Waste heat recovery type hydrolysis reaction device

Abstract

The utility model discloses a waste heat recovery type hydrolysis reaction device which comprises a tank body, the upper end of the tank body is fixedly connected with a feeding box, one end of the upper portion of the feeding box is provided with a feeding port, the feeding port is internally provided with a circulation chamber in a penetrating mode, a preheating cavity is formed in the feeding box, the circulation chamber is arranged in the preheating cavity, and the preheating cavity is communicated with the circulation chamber. The upper end of the tank body is fixedly connected with a driving motor, the upper end of the inner side of the tank body is fixedly connected with a connecting shell, and the output end of the driving motor penetrates through the connecting shell and is inwards provided with a second rotating rod; by arranging a driving motor, a first belt pulley, a second belt pulley, a first rotating rod and a second rotating rod, two pairs of stirring assemblies in the tank body can rotate, so that a urea solution entering the tank body can be stirred and mixed, and heating hydrolysis operation on the urea solution can be realized by matching with a heating sleeve on the outer side; the hydrolysis reaction efficiency of the whole device is improved.

Description

Technical Field

[0001] The utility model relates to the field of hydrolysis reaction, in particular to a waste heat recovery type hydrolysis reaction device. Background Art

[0002] The main flue gas denitration technologies in thermal power plants include low-nitrogen combustion, selective non-catalytic reduction (SNCR) and selective catalytic reduction (SCR). Due to the complex coal quality and high NOx content in flue gas, the SCR technology with high denitration efficiency has been greatly promoted in China.

[0003] At present, the urea hydrolysis reactor adopted in the power plant flue gas denitration system generally uses the method of indirectly heating urea solution with U-shaped coil steam. The urea solution is heated and decomposed to produce ammonia and carbon dioxide, and finally discharged from the upper part of the reactor into the SCR denitration system. In the actual operation of the current hydrolyzer, the poor urea solution that has completed the reaction in the hydrolyzer is directly discharged. Since the poor urea solution discharged is at a relatively high temperature due to being heated during the reaction, the existing urea hydrolyzer has a large energy loss, and the waste heat of the poor urea solution is not recovered and utilized. At the same time, when hydrolyzing the urea solution, it is usually directly heated, and no corresponding auxiliary heating component is set, resulting in a greatly reduced reaction efficiency of the entire hydrolysis reaction device. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a waste heat recovery type hydrolysis reaction device, which solves the problem that in the prior art, when hydrolyzing urea solution, it is usually directly heated, and no corresponding auxiliary heating component is set, resulting in a greatly reduced reaction rate of the entire hydrolysis reaction device.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme. A waste heat recovery type hydrolysis reaction device includes a tank body. The upper end of the tank body is fixedly connected with a feed box. One end above the feed box is provided with a feed inlet, and the feed inlet is provided with a flow chamber through the inside. A preheating chamber is arranged inside the feed box, and the flow chamber is arranged inside the preheating chamber.

[0006] The upper end of the tank body is fixedly connected with a driving motor. The inner upper end of the tank body is fixedly connected with a connecting shell. The output end of the driving motor penetrates through the connecting shell and is provided with a second rotating rod inside. A first belt pulley is fixedly connected to the second rotating rod. A first rotating rod is rotatably connected inside the connecting shell. A second belt pulley is fixedly connected to the first rotating rod. A belt is arranged on the first belt pulley and the second belt pulley. A drain pipe penetrates through the bottom of the tank body. A solenoid valve is arranged inside the drain pipe. The other end of the drain pipe is provided with a delivery pipe. A delivery pump is arranged in the middle of the delivery pipe. The other end of the delivery pipe penetrates through the feed box and is arranged around the outside of the preheating chamber.

[0007] As a further description of the above technical solution: A number of stirring rods are fixedly connected to the first rotating rod and the second rotating rod.

