Chemical cleaning device for ultrafiltration system

Abstract

The utility model relates to the technical field of chemical cleaning, in particular to an ultrafiltration system chemical cleaning device which comprises an alkali storage tank and an acid storage tank, the alkali storage tank conveys alkali liquor to an alkali solution box through an outlet main pipe and an alkali supply pump, and the acid storage tank conveys acid liquor to an acid solution box through an outlet main pipe and an acid supply pump. The alkali solution tank and the acid solution tank are separately connected with the ultrafiltration equipment through a chemical cleaning pipeline, a chemical cleaning inlet valve and a metering pump, and the ultrafiltration equipment forms a circulating cleaning pipeline through a connecting pipeline, a backwashing drain valve, a cleaning pump outlet valve, a circulating water return valve and a chemical cleaning water pump. According to the chemical cleaning device for the ultrafiltration system, the multiple pipelines are matched with one another, so that the chemical cleaning device for the ultrafiltration system has an acid washing process and an alkali washing process, the chemical cleaning efficiency is effectively improved, waste of liquid medicine is reduced, long-distance conveying of acid and alkali liquid medicine is achieved, the problem of complexity of manual dosing is solved, and the corrosion accident risk of manual dosing is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical cleaning, in particular to a chemical cleaning device for an ultrafiltration system. Background Art

[0002] During the long-term use of the ultrafiltration membrane components in the ultrafiltration system / equipment, the membrane surface will be covered by various harmful impurities it has intercepted to form a filter cake layer, and even the membrane pores will be blocked by smaller impurities, increasing the water's transmembrane pressure. The quality of raw water pretreatment can only solve the problem of how fast the membrane is polluted, but cannot fundamentally solve the pollution problem. Even if the pretreatment is thorough, the very few impurities in the water will gradually affect the separation performance of the membrane due to accumulation over time. At this time, flushing the membrane surface with pure water will no longer produce any cleaning effect, and only chemical agents can be used to chemically clean the ultrafiltration membrane components.

[0003] However, the ultrafiltration chemical cleaning equipment does not have supporting acid and alkali washing devices, and the acid and alkali need to be added to the ultrafiltration chemical cleaning equipment manually. The manual acid and alkali adding process requires wearing protective clothing and gas masks, which can easily cause acid and alkali corrosion accidents and pose a great safety risk. Summary of the invention

[0004] The main purpose of the utility model is to overcome the deficiencies in the prior art and provide a chemical cleaning device for an ultrafiltration system.

[0005] The technical solution adopted by the utility model to achieve its technical purpose is: an ultrafiltration system chemical cleaning device, comprising an alkali storage tank and an acid storage tank, wherein the alkali storage tank is fixedly connected with an outlet main pipe, and an alkali supply pump is fixedly installed in the pipeline of the outlet main pipe, and the alkali storage tank transports alkali solution to the alkali solution tank through the outlet main pipe and the alkali supply pump, and the acid storage tank is also fixedly connected with an outlet main pipe, and an acid supply pump is fixedly installed in the pipeline of the outlet main pipe, and the acid storage tank transports acid solution to the acid solution tank through the outlet main pipe and the acid supply pump;

[0006] The alkaline solution tank and the acid solution tank are individually connected to the ultrafiltration equipment through a chemical cleaning pipeline, a chemical cleaning inlet valve and a metering pump. The alkaline solution tank and the acid solution tank are independently connected to the ultrafiltration equipment through a chemical cleaning pipeline and an inlet valve in the chemical cleaning pipeline; at the same time, a metering pump is also provided in the pipeline to control the flow rate of the acid and alkali solutions.

[0007] The ultrafiltration device is fixedly connected with a connecting pipe, and a backwash drain valve, a chemical cleaning water pump, a cleaning pump outlet valve and a circulating return valve are fixedly installed in the pipeline of the connecting pipe in sequence. The ultrafiltration device forms a circulating cleaning pipeline through the connecting pipe, the backwash drain valve, the cleaning pump outlet valve, the circulating return valve and the chemical cleaning water pump;

[0008] The ultrafiltration device is fixedly connected to a cleaning pipeline, and a flushing water pump and a water inlet valve are fixedly installed in the pipeline of the cleaning pipeline. The ultrafiltration device forms a flushing pipeline through the cleaning pipeline, the flushing water pump and the water inlet valve;

[0009] The ultrafiltration device is also fixedly connected to a drainage pipe, and a drainage valve is fixedly installed in the pipeline of the drainage pipe. The ultrafiltration device also forms a drainage pipeline through the drainage pipe and the drainage valve;

[0010] The liquid discharge pipeline is fixedly connected to a sampling pipeline, and a sampling valve is fixedly installed in the pipeline of the sampling pipeline. The sampling pipeline is formed on the liquid discharge pipeline through the sampling pipeline and the sampling valve.

[0011] Preferably, the alkaline solution tank is fixedly connected with a liquid distribution pipeline and a liquid distribution valve, and the alkaline solution tank forms a liquid distribution pipeline through the liquid distribution pipeline and the liquid distribution valve.

