Tail gas treatment mechanism of ammonium molybdate crystallizer

Abstract

The utility model discloses an ammonium molybdate crystallizer tail gas treatment mechanism which comprises a crystallization kettle, the top end of the crystallization kettle is connected with a tail gas discharge pipe, one side of the tail gas discharge pipe is connected with a heat exchanger, the heat exchanger is connected with the tail gas discharge pipe through a thread structure, and the heat exchanger comprises a heat exchange main sleeve; the utility model relates to the technical field of ammonium molybdate tail gas treatment, in particular to a tail gas treatment mechanism of an ammonium molybdate crystallizer, which adopts a heat exchange sleeve arranged in a heat exchange main sleeve to perform heat exchange between a heat exchange medium and tail gas, and improves the heat exchange efficiency by increasing the heat exchange area, and meanwhile, the heat exchange sleeve adopts a linear structure, so that the heat exchange efficiency is improved. Furthermore, threaded structures are arranged at the two ends of the heat exchange sleeve and are in threaded connection with a pair of sealing limiting heads, one sealing limiting head is movably connected, the other sealing limiting head is fixedly connected, the heat exchange sleeve can be detached from one side, and maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of ammonium molybdate tail gas treatment, in particular to an ammonium molybdate crystallizer tail gas treatment mechanism. Background Art

[0002] In the modern production process of ammonium molybdate, due to the need for distillation and crystallization, a crystallizer is often used to evaporate and crystallize ammonium molybdate. The tail gas generated during the evaporation and crystallization not only contains a large amount of heat, but also includes some accompanying products, so it needs to be recovered and processed.

[0003] At present, the tail gas of ammonium molybdate crystallizer is mainly utilized by recovering heat through heat exchanger. However, the contact between the heat exchanger and the tail gas of ammonium molybdate crystallization mostly adopts tubular structure heat exchanger. On the one hand, the contact with the tail gas of crystallization is not sufficient, and the heat exchange is not thorough enough, resulting in that the water after the heat exchange of the tail gas of crystallization still contains a little heat, causing heat waste. On the other hand, due to the U-shaped tube row structure of the heat exchanger, it is impossible to quickly disassemble and assemble a circulating tube row when dismantling and replacing, which makes maintenance very inconvenient. In view of this, in-depth research was conducted on the above problems, and this case was generated. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides an ammonium molybdate crystallizer tail gas treatment mechanism, which solves the existing background technology problems.

[0005] To achieve the above purpose, the utility model is implemented by the following technical scheme: an ammonium molybdate crystallizer tail gas treatment mechanism, comprising a crystallization kettle, the top of the crystallization kettle is connected to a tail gas exhaust pipe, one side of the tail gas exhaust pipe is connected to a heat exchanger, the heat exchanger and the tail gas exhaust pipe are connected by a threaded structure, and the heat exchanger includes a heat exchange main sleeve;

[0006] The heat exchanger further includes a pair of plugging ends, the two ends of the heat exchange main sleeve are connected with a pair of plugging ends, the pair of plugging ends are respectively connected with a heat exchange inlet and a heat exchange outlet, an intake pipe is arranged on the heat exchange main sleeve to be connected with an exhaust pipe, and an exhaust pipe is correspondingly arranged on the other side of the heat exchange main sleeve, and the exhaust pipe and the intake pipe are respectively arranged at the bottom and the top of the heat exchange main sleeve;

[0007] A pair of closed end plates are connected at both ends of the heat exchange main sleeve, and a pair of closed end plates are provided with a plurality of pairs of sockets in a concentric annular array, a heat exchange sleeve is inserted between the opposite pairs of sockets, and a pair of sealing limit heads are provided at both ends of the heat exchange sleeve;

[0008] The sealing limit head is sealed on the outside of the socket, the sealing limit head on one side is fixed on the socket of the closed end plate, and the sealing limit head on the other side is threadedly connected to the heat exchange sleeve.

[0009] Preferably, the sealing end is connected to the heat exchange main sleeve via a pair of flange plates of annular structure, and the pair of flange plates are connected via a plurality of pairs of tension bolts.

