Multistage treatment formaldehyde production water treatment device

Abstract

The utility model belongs to the technical field of water treatment, and particularly relates to a multi-stage treatment formaldehyde production water treatment device, raw water in a raw water tank is purified through a first-stage filtering assembly and a second-stage filtering assembly, the first-stage filtering assembly realizes primary purification of the raw water through a filtering tank and a precision filter, the primarily purified water is matched with a scale inhibitor, and the scale inhibitor is added into the raw water tank. Water scale is cleaned, water is filtered through the RO membrane primary filter and stored in the primary pure water storage tank for being used by the secondary filter assembly, the secondary filter assembly continues to purify the purified pure water on the basis of the purified pure water, the pure water is continuously purified through the RO membrane secondary filter, the purified water subjected to multi-stage purification is stored in the secondary pure water storage tank, and the purified water subjected to multi-stage purification is stored in the secondary pure water storage tank. According to the invention, treatment of raw water is realized through multi-stage treatment, and continuous supply of formaldehyde production water is realized through backwashing, rapid flushing, multi-pipeline treatment and purified water storage.

Description

Technical Field

[0001] This application belongs to the field of water treatment technology, and in particular relates to a multi-stage formaldehyde production water treatment device. Background Technology

[0002] Formaldehyde production water is raw water that has been purified before it can be used. Impurities in the raw water must be removed before it can be used. Water treatment equipment needs to be shut down for maintenance due to the removal of impurities. However, formaldehyde production is a continuous process compared to water treatment equipment. If the water treatment equipment is shut down for maintenance, it will affect the formaldehyde production. Therefore, the water treatment equipment used for formaldehyde production must be able to obtain purified water that meets the standards and also be able to clean the water treatment equipment quickly to ensure its relatively continuous and stable operation. Utility Model Content

[0003] In order to solve the above problems, this application provides a multi-stage formaldehyde production water treatment device.

[0004] The purpose of this application is to provide a multi-stage formaldehyde production water treatment device that treats raw water through multi-stage treatment and ensures a continuous supply of formaldehyde production water through backwashing, rapid rinsing, multi-pipeline treatment, and purified water storage.

[0005] To achieve the purpose of this application, the technical solution of this application is as follows:

[0006] A multi-stage formaldehyde production water treatment device includes a primary filtration assembly and a secondary filtration assembly. The primary filtration assembly includes a raw water tank, which is connected to a filter tank. The filter tank is connected to a precision filter. The precision filter is connected to a primary booster pump. The primary booster pump is connected to an RO membrane primary filter. The RO membrane primary filter is connected to a primary pure water storage tank. The secondary filtration assembly includes a water supply pump, which is connected to the primary pure water storage tank. The water supply pump is connected to a secondary booster pump. The secondary booster pump is connected to an RO membrane secondary filter. The RO membrane secondary filter is connected to a secondary pure water storage tank.

[0007] Furthermore, the filter tank is connected to a backwash pump.

[0008] Furthermore, the filter tank is connected to a Roots blower.

[0009] Furthermore, a scale inhibitor feeding assembly is installed on the pipeline between the filter tank and the precision filter.

[0010] Furthermore, a first-stage fast-charging assembly is installed on the RO membrane primary filter.

[0011] Furthermore, the RO membrane secondary filter is equipped with a secondary fast-flow assembly.

[0012] Furthermore, the secondary filtration assembly includes at least two sets of RO membrane secondary filters arranged in parallel, each set of RO membrane secondary filters being paired with an independent secondary booster pump.

[0013] Furthermore, both the primary and secondary booster pumps are equipped with high-pressure protection devices and low-pressure protection devices. When the inlet water pressure is lower than the set value or the outlet water pressure is higher than the set value, the primary and secondary booster pumps will stop operating.

[0014] Furthermore, the scale inhibitor feeding assembly is configured to deliver scale inhibitor into the pipeline so that the conductivity of the water entering the primary pure water storage tank is not higher than 30 μS / cm.

[0015] Furthermore, an exhaust valve is installed on the filter tank.

