A desulfurization liquid sealed circulation cooling system and cooling method thereof

Abstract

The invention discloses a desulfurization liquid sealed circulation cooling system, comprising a circulation pump, a circulation pump sealed cooling chamber is arranged on one side of the circulation pump, a motor fixedly connected to the circulation pump sealed cooling chamber is arranged on one side of the circulation pump, a circulation pump inlet pipe and a circulation pump outlet pipe are respectively arranged on the side walls of the circulation pump, a first three-way connector and a circulation pump inlet valve are arranged in sequence on the pipe wall of the circulation pump inlet pipe, a second three-way connector and a circulation pump outlet valve are arranged in sequence on the pipe wall of the circulation pump outlet pipe, the first three-way connector and the second three-way connector are respectively connected to the mechanical seal cooling medium pipes arranged at both ends of the circulation pump sealed cooling chamber. The invention has the following beneficial effects: the desulfurization liquid cools and lubricates the machinery, the cooling water is recycled and reused, the machinery is prevented from being burned due to water outage, the problem of increased desulfurization liquid content in the system is solved, industrial water can be used as cooling water when the outlet flow of the desulfurization liquid circulation pump is zero, and the reliability of the desulfurization liquid sealed circulation cooling system is increased.

Description

Technical Field

[0001] The present invention belongs to the technical field of chemical equipment, and more specifically, relates to a desulfurization liquid sealed circulation cooling system and a cooling method thereof. Background Art

[0002] The wet desulfurization process is one of the mainstream processes for wet desulfurization of coal gas in coking enterprises. The wet desulfurization process uses ammonia water obtained from ammonia evaporation as an alkali source to absorb acidic gases such as H2S in coke oven gas, thereby achieving the purpose of gas desulfurization. In actual production, it was found that the water balance of the desulfurization device was difficult to establish, the total amount of desulfurization liquid in the system continued to increase, and there was a "liquid swelling" phenomenon.

[0003] The volume of the desulfurization system is fixed. The increase in the total amount of desulfurization liquid occupies the available volume of the system, affecting the desulfurization efficiency of the system. The increase in the total amount of desulfurization liquid increases the discharge of desulfurization waste liquid. The desulfurization waste liquid contains high concentrations of salts such as (NH4)2S2O3, (NH4)2SO4 and NH4CN, which can also cause the inactivation and death of microorganisms. It is a coking wastewater that is difficult to treat. At the same time, the desulfurization liquid in the wet desulfurization device is highly corrosive. The excess desulfurization liquid is sent to the coal yard for coal blending, which will cause serious corrosion to mechanical equipment such as coal towers and coal trucks, and at the same time affect the on-site environmental protection and civilized production, and increase the energy consumption of the coke oven. Summary of the invention

[0004] The object of the invention is to provide a HPF desulfurization liquid sealed circulation cooling system and a cooling method thereof for avoiding leakage of the mechanical seal of the desulfurization liquid circulation pump.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A desulfurization liquid sealed circulation cooling system disclosed in the present invention comprises a circulation pump, a circulation pump sealed cooling chamber is arranged on one side of the circulation pump, a motor fixedly connected to the circulation pump sealed cooling chamber is arranged on one side of the circulation pump, a circulation pump inlet pipe and a circulation pump outlet pipe are respectively arranged on the side walls of the circulation pump, a first three-way connector and a circulation pump inlet valve are arranged in sequence on the pipe wall of the circulation pump inlet pipe, a second three-way connector and a circulation pump outlet valve are arranged in sequence on the pipe wall of the circulation pump outlet pipe, and the first three-way connector and the second three-way connector are respectively connected to mechanical seal cooling medium pipes arranged at both ends of the circulation pump sealed cooling chamber.

[0007] The invention discloses a desulfurization liquid sealed circulation cooling system, wherein the side walls of the circulation pump are respectively provided with a circulation pump inlet connected to a circulation pump inlet pipe and a circulation pump outlet connected to a circulation pump outlet pipe.