[0010] Preferably, a switch valve is provided on the exhaust pipe, and the air intake pipe is connected to the exhaust pipe via a flange.

[0011] Preferably, the heat exchange sleeve is a cylindrical through tube, a plurality of enhanced heat exchange grooves are evenly opened along the axial direction on the heat exchange sleeve, and a plurality of enhanced heat exchange plates are correspondingly arranged along the axial direction inside the heat exchange sleeve.

[0012] Preferably, the sealing limit head is a polygonal plate with an internal thread structure, and a sealing gasket with an annular structure is provided on one side corresponding to the socket, and the sealing gasket is wrapped around the outside of the heat exchange sleeve and matches the outer ring of the socket.

[0013] Preferably, a plurality of insertion holes are arranged outside the sealing limit head located on the side fixed to the closed end plate, and screws are arranged through the insertion holes to be fixed to the closed end plate. Beneficial Effects

[0014] The utility model provides an ammonium molybdate crystallizer tail gas treatment mechanism. It has the following beneficial effects: the ammonium molybdate crystallizer tail gas treatment mechanism adopts a heat exchange sleeve arranged in a heat exchange main sleeve to perform heat exchange between a heat exchange medium and tail gas, and while increasing the heat exchange area to improve the heat exchange efficiency, the heat exchange sleeve adopts a straight structure, and then a threaded structure is arranged at both ends of the heat exchange sleeve to be threadedly connected with a pair of sealing limit heads, one of the pair of sealing limit heads adopts a movable connection, and the other adopts a fixed connection, and the heat exchange sleeve can be disassembled from one side for easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of an ammonium molybdate crystallizer tail gas treatment mechanism described in the utility model.

[0016] Figure 2 The utility model is a schematic cross-sectional structure diagram of an ammonium molybdate crystallizer tail gas treatment mechanism.

[0017] Figure 3 The utility model is a schematic diagram of the explosion structure of the tail gas treatment mechanism of the ammonium molybdate crystallizer.

[0018] Figure 4 It is a partially enlarged structural schematic diagram of an ammonium molybdate crystallizer tail gas treatment mechanism described in the utility model.

[0019] In the figure: 1. exhaust pipe; 2. main heat exchange sleeve; 3. sealing end; 4. heat exchange inlet; 5. heat exchange outlet; 6. air inlet pipe; 7. exhaust pipe; 8. closed end plate; 9. socket; 10. heat exchange sleeve; 11. sealing limit head; 12. flange plate; 13. switch valve; 101. reinforced heat exchange tank; 102. reinforced heat exchange plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 The utility model provides an implementation scheme: in the tail gas treatment of modern ammonium molybdate crystallizer, the tail gas of the crystallizer is often heat exchanged. However, the existing heat exchange device often adopts a tube row structure heat exchanger when performing heat exchange treatment on the tail gas. However, in order to increase the heat exchange area, the tube row often adopts a U-shaped structure. However, the heat exchange tube row of this structure is not easy to disassemble and assemble during disassembly and maintenance, and the operation workload is very large.

[0022] In view of the above problems, the present application discloses an ammonium molybdate crystallizer tail gas treatment mechanism, wherein the tail gas exhaust pipe 1 is installed through a crystallization kettle, and after the ammonium molybdate solution enters the crystallization kettle, the tail gas generated by the ammonium molybdate crystallization is discharged outward from the tail gas exhaust pipe 1 by heating the crystallization kettle, and then a heat exchanger is connected to one side of the tail gas exhaust pipe 1, and the tail gas is heat exchanged by the heat exchanger. The tail gas after heat exchange is condensed into liquid, and the liquid can continue to recover heat. The main body of the heat exchanger is a heat exchange main sleeve 2, which is connected to the tail gas exhaust pipe 1, and the tail gas enters the heat exchange main sleeve 2 through the tail gas exhaust pipe 1;

