Double-water-source system for desulfurization process water and demister flushing water

Abstract

The utility model discloses a double-water-source system for desulfurization process water and demister flushing water, which comprises a process water tank, at least two sets of process water systems communicated with the process water tank and at least two sets of demister flushing water systems, the demister flushing water system comprises a demister flushing water pipe and a demister flushing water pump which are communicated with the absorption tower, a communicating pipe is arranged between the process water pipe and the demister flushing water pipe, a first isolation valve is arranged on the communicating pipe, and a recycled water pipeline is arranged at a liquid outlet of the equipment and the absorption tower. A clarification device, a water purification tank and a water return pump are sequentially arranged on the recycled water pipeline; an outlet of the water return pump is respectively communicated with the equipment and a water inlet of the absorption tower. After improvement, the process water pump and the demister flushing water pump can be guaranteed to be mutually standby, the utilization efficiency of the pumps is improved, water can flow back and be recycled, and energy conservation and environmental protection are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wet desulphurization system, in particular to a double water source system of desulphurization process water and demister flushing water. BACKGROUND

[0002] The wet desulphurization system of thermal power plant can consume a large amount of process water, therefore, the process water pump plays a vital role in the whole wet desulphurization system. In the process water system of wet desulphurization, the water demand of demister flushing is large, which is the main way of absorption tower water supplement, and the demister flushing water pump is an important equipment for maintaining the normal operation of the absorption tower. A large amount of water cannot be recycled and utilized, which is not energy-saving and environment-friendly.

[0003] At present, the process water of demister flushing water, vacuum belt dewatering machine filter cloth flushing water and other equipment in the wet desulphurization system of most power plants shares a water tank. The process water of the wet desulphurization system is delivered to the process water tank by the water pump, and the water in the process water tank is delivered to the water and flushing water of the absorption tower and other equipment by the demister flushing water pump and the process water pump respectively.

[0004] In the prior art, the process water pump and the demister flushing water pump are not connected with each other, which cannot be recycled and utilized, is not energy-saving and environment-friendly, and if any of the water pumps fails during operation, the whole wet desulphurization system cannot be put into operation, which affects the safe and stable operation of the whole wet desulphurization system. UTILITY MODEL CONTENTS

[0005] To solve the problems in the prior art, the utility model provides a double water source system of desulphurization process water and demister flushing water, which can make the process water pump and the demister flushing water pump serve as backup for each other, recycle water, save energy and protect the environment.

[0006] The technical scheme adopted by the utility model is as follows.

[0007] A double water source system of desulphurization process water and demister flushing water, comprising a process water tank, at least two sets of process water systems and at least two sets of demister flushing water systems which are communicated with the process water tank, the process water system comprising a process water pipe and a process water pump which are communicated with equipment, the demister flushing water system comprising a demister flushing water pipe and a demister flushing water pump which are communicated with an absorption tower, a communicating pipe is arranged between the process water pipe at the outlet section of the process water pump and the demister flushing water pipe at the outlet section of the demister flushing water pump, a first isolation valve is arranged on the communicating pipe, a recovery water pipe is arranged on the liquid outlet of the equipment and the liquid outlet of the absorption tower, a clarifying device, a clean water tank and a water recovery pump are arranged on the recovery water pipe in sequence, and the outlet of the water recovery pump is communicated with the water inlet of the equipment and the water inlet of the absorption tower respectively.

[0008] Preferably, a second isolation valve is installed on the process water pipe at the outlet section of the process water pump between the two adjacent process water systems; and a third isolation valve is installed on the demister flushing water pipe at the outlet section of the demister flushing water pump between the two adjacent demister flushing water systems.

[0009] Preferably, the first isolation valve, the second isolation valve, and the third isolation valve are manual valves.

[0010] Preferably, in each process water system, a manual valve is installed on the process water pipe at the inlet of the process water pump, and an electric valve is installed on the process water pipe at the outlet of the process water pump; in each demister flushing water system, a manual valve is installed on the demister flushing water pipe at the inlet of the demister flushing water pump, and an electric valve is installed on the demister flushing water pipe at the outlet of the demister flushing water pump.

