Neutralization treatment system for industrial wastewater

Abstract

The utility model provides a neutralization treatment system for industrial wastewater. The neutralization treatment system comprises a pretreatment system, a secondary neutralization system and an industrial controller, the pretreatment system comprises a plurality of neutralizing liquid treatment units arranged in parallel, each neutralizing liquid treatment unit comprises a liquid supply pipeline, the front end of each liquid supply pipeline is connected with a neutralizing liquid stock solution box, the rear end of each liquid supply pipeline is connected with a neutralizing pretreatment pool, and each liquid supply pipeline is provided with a bag cavity structure serving as a buffer cavity. The liquid supply pipeline is also connected in parallel with a return pipeline with a circulating pump on the outer sides of the buffer cavity and the water supply system; an overflow structure is arranged on the side, opposite to the liquid supply pipeline access side, of the neutralization liquid storage pool of each neutralization liquid treatment unit; sensor assemblies are arranged in the buffer cavity and the neutralization pretreatment tank; the liquid supply pipeline and the backflow pipeline are each provided with a variable frequency pump and an electromagnetic valve. The accuracy of the putting amount of the neutralizing water is improved, the full-automatic operation of adding the neutralizing water is realized, and the working intensity of operators is obviously reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a neutralization treatment system for industrial wastewater. Background Art

[0002] Industrial wastewater refers to wastewater and waste liquid generated in the industrial production process, which has various types and complex components.

[0003] According to the main components of pollutants in wastewater, industrial wastewater can be divided into acidic wastewater, alkaline wastewater, phenolic wastewater, chromium-containing wastewater, organic phosphorus wastewater and radioactive wastewater, etc. Among them, acidic wastewater mainly comes from industrial fields such as mine drainage, hydrometallurgy, electrolysis, acid production, etc. It is acidic as a whole and contains a large amount of heavy metal ions, which will cause serious pollution to the environment and damage the ecological environment.

[0004] At present, the treatment method for the above-mentioned acidic industrial wastewater in China is mainly neutralization, that is, the acidic wastewater and the neutralizer are mutually neutralized to generate neutral substances. The neutralizer that can be used can be limestone or calcium oxide, calcium hydroxide or alkaline wastewater. The main equipment adopts a lime milk secondary neutralizer equipped with a sedimentation tank, a limestone drum, a lime neutralization filter, etc. Most of the foreign acidic sewage treatment also adopts this type of technology, but the above-mentioned technical equipment is complex and numerous, covers a large area, has high infrastructure investment, complex operation and management, and a large amount of equipment maintenance. The equipment operation is difficult to control the sewage neutralization end point within the reasonable discharge range of pH 6-9, and the qualified rate of one-time treatment is only about 50%, which is easy to increase the cost of environmental governance. If pre-neutralization treatment can be carried out before calcium and sodium treatment, the above-mentioned problems can be effectively alleviated. However, in the prior art, when pre-neutralizing the above-mentioned acidic sewage, the placement of alkaline neutralizing agents depends entirely on the experience of the operator, which is very limited, and the entire pre-neutralization process is difficult to control, and the optimal pre-neutralization treatment effect cannot be obtained. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a system for neutralizing industrial wastewater. In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A neutralization treatment system for industrial wastewater, comprising a pretreatment system, a secondary neutralization system and an industrial controller for automatically controlling components in the pretreatment system;

[0007] The pretreatment system comprises a plurality of neutralization liquid processing units arranged in parallel, wherein the neutralization liquid processing units comprise a liquid supply pipeline, the front end of the liquid supply pipeline is connected to the neutralization liquid raw liquid tank, and the rear end of the liquid supply pipeline is connected to the neutralization pretreatment tank corresponding to the neutralization liquid processing unit one by one, a capsule cavity structure is arranged on the liquid supply pipeline as a buffer cavity, and a water supply system for diluting the neutralization liquid raw liquid is connected between the buffer cavity and the neutralization liquid raw liquid tank, and a reflux pipeline with a circulation pump is also connected in parallel on the outside of the buffer cavity and the water supply system;

[0008] The neutralization liquid storage tank of each neutralization liquid processing unit is provided with an overflow structure on the side opposite to the access side of the liquid supply pipeline, and is connected to the secondary neutralization system through the overflow structure;

[0009] The buffer cavity and the neutralization pretreatment tank are provided with a sensor component for collecting the state of the neutralization liquid in the buffer cavity and the neutralization pretreatment tank, the sensor component has a built-in encoding unit, and the sensor component is connected to the industrial controller through a data line;

[0010] The liquid supply pipeline and the return pipeline are both provided with a variable frequency pump and a solenoid valve, and the variable frequency pump and the solenoid valve are connected to the industrial controller via a data interface and are controlled by the industrial controller.