[0023] According to the instruction manual Figure 1-4 It can be seen that the heat exchanger further includes a pair of plugging ends 3, which are used to seal the two ends of the heat exchange main sleeve 2 and also serve as a space for water inlet and water outlet exchange. The pair of plugging ends 3 are respectively connected with a heat exchange inlet 4 and a heat exchange outlet 5. The heat exchange medium enters the plugging end head 3 on one side through the heat exchange inlet 4. The two ends of the heat exchange main sleeve 2 are sealed through the closed end plate 8. The closed end plates 8 at both ends of the heat exchange main sleeve 2 are connected through the heat exchange sleeve 10. After the heat exchange medium passes between the heat exchange sleeve 10 into the other plugging end head 3, it flows out through the heat exchange outlet 5.

[0024] Specifically, the heat exchange main sleeve 2 is realized by the following structure: a pair of closed end plates 8 are connected to both ends of the heat exchange main sleeve 2, and a pair of closed end plates 8 are provided with a plurality of pairs of sockets 9 in a concentric annular array, and a heat exchange sleeve 10 is inserted between the opposite pair of sockets 9. The closed end plates 8 are welded or sealed to the inner wall of the heat exchange main sleeve 2, and the plurality of sockets 9 can not only allow the heat exchange sleeve 10 to pass through, but also limit and fix the heat exchange sleeve 10;

[0025] Furthermore, in order to facilitate maintenance and disassemble and assemble the heat exchange sleeve 10 more quickly, a pair of sealing limit heads 11 are provided at both ends of the heat exchange sleeve 10. The sealing limit heads 11 are sealed on the outside of the socket 9. The sealing limit head 11 on one side is fixed on the socket 9 of the closed end plate 8, and the sealing limit head 11 on the other side is threadedly connected with the heat exchange sleeve. When used, the heat exchange sleeve 10 is inserted from one side of the movable sealing limit head 11. When the heat exchange sleeve 10 is inserted into the fixed sealing limit head 11, the heat exchange sleeve 10 is rotated so that the threaded structure of the heat exchange sleeve 10 is threadedly connected with the fixed sealing limit head 11, and one end of the heat exchange sleeve 10 is sealed and connected, and then the movable sealing limit head 11 is threadedly connected to the heat exchange sleeve 10 so that the sealing limit head 11 blocks the other end of the heat exchange sleeve 10.

[0026] As a preferred solution, further, the sealing end head 3 is connected to the heat exchange main sleeve 2 through a pair of annular flange plates 12, and the pair of flange plates 12 are connected by a plurality of pairs of tension bolts. The heat exchange main sleeve 2 and the sealing end head 3 can be separated through the connection of the tension bolts.

[0027] As a preferred solution, further, a switch valve 13 is provided on the discharge pipe 7, and the intake pipe 6 is connected to the exhaust pipe 1 through a flange. The discharge pipe 7 can be switched on and off by the switch valve 13 to discharge the condensed liquid, and the flange of the intake pipe 6 can be separated from the flange of the exhaust pipe 1, so as to facilitate the disassembly and maintenance of the heat exchanger.

[0028] As a preferred solution, further, the heat exchange sleeve 10 is a cylindrical through tube, and a plurality of reinforced heat exchange grooves 101 are evenly opened along the axial direction on the heat exchange sleeve 10, and a plurality of reinforced heat exchange plates 102 are arranged along the axial direction in the corresponding heat exchange sleeve 10, and the contact area between the heat exchange sleeve 10 and the heat exchange medium and the inner cavity of the heat exchange main sleeve 2 is increased by the inner reinforced heat exchange plates 102 and the outer reinforced heat exchange grooves 101.

[0029] As a preferred solution, further, the sealing limit head 11 is a polygonal plate with an internal thread structure, and a sealing gasket with an annular structure is arranged on one side of the corresponding socket 9. The sealing gasket is wrapped around the outside of the heat exchange sleeve 10 and matches the outer ring of the socket 9. The sealing gasket improves the sealing between the heat exchange sleeve 10 and the sealing limit head 11.