[0011] There are two options for installing the recycled water pipeline:

[0012] One proposed solution is to connect the liquid outlet of the device and the liquid outlet of the absorption tower through a pipeline and then install a recycled water pipeline.

[0013] Another option is to provide recycled water pipes for the liquid outlet of the device and the liquid outlet of the absorption tower.

[0014] Preferably, a manual valve is installed at the inlet of the recycled water pipeline, and an electric valve is installed at the outlet of the recycled water pipeline; the outlet of the manual valve on the recycled water pipeline is connected to the inlet of the clarification device, the outlet of the clarification device is connected to the inlet of the clean water tank, the outlet of the clean water tank is connected to the inlet of the return water pump, and the outlet of the return water pump is connected to the inlet of the equipment and the inlet of the absorption tower respectively through the electric valve.

[0015] Preferably, the clarification device is a filter device equipped with a cleaning agent, or it can be a settling tank as in the prior art. Solid-liquid separation is achieved through filtration or settling. The solids settle in the clarification device, and the liquid at the outlet of the equipment and the liquid at the outlet of the absorption tower are processed by the clarification device through a recovery water pipeline. The usable water can be collected in a clean water tank and then circulated back to the flushing pipeline by a return water pump.

[0016] The technical solution of this utility model produces the following beneficial effects:

[0017] The process water and demister flushing water in wet desulfurization systems do not have high requirements for water quality. General industrial water quality can meet their requirements. The process water pump and the demister flushing water pump share a water tank.

[0018] By improving the existing pipelines of the process water pump and the demister flushing water pump, connecting the two pipelines in series, and installing isolation valves, it can be ensured that the process water pump and the demister flushing water pump can serve as backups for each other without affecting the normal operation of the desulfurization system.

[0019] The demand for demister flushing water is relatively large. When the demister flushing water pump is not working properly, a process water pump is used instead to flush the demister. Simultaneously, when the process water pump is not working properly, the demister flushing water pump is used instead to provide water to other process equipment.

[0020] Manual valves are installed on the pipeline for convenient isolation and maintenance, while electric valves enable remote control and reduce manual operation. The addition of manual isolation valves not only facilitates maintenance but also allows for switching according to usage conditions, ensuring the normal operation of the absorption tower and other process equipment, improving pump utilization efficiency, reducing operating costs, and achieving better economic benefits.

[0021] In addition, by installing clarification devices, clean water tanks, and return water pumps on the recycled water pipeline, the water can be recycled back to the absorption tower and equipment, which is energy-saving and environmentally friendly. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural schematic diagram of one embodiment of the present invention;

[0024] Figure 2 This is a structural schematic diagram of another embodiment of the present invention.

[0025] In the diagram: 1-Process water tank, 2-Equipment, 3-Absorption tower, 4-Process water pipe, 5-Process water pump, 6-Demister flushing water pipe, 7-Demister flushing water pump, 8-Connecting pipe, 9-First isolation valve, 10-Recovery water pipe, 11-Clarification device, 12-Clean water tank, 13-Return water pump, 14-Second isolation valve, 15-Third isolation valve, 16-Manual valve, 17-Electric valve. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] In this specification, similar reference numerals in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] Please refer to Figure 1 and Figure 2 This embodiment provides a dual-source water system for desulfurization process water and demister flushing water, including a process water tank 1, at least two sets of process water systems connected to the process water tank 1, and at least two sets of demister flushing water systems. The process water system includes a process water pipe 4 connected to equipment 2 and a process water pump 5. The demister flushing water system includes a demister flushing water pipe 6 connected to the absorption tower 3 and a demister flushing water pump 7. A connecting pipe 8 is provided between the process water pipe 4 at the outlet section and the demister flushing water pipe 6 at the outlet section of the demister flushing water pump 7, and a first isolation valve 9 is provided on the connecting pipe 8. A recovery water pipe 10 is provided at the liquid outlet of equipment 2 and the liquid outlet of absorption tower 3. A clarification device 11, a clean water tank 12, and a return water pump 13 are sequentially installed on the recovery water pipe 10. The outlet of the return water pump 13 is connected to the inlet of equipment 2 and the inlet of absorption tower 3, respectively.

