Filtering assembly and condensed water treatment system

Abstract

The utility model discloses a filtering assembly and a condensed water treatment system, the filtering assembly comprises a filter, a first water supply pipe, a second water supply pipe, a first water outlet pipe, a second water outlet pipe, a first branch pipe, a second branch pipe and an online turbidity detector, the first water supply pipe and the second water outlet pipe are both communicated with the first connector, the second water supply pipe and the first water outlet pipe are both communicated with the second connector, the online turbidity detector is provided with a liquid inlet and a liquid outlet, and the second water outlet pipe and the first water outlet pipe are communicated with the liquid inlet of the online turbidity detector through the first branch pipe and the second branch pipe respectively. A first valve is arranged on the first water supply pipe, a second valve is arranged on the second water outlet pipe, a third valve is arranged on the second water supply pipe, a fourth valve is arranged on the first water outlet pipe, a fifth valve is arranged on the first branch pipe, and a sixth valve is arranged on the second branch pipe. Therefore, the operation state of the filter assembly can be flexibly switched according to the detection result of the online turbidity detector.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment, and in particular relates to a filter assembly and a condensate water treatment system. Background Art

[0002] Since the condensate in the power plant contains suspended and colloidal metal corrosion products, these corrosion products will contaminate the ion exchange resin when entering the high-speed mixed bed for fine treatment, causing its working exchange capacity to decrease and the water production cycle to shorten. In addition, they will also adhere to the upper layer of the ion exchange resin (the part that first contacts the water flow), increasing the resistance of the mixed bed water production and affecting the economic efficiency of the unit operation. Therefore, before the condensate enters the high-speed mixed bed, these impurities that will affect the normal operation of the fine treatment must be filtered out. The pre-filter is a device widely used for condensate filtration. When the pre-filter is running, the condensate enters from the water inlet of the pre-filter, flows through the filter material and is discharged from the water outlet. After a period of operation, some impurities will remain on the filter material, hindering the filtration process. When the inlet and outlet pressure difference of the pre-filter reaches a certain set value, the pre-filter needs to be backwashed. If it is not backwashed in time, it will cause the filter material to be blocked and the pressure to be too high. The backwashing of the pre-filter is manually monitored, and the operator decides whether to backwash based on the changes in the inlet and outlet pressures. Human factors have a greater impact, especially when the filter element is damaged. The pressure difference rises slowly and the operating cycle of the pre-filter is extended, which eventually leads to a large amount of leakage of iron corrosion products and other particulate pollutants from the pre-filter. Utility Model Content

[0003] In order to solve the above technical problems, one of the purposes of the utility model is to provide a filter assembly with a simple structure and capable of online monitoring the turbidity of water after filtering the filter and flushing water after backwashing.

[0004] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a filter assembly, comprising a filter, a first water supply pipe, a second water supply pipe, a first water outlet pipe, a second water outlet pipe, a first branch pipe, a second branch pipe and an online turbidity detector, the filter having a first interface and a second interface, the first water supply pipe and the second water outlet pipe are both connected to the first interface, the second water supply pipe and the first water outlet pipe are both connected to the second interface, the online turbidity detector has a liquid inlet and a liquid outlet, one end of the first branch pipe is connected to the second water outlet pipe, one end of the second branch pipe is connected to the first water outlet pipe, the other ends of the first branch pipe and the second branch pipe are both connected to the liquid inlet of the online turbidity detector, a first valve is provided on the first water supply pipe, a second valve is provided on the second water outlet pipe, a third valve is provided on the second water supply pipe, a fourth valve is provided on the first water outlet pipe, a fifth valve is provided on the first branch pipe, and a sixth valve is provided on the second branch pipe.

[0005] The beneficial effect of the above technical solution is that: the condensed water can be filtered by the filter, wherein the first water supply pipe supplies condensed water to the filter, and the first water outlet pipe discharges the filtered condensed water, and the filtered condensed water can be filtered by the filter. In this way, when the filter is filtering, the second branch pipe takes water from the first water outlet pipe to the online turbidity detector to detect the turbidity of the filtered condensed water. If the turbidity of the filtered condensed water is high, the filter filtration is stopped, and flushing water is reversely introduced into the filter for backwashing, wherein the second water supply pipe supplies flushing water to the filter, and the second water outlet pipe discharges the flushing water after backwashing. At this time, the first branch pipe takes water from the second water outlet pipe to the online turbidity detector to detect the turbidity of the flushing water. If the turbidity of the flushing water is low, it means that the backwashing work is completed and the filter can continue to be used to filter the condensed water.