[0030] As a preferred solution, further, a plurality of insertion holes are arranged outside the sealing limit head 11 on the side fixed to the closed end plate 8, screws are passed through the insertion holes to fix to the closed end plate 8, and the sealing limit head 11 on the fixed side can be removed from the socket 9 by screws.

[0031] From the above, it can be generally known that the tail gas treatment mechanism of the ammonium molybdate crystallizer adopts the heat exchange sleeve 10 arranged in the heat exchange main sleeve 2 to exchange heat between the heat exchange medium and the tail gas. By increasing the heat exchange area, the heat exchange efficiency is improved. The heat exchange sleeve 10 adopts a straight structure, and then a threaded structure is provided at both ends of the heat exchange sleeve 10 to be threadedly connected with a pair of sealing limit heads 11. One of the pair of sealing limit heads 11 adopts a movable connection and the other adopts a fixed connection. The heat exchange sleeve 10 can be disassembled from one side for easy maintenance.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ammonium molybdate crystallizer tail gas treatment mechanism, comprising a crystallization kettle, the top of the crystallization kettle is connected to a tail gas exhaust pipe (1), one side of the tail gas exhaust pipe (1) is connected to a heat exchanger, the heat exchanger and the tail gas exhaust pipe (1) are connected via a threaded structure, characterized in that: The heat exchanger comprises a heat exchange main sleeve (2); The heat exchanger further comprises a pair of plugging ends (3), the two ends of the heat exchange main sleeve (2) are connected to a pair of plugging ends (3), the pair of plugging ends (3) are respectively connected to a heat exchange inlet (4) and a heat exchange outlet (5), an air intake pipe (6) is arranged on the heat exchange main sleeve (2) and is connected to the exhaust pipe (1), and an exhaust pipe (7) is correspondingly arranged on the other side of the heat exchange main sleeve (2), and the exhaust pipe (7) and the air intake pipe (6) are respectively arranged at the bottom end and the top end of the heat exchange main sleeve (2); A pair of closed end plates (8) are connected to both ends of the heat exchange main sleeve (2); a plurality of pairs of sockets (9) are provided on the pair of closed end plates (8) in a concentric annular array; a heat exchange sleeve (10) is inserted between the opposite pairs of sockets (9); and a pair of sealing limit heads (11) are provided at both ends of the heat exchange sleeve (10); The sealing limit head (11) is sealed on the outside of the socket (9), the sealing limit head (11) on one side is fixed on the socket (9) of the closed end plate (8), and the sealing limit head (11) on the other side is threadedly connected to the heat exchange sleeve.

2. The tail gas treatment mechanism of an ammonium molybdate crystallizer according to claim 1, characterized in that: The plugging end (3) is connected to the heat exchange main sleeve (2) via a pair of annular flange plates (12), and the pair of flange plates (12) are connected via a plurality of pairs of tension bolts.

3. The tail gas treatment mechanism of an ammonium molybdate crystallizer according to claim 2, characterized in that: The exhaust pipe (7) is provided with a switch valve (13), and the air intake pipe (6) is connected to the exhaust pipe (1) via a flange.

4. The tail gas treatment mechanism of an ammonium molybdate crystallizer according to claim 3, characterized in that: The heat exchange sleeve (10) is a cylindrical through pipe, and a plurality of enhanced heat exchange grooves (101) are evenly arranged along the axial direction on the heat exchange sleeve (10), and a plurality of enhanced heat exchange plates (102) are correspondingly arranged along the axial direction inside the heat exchange sleeve (10).

5. The tail gas treatment mechanism of an ammonium molybdate crystallizer according to claim 4, characterized in that: The sealing limit head (11) is a polygonal plate with an internal thread structure, and a sealing gasket with an annular structure is provided on one side corresponding to the socket (9), and the sealing gasket is wrapped around the outside of the heat exchange sleeve (10) and matches the outer ring of the socket (9).

6. The tail gas treatment mechanism of an ammonium molybdate crystallizer according to claim 5, characterized in that: A plurality of insertion holes are arranged outside the sealing limit head (11) located on the side fixed to the closed end plate (8), and screws are arranged through the insertion holes to fix to the closed end plate (8).

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