[0029] In a preferred embodiment, a second isolation valve 14 is installed on the process water pipe 4 at the outlet section of the process water pump 5 between two adjacent process water systems. A third isolation valve 15 is installed on the demister flushing water pipe 6 at the outlet section of the demister flushing water pump 7 between two adjacent demister flushing water systems. The first isolation valve 9, the second isolation valve 14, and the third isolation valve 15 are manual valves.

[0030] In a preferred embodiment, in each process water system, a manual valve 16 is installed on the process water pipe 4 at the inlet of the process water pump 5, and an electric valve 17 is installed on the process water pipe 4 at the outlet of the process water pump 5. In each demister flushing water system, a manual valve 16 is installed on the demister flushing water pipe 6 at the inlet of the demister flushing water pump 7, and an electric valve 17 is installed on the demister flushing water pipe 6 at the outlet of the demister flushing water pump 7.

[0031] As a preferred implementation method, such as Figure 1 As shown, the liquid outlet of device 2 and the liquid outlet of absorption tower 3 are connected by a pipeline and a recovery water pipeline 10 is installed.

[0032] As a preferred implementation method, such as Figure 2 As shown, the liquid outlet of device 2 and the liquid outlet of absorption tower 3 are respectively equipped with a recovery water pipe 10.

[0033] In a preferred embodiment, a manual valve 16 is installed at the inlet of the recycled water pipe 10, and an electric valve 17 is installed at the outlet of the recycled water pipe 10. The outlet of the manual valve 16 on the recycled water pipe 10 is connected to the inlet of the clarification device 11, the outlet of the clarification device 11 is connected to the inlet of the clean water tank 12, the outlet of the clean water tank 12 is connected to the inlet of the return water pump 13, and the outlet of the return water pump 13 is connected to the inlet of the equipment 2 and the inlet of the absorption tower 3 respectively through the electric valve 17.

[0034] In a preferred embodiment, the clarification device 11 is a filter device equipped with a cleaning agent, or it can be a settling tank as in the prior art. Solid-liquid separation is achieved through filtration or settling. The solids are deposited in the clarification device 11. The liquid from the outlet of the equipment 2 and the liquid from the outlet of the absorption tower 3 pass through the recovery water pipe 10 and are treated by the clarification device 5. The usable water can be collected in the clean water tank 12 and then circulated to the flushing pipeline by the return water pump 13.

[0035] Example 1

[0036] like Figure 1 As shown, the dual water source system for desulfurization process water and demister flushing water includes process water tank 1, three sets of process water systems connected to process water tank 1, and three sets of demister flushing water systems.

[0037] Each process water system includes a process water pipe 4 and a process water pump 5 connected to equipment 2; a manual valve 16 is installed on the process water pipe 4 at the inlet of the process water pump 5, and an electric valve 17 is installed on the process water pipe 4 at the outlet of the process water pump 5.

[0038] Each demister flushing water system includes a demister flushing water pipe 6 connected to the absorption tower 3 and a demister flushing water pump 7; a manual valve 16 is installed on the demister flushing water pipe 6 at the inlet of the demister flushing water pump 7, and an electric valve 17 is installed on the demister flushing water pipe 6 at the outlet of the demister flushing water pump 7.

[0039] A second isolation valve 14 is installed on the process water pipe 4 at the outlet section of the process water pump 5 between two adjacent process water systems. A third isolation valve 15 is installed on the demister flushing water pipe 6 at the outlet section of the demister flushing water pump 7 between two adjacent demister flushing water systems.