[0016] Compared with the prior art, the beneficial effects of this application are as follows:

[0017] 1. This application purifies the raw water in the raw water tank through a primary filtration assembly and a secondary filtration assembly. The primary filtration assembly achieves preliminary purification of the raw water through a filter tank and a precision filter. The preliminarily purified water is then used with a scale inhibitor to remove scale. The water is then filtered through an RO membrane primary filter and stored in a primary pure water storage tank for use by the secondary filtration assembly. The secondary filtration assembly further purifies the purified water based on the already purified water. The purified water is further purified through an RO membrane secondary filter, resulting in multi-stage purified pure water stored in a secondary pure water storage tank.

[0018] 2. The raw water in this application is initially purified by a filter tank and a precision filter to filter out impurities in the raw water. This application uses a backwash pump and a Roots blower to backwash the impurities in the filter tank to ensure that the filter tank can operate stably during the initial purification process.

[0019] 3. This application uses a quick-rinse assembly to rapidly flush the RO membrane filter, ensuring its stable operation.

[0020] 4. The booster pump of this application has high and low pressure protection devices, which control the start and stop of the booster pump according to the inlet or outlet water pressure to ensure the normal operation of the booster pump. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0022] Figure 1 This is a schematic diagram of the overall structure of this application.

[0023] In the picture:

[0024] 1. Raw water tank; 2. Raw water pump; 3. Filter tank; 4. Scale inhibitor dosing assembly; 5. Precision filter; 6. Primary booster pump; 7. RO membrane primary filter; 8. Primary pure water storage tank; 9. Water supply pump; 10. pH adjustment assembly; 11. Secondary booster pump; 12. RO membrane secondary filter; 13. Secondary pure water storage tank; 14. Backwash pump; 15. Primary quick flush assembly; 16. Secondary quick flush assembly. Detailed Implementation

[0025] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] In this application, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the structural relationship between the various parts or elements of this application and do not specifically refer to any part or element in this application. They should not be construed as limiting this application.

[0028] Example 1

[0029] This embodiment is a multi-stage formaldehyde production water treatment device. This water treatment device purifies ordinary raw water into pure water that can be used in formaldehyde production, removes impurities from the raw water, and ensures a continuous supply of pure water. The continuous supply of pure water is mainly affected by the operation, shutdown and maintenance of the water treatment device. Formaldehyde production is more continuous than water treatment. Therefore, this embodiment needs to ensure the purification of raw water and reduce the impact of the water treatment device on the continuous supply of pure water.

[0030] It should be noted that the pure water referred to in this embodiment refers to water that can be used in formaldehyde production after purification or that can be used after further purification, and does not refer to any specific type of water. Raw water refers to unpurified water that is purchased directly, and does not refer to any specific type of water.

[0031] like Figure 1 As shown in the figure, this embodiment of a multi-stage formaldehyde production water treatment device includes a primary filtration assembly and a secondary filtration assembly. The multi-stage treatment referred to in this embodiment includes preliminary filtration, precision filtration, primary RO membrane filtration, secondary RO membrane filtration, and scale inhibitor addition.

[0032] The primary filtration assembly in this embodiment includes a raw water tank 1, a filter tank 3 connected to the raw water tank 1, a precision filter 5 connected to the filter tank 3, a primary booster pump 6 connected to the primary RO membrane filter 7, and a primary pure water storage tank 8 connected to the primary RO membrane filter 7.

[0033] Specifically, raw water tank 1 is connected to filter tank 3 via a pipeline. Raw water pump 2 is installed on this pipeline. Raw water pump 2 inputs raw water from raw water tank 1 into filter tank 3. Filter tank 3 is connected to precision filter 5 via a pipeline. Precision filter 5 is connected to primary booster pump 6 via a pipeline. Primary booster pump 6 is connected to RO membrane primary filter 7 via a pipeline. RO membrane primary filter 7 is connected to primary pure water storage tank 8 via a pipeline. Valves are installed on the pipeline. Raw water tank 1 and primary pure water storage tank 8 have large volumes, so metal tanks are used and located outside the water treatment workshop.

