Multi-stage recycling system for waste metal treatment wastewater

Abstract

The utility model provides a multi-stage recycling system for waste metal treatment wastewater. The multi-stage recycling system comprises a wastewater treatment module, a water quality detection device A, a valve A, an integrated pressure-bearing rapid water purifier, a water quality detection device B, a valve B, a water demand module A, a water demand module B and a central controller, the wastewater treatment module is used for collecting and primarily purifying wastewater, the purified water is subjected to water quality detection and then enters the water demand module A to be recycled, or the purified water enters the integrated pressure-bearing rapid water purifier to be secondarily purified, and the secondarily purified water is subjected to water quality detection and then enters the water demand module B to be recycled; the requirement of the water demanding module B on the water quality is higher than that of the water demanding module A, the secondarily purified water enters the water demanding module B to be recycled, and wastewater in the water demanding module A and the water demanding module B flows into the wastewater treatment module or the integrated pressure-bearing rapid water purifier again to be purified, so that recycling of purified water of different grades is realized, and the economic cost is effectively saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of scrap metal recycling, especially to a multistage recycling system for wastewater from scrap metal treatment. BACKGROUND

[0002] Scrap metal includes metal fragments and scraps discarded by metallurgical industry and metal processing industry, metal devices scrapped due to equipment renewal, metal packaging containers recycled from municipal waste and metal objects such as waste vehicles, etc. Scrap metal can be recycled and create new economic benefits after reprocessing. When treating scrap metal, the contaminants on the metal surface need to be treated first. The wastewater, waste gas and sludge generated during the treatment of the metal surface also need to be reprocessed, and byproducts can be obtained during the treatment process for reuse. Whether it is cleaning the contaminants on the metal surface or reusing the waste from the metal surface treatment, chemical reagents are needed in the process, and wastewater will be generated again. A large amount of water is also needed during the treatment process. The recovery and purification standards of water required in steps such as pickling and extraction are not the same, the recovery and purification standards of water required in different wastewater treatment steps are also not the same, and the wastewater treatment methods of different systems are different, so different recovery and treatment measures need to be taken for different wastewater. SUMMARY

[0003] The utility model discloses a recycling device for wastewater from scrap metal treatment to solve the problem of wastewater treatment and reuse of different types during the recycling and treatment of scrap metal.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A multistage recycling system for wastewater from scrap metal treatment, comprising a wastewater treatment module, a water quality detection device A, a valve A, an integrated pressure-bearing rapid water purifier, a water quality detection device B, a valve B, a water demand module A, a water demand module B, and a central controller.

[0006] The wastewater treatment module comprises a first purified water outlet, the wastewater treatment module is used to purify and treat wastewater and discharge it from the first purified water outlet, the water quality detection device A and the valve A are installed at the first purified water outlet, and the water quality detection device A and the valve A are connected with the central controller, the water quality detection device A is used to detect the water quality of the first purified water outlet and feed back to the central controller, and the central controller is used to send signals to the valve A and control the opening and closing and flow rate of the valve A; the number of water outlets of the valve A is at least two, a first water outlet of the valve A is connected to the water demand module A through a water pipe and supplies water to the water demand module A, and a second water outlet of the valve A is connected to the integrated pressure-bearing rapid water purifier through a water pipe, the integrated pressure-bearing rapid water purifier comprises a second purified water outlet, the integrated pressure-bearing rapid water purifier is used to purify and treat wastewater for the second time, the water quality detection device B and the valve B are installed at the second purified water outlet of the integrated pressure-bearing rapid water purifier, and the water quality detection device B and the valve B are connected with the central controller, the water quality detection device B is used to detect the water quality of the second purified water outlet and feed back to the central controller, and the central controller is used to send signals to the valve B and control the opening and closing and flow rate of the valve B; the water outlet of the valve B is connected to the water demand module B and supplies water to the water demand module B.

[0007] The water outlet of the water demand module A is connected to the water inlet of the wastewater treatment module, and the water outlet of the water demand module B is connected to the water inlet of the wastewater treatment module or the integrated pressure-bearing rapid water purifier.

[0008] Preferably, the water outlet of the water demand module B comprises a process wastewater outlet and a circulating water outlet, the process wastewater outlet is used to discharge process wastewater generated by the water demand module B, and the process wastewater outlet is connected to the water inlet of the wastewater treatment module; the circulating water outlet is used to discharge circulating cooling water generated by the water demand module B, and the circulating water outlet is connected to the water inlet of the integrated pressure-bearing rapid water purifier.

[0009] Preferably, the wastewater treatment module is a chemical purification treatment device adding purification reagents or a purification treatment device based on low-temperature mass transfer concentration technology.

[0010] Preferably, the central controller can send signals to the valve A to control the opening of the specified water outlet of the valve A and the flow rate of the water outlet when the central controller simultaneously receives the first purified water outlet water quality qualified signal sent by the water quality detection device A and the water demand signal of the valve A.

