A water purifier production system and production method for dynamic circulation of production wastewater

Abstract

The present invention discloses a water purifier production system and method for dynamic circulation of production wastewater, including a reactor, a filtering device, an acid mist absorption tower, a circulation pool, an emergency water storage system and a control system. The present invention collects wastewater from different links of the production process by classification, and reuses wastewater in stages and by quality according to different processes. A water treatment system is added to the emergency water storage system, which can retain the effective components of the production wastewater, and the water quality meets the reuse requirements, avoiding the generation and discharge of a large amount of wastewater, and realizing clean production of the whole process; the present invention provides a two-stage regulating device including a circulation pool and an emergency water storage system, and adds a liquid level control system and a metering pump precise quantitative reuse system, which can ensure the water balance of the emergency water storage system and the smooth progress of the entire self-circulation process, has excellent operational flexibility, realizes precise quantification of the production reuse process, and makes the management and control of the production process more refined and intelligent.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater production scheduling and clean production, and specifically relates to a water purifier production system and a production method for dynamically circulating production wastewater. Background Art

[0002] The main raw materials for the production of water purifiers include industrial synthetic hydrochloric acid, industrial aluminum hydroxide, calcium aluminate powder, etc. During the entire life cycle of water purifier production, different forms of wastewater will be generated in different links of the loading and unloading, storage and transportation, and production process of raw and auxiliary materials and finished products. The water quality characteristics of this part of wastewater are as follows: high acidity, strong corrosiveness, and no other organic pollutants. If this part of wastewater is not collected, arbitrary discharge will cause pollution to the surrounding production and living functional areas.

[0003] In the prior art, the wastewater treatment method in the water purifier production process is mainly to collect and treat the wastewater in a centralized manner before discharging it. There is no selective reuse, treatment and circulation of the wastewater in each production link, resulting in a large amount of wastewater output and the entire production process is not clean. Summary of the invention

[0004] The purpose of the present invention is to provide a water purifier production system with dynamic circulation of production wastewater in response to the above-mentioned problems, which can achieve no production wastewater discharge during the water purifier production process and realize clean production throughout the entire process.

[0005] The technical contents of the present invention are as follows:

[0006] A water purifier production system for dynamically circulating production wastewater, comprising:

[0007] Reactor, used for raw material reaction to generate purifier;

[0008] A filtering device, used for filtering the water purifier product after the reaction in the reactor;

[0009] An acid mist absorption tower is used to absorb the acid mist during the loading and unloading process of the raw hydrochloric acid and the reaction process. The acid mist absorption tower is provided with a pipeline with a metering pump and is connected back to the reactor;

[0010] A circulation tank, used to receive the production wastewater from the reactor and the filtering device, wherein the circulation tank is provided with a pipeline with a metering pump and is connected back to the reactor;

[0011] The emergency water storage system includes a plurality of emergency water pools connected in series, wherein the emergency water storage system is provided with a water inlet pipe, a metering pump is provided on the water inlet pipe and connected with the circulation pool, and the water inlet pipe is also provided with a plurality of branch inlets to receive production wastewater from different production and auxiliary equipment, the emergency water storage system is provided with a water treatment device and a liquid level monitoring device, and the emergency water storage system is connected with the reactor through a metering pump;

[0012] The control system is used to receive the liquid level information of the liquid level monitoring device and control the metering pumps between the various devices in the water purification agent production system.

[0013] In a specific embodiment of the present invention, the acid mist absorption tower is further provided with a second outlet connected to a water inlet pipe of the emergency water storage system.

[0014] In a specific embodiment of the present invention, a branch pipeline is provided at the wastewater outlet of the reactor and is respectively connected to the water inlet pipeline of the flow pool and the emergency water storage system.

[0015] In a specific embodiment of the present invention, the water treatment device includes a sand screening screen and a scum filter, and the emergency water tanks are connected by an overflow pipe.

[0016] In a specific embodiment of the present invention, the liquid level monitoring device includes a liquid level gauge installed in the emergency water tank and a liquid level display integrated in the control system.

[0017] In a specific embodiment of the present invention, the emergency water storage system is underground.

[0018] In a specific embodiment of the present invention, the installation height of the circulation pool is lower than that of the reaction kettle and the filtering device.

[0019] The present invention also includes a method for producing a water purifier with dynamic circulation of production wastewater. The wastewater generated in the production of the water purifier is separated by quality using the aforementioned water purifier production system. Wastewater with low pollution content or with water purifier content reaching a set value is directly reused in stages and in a quantitative manner. The remaining wastewater is cached and treated and then recycled in stages and in a quantitative manner according to production conditions. No wastewater is discharged during the entire production process.