[0034] As the first device for preliminary purification, filter tank 3 needs to purify large particulate impurities in the raw water. In this embodiment, filter tank 3 is connected to backwash pump 14 and Roots blower. Filter tank 3 is equipped with an exhaust valve. During use, close the valves of the pipes entering and exiting filter tank 3, open the valve between backwash pump 14 and filter tank 3, and open the valve of the backwash outlet pipe on filter tank 3. Determine the backwash time according to the turbidity of the water flowing out of the backwash outlet pipe. During air washing, drain the water first, open the exhaust valve on filter tank 3, and open the air inlet valve installed on the pipe between Roots blower and filter tank 3. Start Roots blower to perform air washing. After air washing is completed, stop Roots blower and close the air inlet valve.

[0035] The precision filter 5 in this embodiment is equipped with filter elements. For example, the precision filter 5 in this embodiment has four 40-inch filter elements. A pressure gauge is installed on the outlet pipe of the precision filter 5. The filter elements of the precision filter 5 need to be replaced based on whether the pressure gauge reading is within the normal threshold.

[0036] A scale inhibitor dosing assembly 4 is installed on the pipeline between filter tank 3 and precision filter 5. The scale inhibitor dosing assembly 4 includes a delivery pump, which delivers the scale inhibitor into the pipeline between filter tank 3 and precision filter 5. In a specific implementation, the scale inhibitor dosing assembly 4 is configured to deliver the scale inhibitor into the pipeline so that the conductivity of the water entering the primary pure water storage tank 8 is not higher than 30 μS / cm, removing scale and impurities remaining inside the equipment, and the scale and impurities are blocked by the RO membrane primary filter 7.

[0037] The RO membrane primary filter 7 in this embodiment has a primary quick-rinse assembly 15. The quick-rinse assembly is used to input cleaning water into the RO membrane primary filter 7 to remove deposits on the concentrate side of the membrane element.

[0038] The secondary filtration assembly in this embodiment includes a water supply pump 9, a primary pure water storage tank 8 connected to the water supply pump 9, a secondary booster pump 11 connected to the secondary booster pump 11 connected to the RO membrane secondary filter 12, and the RO membrane secondary filter 12 connected to the secondary pure water storage tank 13.

[0039] Specifically, the primary pure water storage tank 8 is connected to the water supply pump 9 via a pipeline, the water supply pump 9 is connected to the secondary booster pump 11 via a pipeline, the secondary booster pump 11 is connected to the RO membrane secondary filter 12 via a pipeline, and the RO membrane secondary filter 12 is connected to the secondary pure water storage tank 13 via a pipeline. Valves are installed on the pipelines.

[0040] As a specific implementation scheme, the secondary filtration assembly of this embodiment includes at least two sets of RO membrane secondary filters 12 arranged in parallel. Each set of RO membrane secondary filters 12 is matched with an independent secondary booster pump 11. In this embodiment, the outlet pipe of the primary pure water storage tank 8 is installed with a branch pipe. For example, if two sets of RO membrane secondary filters 12 are arranged in parallel in this embodiment, then there is one branch pipe, so that the outlet pipe of the primary pure water storage tank 8 is divided into two parts.

[0041] As a specific implementation plan, a secondary quick-rinse assembly 16 is installed on the RO membrane secondary filter 12. The quick-rinse assembly is used to input cleaning water into the RO membrane secondary filter 12 to remove deposits on the concentrate side of the membrane element.

[0042] As a protective structure, this embodiment is equipped with high-pressure protection devices and low-pressure protection devices in both the primary booster pump 6 and the secondary booster pump 11. When the inlet water pressure is lower than the set value or the outlet water pressure is higher than the set value, the primary booster pump 6 and the secondary booster pump 11 stop running to prevent water with excessively high or low pressure from entering the RO membrane filter, thus ensuring the normal and stable operation of the RO membrane filter.

[0043] In this embodiment, a pH adjustment assembly 10 is installed on the pipeline between the water supply pump 9 and the secondary booster pump 11. The pH adjustment assembly 10 includes a delivery pump that introduces pH adjuster into the pipeline to protect the equipment from corrosion.