[0006] In the above technical solution, a backwash pump is provided on the second water supply pipe.

[0007] The beneficial effect of the above technical solution is that the backwashing water can be pressurized by the backwashing pump to increase the water pressure when the filter is backwashed, which can improve the backwashing effect.

[0008] The above technical solution also includes a controller, and the backwash pump and the online turbidity detector are both electrically connected to the controller.

[0009] The beneficial effect of the above technical solution is that: the controller can control the start and stop of the backwash pump and the water supply speed, and at the same time, the controller can obtain the detection data of the online turbidity detector in real time.

[0010] The above technical solution also includes a frequency regulator, and the frequency regulator is also arranged at the electrical connection between the controller and the backwash pump.

[0011] The beneficial effect of the above technical solution is that the controller can control the rotation speed of the backwash pump through the frequency regulator to adjust the supply pressure of the flushing water.

[0012] In the above technical solution, the first valve, the second valve, the third valve, the fourth valve, the fifth valve and the sixth valve are all electric valves, and are all electrically connected to the controller.

[0013] The beneficial effect of the above technical solution is that the entire filter assembly has a high degree of automation, and the first valve, the second valve, the third valve, the fourth valve, the fifth valve and the sixth valve can be automatically switched to on or off under the control of the controller.

[0014] In the above technical solution, a first flow meter is provided on the second water supply pipe, and the first flow meter is electrically connected to the controller.

[0015] The beneficial effect of the above technical solution is that the flow rate of flushing water on the second water supply pipe can be conveniently known through the first flow meter.

[0016] The above technical solution also includes a thermostat, which is arranged at the liquid inlet of the online turbidity detector, and the first branch pipe and the second branch pipe are both connected to the liquid inlet of the online turbidity detector through the thermostat, and the thermostat is electrically connected to the controller.

[0017] The beneficial effect of the above technical solution is that the temperature of the liquid at the liquid inlet of the online turbidity detector can be controlled by the thermostat to ensure that the detection accuracy of the online turbidity detector is not affected by the temperature.

[0018] The above technical solution also includes a second flow meter, which is arranged between the thermostat and the liquid inlet of the online turbidity detector, and the second flow meter is electrically connected to the controller.

[0019] The beneficial effect of the above technical solution is that the flow rate at the liquid inlet of the online turbidity detector can be measured by the second flow meter, so as to know whether the operation of the online turbidity detector is normal.

[0020] The second purpose of the utility model is to provide a condensate treatment system which has a simple structure and can be used in a thermal power plant to filter condensate and monitor the turbidity of water quality online.

[0021] In order to achieve the above-mentioned purpose, the technical solution of the utility model is as follows: a condensate water treatment system, comprising a fine treatment mixed bed and the filter assembly as described above, the first water outlet pipe is connected to the water inlet of the fine treatment mixed bed, the first water supply pipe is used to allow condensate water to pass through, the first water outlet pipe is used to discharge the filtered condensate water, the second water supply pipe is used to allow flushing water to pass through, and the second water outlet pipe is used to discharge the flushing water after backwashing.

[0022] The beneficial effect of the above technical solution is that the condensate can be filtered by the filter assembly, the filtered condensate is supplied to the fine treatment mixed bed, and when the filtering efficiency of the filter decreases significantly, it will be backwashed.

[0023] The above technical solution also includes a desalted water preparation device, and the water outlet of the desalted water preparation device is connected to the second water supply pipe.

[0024] The beneficial effect of the above technical solution is that the desalted water prepared by the desalted water preparation device can be used as flushing water, which can ensure that the filter remains salt-free after backwashing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1This is a simplified structural diagram of the filter assembly described in Example 1 of the utility model;

[0026] Figure 2 Another structural diagram of the filter assembly described in Example 1 of the utility model;

[0027] Figure 3 This is a schematic diagram of electrical connections of the controller in Embodiment 1 of the present utility model;

[0028] Figure 4 This is a simplified structural diagram of the condensate treatment system described in Example 2 of the utility model.

