Industrial circulating water analysis instrument sampling raw water pretreatment self-cleaning filtering device

Abstract

The utility model discloses a sampling raw water pretreatment self-cleaning filtering device for an industrial circulating water analysis instrument. The sampling raw water pretreatment self-cleaning filtering device comprises a circulating water system, a water inlet pipeline, an integrated filter, a filter water purification pipeline, an analysis instrument and a cleaning unit, the circulating water system is communicated with an inlet of the integrated filter through a water inlet pipeline, a water outlet in the top of the integrated filter is communicated with an inlet of the analysis instrument through a filter water purification pipeline, a water purification electric valve is arranged on the filter water purification pipeline, and the cleaning unit is communicated with the water outlet in the top of the integrated filter. The device prevents impurities in circulating water from contaminating and blocking an on-line analysis instrument sensor, and avoids manual sampling at the same time.

Description

Technical Field

[0001] The utility model belongs to the field of sampling raw water pretreatment of industrial circulating water quality analysis instruments, and relates to a self-cleaning filtering device for sampling raw water pretreatment of industrial circulating water analysis instruments. Background Art

[0002] The make-up water of the industrial circulating water in power plants is affected by various factors such as local water sources, water quality, and urban reclaimed water reuse. The water quality analysis is mostly manual analysis and detection. At the site equipped with on-line analysis instruments, since the sampling raw water is not effectively filtered and purified, the on-line analysis instruments are often unable to be continuously put into use due to the fouling of sensors by impurities in the water. Manual sampling and measurement also have a large lag, resulting in the inability to adjust the operating conditions of the circulating water in time. Therefore, the circulating water system is prone to corrosion, scaling, or microbial reproduction, and there is also a phenomenon of waste of chemicals and water resources. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art, and provides a self-cleaning filtering device for sampling raw water pretreatment of industrial circulating water analysis instruments, which avoids the fouling of on-line analysis instrument sensors by impurities in the circulating water and also avoids manual sampling.

[0004] To achieve the above purpose, the utility model discloses a self-cleaning filtering device for sampling raw water pretreatment of industrial circulating water analysis instruments, including a circulating water system, a water inlet pipe, an integrated filter, a filter clean water pipeline, an analysis instrument, and a cleaning unit;

[0005] The circulating water system is connected to the inlet of the integrated filter through the water inlet pipe. The water outlet at the top of the integrated filter is connected to the inlet of the analysis instrument through the filter clean water pipeline. A clean water electric valve is arranged on the filter clean water pipeline. The cleaning unit is connected to the water outlet at the top of the integrated filter.

[0006] Further, a sampling valve, a sampling self-priming pump, a check valve at the outlet of the self-priming pump, a water inlet electric valve, and a water inlet flow meter are sequentially arranged on the water inlet pipe along the water flow direction.

[0007] Further, a sewage outlet is arranged at the bottom of the integrated filter.

[0008] Further, a sewage solenoid valve is arranged at the sewage outlet at the bottom of the integrated filter.

[0009] Further, the cleaning unit includes a cleaning chemical reagent volumetric flask and an air booster pump. Among them, the outlet of the air booster pump and the outlet of the cleaning chemical reagent volumetric flask are connected to the water outlet at the top of the integrated filter.

[0010] Further, the outlet of the air booster pump is connected to the water outlet at the top of the integrated filter through a compressed air solenoid valve.

[0011] Further, an air filter is connected to the inlet of the air booster pump.

[0012] Further, the outlet of the cleaning agent volumetric flask is successively connected to the water outlet at the top of the integrated filter through a cleaning agent pump and a cleaning agent solenoid valve.

[0013] Further, a plurality of ceramic membrane filter elements are assembled inside the integrated filter, and the filter elements are acid and alkali resistant sintered types.

[0014] Further, an automatic control system is further included, and the automatic control system is connected to the purified water electric valve and the cleaning unit.

[0015] The utility model has the following beneficial effects:

[0016] When the industrial circulating water analysis instrument sampling raw water pretreatment self-cleaning filtering device of the utility model is in specific operation, the water sample output by the circulating water system is filtered by the integrated filter and then sent into the analysis instrument to avoid the impurities in the circulating water from fouling the on-line analysis instrument sensor, realizing automatic sampling. At the same time, the cleaning unit is used to clean the integrated filter, effectively ensuring the quality of the circulating water sampling raw water, ensuring the continuity and accuracy of the measurement of the circulating water on-line analysis instrument, facilitating popularization and application, and having extremely strong practicability. Description of the Drawings

[0017] The specification drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0018] Figure 1 The structural diagram of the present utility model.

