cavity 2 to collide with the guide plate 14, passes through a gap below the guide plate 14, and then is discharged from the ammonia outlet 8. Steam enters the shell of the reactor body 1 from a steam inlet 5 above the reactor body 1, is condensed into water after heat exchange of the conveying inner pipe 4, falls on the bottom of the reactor body 1, and flows out along a drainage outlet 6.

EXAMPLE five

As shown in fig. 5, the present embodiment is different from the fourth embodiment mainly in that: the ammonia outlet 8 is opened on reactor body 1, go back the division board 15 that fixedly connected with extends along the horizontal direction in reactor body 1, division board 15 is for hydrolysising chamber 151 and ammonia chamber 152 in with reactor body 1, chamber 151 is located the division board 15 below hydrolysising, ammonia chamber 152 is located division board 15 top, carry inner tube 4 to be located chamber 151 hydrolysising, steam inlet 5 and hydrophobic export 6 are opened on reactor body 1 of chamber 151 hydrolysising, ammonia outlet 8 is opened on reactor body 1 of ammonia chamber 152. The partition plate 11 in the closed cavity 2 divides the closed cavity 2 into a liquid inlet cavity 111 and a liquid outlet cavity 112, the liquid inlet cavity 111 is located below the partition plate 11, the liquid outlet cavity 112 is located above the partition plate 11, the guide plate 14 is not arranged in the liquid outlet cavity 112, and the connecting bent pipe 13 is not arranged in the seal head 3. The inner conveying pipe 4 communicated with the liquid inlet cavity 111 in the hydrolysis cavity 151 is a liquid inlet pipe 41, the inner conveying pipe 4 communicated with the gas outlet cavity 112 is a mixing pipe 42, and the gas outlet cavity 112 is also communicated with an ammonia gas cavity 152.

When the device of this embodiment is in operation, after urea solution enters the closed cavity 2 from the urea solution inlet 7, the catalyst enters the closed cavity 2 from the catalyst inlet 21, the urea solution is mixed with the catalyst and then is conveyed to the right along the liquid inlet pipe 41, the urea solution is preheated by steam outside the pipe, the urea solution enters the end enclosure 3 to the right and then is conveyed to the left along the mixing pipe 42, ammonia generated in the conveying process enters the gas outlet cavity 112 and then enters the ammonia cavity 152 along the gas outlet cavity 112, and leaves from the ammonia outlet 8 on the ammonia cavity 152, and the rest is the same as the fourth embodiment.

EXAMPLE six

As shown in fig. 6, the present embodiment is different from the fifth embodiment mainly in that: the connection elbow 13 is fixedly connected in the end socket 3, and two ends of the connection elbow 13 are respectively and fixedly connected with the liquid inlet pipe 41 and the mixing pipe 42.

When the equipment of this embodiment is in operation, the urea solution enters the closed cavity 2 from the urea solution inlet 7 and is transported along the liquid inlet pipe 41-the connecting elbow 13-the mixing pipe 42, and the rest is the same as the fifth embodiment.

The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims (10)

1. A novel urea hydrolysis reactor is characterized in that: the urea solution decomposition device comprises a reactor body (1), wherein one end of the reactor body (1) is fixedly connected with a closed containing cavity (2), the other end of the reactor body is fixedly connected with an end enclosure (3), a conveying inner pipe (4) used for conveying and decomposing urea solution is fixedly connected in the reactor body (1), the conveying inner pipe (4) extends along the length direction of the reactor body (1), and the closed containing cavity (2) and the end enclosure (3) are both communicated with the conveying inner pipe (4); the reactor is characterized in that a steam inlet (5) and a hydrophobic outlet (6) are respectively formed in the side wall of the reactor body (1), the steam inlet (5) is located at the position, close to the closed cavity (2), of the reactor body (1), the hydrophobic outlet (6) is located at the position, close to the end enclosure (3), of the reactor body (1), a urea solution inlet (7) and a catalyst inlet (21) are formed in the closed cavity (2) or the end enclosure (3), and an ammonia outlet (8) is formed in the closed cavity (2) or the reactor body (1).

2. A novel urea hydrolysis reactor as claimed in claim 1, wherein: urea solution entry (7) and ammonia outlet (8) all are located and seal and hold chamber (2), catalyst entry (21) are located head (3), fixedly connected with and carry solution inner tube (9) that inner tube (4) are parallel in reactor body (1), fixedly connected with solution pipe (10) in the closed chamber (2) of holding, the one end and the urea solution entry (7) fixed connection of solution pipe (10), the other end and solution inner tube (9) fixed connection.