[0029] In the figure: 1 filter; 2 first water supply pipe; 3 second water supply pipe; 4 first water outlet pipe; 5 second water outlet pipe; 6 first branch pipe; 7 second branch pipe; 8 online turbidity detector; 9 first valve; 10 second valve; 11 third valve; 12 fourth valve; 13 fifth valve; 14 sixth valve; 15 backwash pump; 16 controller; 17 frequency regulator; 18 first flow meter; 19 thermostat; 20 second flow meter; 100 filter assembly; 200 fine treatment mixed bed; 300 deionized water preparation device. DETAILED DESCRIPTION

[0030] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0031] Example 1

[0032] like Figure 1As shown, this embodiment provides a filter assembly, including a filter 1, a first water supply pipe 2, a second water supply pipe 3, a first water outlet pipe 4, a second water outlet pipe 5, a first branch pipe 6, a second branch pipe 7 and an online turbidity detector 8, the filter 1 has a first interface and a second interface, the first water supply pipe 2 and the second water outlet pipe 5 are both connected to the first interface, the second water supply pipe 3 and the first water outlet pipe 4 are both connected to the second interface, the online turbidity detector 8 has a liquid inlet and a liquid outlet, one end of the first branch pipe 6 is connected to the second water outlet pipe 5, one end of the second branch pipe 7 is connected to the first water outlet pipe 4, the other ends of the first branch pipe 6 and the second branch pipe 7 are both connected to the liquid inlet of the online turbidity detector 8, the first water supply pipe 2 is provided with a first valve 9, the second water outlet pipe 5 is provided with a second valve 10, the second water supply pipe 3 is provided with a third valve 11, the first water outlet pipe 4 is provided with a fourth valve 12, and the first branch pipe 6 is provided with a fifth valve 13, and the second branch pipe 7 is provided with a sixth valve 14, so that the condensed water can be filtered by the filter, wherein the first water supply pipe supplies condensed water to the filter, and the first water outlet pipe discharges the filtered condensed water, and the filtered condensed water can be filtered by the filter, so that when the filter is filtering, the second branch pipe takes water from the first water outlet pipe to the online turbidity detector to detect the turbidity of the filtered condensed water, if the turbidity of the filtered condensed water is high, the filter filtration is stopped, and flushing water is reversely introduced into the filter for backwashing, wherein the second water supply pipe supplies flushing water to the filter, and the second water outlet pipe discharges the flushing water after backwashing, at this time, the first branch pipe takes water from the second water outlet pipe to the online turbidity detector to detect the turbidity of the flushing water, if the turbidity of the flushing water is low, it means that the backwashing work is completed, and the filter can continue to be used to filter the condensed water.

[0033] Figure 1 In the figure, a represents the first interface, b represents the second interface. When the filter is in the filtering state, the first interface is the water inlet and the second interface is the water outlet. When the filter is in the backwashing state, the first interface is the water outlet and the second interface is the water inlet.

[0034] In this embodiment, the first valve and the second valve cannot be opened at the same time. Similarly, the third valve and the fourth valve cannot be opened at the same time, and the fifth valve and the sixth valve cannot be opened at the same time.

[0035] When the first valve is opened, the fourth valve and the sixth valve are also opened (the second valve, the third valve and the fifth valve are in the closed state), and the entire filter assembly is now passing condensate and filtering the condensate, and the online turbidity detector detects the turbidity of the filtered condensate; and when the third valve is open, the second valve and the fifth valve are also in the open state (while the first valve, the fourth valve and the sixth valve are all in the closed state), and the filter assembly is in the backwash state.

[0036] The second water outlet pipe is used to directly discharge the flushing water after backwashing, while the liquid outlet of the online turbidity detector is used to discharge the condensed water and flushing water passed into it for turbidity testing.

[0037] like Figure 2 As shown, in the above technical solution, a backwashing pump 15 is arranged on the second water supply pipe 3, so that the backwashing pump can pressurize the flushing water to increase the water pressure when the filter is backwashed, which can improve the backwashing effect.

[0038] like Figure 3 As shown, the above technical solution also includes a controller 16, and the backwash pump 15 and the online turbidity detector 8 are electrically connected to the controller 16, so that the controller can control the start and stop of the backwash pump and the water supply speed, and at the same time, the controller can obtain the detection data of the online turbidity detector in real time.