[0012] Preferably, the acid solution tank and the alkaline solution tank are also fixedly connected with a clean water pipeline and a clean water valve, and the acid solution tank and the alkaline solution tank form a water distribution pipeline through the clean water pipeline and the clean water valve.

[0013] Preferably, the water outlet ends of the drainage pipe are fixedly connected to an acid wastewater tank, an alkali wastewater tank and a cleaning water wastewater tank respectively.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The chemical cleaning device of the ultrafiltration system has an acid cleaning process and an alkaline cleaning process through the mutual coordination of multiple pipelines composed of components such as an alkaline solution tank, an alkaline supply pump, an acid solution tank, and an acid supply pump, thereby effectively improving the chemical cleaning efficiency, reducing the waste of liquid medicine, realizing the long-distance transportation of acid and alkali liquid medicine, and also solving the tediousness of manual dosing and avoiding the risk of corrosion accidents caused by manual dosing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of the connection relationship of the components of the chemical cleaning device of the ultrafiltration system.

[0017] Figure 2 This is the cleaning flow chart of the chemical cleaning device for the ultrafiltration system.

[0018] in:

[0019] 1-Alkali storage tank; 101-Alkali supply pump; 102-Alkali solution tank; 2-Acid storage tank; 201-Acid supply pump; 202-Acid solution tank; 3-Ultrafiltration equipment; 4-Chemical cleaning water pump; 401-Backwash drain valve; 402-Cleaning pump outlet valve; 403-Circulation return valve; 5-Chemical cleaning inlet valve; 6-Flushing water pump; 601-Water inlet valve; 602-Drain valve; 7-Sampling valve. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the scope of the utility model. In addition, in the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.

[0021] In the description of the present utility model, it should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] In the description of the present utility model, it should be noted that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0023] In the description of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0024] like Figure 1-2As shown, the chemical cleaning device of the ultrafiltration system includes an alkali storage tank 1 and an acid storage tank 2. The alkali storage tank 1 is fixedly connected to an outlet main pipe, and an alkali supply pump 101 is fixedly installed in the pipeline of the outlet main pipe. The alkali storage tank 1 transports alkali solution to the alkali solution tank 102 through the outlet main pipe and the alkali supply pump 101. The acid storage tank 2 is also fixedly connected to an outlet main pipe, and an acid supply pump 201 is fixedly installed in the pipeline of the outlet main pipe. The acid storage tank 2 transports acid solution to the acid solution tank 202 through the outlet main pipe and the acid supply pump 201.

[0025] The alkali solution tank 102 is fixedly connected with a liquid dispensing pipeline and a liquid dispensing valve. The alkali solution tank 102 forms a liquid dispensing pipeline through the liquid dispensing pipeline and the liquid dispensing valve. When the liquid dispensing valve is opened, other alkali solutions can be prepared through the liquid dispensing pipeline for mixing.

[0026] The acid solution tank 202 and the alkaline solution tank 102 are also fixedly connected with a clean water pipeline and a clean water valve, and the acid solution tank 202 and the alkaline solution tank 102 form a water distribution pipeline through the clean water pipeline and the clean water valve;

[0027] The alkaline solution tank 102 and the acid solution tank 202 are individually connected to the ultrafiltration device 3 through a chemical cleaning pipeline, a chemical cleaning inlet valve 5 and a metering pump. The alkaline solution tank 102 and the acid solution tank 202 are independently connected to the ultrafiltration device 3 through a chemical cleaning pipeline and an inlet valve 5 in the chemical cleaning pipeline. At the same time, a metering pump is also provided in the pipeline to control the flow rate of the acid and alkali solutions.

[0028] The ultrafiltration device 3 is fixedly connected with a connecting pipe, and a backwash drain valve 401, a chemical cleaning water pump 4, a cleaning pump outlet valve 402 and a circulating return valve 403 are fixedly installed in the pipeline of the connecting pipe in sequence. The ultrafiltration device 3 forms a circulating cleaning pipeline through the connecting pipe, the backwash drain valve 401, the cleaning pump outlet valve 402, the circulating return valve 403 and the chemical cleaning water pump 4;

[0029] The ultrafiltration device 3 is fixedly connected with a cleaning pipeline, and a flushing water pump 6 and a water inlet valve 601 are fixedly installed in the pipeline of the cleaning pipeline. The ultrafiltration device 3 forms a flushing pipeline through the cleaning pipeline, the flushing water pump 6 and the water inlet valve 601;

[0030] The ultrafiltration device 3 is also fixedly connected to a drainage pipe, and a drainage valve 602 is fixedly installed in the drainage pipe. The ultrafiltration device 3 also forms a drainage pipeline through the drainage pipe and the drainage valve 602.

[0031] Furthermore, the liquid discharge pipe is fixedly connected to a sampling pipe, and a sampling valve 7 is fixedly installed in the pipe of the sampling pipe. The sampling pipe and the sampling valve 7 form a sampling pipe on the liquid discharge pipe.

[0032] Furthermore, the water outlet ends of the drainage pipe are fixedly connected to an acid wastewater tank, an alkali wastewater tank and a cleaning water wastewater tank respectively.