[0044] In this embodiment, there are at least two secondary pure water storage tanks 13, which are arranged side by side and connected to the outlet of the RO membrane secondary filter 12 through independent pipelines and valves. The outlets of the two sets of RO membrane secondary filters 12 used in this embodiment are connected together through pipelines. The outlets of the secondary pure water storage tanks 13 are respectively arranged with independent pipelines and valves. Different positions and numbers of secondary pure water storage tanks 13 can be opened according to water demand.

[0045] In this embodiment, the secondary pure water storage tank 13 is arranged inside the workshop.

[0046] In this embodiment, when encountering maintenance or other issues, since the primary pure water storage tank 8 contains primary purified pure water, the secondary filtration assembly purifies the water stored in the primary pure water storage tank 8 during maintenance of the primary filtration assembly, without affecting the use of the secondary filtration assembly. During maintenance of the secondary filtration assembly, since the secondary filtration assembly has at least two sets of RO membrane secondary filters 12, one set can be shut down and the other set can be used. This ensures that the shut-down set is under maintenance while the used set operates normally. After the maintenance of one set is completed, it is restarted normally, while the previously used set is shut down for maintenance. In addition, this embodiment has multiple secondary pure water storage tanks 13. Even if both sets of RO membrane secondary filters 12 undergo short-term maintenance, it will not affect the output of water used for formaldehyde from the secondary pure water storage tank 13.

[0047] It should be noted that when the secondary pure water storage tank 13 is transported to the formaldehyde production workshop, the pure water needs to pass through a deaerator.

[0048] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0049] While the specific embodiments of this application have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of this application. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of this application are still within the scope of protection of this application.

Claims

1. A multi-stage formaldehyde production water treatment device, characterized in that, Includes a primary filter assembly and a secondary filter assembly; The primary filtration assembly includes a raw water tank, a filter tank connected to the raw water tank, a precision filter connected to the filter tank, a primary booster pump connected to the primary RO membrane filter, and a primary pure water storage tank connected to the RO membrane filter. The secondary filtration assembly includes a water supply pump, a primary pure water storage tank connected to the water supply pump, a secondary booster pump connected to the secondary booster pump, an RO membrane secondary filter connected to the RO membrane secondary filter, and a secondary pure water storage tank connected to the RO membrane secondary filter.

2. The formaldehyde production water treatment device as described in claim 1, characterized in that: The filter tank is connected to a backwash pump.

3. The formaldehyde production water treatment device with multi-stage treatment as described in claim 2, characterized in that: The filter tank is connected to a Roots blower.

4. The multi-stage formaldehyde production water treatment device as described in claim 1, characterized in that: A scale inhibitor feeding assembly is installed on the pipeline between the filter tank and the precision filter.

5. The formaldehyde production water treatment device with multi-stage treatment as described in claim 1, characterized in that: The RO membrane primary filter is equipped with a primary fast-flow assembly.

6. The formaldehyde production water treatment device as described in claim 1, characterized in that: The RO membrane secondary filter is equipped with a secondary fast-flow assembly.

7. The formaldehyde production water treatment device as described in claim 1, characterized in that: The secondary filtration assembly includes at least two sets of RO membrane secondary filters arranged in parallel, each set of RO membrane secondary filters being paired with an independent secondary booster pump.

8. The formaldehyde production water treatment device as described in claim 1, characterized in that: Both the primary and secondary booster pumps are equipped with high-pressure protection devices and low-pressure protection devices. When the inlet water pressure is lower than the set value or the outlet water pressure is higher than the set value, the primary and secondary booster pumps will stop operating.

9. A multi-stage formaldehyde production water treatment device as described in claim 4, characterized in that: The scale inhibitor feeding assembly is configured to deliver scale inhibitor into the pipeline so that the conductivity of the water entering the primary pure water storage tank is not higher than 30 μS / cm.

10. A multi-stage formaldehyde production water treatment device as described in claim 1, characterized in that: The filter tank is equipped with an exhaust valve.

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