[0011] Preferably, the opening and flow rate of each water outlet of the valve A are controlled separately by the central controller.

[0012] Preferably, the central controller can send a signal to the valve B to control the valve B to open and control the flow of the water outlet only when the central controller receives the second purified water outlet water quality qualified signal sent by the water quality detection device B and the water demand signal of the valve B.

[0013] Preferably, the water demand module A and the water demand module B are both provided with sensors connected to the central controller, and the sensors of the water demand module A and / or the water demand module B can send water demand signals to the central controller when the water demand module A and / or the water demand module B needs water.

[0014] Preferably, the water demand signal of the valve A and the water demand signal of the valve B are manually inputted into the central controller by an operator.

[0015] Compared with the prior art, the wastewater generated in the waste metal recycling process can be purified twice to obtain two kinds of purified water with different purification standards, which can be inputted into water demand modules with different water quality requirements for targeted reuse. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 It is a simplified structure diagram of a multi-stage recycling system for waste metal treatment wastewater.

[0018] Figure 2 It is a structure block diagram of a multi-stage recycling system for waste metal treatment wastewater.

[0019] Among them, the wastewater treatment module 1, the first purified water outlet 11, the water quality detection device A 2, the valve A 3, the integrated pressure-bearing rapid water purifier 4, the second purified water outlet 41, the water quality detection device B 5, the valve B 6, the water demand module A 7, the water demand module B 8, the process wastewater outlet 81, and the circulating water outlet 82. DETAILED DESCRIPTION

[0020] In order to further understand the purpose, structure, characteristics and functions of the present application, the following detailed description is provided in conjunction with the embodiments.

[0021] In the description of the utility model, it is necessary to explain that the terms ''center'', ''upper'', ''lower'', ''left'', ''right'', ''vertical'', ''horizontal'', ''inner'', ''outer'' and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0022] Please refer to Figure 1 and Figure 2 A multi-stage recycling system for treating wastewater of waste metal, comprising a wastewater treatment module 1, a water quality detection device A2, a valve A3, an integrated pressure-bearing rapid water purifier 4, a water quality detection device B5, a valve B6, a water demand module A7, a water demand module B8, and a central controller.

[0023] The wastewater treatment module 1 comprises a first purified water outlet 11, the wastewater treatment module 1 is used to purify and treat wastewater and discharge it from the first purified water outlet 11, the water quality detection device A2 and the valve A3 are installed at the first purified water outlet 11, the water quality detection device A2 and the valve A3 are connected with the central controller, the water quality detection device A2 is used to detect the water quality of the first purified water outlet 11 and feed back to the central controller, the central controller is used to send signals to the valve A3 and control the opening and closing and flow rate of the valve A3; the number of water outlets of the valve A3 is at least two, the first water outlet of the valve A3 is connected to the water demand module A7 through a water pipe and supplies water to the water demand module A7, the second water outlet of the valve A3 is connected to the integrated pressure-bearing rapid water purifier 4 through a water pipe, the integrated pressure-bearing rapid water purifier 4 comprises a second purified water outlet 41, the integrated pressure-bearing rapid water purifier 4 is used to purify and treat wastewater for the second time, the second purified water outlet 41 of the integrated pressure-bearing rapid water purifier 4 is installed with the water quality detection device B5 and the valve B6, the water quality detection device B5 and the valve B6 are connected with the central controller, the water quality detection device B5 is used to detect the water quality of the second purified water outlet 41 and feed back to the central controller, the central controller is used to send signals to the valve B6 and control the opening and closing and flow rate of the valve B6; the water outlet of the valve B6 is connected to the water demand module B8 and supplies water to the water demand module B8. The water outlet of the water demand module A7 is connected to the water inlet of the wastewater treatment module 1, and the water outlet of the water demand module B8 is connected to the water inlet of the wastewater treatment module 1 or the integrated pressure-bearing rapid water purifier 4.