[0020] In a specific embodiment of the present invention, the following steps are included:

[0021] (1) The wastewater generated by the reactor and the filtration device is transported to the circulation pool, where it is collected and precipitated;

[0022] (2) The wastewater from the acid mist absorption tower is recycled to the reactor in stages and according to the reaction process of the reactor;

[0023] (3) monitoring the water quality and quantity of the wastewater in the circulation pool obtained in step (1), and quantitatively recycling the wastewater to the reactor or discharging it into the emergency water storage system according to the wastewater quality and quantity;

[0024] (4) The wastewater is filtered and treated through the emergency water storage system. The control system receives the liquid level signal of the emergency water storage system. The production personnel quantitatively transport and reuse the recycled water according to the production situation, the demand for recycled water and the collection situation of recycled water.

[0025] In a specific embodiment of the present invention, in step (3), the wastewater is recycled when the content of the finished water purifier in the wastewater of the circulation pool is monitored to be ≥ 3%.

[0026] The present invention realizes the reuse of wastewater from different processes in different stages according to their quality by adding a treatment link for wastewater from the intermediate production process, and also adds an automatic circulation process for liquid level control and precise quantitative reuse, so as to have the following technical effects: 1. Wastewater from different links of the production process is collected and classified, and is reused in stages according to wastewater from different processes, and a water treatment system is added, so that the effective components of the production wastewater can be retained, and the water quality meets the reuse requirements, thereby avoiding the generation and discharge of a large amount of wastewater and realizing clean production throughout the process; 2. A two-stage regulating device including a circulation pool and an emergency water storage system is provided, and a liquid level control system and a precise quantitative reuse system of a metering pump are added, which can ensure the water balance of the emergency water storage system and the smooth progress of the entire self-circulation process, have excellent operational flexibility, realize precise quantification of the production reuse process, and make the management and control of the production process more refined and intelligent. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Attached Figure 1 It is a schematic diagram of a water purifier production system of the present invention;

[0028] Description of the drawings: 1 is a reactor, 2 is a filtering device, 3 is an acid mist absorption tower, 4 is a circulation pool, 5 is an emergency water storage system, 6 is a control system, 7 is a delivery pump, and 8 is auxiliary equipment. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. All features disclosed in this specification, or steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can be combined in any way.

[0030] Example

[0031] like Figure 1As shown, a water purifier production system for dynamically circulating production wastewater includes a reactor 1, a filter device 2, an acid mist absorption tower 3, a circulation pool 4, an emergency water storage system 5 and a control system 6. The reactor 1 is used for raw material reaction to generate a purifier. The filter device 2 is used to filter the water purifier product after the reaction in the reactor 1; in this embodiment, the filter device 2 can be selected as a plate and frame filter press;

[0032] The acid mist absorption tower 3 is used to absorb the acid mist during the loading and unloading process of the raw hydrochloric acid and the reaction process. The acid mist absorption tower 3 is provided with a pipeline with a metering pump and is connected back to the reactor 1. On the one hand, the raw materials for the production of the water purifier include industrial synthetic hydrochloric acid. In order to avoid a large amount of acid mist generated by the hydrochloric acid during the loading and unloading process, the acid mist absorption tower 3 is used to collect the acid mist generated during the loading and unloading process in an organized manner. The pH value of the wastewater after absorbing the acid mist is about 1. Since this part of the wastewater basically does not contain other substances except acid, it can be directly collected and reused; on the other hand, since the reaction temperature is between 90 and 110° C., a large amount of hydrochloric acid mist will be generated during the production process. This part of the acid mist is collected in an organized manner. The collected acid mist is condensed by a graphite condenser, and the acid mist that cannot be condensed is absorbed by a multi-stage acid mist absorption tower 3. The pH value of this part of the condensed wastewater and the acid mist absorption water is about 1, and the pollution content is also small, so it can be collected and directly reused.

[0033] The circulation pool 4 is used to receive the production wastewater of the reactor 1 and the filter device 2. It is preferably set in a production workshop near the water purifier. The circulation pool 4 is provided with a pipeline with a metering pump and is connected back to the reactor 1. The circulation pool 4 is mainly used to receive wastewater with a small amount of pollution or a high content of water purifier in the production workshop. On the one hand, during the production process of the water purifier, a part of the water purifier slurry will be precipitated at the bottom of the reactor 1 or the finished product pool, affecting the effective volume of the reactor 1 and the finished product pool. The reactor 1 and the finished product pool need to be cleaned at regular intervals. The pH value of the cleaning wastewater is low and contains the effective component of the water purifier polyaluminum chloride. It cannot be discharged directly and needs to be collected in the circulation pool 4. On the other hand, during the production process, the filter cloth and the pull plate of the filter device 2 after the filter press need to be rinsed. The pH value of this part of the rinsing wastewater is low and cannot be discharged directly. It contains effective components and can be collected in the circulation pool 4. As a primary control measure of the entire circulation system, the circulation pool 4 can directly reuse part of the wastewater according to the production situation and water volume, and serve as a supplement to the emergency water storage system 5, which is conducive to increasing the operational flexibility in the circulation process.