[0008] As a further description of the above technical solution: A heating jacket is arranged on the outer side of the tank body. Both ends of the outer side of the tank body are fixedly connected with support frames, and the bottom of the support frame is fixedly connected with a base.

[0009] The utility model has the following beneficial effects:

[0010] 1. Compared with the prior art, the waste heat recovery type hydrolysis reaction device can rotate two pairs of stirring components inside by arranging a driving motor, a first belt pulley, a second belt pulley, a first rotating rod and a second rotating rod, so as to stir and mix the urea solution entering the tank body. And with the cooperation of the outer heating jacket, the heating hydrolysis operation of the urea solution can be realized, improving the hydrolysis reaction efficiency of the whole device;

[0011] 2. Compared with the prior art, the waste heat recovery type hydrolysis reaction device can send the hydrolyzed urea solution into the conveying pipe by arranging a conveying pipe and a conveying pump, and the conveying pipe surrounds the outer side of the preheating cavity, so as to preheat the urea solution inside the flow chamber, thereby improving the waste heat recovery and utilization effect.

[0012] The additional aspects and advantages of the utility model will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the utility model. Description of the Drawings

[0013] The following further illustrates the utility model in conjunction with the drawings and embodiments;

[0014] Figure 1 is the overall structural schematic diagram of the utility model.

[0015] Figure 2 is the internal structural schematic diagram of the feed box of the utility model.

[0016] Figure 3 is the internal structural schematic diagram of the connection shell of the utility model.

[0017] Legend Explanation:

[0018] 1. Tank body; 2. Stirring rod; 3. Support frame; 4. Base; 5. Drain pipe; 6. Conveying pipe; 7. Conveying pump; 8. First rotating rod; 9. Connection shell; 10. Heating jacket; 11. Flow chamber; 12. Feed box; 13. Feed inlet; 14. Preheating cavity; 15. Driving motor; 16. Second rotating rod; 17. First belt pulley; 18. Belt; 19. Second belt pulley; 20. Solenoid valve. Detailed Embodiments

[0019] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The function of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model. However, it should not be construed as a limitation on the protection scope of the present utility model.

[0020] Referring to Figures 1-3 , an embodiment provided by the present utility model, a waste heat recovery type hydrolysis reaction device, includes a tank body 1. A feed box 12 is fixedly connected to the upper end of the tank body 1. A feed inlet 13 is opened at one end above the feed box 12. The feed inlet 13 is provided with a flow chamber 11 penetrating inward. A preheating chamber 14 is arranged inside the feed box 12, and the flow chamber 11 is arranged inside the preheating chamber 14. By setting the feed inlet 13, the urea solution can be sent into the flow chamber 11, and by setting the flow chamber 11, the flow time of the urea solution inside the feed assembly can be prolonged, so as to cooperate with the preheating assembly for preheating;

[0021] A driving motor 15 is fixedly connected to the upper end of the tank body 1. A connecting shell 9 is fixedly connected to the inner upper end of the tank body 1. The output end of the driving motor 15 penetrates the connecting shell 9 and is provided with a second rotating rod 16 inward. A first belt pulley 17 is fixedly connected to the second rotating rod 16. A first rotating rod 8 is rotatably connected inside the connecting shell 9. A second belt pulley 19 is fixedly connected to the first rotating rod 8. A belt 18 is arranged on the first belt pulley 17 and the second belt pulley 19. A plurality of stirring rods 2 are fixedly connected to the first rotating rod 8 and the second rotating rod 16. During the hydrolysis process, the upper driving motor 15 can be started to drive the second rotating rod 16 and the first belt pulley 17 to rotate. Under the action of the belt 18, the first rotating rod 8 and the second belt pulley 19 can be driven to rotate, so as to realize the rotation operation of the two pairs of stirring components, stir the internal urea solution, and improve the hydrolysis efficiency;

[0022] A heating jacket 10 is arranged on the outer side of the tank body 1. Two support frames 3 are fixedly connected to both ends of the outer side of the tank body 1. A base 4 is fixedly connected to the bottom of the support frame 3. By setting the heating jacket 10, the internal urea solution can be heated and hydrolyzed, and the device can be stably supported under the action of the support frame 3 and the base 4;

