Urea pump mechanical seal protection device for urea processing

Abstract

The utility model relates to a urine pump mechanical seal protection device for urea processing. The urine pump mechanical seal protection device for urea processing comprises a pump body and evaporation equipment, an annular cavity is formed in the pump body, the annular cavity is divided into a gas recovery area and a gas isolation area, a plurality of gas outlet channels communicated with the gas recovery area are formed in the pump body, a plurality of gas inlet channels communicated with the gas isolation area are formed in the pump body, and the evaporation equipment is arranged in the pump body. The evaporation equipment comprises an evaporation tank, the air outlet channel is communicated with an air inlet of the evaporation tank through an air inlet pipe, and the air inlet channel is communicated with an air outlet of the evaporation tank through an air outlet pipe. Compared with the prior art, according to the urine pump mechanical seal protection device for urea processing, an existing steam system pipe network is utilized, low-pressure steam enters the pump filler box through pipeline connection, an outlet of the filler box is connected to a closed recovery system, steam circulation at the mechanical seal position is always kept by adjusting the opening degree of a steam valve, and therefore the mechanical seal is protected. Meanwhile, the leakage of the mechanical seal can be analyzed and judged through the ammonia content of gas at an exhaust port.

Description

Technical Field

[0001] The utility model belongs to the technical field of urine pumps, and in particular relates to a urine pump machine seal protection device for urea processing. Background Art

[0002] Urine pumps are usually used in triamine workshops to transport molten urea liquid (containing 2% trichloromelamine powder and a small amount of isocyanic acid) in urea production. Compared with other media, this medium has the characteristics of high temperature, easy crystallization and strong adsorption. When these three factors exist at the same time, higher requirements are placed on the pump and sealing structure.

[0003] During the operation of the urine pump in the urea production unit, liquid urea leaks through the mechanical seal, polluting the environment. At the same time, the mechanical seal is easily blocked, causing damage to the mechanical seal and frequent maintenance. Utility Model Content

[0004] In view of the above technical problems, the utility model provides a urine pump machine seal protection device for urea processing.

[0005] The technical solution of a urine pump seal protection device for urea processing in the utility model is:

[0006] A urine pump seal protection device for urea processing comprises a pump body and an evaporation device, wherein an annular cavity is provided inside the pump body, and the annular cavity is divided into a gas recovery area and a gas isolation area, a plurality of gas outlet channels connected to the gas recovery area are provided inside the pump body, a plurality of gas inlet channels connected to the gas isolation area are provided inside the pump body, and the evaporation device comprises an evaporation tank, the gas outlet channel is connected to the gas inlet of the evaporation tank through an gas inlet pipe, and the gas inlet channel is connected to the gas outlet of the evaporation tank through an gas outlet pipe.

[0007] Furthermore, the air intake pipe includes an air intake main pipe and a plurality of air intake branch pipes, the plurality of air intake branch pipes are connected to the air intake main pipe via an air intake joint, and the plurality of air intake branch pipes are connected to each of the air intake channels one by one.

[0008] Furthermore, the air outlet pipe includes an air outlet main pipe and a plurality of air outlet branch pipes, the plurality of air outlet branch pipes are connected to the air outlet main pipe via an air outlet joint, and the plurality of air outlet branch pipes are connected to each of the air outlet channels one by one.

[0009] Furthermore, an agitator is rotatably installed in the evaporator, and a driving motor for driving the agitator to rotate is provided on the evaporator. The air outlet main pipe is connected to the air inlet of the heat exchange device, and the liquid outlet of the heat exchange device is connected to the outer wall of the evaporator through the liquid outlet pipe. A steam pipe is provided at the upper end of the evaporator, and the steam pipe is connected to the air inlet main pipe.

[0010] Furthermore, a discharge pipe is provided at the lower end of the evaporation tank, a collecting tank is provided at the lower end of the evaporation tank, an overflow pipe is provided at the upper end of the evaporation tank, and the overflow pipe is connected to the discharge pipe.

[0011] Furthermore, a first liquid adding pipe and a second liquid adding pipe are provided at the lower end of the evaporator, the ends of the first liquid adding pipe and the second liquid adding pipe are connected to the liquid adding main pipe through a three-way joint, the first liquid adding pipe is provided with a first delivery pump, and the second liquid adding pipe is provided with a second delivery pump.

[0012] The utility model provides a urine pump seal protection device for urea processing, which has the following advantages compared with the prior art:

[0013] The urine pump seal protection device for urea processing of the utility model utilizes the existing steam system pipe network to connect a low-pressure steam into the pump stuffing box through a pipe, and the stuffing box outlet is connected to a closed recovery system. By adjusting the opening of the steam valve, steam is always kept flowing at the seal. At the same time, when the seal leaks, it can be determined by analyzing the ammonia content of the exhaust gas. The urine pump seal protection device for urea processing of the utility model effectively avoids blockage and damage to the seal caused by seal leakage. The urine pump seal protection device for urea processing of the utility model has a small investment, is easy to operate and control, does not affect the use of the equipment after being put into use, and prolongs the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a pump body in a mechanical seal protection device for a urine pump for urea processing of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the evaporation equipment in the urine pump machine seal protection device for urea processing of the utility model;

[0016] Numbers in the figure: 1. pump body; 2. air inlet channel; 3. air outlet channel; 4. air inlet branch pipe; 5. air inlet main pipe; 6. air outlet branch pipe; 7. air outlet main pipe; 8. evaporator; 9. agitator; 10. drive motor; 11. liquid outlet pipe; 12. steam pipe; 13. discharge pipe; 14. overflow pipe; 15. first liquid adding pipe; 16. second liquid adding pipe; 17. first delivery pump; 18. second delivery pump; 19. liquid adding main pipe. DETAILED DESCRIPTION