[0034] The emergency water storage system 5 includes several emergency water pools connected in series. The number and size of the emergency water pools can be determined according to the amount of the entire production wastewater, and it is necessary to ensure that the circulation needs can be met. The emergency water storage system 5 is provided with an inlet pipe, and a metering pump is provided on the inlet pipe to communicate with the circulation pool 4. The inlet pipe is also provided with several branch inlets to receive production wastewater from different production and auxiliary equipment 8. The wastewater entering the emergency water storage system 5 includes two types. One type of wastewater must be circulated and treated before it can be reused, and the other type is to schedule and adjust the wastewater that can be directly reused to avoid high water levels in individual equipment at certain times. The emergency water storage system 5 is provided with a water treatment device and a liquid level monitoring device. The water treatment device is used to purify the circulated wastewater to ensure that it meets the requirements for reuse. The liquid level monitoring device is used to monitor the water volume of the emergency water storage system 5, so that production personnel can carry out quantitative transportation and reuse according to the water storage situation. Specifically, the wastewater of the emergency water storage system 5 includes the wastewater in the circulation pool 4 that does not meet the direct reuse conditions and the cleaning wastewater in the hydrochloric acid storage tank of the auxiliary equipment 8. The emergency water storage system 5 is connected to the reactor 1 through a metering pump to quantitatively transport the purified wastewater.

[0035] The control system 6 is used to receive the liquid level information of the liquid level monitoring device and control the metering pumps between the various devices in the water purification agent production system. In this embodiment, the control system 6 can be selected as a host computer, which is connected to each liquid level monitoring device and each metering pump through a signal line, and can schedule the circulating water volume according to different production links.

[0036] In this embodiment, the acid mist absorption tower 3 is provided with a second outlet connected to the water inlet pipe of the emergency water storage system 5, and emergency dispatch is performed through the second outlet to avoid the liquid level in the acid mist absorption tower 3 being too high.

[0037] In this embodiment, a branch pipeline is set at the wastewater outlet of the reactor 1 to be connected to the water inlet pipes of the circulation pool 4 and the emergency water storage system 5 respectively. Similarly, under normal circumstances, the wastewater of the reactor 1 directly enters the circulation pool 4. When the water level in the circulation pool 4 is high, the wastewater of the reactor 1 is controlled to enter the emergency water storage system 5.

[0038] In this embodiment, the water treatment device includes a grit screen and a scum filter, and the emergency water tanks are connected by overflow pipes. A certain residence time should be ensured in the emergency water tank to treat the wastewater by grit settling. A scum filter is installed on the side of the emergency water tank, and the filtered wastewater enters the lower emergency water tank in series from the overflow pipe.

[0039] In this embodiment, the liquid level monitoring device includes a liquid level meter installed in the emergency water tank and a liquid level display integrated in the control system 6. In the control system 6, the liquid level in the emergency water tank can be directly observed according to the liquid level display, and the production personnel can quantitatively transport the recycled water through the control system 6.

[0040] Preferably, the emergency water storage system 5 is selected to be underground, so as not to occupy the above-ground space of the factory.

[0041] Preferably, the installation height of the circulation pool 4 is lower than that of the reaction kettle 1 and the filtering device 2. The reaction kettle 1 and the filtering device 2 can be directly transported to the circulation pool 4 by gravity.

[0042] The present embodiment also provides a method for producing a water purifier with dynamic circulation of production wastewater. The water purifier production system described in the present embodiment is used to separate the wastewater generated in the production of the water purifier. Wastewater with low pollution content or with water purifier content reaching a set value can be directly reused in stages and in a quantitative manner. The remaining wastewater can be cached and treated and then recycled in a quantitative manner in stages according to production conditions. No wastewater is discharged during the entire production process.