[0008] The present invention discloses a desulfurization liquid sealed circulating cooling system, wherein a mechanical sealed desulfurization liquid inlet valve, a third three-way connector and a filter are sequentially arranged on the pipe wall of a mechanical sealed cooling medium pipeline between a circulating pump sealed cooling chamber and a second three-way connector, an input end of the mechanical sealed desulfurization liquid inlet valve is connected to the second three-way connector pipeline, a mechanical sealed cooling water inlet valve connected to its pipeline is arranged at one end of the third three-way connector, and an output end of the filter is connected to the circulating pump sealed cooling chamber through a pipeline.

[0009] The present invention discloses a desulfurization liquid sealed circulating cooling system, wherein a mechanical sealed desulfurization liquid outlet valve and a fourth three-way connector are sequentially arranged on the wall of a mechanical sealed cooling medium pipeline between a circulating pump sealed cooling chamber and a first three-way connector, an input end of the mechanical sealed desulfurization liquid outlet valve is connected to the fourth three-way connector, and an output end is connected to the first three-way connector pipeline, and a mechanical sealed cooling water outlet valve connected to its pipeline is arranged at one end of the fourth three-way connector.

[0010] The invention discloses a desulfurization liquid sealed circulation cooling system, wherein a coupling for controlling the rotation of the sealed cooling chamber of a circulating pump is arranged between the sealed cooling chamber of the circulating pump and a motor.

[0011] The invention discloses a desulfurization liquid sealed circulation cooling system, wherein the output end of the circulation pump outlet valve is provided with a desulfurization liquid cooling pool connected with the pipeline thereof.

[0012] The invention discloses a desulfurization liquid sealed circulation cooling system, wherein the output end of the mechanical seal cooling water outlet valve is provided with a cooling water recovery pool connected with the pipeline thereof.

[0013] The present invention discloses a cooling method for desulfurization liquid, comprising the following steps:

[0014] S1. Open the circulation pump inlet valve according to the desulfurization liquid flow rate and control its opening degree. The desulfurization liquid enters the circulation pump through the circulation pump inlet pipe and then flows out from the circulation pump outlet pipe connected to the circulation pump outlet. Open the circulation pump outlet valve and control its opening degree according to the desulfurization liquid flow rate. The second three-way connector provided on the wall of the circulation pump outlet pipe diverts part of the desulfurization liquid to the mechanical seal cooling medium pipe, and the other part is discharged to the desulfurization liquid cooling pool through the circulation pump outlet valve.

[0015] S2. The desulfurization liquid enters the mechanical seal cooling medium pipeline through the mechanical seal desulfurization liquid inlet valve and is mixed with the cooling water entering the mechanical seal cooling medium pipeline through the mechanical seal cooling water inlet valve. The mixed liquid enters the circulating pump sealed cooling chamber for cooling. The cooled desulfurization liquid enters the circulating pump inlet pipeline through the mechanical seal cooling medium pipeline for recirculation. The mechanical seal desulfurization liquid outlet valve controls its opening according to its flow rate. The used cooling water is discharged to the cooling water recovery pool through the mechanical seal cooling water outlet valve connected to the mechanical seal cooling medium pipeline.