[0040] A connecting pipe 8 is provided between the process water pipe 4 at the outlet section of the process water pump 5 and the demister flushing water pipe 6 at the outlet section of the demister flushing water pump 7, and a first isolation valve 9 is provided on the connecting pipe 8.

[0041] The first isolation valve 9, the second isolation valve 14, and the third isolation valve 15 are manual valves.

[0042] A recovery water pipeline 10 is installed between the liquid outlet of device 2 and the liquid outlet of absorption tower 3 via a concatenated pipeline. A manual valve 16 is installed at the inlet of the recovery water pipeline 10, and an electric valve 17 is installed at the outlet of the recovery water pipeline 10. The outlet of the manual valve 16 on the recovery water pipeline 10 is connected to the inlet of the clarification device 11, the outlet of the clarification device 11 is connected to the inlet of the clean water tank 12, the outlet of the clean water tank 12 is connected to the inlet of the return water pump 13, and the outlet of the return water pump 13 is connected to the inlet of both device 2 and absorption tower 3 via the electric valve 17.

[0043] The clarification device 11 can be a settling tank in the prior art, which achieves solid-liquid separation through settling. The solids are deposited in the clarification device 11. The liquid at the outlet of the equipment 2 and the liquid at the outlet of the absorption tower 3 are processed by the clarification device 5 through the recovery water pipe 10. The usable water can be collected in the clean water tank 12 and then circulated to the flushing pipeline through the return water pump 13.

[0044] When using the dual-source water system of desulfurization process water and demister flushing water in Example 1:

[0045] The three process water systems open the corresponding manual valves 16 and electric valves 17 according to the water volume required by equipment 2, and supply water to equipment 2 through process water pump 5 and process water pipe 4. If one of the process water pumps 5 malfunctions and needs to be repaired, the manual valve 16 in the faulty process water system is closed, and the manual valve 16 is reopened as needed after the repair is completed.

[0046] When the water demand of equipment 2 is large and all three process water pumps 5 cannot be used normally, open the first isolation valve 9 on the connecting pipe 8 and use the demister to flush the water pump 7 to replace the process water pump 5 to provide water for equipment 2.

[0047] The three demister flushing water systems open the corresponding manual valves 16 and electric valves 17 according to the water volume required by the absorption tower 3, and supply flushing water to the absorption tower 3 through the demister flushing water pump 7 and the demister flushing water pipe 6. If one of the demister flushing water systems malfunctions and needs maintenance, the manual valve 16 in the malfunctioning demister flushing water system is closed, and the manual valve 16 is reopened as needed after maintenance is completed.

[0048] When the demand for demister flushing water in absorption tower 3 is large and all three demister flushing water pumps 7 cannot be used normally, open the first isolation valve 9 on the connecting pipe 8 and use the process water pump 5 to replace the demister flushing water pump 7 to provide water for equipment 2.

[0049] This ensures that the process water pump 5 and the demister flushing water pump 7 can serve as backups for each other without affecting the normal operation of the desulfurization system.

[0050] The liquids from the outlets of equipment 2 and absorption tower 3 are in high demand. The liquids from the outlets of equipment 2 and absorption tower 3 can be collected by the recovery water pipeline 10 after being connected by a pipeline. The liquids are then purified and recovered by the clarification device 11 and the clean water tank 12. The purified water can be returned to equipment 2 and absorption tower 3 for recycling through the return water pump 13.

[0051] Manual valves 16 are installed on the water system pipelines for easy isolation and maintenance, while electric valves 17 enable remote control and reduce manual operation. The addition of manual first isolation valves 9, second isolation valves 14 and third isolation valves 15 not only facilitates maintenance but also allows switching according to usage conditions, ensuring the normal operation of equipment 2 and absorption tower 3 and improving pump utilization efficiency.

[0052] Example 2

[0053] like Figure 2 As shown, the dual-source water system for desulfurization process water and demister flushing water includes a process water tank 1, three sets of process water systems connected to the process water tank 1, and three sets of demister flushing water systems. Example 2 differs from Example 1 in that the liquid outlet of device 2 and the liquid outlet of absorption tower 3 are respectively equipped with recovery water pipes 10.