[0011] Furthermore, the buffer chamber is provided with an independent stirring device, a heat preservation device and an aeration device, and an overflow valve is provided on the connection part between the discharge side of the buffer chamber and the liquid supply pipeline.

[0012] Furthermore, the aeration device is arranged at the bottom of the buffer chamber, and the compressed reaction gas is introduced into the tank through an external gas supply device.

[0013] Furthermore, the industrial controller is externally connected to a data input module, and data modification operations are performed through the data input module; and the data input module is a touch handwriting screen or a keyboard and mouse kit or a handheld input device.

[0014] Furthermore, the sensor assembly includes at least a temperature sensor, a pH sensor, a liquid level sensor and a concentration sensor for measuring the concentration of the neutralization liquid stock solution installed in the neutralization pretreatment tank; the signal input end in the industrial controller is a multi-connector vector acquisition interface for receiving relevant information collected by the sensor assembly.

[0015] Furthermore, the industrial controller also includes a wireless communication module for facilitating data sharing.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The system is used for neutralization treatment of industrial wastewater. It has a compact structure and a high degree of integration. It can realize the automatic detection and adjustment of the allocation, supply and flow of neutralization water according to the relevant data information of the acidic wastewater to be treated and the preset value. It not only improves the accuracy of the neutralization water dosage, but also realizes the fully automated operation of neutralization water addition, which significantly reduces the workload of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0019] Figure 1 It is a schematic diagram of the frame structure of an embodiment of the utility model.

[0020] In the above drawings: 1. Neutralization liquid stock tank; 2. First neutralization liquid processing unit; 3. Second neutralization liquid processing unit; 4. Third neutralization liquid processing unit; 5. First neutralization pretreatment tank; 6. Second neutralization pretreatment tank; 7. Third neutralization pretreatment tank; 8. Industrial controller; 9. Secondary neutralization system; 10. Water supply system; 11. Buffer chamber; 12. Circulation pump; 13. Solenoid valve; 14. Variable frequency pump; 15. Sensor assembly; 16. Wireless communication module; 17. Remote communication equipment; 18. Touch panel. DETAILED DESCRIPTION

[0021] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In the following embodiments, those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as generally understood by those skilled in the art to which this application belongs.

[0024] See also Figure 1A neutralization treatment system for industrial wastewater is disclosed. In this embodiment, the neutralization treatment system for industrial wastewater is used to treat acidic wastewater discharged by electronic component processing enterprises, and the treatment method is acid neutralization treatment. The neutralization treatment system for industrial wastewater includes a pretreatment system, a secondary neutralization system 9, and an industrial controller 8 for automatically controlling components in the pretreatment system. In the above-mentioned neutralization treatment system for industrial wastewater, the pretreatment system is used to neutralize and pre-treat different types of acidic wastewater generated in different processes, and after treatment, they are concentrated and discharged into the secondary neutralization system 9 for combined treatment, and the secondary neutralization system 9 is used for secondary treatment and discharges or re-enters the industrial cycle after reaching the discharge conditions; and the secondary neutralization system 9 can be a neutralization treatment system for acidic wastewater treatment already available in the prior art, which can concentrate the wastewater under different process conditions and perform secondary neutralization treatment under the condition of neutralization pretreatment in the pretreatment system to further ensure the treatment efficiency and treatment effect of acidic wastewater.