[0016] The technical solution disclosed in the present invention is adopted, by arranging a circulating pump sealed cooling chamber on one side of the circulating pump, a motor fixedly connected to the circulating pump sealed cooling chamber is arranged on one side of the circulating pump, a circulating pump inlet pipe and a circulating pump outlet pipe are arranged on the side wall of the circulating pump respectively, a first three-way connector and a circulating pump inlet valve are arranged on the pipe wall of the circulating pump inlet pipe in sequence, a second three-way connector and a circulating pump outlet valve are arranged on the pipe wall of the circulating pump outlet pipe in sequence, the first three-way connector and the second three-way connector are respectively connected to the mechanical seal cooling medium pipes arranged at both ends of the circulating pump sealed cooling chamber, and the desulfurized liquid is mixed with cooling water after passing through the circulating pump and then enters the circulating pump. The desulfurization liquid is cooled in the cooling chamber of the circulating pump seal. After cooling, the desulfurization liquid enters the circulating pump again for circulation. The cooling water is recovered after being discharged. The desulfurization liquid transported by the desulfurization liquid circulating pump itself is used to cool and lubricate the pump mechanical seal. The cooling water is recycled and reused to prevent the pump mechanical seal from burning due to water outage. The problem of increased desulfurization liquid content in the system due to cooling water leaking from the desulfurization liquid mechanical seal and entering the desulfurization liquid is solved. When the outlet flow of the desulfurization liquid circulating pump is zero, industrial water can be used as cooling water to cool the desulfurization liquid circulating pump mechanical seal, which increases the reliability of the desulfurization liquid circulating pump mechanical seal cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following is a brief description of the contents and symbols in the drawings of this specification:

[0018] Figure 1 It is a structural schematic diagram of a desulfurization liquid sealed circulation cooling system;

[0019] Figure 2 It is a flow chart of a desulfurization liquid sealed circulation cooling system;

[0020] The marks in the above figures are: 1. Circulation pump; 2. Circulation pump seal cooling chamber; 3. Motor; 4. Circulation pump inlet pipe; 5. Circulation pump outlet pipe; 6. First three-way connector; 7. Circulation pump inlet valve; 8. Second three-way connector; 9. Circulation pump outlet valve; 10. Mechanical seal cooling medium pipeline; 11. Circulation pump inlet; 12. Circulation pump outlet; 13. Mechanical seal desulfurization liquid inlet valve; 14. Third three-way connector; 15. Filter; 16. Mechanical seal cooling water inlet valve; 17. Mechanical seal desulfurization liquid outlet valve; 18. Fourth three-way connector; 19. Mechanical seal cooling water outlet valve; 20. Coupling; 21. Desulfurization liquid cooling tank; 22. Cooling water recovery tank. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] Figure 1 This is a structural schematic diagram of a desulfurization liquid sealed circulation cooling system of the present invention, as shown in the figure:

[0023] A desulfurization liquid sealed circulation cooling system disclosed in the present invention comprises a circulation pump 1, a circulation pump sealed cooling chamber 2 is arranged on one side of the circulation pump 1, a motor 3 fixedly connected to the circulation pump sealed cooling chamber 2 is arranged on one side of the circulation pump 1, a circulation pump inlet pipe 4 and a circulation pump outlet pipe 5 are respectively arranged on the side walls of the circulation pump 1, a first three-way connector 6 and a circulation pump inlet valve 7 are arranged in sequence on the pipe wall of the circulation pump inlet pipe 4, a second three-way connector 8 and a circulation pump outlet valve 9 are arranged in sequence on the pipe wall of the circulation pump outlet pipe 5, and the first three-way connector 6 and the second three-way connector 8 are respectively connected to the mechanical seal cooling medium pipes 10 arranged at both ends of the circulation pump sealed cooling chamber 2.

[0024] A circulating pump inlet 11 connected to the circulating pump inlet pipe 4 and a circulating pump outlet 12 connected to the circulating pump outlet pipe 5 are respectively arranged on the side walls of the circulating pump 1 .

[0025] A mechanical seal desulfurization liquid inlet valve 13, a third three-way connector 14 and a filter 15 are sequentially arranged on the pipe wall of the mechanical seal cooling medium pipeline 10 between the circulating pump sealed cooling chamber 1 and the second three-way connector 8. The input end of the mechanical seal desulfurization liquid inlet valve 13 is connected to the second three-way connector 8 by pipeline. A mechanical seal cooling water inlet valve 16 connected to its pipeline is arranged at one end of the third three-way connector 14. The output end of the filter 15 is connected to the circulating pump sealed cooling chamber 2 through a pipeline.