[0019] Wherein, 1 is a sampling valve, 2 is a sampling self-priming pump, 3 is a check valve at the outlet of the self-priming pump, 4 is an inlet electric valve, 5 is an inlet flowmeter, 6 is a purified water electric valve, 7 is a sewage solenoid valve, 8 is a cleaning agent pump, 9 is a cleaning agent solenoid valve, 10 is an air filter, 11 is an air booster pump, 12 is a compressed air solenoid valve, 101 is an integrated filter, 102 is an analysis instrument, 103 is a cleaning agent volumetric flask, and 104 is an automatic control system. Detailed Embodiments

[0020] To enable those skilled in the art to better understand the solution of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of the embodiments, and are not intended to limit the scope of the present disclosure. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessarily confusing the concepts disclosed in the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present utility model.

[0021] Structural schematic diagrams according to the disclosed embodiments of the present utility model are shown in the accompanying drawings. These figures are not drawn to scale, and for the purpose of clear expression, some details are enlarged and some details may be omitted. The shapes of various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary. In practice, there may be deviations due to manufacturing tolerances or technical limitations, and those skilled in the art can design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0022] Referring to Figure 1 , the self-cleaning filtering device for pretreatment of the raw water sampled by the industrial circulating water analysis instrument according to the present utility model includes a circulating water raw water sampling unit, a filtering and purification unit, a cleaning unit, and an automatic control system 104;

[0023] The circulating water raw water sampling unit includes a sampling valve 1, a sampling self-priming pump 2, a check valve 3 at the outlet of the self-priming pump, an inlet electric valve 4, an inlet flow meter 5, and a sampling pipeline; the filtering and purification unit includes an integrated filter 101; the cleaning unit includes a cleaning chemical reagent volumetric flask 103, a cleaning chemical reagent pump 8, a cleaning chemical reagent solenoid valve 9, an air filter 10, an air booster pump 11, and a compressed air solenoid valve 12;

[0024] The circulating water system is connected to the inlet of the integrated filter 101 through an inlet pipeline. The sampling valve 1, the sampling self-priming pump 2, the check valve 3 at the outlet of the self-priming pump, the inlet electric valve 4, and the inlet flow meter 5 are sequentially arranged on the inlet pipeline along the water flow direction. A drain solenoid valve 7 is arranged at the drain port at the bottom of the integrated filter 101; the water outlet at the top of the integrated filter 101 is connected to the inlet of the analysis instrument 102 through a filter purified water pipeline, and a purified water electric valve 6 is arranged on the filter purified water pipeline. During operation, the water sample output by the circulating water system enters the integrated filter 101 through the inlet pipeline for filtration, and then enters the analysis instrument 102 through the filter purified water pipeline. Among them, the impurities filtered out by the integrated filter 101 are discharged through the drain port at the bottom of the integrated filter 101.

[0025] The outlet of the air filter 10 is successively connected to the water outlet at the top of the integrated filter 101 through the air booster pump 11 and the compressed air solenoid valve 12. The outlet of the cleaning agent capacity bottle 103 is successively connected to the water outlet at the top of the integrated filter 101 through the cleaning agent pump 8 and the cleaning agent solenoid valve 9. During operation, after the air is filtered by the air filter 10, it is compressed by the air booster pump 11 and then enters the integrated filter 101 through the compressed air solenoid valve 12 to perform backwashing on the integrated filter 101; the cleaning agent output by the cleaning agent capacity bottle 103 enters the integrated filter 101 through the cleaning agent pump 8 and the cleaning agent solenoid valve 9 to clean the integrated filter 101.

[0026] As an implementation manner of the present utility model, a plurality of ceramic membrane filter elements are assembled inside the integrated filter 101, and the filter elements are acid and alkali resistant sintered types.

[0027] As an implementation manner of the present utility model, the sewage outlet at the bottom of the integrated filter 101 is connected to the on-site drainage collection system.