3. A novel urea hydrolysis reactor as claimed in claim 1, wherein: urea solution entry (7), catalyst entry (21) and ammonia outlet (8) all are located and seal and hold chamber (2), seal and hold chamber (2) interior fixedly connected with along baffle (11) that reactor body (1) length direction extended, urea solution entry (7) and ammonia outlet (8) are located the both sides of baffle (11) respectively, urea solution entry (7) and catalyst entry (21) are located the same one side of baffle (11).

4. A novel urea hydrolysis reactor as claimed in claim 3, wherein: fixedly connected with is used for carrying out guide plate (12) of water conservancy diversion to steam in reactor body (1), the position of guide plate (12) is corresponding with baffle (11), guide plate (12) are towards sealing the one end and reactor body (1) fixed connection that hold chamber (2), leave the clearance between one end of guide plate (12) orientation head (3) and reactor body (1).

5. A novel urea hydrolysis reactor as claimed in claim 3, wherein: the reactor body (1) is horizontal, the end socket (3) is internally and fixedly connected with the connecting bent pipe (13), the extension line of the partition board (11) is used as a limit, and two ends of the connecting bent pipe (13) are respectively and fixedly connected with the conveying inner pipes (4) on two sides of the partition board (11).

6. A novel urea hydrolysis reactor as claimed in claim 5, wherein: fixedly connected with deflector (14) in the closed chamber (2), deflector (14) and ammonia outlet (8) are located the same one side of baffle (11), deflector (14) are located between ammonia outlet (8) and reactor body (1), the extending direction of deflector (14) is perpendicular with baffle (11), the one end and the closed chamber (2) fixed connection of deflector (14), leave the clearance between the other end and baffle (11).

7. A novel urea hydrolysis reactor as claimed in claim 1, wherein: the reactor body (1) is horizontal, the urea solution inlet (7) and the catalyst inlet (21) are arranged in the closed containing cavity (2), the ammonia gas outlet (8) is arranged on the reactor body (1), a partition plate (15) extending along the length direction of the reactor body (1) is fixedly connected in the reactor body (1), the interior of the reactor body (1) is divided into a hydrolysis cavity (151) and an ammonia gas cavity (152) by the partition plate (15), the conveying inner tube (4) is positioned in the hydrolysis cavity (151), the steam inlet (5) and the hydrophobic outlet (6) are arranged on the reactor body (1) of the hydrolysis cavity (151), and the ammonia gas outlet (8) is arranged on the reactor body (1) of the ammonia gas cavity (152); seal baffle (11) that holds chamber (2) internal fixation connected with and division board (15) parallel, baffle (11) will seal and be divided into feed liquor chamber (111) and play gas chamber (112) in holding chamber (2), the position of baffle (11) corresponds with the middle part in chamber (151) of hydrolysising, with the extension line of baffle (11) is the boundary, divide into feed liquor pipe (41) and mixing tube (42) with transport inner tube (4) in the chamber (151) of hydrolysising, feed liquor chamber (111) and feed liquor pipe (41) intercommunication, go out gas chamber (112) and mixing tube (42) intercommunication, go out gas chamber (112) and ammonia gas chamber (152) intercommunication.

8. A novel urea hydrolysis reactor as claimed in claim 7, wherein: the seal head (3) is internally and fixedly connected with a connecting bent pipe (13), and two ends of the connecting bent pipe (13) are respectively and fixedly connected with the liquid inlet pipe (41) and the mixing pipe (42).

9. A novel urea hydrolysis reactor as claimed in any one of claims 1 to 8, characterised in that: a safety valve mounting opening (16) is formed in the position, adjacent to the ammonia gas outlet (8), of the closed containing cavity (2) or the reactor body (1), and a temperature measuring device (17), a pressure measuring device (18) and a liquid level measuring device (19) are fixedly connected into the containing cavity, directly communicated with the ammonia gas outlet (8), of the closed containing cavity (2) or the reactor body (1).

10. A novel urea hydrolysis reactor as claimed in any one of claims 1 to 8, characterised in that: a spoiler (20) is fixedly connected in the conveying inner pipe (4).

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