[0017] The utility model is further described in detail below with reference to the accompanying drawings and specific implementation methods:

[0018] The specific embodiment of the urine pump seal protection device for urea processing of the utility model is as follows: Figure 1 , Figure 2As shown, it includes a pump body 1 and an evaporation device. The pump body 1 is provided with an annular cavity inside, and the annular cavity is divided into a gas recovery area and a gas isolation area. The pump body 1 is provided with a plurality of gas outlet channels 3 connected to the gas recovery area, and the pump body 1 is provided with a plurality of gas inlet channels 2 connected to the gas isolation area. The evaporation device includes an evaporation tank 8. The gas outlet channel 3 is connected to the gas inlet of the evaporation tank 8 through an gas inlet pipe, and the gas inlet channel 2 is connected to the gas outlet of the evaporation tank 8 through an gas outlet pipe.

[0019] The air inlet pipe includes an air inlet main pipe 5 and a plurality of air inlet branch pipes 4, the plurality of air inlet branch pipes 4 are connected to the air inlet main pipe 5 through an air inlet joint, and the plurality of air inlet branch pipes 4 are connected one by one with each air inlet passage 2. The air outlet pipe includes an air outlet main pipe 7 and a plurality of air outlet branch pipes 6, the plurality of air outlet branch pipes 6 are connected to the air outlet main pipe 7 through an air outlet joint, and the plurality of air outlet branch pipes 6 are connected one by one with each air outlet passage 3.

[0020] A stirrer 9 is rotatably installed in the evaporator 8, and a driving motor 10 for driving the stirrer 9 is provided on the evaporator 8. The air outlet main pipe 7 is connected to the air inlet of the heat exchange device, and the liquid outlet of the heat exchange device is connected to the outer wall of the evaporator 8 through the liquid outlet pipe 11. A steam pipe 12 is provided at the upper end of the evaporator 8, and the steam pipe 12 is connected to the air inlet main pipe 5. A discharge pipe 13 is provided at the lower end of the evaporator 8, a collection tank is provided at the lower end of the evaporator 8, and an overflow pipe 14 is provided at the upper end of the evaporator 8, and the overflow pipe 14 is connected to the discharge pipe 13.

[0021] A first liquid adding pipe 15 and a second liquid adding pipe 16 are provided at the lower end of the evaporator 8. The ends of the first liquid adding pipe 15 and the second liquid adding pipe 16 are connected to the liquid adding main pipe 19 through a three-way joint. The first liquid adding pipe 15 is provided with a first delivery pump 17, and the second liquid adding pipe 16 is provided with a second delivery pump 18.

[0022] The urine pump seal protection device for urea processing of the utility model utilizes the existing steam system pipe network, connects a low-pressure steam through a pipe to enter the pump stuffing box, and the stuffing box outlet is connected to the closed recovery system. By adjusting the opening of the steam valve, steam is always kept flowing at the seal. At the same time, when the seal leaks, it can be determined by analyzing the ammonia content of the gas at the outlet. It effectively avoids blockage and damage of the seal caused by seal leakage. The urine pump seal protection device for urea processing of the utility model has a small investment, is easy to operate and control, does not affect the use of the equipment after being put into use, and prolongs the service life of the equipment.

[0023] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A urine pump seal protection device for urea processing, characterized in that: The invention comprises a pump body and an evaporation device, wherein an annular cavity is arranged inside the pump body, and the annular cavity is divided into a gas recovery area and a gas isolation area, wherein a plurality of gas outlet channels connected with the gas recovery area are arranged inside the pump body, and a plurality of gas inlet channels connected with the gas isolation area are arranged inside the pump body, and the evaporation device comprises an evaporation tank, wherein the gas outlet channel is connected with the gas inlet of the evaporation tank through an gas inlet pipe, and the gas inlet channel is connected with the gas outlet of the evaporation tank through an gas outlet pipe.

2. The urine pump seal protection device for urea processing according to claim 1, characterized in that: The air intake pipe includes an air intake main pipe and a plurality of air intake branch pipes, the plurality of air intake branch pipes are connected to the air intake main pipe via an air intake joint, and the plurality of air intake branch pipes are connected to each of the air intake channels one by one.

3. The urine pump seal protection device for urea processing according to claim 2, characterized in that: The air outlet pipe includes an air outlet main pipe and a plurality of air outlet branch pipes, the plurality of air outlet branch pipes are connected to the air outlet main pipe via an air outlet joint, and the plurality of air outlet branch pipes are connected to each of the air outlet channels one by one.

4. The urine pump seal protection device for urea processing according to claim 3, characterized in that: A stirrer is rotatably installed in the evaporator, and a driving motor for driving the stirrer to rotate is provided on the evaporator. The air outlet main pipe is connected to the air inlet of the heat exchange device, and the liquid outlet of the heat exchange device is connected to the outer wall of the evaporator through the liquid outlet pipe. A steam pipe is provided at the upper end of the evaporator, and the steam pipe is connected to the air inlet main pipe.

5. The urine pump seal protection device for urea processing according to claim 4, characterized in that: A discharge pipe is provided at the lower end of the evaporation tank, a collecting tank is provided at the lower end of the evaporation tank, an overflow pipe is provided at the upper end of the evaporation tank, and the overflow pipe is communicated with the discharge pipe.

6. The urine pump seal protection device for urea processing according to claim 5, characterized in that: A first liquid adding pipe and a second liquid adding pipe are provided at the lower end of the evaporator, the ends of the first liquid adding pipe and the second liquid adding pipe are connected to the liquid adding main pipe through a three-way joint, the first liquid adding pipe is provided with a first delivery pump, and the second liquid adding pipe is provided with a second delivery pump.

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