[0054] The usage method is basically the same as in Example 1, except that: the liquid at the outlet of device 2 and the liquid at the outlet of absorption tower 3 are purified and recovered by the clarification device 11 and the clean water tank 12 on the recovery water pipeline 10, respectively, and the purified water is returned to device 2 and absorption tower 3 for recycling by the return water pump 13.

[0055] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-source water system for desulfurization process water and demister flushing water, comprising a process water tank (1), at least two sets of process water systems connected to the process water tank (1), and at least two sets of demister flushing water systems, wherein the process water system comprises a process water pipe (4) connected to equipment (2) and a process water pump (5), and the demister flushing water system comprises a demister flushing water pipe (6) connected to an absorption tower (3) and a demister flushing water pump (7), characterized in that, A connecting pipe (8) is provided between the process water pipe (4) at the outlet section of the process water pump (5) and the demister flushing water pipe (6) at the outlet section of the demister flushing water pump (7). A first isolation valve (9) is provided on the connecting pipe (8). A recovery water pipe (10) is provided between the liquid outlet of the equipment (2) and the liquid outlet of the absorption tower (3). A clarification device (11), a clean water tank (12), and a return water pump (13) are sequentially provided on the recovery water pipe (10). The outlet of the return water pump (13) is connected to the inlet of the equipment (2) and the inlet of the absorption tower (3), respectively.

2. The dual-source water system for desulfurization process water and demister flushing water as described in claim 1, characterized in that: A second isolation valve (14) is installed on the process water pipe (4) at the outlet section of the process water pump (5) between the two adjacent process water systems; Between the two adjacent sets of demister flushing water systems, a third isolation valve (15) is installed on the demister flushing water pipe (6) at the outlet section of the demister flushing water pump (7).

3. The dual-source water system for desulfurization process water and demister flushing water as described in claim 1 or 2, characterized in that: The first isolation valve (9), the second isolation valve (14) and the third isolation valve (15) are manual valves.

4. The dual-source water system for desulfurization process water and demister flushing water as described in claim 1, characterized in that: In each process water system, a manual valve (16) is installed on the process water pipe (4) at the inlet of the process water pump (5), and an electric valve (17) is installed on the process water pipe (4) at the outlet of the process water pump (5); in each demister flushing water system, a manual valve (16) is installed on the demister flushing water pipe (6) at the inlet of the demister flushing water pump (7), and an electric valve (17) is installed on the demister flushing water pipe (6) at the outlet of the demister flushing water pump (7).

5. The dual-source water system for desulfurization process water and demister flushing water as described in claim 1, characterized in that: The liquid outlet of the device (2) and the liquid outlet of the absorption tower (3) are connected by a pipeline and a recovery water pipeline (10) is provided.

6. The dual-source water system for desulfurization process water and demister flushing water as described in claim 1, characterized in that: The liquid outlet of the device (2) and the liquid outlet of the absorption tower (3) are respectively provided with a recovery water pipe (10).

7. The dual-source water system for desulfurization process water and demister flushing water as described in claim 5 or 6, characterized in that: A manual valve (16) is installed at the inlet of the recycled water pipe (10), and an electric valve (17) is installed at the outlet of the recycled water pipe (10). The outlet of the manual valve (16) on the recycled water pipe (10) is connected to the inlet of the clarification device (11), the outlet of the clarification device (11) is connected to the inlet of the clean water tank (12), the outlet of the clean water tank (12) is connected to the inlet of the return water pump (13), and the outlet of the return water pump (13) is connected to the inlet of the equipment (2) and the inlet of the absorption tower (3) respectively through the electric valve (17).

8. The dual-source water system for desulfurization process water and demister flushing water as described in claim 1, characterized in that: The clarification device (11) is a filter device or a settling tank equipped with a cleaning agent.

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