[0028] As an implementation manner of the present utility model, an automatic control system 104 is further included, and the automatic control system 104 is connected to the sampling self-priming pump 2, the inlet water electric valve 4, the inlet water flowmeter 5, the purified water electric valve 6, the cleaning agent pump 8, the cleaning agent solenoid valve 9, the air booster pump 11, the compressed air solenoid valve 12 and the sewage solenoid valve 7.

[0029] Specifically, the automatic control system 104 includes a PLC controller and a touch screen. The PLC controller is connected to the touch screen, the sampling self-priming pump 2, the inlet water electric valve 4, the inlet water flowmeter 5, the purified water electric valve 6, the cleaning agent pump 8, the cleaning agent solenoid valve 9, the air booster pump 11, the compressed air solenoid valve 12 and the sewage solenoid valve 7. The PLC controller performs real-time data transmission with the sampling self-priming pump 2, the inlet water electric valve 4, the inlet water flowmeter 5, the purified water electric valve 6, the cleaning agent pump 8, the cleaning agent solenoid valve 9, the air booster pump 11, the compressed air solenoid valve 12 and the sewage solenoid valve 7, and performs man-machine interaction control through the touch screen. At the same time, the user can view the detection data and set the control parameters through the touch screen.

[0030] Embodiment 2

[0031] This embodiment is implemented based on the industrial circulating water analysis instrument sampling raw water pretreatment self-cleaning filtering device described in Embodiment 1, and includes the following steps:

[0032] 1) Raw water sampling operation of circulating water analysis instrument: Open sampling valve 1, then sequentially open inlet electric valve 4 and sewage solenoid valve 7. After a delay of t1, start the sampling self-priming pump 2. Monitor the instantaneous flow rate change of the inlet flowmeter 5. When the instantaneous flow rate of the inlet flowmeter 5 reaches Q1, the exhaust and sewage discharge of the integrated filter 101 are completed. After a delay of t2, open the purified water electric valve 6. After a 10-second delay, sequentially close the sewage solenoid valve 7, and the analysis instrument 102 is put into operation.

[0033] The housing of the integrated filter 101 is made of polished 304 stainless steel and is internally equipped with multiple ceramic membrane filter elements. The filtration accuracy of the ceramic membrane filter elements is 20μm. The raw water for circulating water sampling enters the inside of the ceramic membrane from the outside. Impurities with a particle size > 20μm are intercepted outside the filter element, and the impurities are adsorbed on the surface of the filter element. After accumulating to a certain thickness, they fall to the sewage outlet at the bottom. The 20μm ceramic membrane filter element can extend the operation time of the integrated filter 101 while effectively ensuring the quality of the sample water for the analysis instrument 102, which is economical and environmentally friendly.

[0034] 2) Online forward and reverse cleaning operations of the filter:

[0035] Judgment of the cleaning end point of the integrated filter 101:

[0036] 11) When the instantaneous flow rate is 60% of the effective filtration flow rate Q1;

[0037] 12) When the cumulative flow rate reaches ΣQ 定 When.

[0038] When the integrated filter 101 reaches the cleaning end point, the automatic control system 104 issues a cleaning instruction and proceeds according to the pre-set program:

[0039] 21) Stop the sampling self-priming pump 2, and sequentially close the inlet electric valve 4 and the purified water electric valve 6;

[0040] 22) Reverse air cleaning: Sequentially open the sewage solenoid valve 7 and the compressed air solenoid valve 12, start the air booster pump 11, and pulse purge the integrated filter 101 at intervals of 30s to purge and remove the large particle impurities adsorbed on the surface of the filter element;

[0041] 23) Reverse cleaning agent immersion cleaning: Close the sewage solenoid valve 7 and the compressed air solenoid valve 12; Open the cleaning agent solenoid valve 9, start the cleaning agent pump 8. After an immersion time of 60s, open the sewage solenoid valve 7 to chemically remove other impurities adsorbed on the surface of the filter element;

[0042] 24) Reverse air - cleaning agent combined cleaning: Pulse - control the switches of the air boosting pump 11, the cleaning agent pump 8 and the sewage solenoid valve 7. The air boosting pump 11 and the cleaning agent pump 8 are rotationally controlled at a set time interval to comprehensively purge the filter element.