[0024] The multi-stage recycling system for waste metal treatment wastewater of the utility model in use, first collect the wastewater produced in each process of waste metal treatment into wastewater treatment module 1, wastewater treatment module 1 carries out purification treatment to the wastewater in it, can select the wastewater treatment method commonly used in the industry for wastewater containing different impurities, the clean water after wastewater purification flows out from the valve A3 of the first water outlet 11, one of the necessary conditions for the opening of the valve A3 is that the water of the first water outlet 11 needs to be detected by the water quality detection device A2 and confirmed to be qualified, which can be used for some specific waste metal treatment processes again. The water of the first water outlet 11 flows not only to the water demand module A7, but also to the integrated pressure-bearing rapid water purifier 4, which is realized by controlling the opening and closing and flow rate of the valve A3 through the central controller, the integrated pressure-bearing rapid water purifier 4 can carry out secondary purification treatment on the wastewater, and make the purified water flow out from the valve B6 of the first water outlet 11, one of the necessary conditions for the opening of the valve B6 is that the water of the second water outlet 41 needs to be detected by the water quality detection device B5 and confirmed to be qualified, the water of the second water outlet 41 has one more purification operation than the water of the first water outlet 11, and its water quality is higher than that of the first water outlet 11. The water of the first water outlet 11 flows into the water demand module B8, which can be some equipment with relatively high water quality requirements in non-metal treatment processes, and the purified water sent into the water demand module B8 includes two categories, one is process water, that is, the water required in the waste metal recycling process, such as the water required in steps such as pickling, washing, extraction and chemical mixing, the wastewater produced after the water in this step is used often contains some chemical agents in the treatment process, so that the process wastewater cannot be directly reused, therefore, these process wastewaters are collected into the wastewater treatment module 1 for reprocessing; the other is circulating water, such as circulating cooling water, which flows in the circulating cooling system and mainly plays a cooling role, and does not directly participate in waste metal treatment and chemical reaction, and can be recycled, therefore, the circulating water produced after the water in this step is used flows into the integrated pressure-bearing rapid water purifier 4, repeatedly purifies the circulating cooling water, inputs the circulating wastewater into the circulating cooling water system after flocculating the impurities in the circulating wastewater by flocculants, and ensures the flowability and cooling effect of the circulating cooling water.

[0025] In the above use process, the water quality detection device A2 and the water quality detection device B5 can select a commercially available water quality detector, the valve A3 can select a commercially available three-way valve, and the valve B6 can select a commercially available check valve. The water quality detector and the valve are both selected as intelligent models to facilitate electrical connection with the central controller, including various connection methods such as wired connection and wireless signal connection.

[0026] In some embodiments, the water outlet of the water demand module B8 includes a process wastewater outlet 81 and a circulating water outlet 82. The process wastewater outlet 81 is used to discharge the process wastewater generated by the water demand module B8, and is connected to the water inlet of the wastewater treatment module 1. The circulating water outlet 82 is used to discharge the circulating cooling water generated by the water demand module B8, and is connected to the water inlet of the integrated pressure-bearing rapid water purifier 4. The water demand module B8 is specifically some water demand equipment or system in the scrap metal treatment process, for example, in the scrap metal treatment process, steps such as pickling, washing, extraction, reagent mixing, and slurry require purified water. The wastewater of the second purified water outlet 41 is purified twice to meet the needs of the water demand module B8 and is input into the water demand module B8. The process wastewater generated after use is returned to the wastewater treatment module 1, and the circulating cooling water is returned to the integrated pressure-bearing rapid water purifier 4, so that different water qualities and different uses of wastewater are treated and recycled respectively.

[0027] In some embodiments, the wastewater treatment module 1 is a chemical purification treatment device that adds purification reagents, or a purification treatment device based on low-temperature mass transfer concentration technology. The purification reagent can be configured according to the impurities in the wastewater, which will not be described here; the purification treatment device based on low-temperature mass transfer concentration technology is to concentrate the wastewater, so that the water condensed by evaporation is reused as purified water, and the concentrated wastewater is collected for separate treatment.

[0028] In some embodiments, the central controller can only send a signal to the valve A3 to control the specified water outlet of the valve A3 to open and control the flow of the water outlet when the central controller simultaneously receives the first purified water outlet water quality qualified signal sent by the water quality detection device A2 and the water demand signal of the valve A3. This ensures that the water quality of the wastewater purified by the wastewater treatment module 1 meets the reuse standard, and prevents the wastewater with excessive impurity content from flowing into the water demand module A7, which pollutes the water demand module A7. Further, the opening and flow of each water outlet of the valve A3 are controlled separately by the central controller.

[0029] In some embodiments, the central controller can only send a signal to the valve B6 to control the valve B6 to open and control the flow of the water outlet when the central controller simultaneously receives the second purified water outlet 41 water quality qualified signal sent by the water quality detection device B5 and the water demand signal of the valve B6. This ensures that the water quality of the wastewater purified by the integrated pressure-bearing rapid water purifier 4 meets the reuse standard, and prevents the wastewater with excessive impurity content from flowing into the water demand module B8, which pollutes the water demand module B8.

[0030] In some embodiments, the water demand module A7 and the water demand module B8 are both installed with sensors, and the sensors are connected to the central controller, and when the sensors of the water demand module A7 and / or the water demand module B8 detect that the water demand module A7 and / or the water demand module B8 needs water, the corresponding water demand signal is sent to the central controller. The sensor can be selected according to the actual equipment installation situation and combined with the cost, such as a liquid level sensor, a flow sensor, etc., to monitor the liquid amount in the water demand module and calculate the water demand.