[0026] A mechanical seal desulfurization liquid outlet valve 17 and a fourth three-way connector 18 are sequentially arranged on the pipe wall of the mechanical seal cooling medium pipeline 10 between the circulating pump sealed cooling chamber 2 and the first three-way connector 6. The input end of the mechanical seal desulfurization liquid outlet valve 17 is connected to the fourth three-way connector 18, and the output end is connected to the first three-way connector 6 pipeline. A mechanical seal cooling water outlet valve 19 connected to its pipeline is arranged at one end of the fourth three-way connector 18.

[0027] A coupling 20 for controlling the rotation of the circulating pump sealed cooling chamber 2 is arranged between the circulating pump sealed cooling chamber 2 and the motor 3 .

[0028] A desulfurization liquid cooling pool 21 connected to the pipeline of the circulating pump outlet valve 9 is provided at the output end thereof.

[0029] A cooling water recovery tank 22 connected to the pipeline of the mechanical seal cooling water outlet valve 19 is provided at the output end thereof.

[0030] Open the circulation pump inlet valve 7 according to the flow rate of desulfurized liquid and control its opening degree. The desulfurized liquid enters the circulation pump 1 through the circulation pump inlet pipe 4 and then flows out from the circulation pump outlet pipe 5 connected to the circulation pump outlet 12. Open the circulation pump outlet valve 9 and control its opening degree according to the flow rate of desulfurized liquid. The second three-way connector 8 provided on the wall of the circulation pump outlet pipe 5 diverts part of the desulfurized liquid to the mechanical seal cooling medium pipe 10, and the other part is discharged to the desulfurized liquid cooling pool 21 through the circulation pump outlet valve 9;

[0031] The desulfurized liquid enters the mechanical seal cooling medium pipeline 10 through the mechanical seal desulfurized liquid inlet valve 17 and mixes with the cooling water entering the mechanical seal cooling medium pipeline 0 through the mechanical seal cooling water inlet valve 16. The mixed liquid enters the circulating pump sealed cooling chamber 1 for cooling. The cooled desulfurized liquid enters the circulating pump inlet pipeline 4 through the mechanical seal cooling medium pipeline 10 for recirculation. The opening of the mechanical seal desulfurized liquid outlet valve 17 is controlled according to its flow rate. The used cooling water is discharged to the cooling water recovery pool 22 through the mechanical seal cooling water outlet valve 19 connected to the mechanical seal cooling medium pipeline 10.

[0032] According to the technical solution disclosed in the present invention, a circulating pump sealed cooling chamber 2 is arranged on one side of the circulating pump 1, a motor 3 fixedly connected to the circulating pump sealed cooling chamber 2 is arranged on one side of the circulating pump 1, a circulating pump inlet pipe 4 and a circulating pump outlet pipe 5 are arranged on the side wall of the circulating pump 1, a first three-way connector 6 and a circulating pump inlet valve 7 are arranged on the pipe wall of the circulating pump inlet pipe 4 in sequence, a second three-way connector 8 and a circulating pump outlet valve 9 are arranged on the pipe wall of the circulating pump outlet pipe 5 in sequence, the first three-way connector 6 and the second three-way connector 8 are respectively connected to the mechanical seal cooling medium pipes 10 arranged at both ends of the circulating pump sealed cooling chamber 2, and the desulfurized liquid passes through the circulating pump 1 and is connected to the circulating pump 1. The cooling water is mixed and then enters the circulating pump seal cooling chamber 2 for cooling. After cooling, the desulfurization liquid enters the circulating pump 1 again for circulation. The cooling water is discharged and then recycled. The desulfurization liquid transported by the desulfurization liquid circulating pump itself is used to cool and lubricate the pump mechanical seal. The cooling water is recycled and reused to prevent the pump mechanical seal from burning due to water outage. The problem of increased desulfurization liquid content in the system due to cooling water entering the desulfurization liquid due to leakage of the desulfurization liquid mechanical seal is solved. When the outlet flow of the desulfurization liquid circulating pump is zero, industrial water can be used as cooling water to cool the desulfurization liquid circulating pump mechanical seal, which increases the reliability of the desulfurization liquid circulating pump mechanical seal cooling system.