[0039] like Figure 3 As shown, the above technical solution also includes a frequency regulator 17, and the frequency regulator 17 is also provided at the electrical connection between the controller 16 and the backwash pump 15, so that the controller can control the speed of the backwash pump through the frequency regulator to adjust the supply pressure of the flushing water (the frequency regulator is an existing product and will not be described in detail here).

[0040] like Figure 3 As shown, in the above technical solution, the first valve 9, the second valve 10, the third valve 11, the fourth valve 12, the fifth valve 13 and the sixth valve 14 are all electric valves, and are electrically connected to the controller 16, so that the degree of automation of the entire filter assembly is high, and the first valve 9, the second valve 10, the third valve 11, the fourth valve 12, the fifth valve 13 and the sixth valve 14 can be switched to on or off automatically under the control of the controller.

[0041] like Figure 2 and Figure 3As shown, in the above technical solution, a first flow meter 18 is provided on the second water supply pipe 3, and the first flow meter 18 is electrically connected to the controller 16, so that the flow rate of the flushing water on the second water supply pipe can be conveniently known through the first flow meter; the above technical solution also includes a thermostat 19, which is arranged at the liquid inlet of the online turbidity detector 8, and the first branch pipe 6 and the second branch pipe 7 are both connected to the liquid inlet of the online turbidity detector 8 through the thermostat 19, and the thermostat 19 is connected to the controller 1 6 is electrically connected, so that the temperature of the liquid at the liquid inlet of the online turbidity detector can be controlled by the thermostat to ensure that the detection accuracy of the online turbidity detector is not affected by the temperature; the above technical solution also includes a second flow meter 20, which is arranged between the thermostat 19 and the liquid inlet of the online turbidity detector 8, and the second flow meter 20 is electrically connected to the controller 16, so that the flow at the liquid inlet of the online turbidity detector can be measured by the second flow meter, so as to know whether the operation of the online turbidity detector is normal.

[0042] In this embodiment, a controller is added so that the entire filter assembly can switch between the filtering state and the backwashing state by itself. When in the filtering state, the controller controls the first valve, the fourth valve and the sixth valve to open, and the second valve, the third valve and the fifth valve to close, and the first water supply pipe is passed through the condensate water to be filtered. When the online turbidity detector detects that the turbidity of the filtered condensate water exceeds a preset first critical threshold (the first critical threshold of the turbidity of the condensate water can be set in the controller in advance. When the turbidity exceeds the first critical threshold, it indicates that the water quality of the filtered condensate water is poor and the filter needs to be backwashed), the controller controls the filter assembly to switch to backwashing. State, when backwashing is in progress, the controller controls the second valve, the third valve and the fifth valve to open, the first valve, the fourth valve and the sixth valve to close, and the backwashing pump is started. At this time, the second water supply pipe supplies flushing water, and when the online turbidity detector detects that the turbidity of the flushing water drops below the second critical threshold (the second critical threshold is also preset in the controller in advance. Since the flushing water continuously carries out the stains in the filter during backwashing, its turbidity gradually decreases. Therefore, when the turbidity of the flushing water drops below the second critical threshold, it can be considered that the filter has completed the backwashing task), the controller can control the filter assembly to switch to the filtering state. In this embodiment, the first critical threshold and the second critical threshold can be set according to the needs of the production process, which will not be repeated here. Of course, the first critical threshold can be set to 0.1NTU, and the second critical threshold can be set to 0.005NTU. In addition, the duration of each backwash of the filter assembly in this embodiment can also be set, and can be specifically set to 200 seconds for each backwash.

[0043] The controller described in this embodiment can adopt an existing industrial computer or ARM series single-chip microcomputer, and a control cabinet for accommodating the controller can be set next to the filter. The filter described in this embodiment is a pre-filter for condensate water filtration (it is an existing product and will not be described here).

[0044] The thermostat and online turbidity detector described in this embodiment belong to the prior art and are not described in detail here. The error value of the thermostat described in this embodiment can be ±1°C, and its constant temperature value during operation can be set to 25°C. At this time, it controls the water temperature at the liquid inlet of the online turbidity detector at a constant temperature value.

[0045] The liquid outlet of the online turbidity detector described in this embodiment can be connected to the wastewater tank. At this time, the online turbidity detector discharges the water sample detected by it into the wastewater tank for collection.