[0031] In some embodiments, the water demand signal of the valve A3 and the water demand signal of the valve B6 are both manually input into the central controller by an operator.

[0032] In summary, the multi-stage recycling system for wastewater generated by waste metal treatment can collect and reuse the wastewater generated by waste metal treatment. The wastewater treatment module collects and purifies the wastewater once. The purified water enters the water demand module A for reuse after water quality detection, or enters the integrated pressure quick water purifier for secondary purification. The secondary purified water enters the water demand module B for reuse after water quality detection. The water quality requirement of the water demand module B is higher than that of the water demand module A. The secondary purified water enters the water demand module B for reuse, so that the reuse of purified water of different grades is realized, and the economic cost is effectively saved.

[0033] The utility model has been described by the above related embodiments, however, the above embodiments are only examples for implementing the utility model. It must be pointed out that the disclosed embodiments do not limit the scope of the utility model. On the contrary, changes and decorations made without departing from the spirit and scope of the utility model are all within the scope of patent protection of the utility model.

Claims

1. A multi-stage recycling system for treating wastewater from scrap metal processing, characterized by: The system comprises a wastewater treatment module, a water quality detection device A, a valve A, an integrated pressure-bearing rapid water purifier, a water quality detection device B, a valve B, a water demand module A, a water demand module B, and a central controller. The wastewater treatment module is used to purify and treat wastewater and discharge it from a first purified water outlet, the first purified water outlet is provided with the water quality detection device A and the valve A, both of which are connected to the central controller, the water quality detection device A is used to detect the water quality of the first purified water outlet and feed back to the central controller, the central controller is used to send signals to the valve A and control the opening and closing and flow rate of the valve A; the valve A has at least two water outlets, a first water outlet of the valve A is connected to the water demand module A through a water pipe and supplies water to the water demand module A, a second water outlet of the valve A is connected to the integrated pressure-bearing rapid water purifier through a water pipe, the integrated pressure-bearing rapid water purifier comprises a second purified water outlet, the integrated pressure-bearing rapid water purifier is used to purify and treat wastewater for the second time, the second purified water outlet of the integrated pressure-bearing rapid water purifier is provided with the water quality detection device B and the valve B, both of which are connected to the central controller, the water quality detection device B is used to detect the water quality of the second purified water outlet and feed back to the central controller, the central controller is used to send signals to the valve B and control the opening and closing and flow rate of the valve B; the water outlet of the valve B is connected to the water demand module B and supplies water to the water demand module B. The water outlet of the water demand module A is connected to the water inlet of the wastewater treatment module, and the water outlet of the water demand module B is connected to the water inlet of the wastewater treatment module or the integrated pressure-bearing rapid water purifier.

2. The multi-stage recycling system for scrap metal processing wastewater as claimed in claim 1, wherein: The water outlet of the water demand module B comprises a process wastewater outlet and a circulating water outlet, the process wastewater outlet is used to discharge process wastewater generated by the water demand module B, and is connected to the water inlet of the wastewater treatment module; the circulating water outlet is used to discharge circulating cooling water generated by the water demand module B, and is connected to the water inlet of the integrated pressure-bearing rapid water purifier.

3. The multi-stage recycling system for scrap metal processing wastewater as claimed in claim 1, wherein: The wastewater treatment module is a chemical purification treatment device with added purification reagents or a purification treatment device based on low-temperature mass transfer concentration technology.

4. The multi-stage recycling system for scrap metal processing wastewater as claimed in claim 1, wherein: The central controller can send signals to the valve A to control the opening of the specified water outlet of the valve A and the flow rate of the water outlet when the central controller simultaneously receives the first purified water outlet water quality qualified signal sent by the water quality detection device A and the water demand signal of the valve A.

5. The multi-stage recycling system for scrap metal processing wastewater as claimed in claim 4, wherein: The opening and flow rate of each water outlet of the valve A are controlled by the central controller.

6. The multi-stage recycling system for scrap metal processing wastewater as claimed in claim 5, wherein: The central controller can send signals to the valve B to control the opening of the valve B and the flow rate of the water outlet when the central controller simultaneously receives the second purified water outlet water quality qualified signal sent by the water quality detection device B and the water demand signal of the valve B.

7. The multi-stage recycling system for scrap metal processing wastewater as claimed in claim 4 or 6, characterized in that: The water demand module A and the water demand module B are both provided with sensors, which are connected to the central controller, and when the sensors of the water demand module A and / or the water demand module B detect that the water demand module A and / or the water demand module B needs water, the corresponding water demand signal is sent to the central controller.

8. The multi-stage recycling system for scrap metal processing wastewater as claimed in claim 4 or 6, wherein: The water demand signal of the valve A and the water demand signal of the valve B are both manually inputted into the central controller by an operator.

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