[0033] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A cooling method for a desulfurization liquid sealed circulation cooling system, comprising a desulfurization liquid sealed circulation cooling system, the system having a circulation pump, wherein: A circulating pump sealed cooling chamber is arranged on one side of the circulating pump, a motor fixedly connected thereto is arranged on one side of the circulating pump sealed cooling chamber, a circulating pump inlet pipe and a circulating pump outlet pipe are arranged on the side walls of the circulating pump respectively, a first three-way connector and a circulating pump inlet valve are arranged on the pipe wall of the circulating pump inlet pipe in sequence, a second three-way connector and a circulating pump outlet valve are arranged on the pipe wall of the circulating pump outlet pipe in sequence, the first three-way connector and the second three-way connector are respectively connected to the mechanically sealed cooling medium pipes arranged at both ends of the circulating pump sealed cooling chamber; a circulating pump inlet connected to the circulating pump inlet pipe and a circulating pump outlet connected to the circulating pump outlet pipe are respectively arranged on the side walls of the circulating pump; a mechanically sealed desulfurization liquid inlet valve, a third three-way connector and a filter are arranged on the pipe wall of the mechanically sealed cooling medium pipe between the circulating pump sealed cooling chamber and the second three-way connector, the input end of the mechanically sealed desulfurization liquid inlet valve is connected to the second three-way connector. The third three-way connector is connected with a pipeline, a mechanical seal cooling water inlet valve connected with its pipeline is arranged at one end of the third three-way connector, and the output end of the filter is connected with the circulating pump sealed cooling chamber through a pipeline; a mechanical seal desulfurization liquid outlet valve and a fourth three-way connector are arranged on the pipe wall of the mechanical seal cooling medium pipeline between the circulating pump sealed cooling chamber and the first three-way connector in sequence, the input end of the mechanical seal desulfurization liquid outlet valve is connected with the fourth three-way connector, and the output end is connected with the first three-way connector pipeline, and a mechanical seal cooling water outlet valve connected with its pipeline is arranged at one end of the fourth three-way connector; a coupling for controlling the rotation of the circulating pump sealed cooling chamber is arranged between the circulating pump sealed cooling chamber and the motor; a desulfurization liquid cooling pool connected with its pipeline is arranged at the output end of the circulating pump outlet valve; a cooling water recovery pool connected with its pipeline is arranged at the output end of the mechanical seal cooling water outlet valve; The cooling method using the desulfurization liquid sealed circulation cooling system is characterized by comprising the following steps: S1. Open the circulation pump inlet valve according to the desulfurization liquid flow rate and control its opening degree. The desulfurization liquid enters the circulation pump through the circulation pump inlet pipe and then flows out from the circulation pump outlet pipe connected to the circulation pump outlet. Open the circulation pump outlet valve and control its opening degree according to the desulfurization liquid flow rate. The second three-way connector provided on the wall of the circulation pump outlet pipe diverts part of the desulfurization liquid to the mechanical seal cooling medium pipe, and the other part is discharged to the desulfurization liquid cooling pool through the circulation pump outlet valve. S2. The desulfurization liquid enters the mechanical seal cooling medium pipeline through the mechanical seal desulfurization liquid inlet valve and is mixed with the cooling water entering the mechanical seal cooling medium pipeline through the mechanical seal cooling water inlet valve. The mixed liquid enters the circulating pump sealed cooling chamber for cooling. The cooled desulfurization liquid enters the circulating pump inlet pipeline through the mechanical seal cooling medium pipeline for recirculation. The mechanical seal desulfurization liquid outlet valve controls its opening according to its flow rate. The used cooling water is discharged to the cooling water recovery pool through the mechanical seal cooling water outlet valve connected to the mechanical seal cooling medium pipeline.

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