[0025] More specifically, in this embodiment, the pretreatment system in the industrial wastewater neutralization treatment system includes three groups of neutralization liquid treatment units arranged in parallel, namely, the first neutralization liquid treatment unit 2, the second neutralization liquid treatment unit 3 and the third neutralization liquid treatment unit 4 shown in the figure, the first neutralization liquid treatment unit 2, the second neutralization liquid treatment unit 3 and the third neutralization liquid treatment unit 4 are connected at the front end through a pipeline to a neutralization liquid stock tank 1 as a neutralization liquid stock tank, and the neutralization liquid stock tank 1 stores the concentrated neutralization liquid stock. The liquid treatment unit 2, the second neutralization liquid treatment unit 3 and the third neutralization liquid treatment unit 4 are respectively connected to the first neutralization pretreatment tank 5, the second neutralization pretreatment tank 6 and the third neutralization pretreatment tank 7 at the rear as reaction units, that is, the acidic wastewater generated in the corresponding process is discharged into the corresponding neutralization pretreatment tank, and then the neutralization liquid prepared in the neutralization liquid treatment unit connected to the neutralization pretreatment tank is mixed and then neutralized in the neutralization pretreatment tank for pretreatment, and then discharged into the secondary neutralization system 9 for subsequent treatment after the neutralization pretreatment.

[0026] In this embodiment, the structure of each treatment unit composed of a single neutralization liquid treatment unit and a neutralization pretreatment tank connected by a pipeline is consistent, and the combination of the first neutralization liquid treatment unit 2 and the first neutralization pretreatment tank 5 in the figure is now described:

[0027] The first neutralization liquid treatment unit 2 is connected to a capsule structure as a buffer chamber 11 through a liquid supply pipeline. A water supply system 10 is provided at the front end of the buffer chamber 11 and is connected to the neutralization liquid tank 1. The water supply system 10 is connected to the municipal water pipeline through a tee on the liquid supply pipeline, and the municipal water is used as dilution water for diluting the neutralization liquid. In addition, the liquid supply pipeline is connected in parallel with a reflux pipeline with a circulation pump 12 on the outside of the corresponding buffer chamber 11 and the water supply system 10.

[0028] The discharge pipe of the first neutralization liquid treatment unit 2 is connected with a solenoid valve 13 and a variable frequency pump 14, and is assembled and connected with the first neutralization pretreatment tank 5 at the end of the discharge pipe. In addition, the first neutralization liquid treatment unit 2 is provided with an overflow structure with an overflow valve on the opposite side of the access end of the discharge pipe, and is connected to the secondary neutralization system 9 through the overflow structure.

[0029] In the above structure of this embodiment, in the working state, the dilution water entering the system is mixed with the neutralization liquid pumped out from the neutralization liquid tank 1 through the water supply system 10, and sent together to the buffer chamber 11 for mixing. During the mixing operation, the solenoid valve 13 needs to be closed, and then a circulation flow is formed between the water supply system 10, the buffer chamber 11, and the circulation pump 12 through the parallel pipeline, and a stable neutralization liquid is obtained through the buffer chamber 11 and temporarily stored in the buffer chamber 11, and then the solenoid valve 13 is opened when the corresponding first neutralization pretreatment tank 5 needs it, and it is pumped into the secondary neutralization system 9 through the variable frequency pump 14.

[0030] In order to ensure the mixing effect, in different embodiments, an independent stirring device, a heat preservation device and an aeration device can also be provided in the buffer chamber 11; the stirring device mainly adopts a frame-type agitator, the heat preservation device is used to be set according to the reaction conditions, and the aeration device is arranged at the bottom of the buffer chamber, and compressed reaction gas is introduced into the tank through an external gas supply device to assist the reaction, thereby improving the reaction rate and reaction effect.

[0031] In order to realize automatic control, the corresponding water supply system 10, buffer chamber 11, circulation pump 12, solenoid valve 13 and frequency conversion pump 14 are connected to the controller output end of the industrial controller 8 through the data communication interface, and the vector acquisition interface of the industrial controller 8 is connected to the sensor assembly 15 corresponding to the first neutralization pretreatment tank 1 through a data line. The sensor assembly 15 includes a temperature sensor, a pH sensor, a liquid level sensor and a concentration sensor for measuring the concentration of the neutralization liquid stock solution installed in the neutralization pretreatment tank. This temperature sensor, pH sensor, liquid level sensor and concentration sensor for measuring the concentration of the neutralization liquid stock solution all belong to the prior art. The industrial controller 8 uses the sensor data in the sensor assembly 15 as the conditional data for feedback control. At the same time, the sensor assembly 15 has a built-in encoding unit. The sensor assembly 15 can effectively improve the anti-interference performance of the sensor data by processing data in the encoding unit and then transmitting it.