[0046] Example 2

[0047] The present embodiment provides a condensate treatment system, including a fine treatment mixed bed 200 and a filter assembly 100 as described in Example 1, wherein the first water outlet pipe 4 is connected to the water inlet of the fine treatment mixed bed 200, the first water supply pipe 2 is used to allow condensate to pass through, the first water outlet pipe 4 is used to discharge filtered condensate, the second water supply pipe 3 is used to allow flushing water to pass through, and the second water outlet pipe 5 is used to discharge flushing water after backwashing, so that the condensate can be filtered by the filter assembly, and the filtered condensate is supplied to the fine treatment mixed bed (which is an existing equipment of a thermal power plant and will not be described here), and the filter will be backwashed when the filtering efficiency of the filter drops significantly.

[0048] The above technical solution also includes a desalted water preparation device 300 (which belongs to the prior art and will not be described in detail here). The water outlet of the desalted water preparation device 300 is connected to the second water supply pipe 3, so that the desalted water prepared by the desalted water preparation device can be used as flushing water, thereby ensuring that the filter remains salt-free after backwashing.

[0049] The above description is only a preferred embodiment of the utility model and does not limit the utility model in any form. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A filter assembly, characterized in that: The invention comprises a filter (1), a first water supply pipe (2), a second water supply pipe (3), a first water outlet pipe (4), a second water outlet pipe (5), a first branch pipe (6), a second branch pipe (7) and an online turbidity detector (8), wherein the filter (1) has a first interface and a second interface, the first water supply pipe (2) and the second water outlet pipe (5) are both connected to the first interface, the second water supply pipe (3) and the first water outlet pipe (4) are both connected to the second interface, the online turbidity detector (8) has a liquid inlet and a liquid outlet, one end of the first branch pipe (6) is connected to the second water outlet pipe (5), and the One end of the second branch pipe (7) is connected to the first water outlet pipe (4); the other ends of the first branch pipe (6) and the second branch pipe (7) are both connected to the liquid inlet of the online turbidity detector (8); the first water supply pipe (2) is provided with a first valve (9); the second water outlet pipe (5) is provided with a second valve (10); the second water supply pipe (3) is provided with a third valve (11); the first water outlet pipe (4) is provided with a fourth valve (12); the first branch pipe (6) is provided with a fifth valve (13); and the second branch pipe (7) is provided with a sixth valve (14).

2. The filter assembly according to claim 1, characterized in that: The second water supply pipe (3) is provided with a backwash pump (15).

3. The filter assembly according to claim 2, characterized in that: It also includes a controller (16), and the backwash pump (15) and the online turbidity detector (8) are both electrically connected to the controller (16).

4. The filter assembly according to claim 3, characterized in that: It also includes a frequency regulator (17), and the frequency regulator (17) is also provided at the electrical connection between the controller (16) and the backwash pump (15).

5. The filter assembly according to claim 3, characterized in that: The first valve (9), the second valve (10), the third valve (11), the fourth valve (12), the fifth valve (13) and the sixth valve (14) are all electric valves and are electrically connected to the controller (16).

6. The filter assembly according to claim 3, characterized in that: The second water supply pipe (3) is provided with a first flow meter (18), and the first flow meter (18) is electrically connected to the controller (16).

7. The filter assembly according to claim 3, characterized in that: It also includes a thermostat (19), which is arranged at the liquid inlet of the online turbidity detector (8), and the first branch pipe (6) and the second branch pipe (7) are both connected to the liquid inlet of the online turbidity detector (8) through the thermostat (19), and the thermostat (19) is electrically connected to the controller (16).

8. The filter assembly according to claim 7, characterized in that: It also includes a second flow meter (20), which is arranged between the thermostat (19) and the liquid inlet of the online turbidity detector (8), and the second flow meter (20) is electrically connected to the controller (16).

9. A condensate treatment system, characterized in that: It comprises a fine treatment mixed bed (200) and a filter assembly (100) as described in any one of claims 1 to 8, wherein the first water outlet pipe (4) is connected to the water inlet of the fine treatment mixed bed (200), the first water supply pipe (2) is used to allow condensed water to flow in, the first water outlet pipe (4) is used to discharge the filtered condensed water, the second water supply pipe (3) is used to allow flushing water to flow in, and the second water outlet pipe (5) is used to discharge the flushing water after backwashing.

10. The condensate treatment system according to claim 9, characterized in that: It also includes a desalted water preparation device (300), wherein the water outlet of the desalted water preparation device (300) is connected to the second water supply pipe (3).

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