[0043] Specifically, the following steps are included:

[0044] (1) The wastewater generated by the reactor 1 and the filter device 2 is transported to the circulation pool 4, where it is collected and precipitated;

[0045] (2) The wastewater from the acid mist absorption tower 3 is recycled to the reactor 1 in stages and in different qualities according to the reaction process of the reactor 1. The wastewater from the acid mist absorption tower 3 has good water quality and can be directly recycled to the semi-finished product reaction process of the water purifier product, realizing the recycling in stages and in different qualities, realizing the value of the recycled water with the highest efficiency, and reducing the water treatment load in the emergency water pool;

[0046] (3) monitoring the water quality and water quantity of the wastewater in the circulation pool 4 obtained in step (1), and quantitatively recycling the wastewater to the reactor 1 or discharging it into the emergency water storage system 5 according to the water quality and water quantity of the wastewater; specifically, in step (3), when the content of the finished water purifier in the wastewater in the circulation pool 4 is monitored to be ≥3%, the wastewater is recycled, and if the condition is not met, the wastewater is discharged into the emergency water storage system 5;

[0047] (4) The wastewater is filtered and processed by the emergency water storage system 5, and the control system 6 receives the liquid level signal of the emergency water storage system 5. The production personnel quantitatively transport and reuse the recycled water according to the production situation, the demand for recycled water and the collection situation of recycled water.

[0048] This embodiment realizes the reuse of wastewater from different processes in different qualities and stages by adding a treatment link for wastewater from the intermediate production process, and also adds an automatic circulation process for liquid level control and precise quantitative reuse, so as to have the following technical effects: 1. Wastewater from different links of the production process is collected and classified, and reused in stages according to different processes, and a water treatment system is added, which can retain the effective components of the production wastewater, and the water quality meets the reuse requirements, avoiding the generation and discharge of a large amount of wastewater, and realizing clean production throughout the process; 2. A two-stage regulating device including a circulation pool 4 and an emergency water storage system 5 is provided, and a liquid level control system 6 and a metering pump precise quantitative reuse system are added, which can ensure the water balance of the emergency water storage system 5 and the smooth progress of the entire self-circulation process, have excellent operational flexibility, realize precise quantification of the production reuse process, and make the management and control of the production process more refined and intelligent.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for producing a water purifier with dynamic circulation of industrial wastewater, characterized in that: A water purifier production system using a dynamic circulation of production wastewater is used, the water purifier production system comprising a reaction kettle for reacting raw materials to generate a purifier; A filtering device, used for filtering the water purifier product after the reaction in the reactor; An acid mist absorption tower is used to absorb the acid mist during the loading and unloading process of the raw hydrochloric acid and the reaction process. The acid mist absorption tower is provided with a pipeline with a metering pump and is connected back to the reactor; the acid mist absorption tower is also provided with a second outlet connected to the water inlet pipeline of the emergency water storage system; A circulation tank, used to receive the production wastewater from the reactor and the filter device, wherein the circulation tank is provided with a pipeline with a metering pump and is connected back to the reactor; The emergency water storage system includes a plurality of emergency water pools connected in series, wherein the emergency water storage system is provided with a water inlet pipe, a metering pump is provided on the water inlet pipe and connected with the circulation pool, and the water inlet pipe is also provided with a plurality of branch inlets to receive production wastewater from different production and auxiliary equipment, the emergency water storage system is provided with a water treatment device and a liquid level monitoring device, and the emergency water storage system is connected with the reactor through a metering pump; The water treatment device includes a sand screen and a scum filter, and the emergency water tanks are connected by overflow pipes; the liquid level monitoring device includes a liquid level meter installed in the emergency water tank and a liquid level display integrated in the control system; the emergency water storage system is buried; the installation height of the circulation tank is lower than the reactor and the filtering device; the wastewater outlet of the reactor is provided with branch pipelines respectively connected to the water inlet pipes of the circulation tank and the emergency water storage system; A control system, used to receive the liquid level information of the liquid level monitoring device and control the metering pumps between the various devices in the water purification agent production system; The water purifier production method includes separating the wastewater generated in the production of the water purifier, directly and quantitatively reusing the wastewater with low pollution content or the content of the water purifier reaching the set value in stages, and cyclically and quantitatively reusing the remaining wastewater in stages according to the production situation after buffering and treatment, and the entire production process does not generate wastewater discharge; The specific steps include: (1) The wastewater generated by the reactor and the filtration device is transported to the circulation pool, where it is collected and precipitated; (2) The wastewater from the acid mist absorption tower is recycled to the reactor in stages and according to the reaction process of the reactor; (3) monitoring the water quality and quantity of the wastewater in the circulation pool obtained in step (1), and quantitatively recycling the wastewater to the reactor or discharging it into the emergency water storage system according to the wastewater quality and quantity; (4) The wastewater is filtered and treated through the emergency water storage system. The control system receives the liquid level signal of the emergency water storage system. The production personnel quantitatively transport and reuse the recycled water according to the production situation, the demand for recycled water and the collection situation of recycled water; In the step (3), when the content of the finished water purifier in the wastewater from the circulation pool is monitored to be ≥ 3%, the wastewater is reused.

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