[0033] Specifically, when the ultrafiltration system chemical cleaning device is in use, the alkali storage tank 1 transports alkali solution to the alkali solution tank 102 through the outlet main pipe and the alkali supply pump 101, and the acid storage tank 2 transports acid solution to the acid solution tank 202 through the outlet main pipe and the acid supply pump 201.

[0034] The alkaline washing process is as follows:

[0035] Prepare about 800L of 0.5% sodium hydroxide and 30ppm sodium hypochlorite solution, stir evenly, pH=12, the liquid temperature should be 20℃-30℃;

[0036] Close the water inlet valve 601 and the drain valve 602, and open the chemical cleaning inlet valve 5 and the backwash drain valve 401;

[0037] Circulation cleaning: Start the chemical cleaning water pump 4, adjust the cleaning pump outlet valve 402 and the circulation return valve 403, control the cleaning flow rate to 8m3 / h, and circulate the cleaning for 1-4 hours;

[0038] Soaking: turn off the chemical cleaning water pump 4, the chemical cleaning inlet valve 5, and the backwash drain valve 401, and let it soak for 1-8 hours;

[0039] Recirculation: open the backwash drain valve 401, start the chemical cleaning water pump 4, and circulate for 0.5-1 hour;

[0040] Flushing: drain the cleaning liquid in the ultrafiltration device 3, close the chemical cleaning inlet valve 5, start the flushing water pump 6, open the water inlet valve 601 and the drain valve 602, and flush until the drainage pH does not change.

[0041] The pickling process is as follows:

[0042] Prepare about 800L of 2% hydrochloric acid solution, stir evenly, pH=2, the liquid temperature should be 20℃-30℃;

[0043] Close the water inlet valve 601 and the drain valve 602, and open the chemical cleaning inlet valve 5 and the backwash drain valve 401;

[0044] Circulation cleaning: Start the chemical cleaning water pump 4, adjust the cleaning pump outlet valve 402 and the circulation return valve 403, control the cleaning flow rate to 8m3 / h, and circulate the cleaning for 1-4 hours;

[0045] Soaking: turn off the chemical cleaning water pump 4, the chemical cleaning inlet valve 5, and the backwash drain valve 401, and let it soak for 1-8 hours;

[0046] Recirculation: open the backwash drain valve 401, start the chemical cleaning water pump 4, and circulate for 0.5-1 hour;

[0047] Flushing: drain the cleaning liquid in the ultrafiltration device 3, close the chemical cleaning inlet valve 5, start the flushing water pump 6, open the water inlet valve 601 and the drain valve 602, and flush until the pH of the drainage water does not change;

[0048] Start the ultrafiltration water pump in the ultrafiltration device 3, put the filter into operation, and rinse for 15-30 minutes;

[0049] Shut down the ultrafiltration water pump and filter, and restore the ultrafiltration equipment 3 to normal standby status.

[0050] It should be noted that although the above embodiments have been described in this article, this does not limit the scope of patent protection of the utility model. Therefore, based on the innovative concept of the utility model, changes and modifications to the embodiments described in this article, or equivalent structures, equivalent processes or equivalent functional transformations made using the contents of the utility model specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included in the scope of protection of the utility model patent.

Claims

1. An ultrafiltration system chemical cleaning device, comprising an alkali storage tank (1) and an acid storage tank (2), characterized in that: The alkali storage tank (1) transports alkali solution to the alkali solution tank (102) through the outlet main pipe and the alkali supply pump (101), and the acid storage tank (2) transports acid solution to the acid solution tank (202) through the outlet main pipe and the acid supply pump (201); The alkaline solution tank (102) and the acid solution tank (202) are each individually connected to the ultrafiltration device (3) via a chemical cleaning pipeline, a chemical cleaning inlet valve (5) and a metering pump; The ultrafiltration device (3) forms a circulating cleaning pipeline by connecting the pipeline, the backwash drainage valve (401), the cleaning pump outlet valve (402), the circulating return valve (403) and the chemical cleaning water pump (4); The ultrafiltration device (3) forms a flushing pipeline through a cleaning pipeline, a flushing water pump (6) and a water inlet valve (601); The ultrafiltration device (3) also forms a liquid discharge pipeline through a liquid discharge pipeline and a liquid discharge valve (602); A sampling pipeline is formed on the liquid discharge pipeline through a sampling pipeline and a sampling valve (7).

2. The ultrafiltration system chemical cleaning device according to claim 1, characterized in that: The alkaline solution tank (102) forms a liquid distribution pipeline through a liquid distribution pipeline and a liquid distribution valve.

3. The ultrafiltration system chemical cleaning device according to claim 2, characterized in that: The acid solution tank (202) and the alkaline solution tank (102) form a water distribution pipeline through a clean water pipeline and a clean water valve.

4. The ultrafiltration system chemical cleaning device according to claim 1, characterized in that: The water outlet ends of the drainage pipe are respectively fixedly connected to an acid wastewater tank, an alkali wastewater tank and a cleaning water wastewater tank.

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