[0023] A drain pipe 5 is provided through the bottom of the tank body 1, and a solenoid valve 20 is arranged inside the drain pipe 5. By starting the solenoid valve 20, the hydrolyzed urea solution in the drain pipe 5 can be discharged. The other end of the drain pipe 5 is provided with a delivery pipe 6. A delivery pump 7 is arranged in the middle of the delivery pipe 6. The other end of the delivery pipe 6 penetrates through the feed tank 12 and is arranged around the outside of the preheating chamber 14. Starting the delivery pump 7 can send the hydrolyzed urea solution into the delivery pipe 6. The delivery pipe 6 is arranged around the outside of the preheating chamber 14, so that the urea solution inside the circulation chamber 11 can be preheated, thereby improving the effect of its waste heat recovery and utilization.

[0024] Working principle: When the device is in use, first, the urea solution to be hydrolyzed is sent into the inside of the circulation chamber 11 through the feed port 13. After passing through the circulation chamber 11, the urea solution can be sent into the inside of the tank body 1. At this time, starting the heating jacket 21 on the outside can heat and hydrolyze the urea solution inside. During the hydrolysis process, the driving motor 15 above can be started to drive the second rotating rod 16 and the first pulley 17 to rotate. Under the action of the belt 18, the first rotating rod 8 and the second pulley 19 can be driven to rotate, so as to realize the rotation operation of the two pairs of stirring components, stir the urea solution inside, improve the hydrolysis efficiency, and after the hydrolysis is completed, opening the solenoid valve 20 can discharge the hydrolyzed urea solution. Starting the delivery pump 7 can send the hydrolyzed urea solution into the delivery pipe 6. The delivery pipe 6 is arranged around the outside of the preheating chamber 14, so that the urea solution inside the circulation chamber 11 can be preheated, thereby improving the effect of its waste heat recovery and utilization.

[0025] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the said technical field, various changes can be made without departing from the gist of the present invention.

Claims

1. A waste heat recovery hydrolysis reaction device, comprising a tank body (1), characterized in that: The upper end of the tank body (1) is fixedly connected to a feed box (12), an upper end of the feed box (12) is provided with a feed port (13), a flow chamber (11) is provided inwardly through the feed port (13), a preheating chamber (14) is provided inside the feed box (12), and the flow chamber (11) is provided inside the preheating chamber (14); The upper end of the tank body (1) is fixedly connected to a driving motor (15), the inner upper end of the tank body (1) is fixedly connected to a connecting shell (9), the output end of the driving motor (15) passes through the connecting shell (9) and is provided with a second rotating rod (16) inwardly, the second rotating rod (16) is fixedly connected to a first belt pulley (17), the interior of the connecting shell (9) is rotatably connected to a first rotating rod (8), the first rotating rod (8) is fixedly connected to a second belt pulley (19), a belt (18) is provided on the first belt pulley (17) and the second belt pulley (19), a drain pipe (5) is provided through the bottom of the tank body (1), an electromagnetic valve (20) is provided inside the drain pipe (5), a delivery pipe (6) is provided at the other end of the drain pipe (5), a delivery pump (7) is provided in the middle of the delivery pipe (6), and the other end of the delivery pipe (6) passes through the feed box (12) and is arranged around the outer side of the preheating chamber (14).

2. A waste heat recovery hydrolysis reaction device according to claim 1, characterized in that: A plurality of stirring rods (2) are fixedly connected to the first rotating rod (8) and the second rotating rod (16).

3. A waste heat recovery hydrolysis reaction device according to claim 1, characterized in that: A heating sleeve (10) is provided on the outside of the tank body (1), support frames (3) are fixedly connected to both ends of the outside of the tank body (1), and a base (4) is fixedly connected to the bottom of the support frame (3).

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