[0032] Correspondingly, in the embodiment of the present invention, the internal structure and wiring method of the second neutralization liquid treatment unit 3, the second neutralization pretreatment tank 6 and the first neutralization liquid treatment unit 2 are the same, and the second neutralization liquid treatment unit 3 and the second neutralization pretreatment tank 6 as well as the third neutralization liquid treatment unit 4 and the third neutralization pretreatment tank 7 are also connected through similar pipelines with solenoid valves 13 and variable frequency pumps 14, and their control logic is similar to the above content.

[0033] In this embodiment, the industrial controller 8 is externally connected to a touch panel 18 as a data input module, which can be used to obtain the working status of the pre-processing system in the system, and can perform data modification operations by operating on the touch panel 18 to achieve the purpose of automatically controlling the components in the pre-processing system. In other embodiments, the data input module can also be replaced by a keyboard and mouse kit or a handheld input device. In addition, the industrial controller 8 also includes a wireless communication module 16 for facilitating data sharing. Through the wireless communication module 16, an external remote communication device 17 (such as a mobile phone) can be remotely connected to the industrial controller 8 through software, thereby realizing remote data acquisition and control of the industrial controller 8.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A system for neutralizing industrial wastewater, characterized in that: It includes a pretreatment system, a secondary neutralization system, and an industrial controller for automatically controlling components in the pretreatment system; The pretreatment system comprises a plurality of neutralization liquid processing units arranged in parallel, wherein the neutralization liquid processing units comprise a liquid supply pipeline, the front end of the liquid supply pipeline is connected to the neutralization liquid raw liquid tank, and the rear end of the liquid supply pipeline is connected to the neutralization pretreatment tank corresponding to the neutralization liquid processing unit one by one, a capsule cavity structure is arranged on the liquid supply pipeline as a buffer cavity, and a water supply system for diluting the neutralization liquid raw liquid is connected between the buffer cavity and the neutralization liquid raw liquid tank, and a reflux pipeline with a circulation pump is also connected in parallel on the outside of the buffer cavity and the water supply system; The neutralization liquid storage tank of each neutralization liquid processing unit is provided with an overflow structure on the side opposite to the access side of the liquid supply pipeline, and is connected to the secondary neutralization system through the overflow structure; The buffer cavity and the neutralization pretreatment tank are provided with a sensor component for collecting the state of the neutralization liquid in the buffer cavity and the neutralization pretreatment tank, the sensor component has a built-in encoding unit, and the sensor component is connected to the industrial controller through a data line; The liquid supply pipeline and the return pipeline are both provided with a variable frequency pump and a solenoid valve, and the variable frequency pump and the solenoid valve are connected to the industrial controller via a data interface and are controlled by the industrial controller.

2. A system for neutralizing industrial wastewater according to claim 1, characterized in that: The buffer chamber is provided with an independent stirring device, a heat preservation device and an aeration device, and an overflow valve is provided on the connection part between the discharge side of the buffer chamber and the liquid supply pipeline.

3. A system for treating industrial wastewater as claimed in claim 2, characterized in that: The aeration device is arranged at the bottom of the buffer chamber, and the compressed reaction gas is introduced into the tank through an external gas supply device.

4. A system for neutralizing industrial wastewater as claimed in claim 1, characterized in that: The industrial controller is externally connected to a data input module, and data modification operations are performed through the data input module; and the data input module is a touch handwriting screen or a keyboard and mouse kit or a handheld input device.

5. A system for neutralizing industrial wastewater as claimed in claim 1, characterized in that: The sensor assembly includes at least a temperature sensor, a pH sensor, a liquid level sensor and a concentration sensor for measuring the concentration of the neutralization liquid stock solution installed in the neutralization pretreatment tank; the signal input end in the industrial controller is a multi-connector vector acquisition interface for receiving relevant information collected by the sensor assembly.

6. A system for neutralizing industrial wastewater as claimed in claim 1, characterized in that: The industrial controller also includes a wireless communication module for facilitating data sharing.

Images