[0043] 25) Forward raw water cleaning: Turn off the air boosting pump 11 and the compressed air solenoid valve 12; turn off the cleaning agent pump 8 and the cleaning agent solenoid valve 9; turn off the purified water electric valve 6; open the inlet water electric valve 4 and the sewage solenoid valve 7. After a delay of t1 time, start the sampling self - priming pump 2 and monitor the instantaneous flow rate change of the inlet water flowmeter 5. When the instantaneous flow rate reaches Q1, the entire on - line cleaning operation is completed.

[0044] Furthermore, after each cleaning of the integrated filter 101, the PLC control system automatically clears the cumulative flow rate and simultaneously starts the next cleaning cycle.

[0045] Furthermore, the concentration of the cleaning agent is determined according to the quality of the on - site circulating water, and the agent concentration remains consistent when the water source is stable.

[0046] It should be noted that the device described in the present utility model can effectively filter and purify the circulating water sample, avoid the situation that impurities in the circulating water block the on - line analysis instrument sensor, and at the same time can perform on - line automatic cleaning of the filter, improving the measurement reliability and accuracy of the on - line analysis instrument for circulating water.

[0047] Finally, it should be stated that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the specific implementation manners of the present utility model or make equivalent replacements. Any modification or equivalent replacement without departing from the spirit and scope of the present utility model shall be covered by the protection scope of the claims of the present utility model.

Claims

1. An industrial circulating water analysis instrument sampling raw water pretreatment self-cleaning filtration device, characterized in that It includes a circulating water system, a water inlet pipe, an integrated filter (101), a filter clean water pipeline, an analytical instrument (102) and a cleaning unit; The circulating water system is connected to the inlet of the integrated filter (101) through the water inlet pipe. The water outlet at the top of the integrated filter (101) is connected to the inlet of the analytical instrument (102) through the filter clean water pipeline. A clean water electric valve (6) is arranged on the filter clean water pipeline. The cleaning unit is connected to the water outlet at the top of the integrated filter (101); The cleaning unit includes a cleaning agent volumetric flask (103) and an air booster pump (11). Among them, the outlet of the air booster pump (11) and the outlet of the cleaning agent volumetric flask (103) are connected to the water outlet at the top of the integrated filter (101).

2. The raw water pretreatment self-cleaning filtering device for industrial circulating water analysis instrument sampling according to claim 1, characterized in that, A sampling valve (1), a sampling self-priming pump (2), a check valve at the outlet of the self-priming pump (3), an inlet electric valve (4) and an inlet flowmeter (5) are sequentially arranged on the water inlet pipe along the water flow direction.

3. The raw water pretreatment self-cleaning filtration device for the industrial circulating water analysis instrument sampling according to claim 1, characterized in that A sewage outlet is arranged at the bottom of the integrated filter (101).

4. The raw water pretreatment self-cleaning filtration device for industrial circulating water analysis instrument sampling according to claim 3, characterized in that, A sewage solenoid valve (7) is arranged at the sewage outlet at the bottom of the integrated filter (101).

5. The raw water pretreatment self-cleaning filtration device for industrial circulating water analysis instrument sampling according to claim 1, characterized in that The outlet of the air booster pump (11) is connected to the water outlet at the top of the integrated filter (101) through a compressed air solenoid valve (12).

6. The raw water pretreatment self-cleaning filtration device for industrial circulating water analysis instrument sampling according to claim 5, characterized in that, The inlet of the air booster pump (11) is connected to an air filter (10).

7. The self-cleaning filtration device for pretreatment of raw water sampled by the industrial circulating water analysis instrument according to claim 1, characterized in that, The outlet of the cleaning agent volumetric flask (103) is sequentially connected to the water outlet at the top of the integrated filter (101) through a cleaning agent pump (8) and a cleaning agent solenoid valve (9).

8. The raw water pretreatment self-cleaning filtering device for industrial circulating water analysis instrument sampling according to claim 1, characterized in that, Multiple ceramic membrane filter elements are assembled inside the integrated filter (101), and the filter elements are acid and alkali resistant sintered type.

9. The self-cleaning filtration device for pretreatment of raw water sampled by the industrial circulating water analysis instrument according to claim 1, wherein It also includes an automatic control system (104), and the automatic control system (104) is connected to the clean water electric valve (6) and the cleaning unit.

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