Water-based paint wastewater pretreatment equipment

Abstract

The invention discloses water-based paint wastewater pretreatment equipment, and relates to the technical field of wastewater pretreatment. Comprising a sewage stirring quantitative conveying assembly, a static pipeline mixer and a stacked screw machine which are sequentially connected, and the static pipeline mixer is further connected with a decolorizing agent quantitative conveying assembly, a sodium hydroxide solution quantitative conveying assembly, a polyaluminum chloride solution quantitative conveying assembly and a polyacrylamide solution quantitative conveying assembly. The stacked screw machine is respectively connected with a sludge hazardous waste treatment device and a wastewater biochemical treatment system; the electric cabinet is electrically connected with the sewage stirring and quantitative conveying assembly, the stacked screw machine, the decolorizing agent quantitative conveying assembly, the sodium hydroxide solution quantitative conveying assembly, the polyaluminum chloride solution quantitative conveying assembly and the polyacrylamide solution quantitative conveying assembly respectively. The method has the effects of demulsification, decoloration and removal of organic and inorganic pigments, and the wastewater is pretreated to lay a foundation for subsequent biochemical treatment.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater pretreatment, and in particular to a water-based paint wastewater pretreatment device. Background Art

[0002] The characteristics of water-based paint wastewater are high chroma, high COD, and containing chemical organic matter such as emulsions. The pretreatment of water-based paint wastewater is an important part of the entire wastewater treatment process. The pretreatment of water-based paint wastewater mainly removes and separates water-based paint (emulsions, pigments) in the wastewater. There are two methods for treating water-based paint wastewater: traditional and modern. The traditional water-based paint wastewater treatment process is multi-stage flocculation and sedimentation followed by biological treatment. Through anaerobic, aerobic, and sedimentation, it can meet the discharge standards after treatment. The cost is high and the treatment process is complicated. The traditional treatment process has higher treatment costs.

[0003] Therefore, it is necessary to provide a water-based paint wastewater pretreatment equipment with simple treatment process and cost saving. Summary of the invention

[0004] The main purpose of the present invention is to provide a water-based paint wastewater pretreatment device to solve the problems existing in the prior art.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A water-based paint wastewater pretreatment device, comprising a sewage stirring quantitative delivery component, a static pipeline mixer and a screw stacking machine connected in sequence, wherein the static pipeline mixer is also respectively connected to a decolorant quantitative delivery component, a sodium hydroxide solution quantitative delivery component, a polyaluminium chloride solution quantitative delivery component and a polyacrylamide solution quantitative delivery component, and the screw stacking machine is respectively connected to a sludge hazardous waste disposal device and a wastewater biochemical treatment system;

[0007] It also includes an electric control box, which is electrically connected to the sewage stirring quantitative delivery component, the screw stacking machine, the decolorant quantitative delivery component, the sodium hydroxide solution quantitative delivery component, the polyaluminium chloride solution quantitative delivery component and the polyacrylamide solution quantitative delivery component.

[0008] Furthermore, the sewage stirring and quantitative conveying component includes a sewage stirring tank, a pump 1 and a flow sensor, and the sewage stirring tank is connected to the pump 1, the flow sensor and the static pipeline mixer in sequence.

[0009] Furthermore, the decolorant quantitative delivery component includes a decolorant tank, a second pump and a tubular rotor float flowmeter, and the decolorant tank is connected to the second pump, the tubular rotor float flowmeter and the static pipeline mixer in sequence.

[0010] Furthermore, the sodium hydroxide solution quantitative delivery component includes a sodium hydroxide solution tank, a pump three and a tubular rotor float flowmeter, and the sodium hydroxide solution tank is connected to the pump three, the tubular rotor float flowmeter and the static pipeline mixer in sequence.

[0011] Furthermore, the sodium hydroxide solution tank is filled with 10% sodium hydroxide solution.

[0012] Furthermore, the polyaluminium chloride solution quantitative delivery component comprises a polyaluminium chloride solution tank, a pump four and a tubular rotor float flowmeter, and the polyaluminium chloride solution tank is sequentially connected to the pump four, the tubular rotor float flowmeter and the static pipeline mixer.

[0013] Furthermore, the polyaluminium chloride solution tank contains 5% polyaluminium chloride solution.

[0014] Furthermore, the polyacrylamide solution quantitative delivery component includes a polyacrylamide solution tank, a pump five and a tubular rotor float flowmeter, and the polyacrylamide solution tank is connected to the pump five, the tubular rotor float flowmeter and the static pipeline mixer in sequence.

[0015] Furthermore, the polyacrylamide solution tank contains 3‰ polyacrylamide solution.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The device of the present invention is simple and convenient to operate, saves labor, mixes and homogenizes wastewater, and makes the water quality more stable.

[0018] The water-based paint wastewater pretreatment equipment transports water-based paint wastewater, decolorizer, demulsifier, coagulant, flocculant and other agents to the spiral press filter for treatment through a static pipeline mixer according to the designed flow rate, so that the soluble organic matter in the wastewater forms larger floc particles through coagulation and flocculation and separates them through the spiral press, effectively removing high-concentration organic matter, pigments, emulsions, sedimentation separation and suspended solids and other pollutants in the wastewater, pretreating the wastewater to make the water quality more stable, reducing the inhibition and toxicity of microorganisms in the subsequent biological treatment unit, ensuring the activity and treatment effect of microorganisms, creating stable water inlet conditions for subsequent biochemical treatment, and ensuring the stability and reliability of the treatment effect.

[0019] The composition of water-based paint wastewater is complex, and the quality of wastewater generated by different production processes and products varies greatly. Pretreatment equipment has strong adaptability and can flexibly adjust the treatment process and parameters according to the different characteristics of wastewater quality to ensure the treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of a water-based paint wastewater pretreatment device in the present invention. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0022] Example 1

[0023] Combination Figure 1 The present invention provides a water-based paint wastewater pretreatment device, comprising a sewage stirring quantitative delivery component, a static pipeline mixer and a screw stacking machine connected in sequence, wherein the static pipeline mixer is also respectively connected with a decolorant quantitative delivery component, a sodium hydroxide solution quantitative delivery component, a polyaluminium chloride solution quantitative delivery component and a polyacrylamide solution quantitative delivery component, and the screw stacking machine is respectively connected with a sludge hazardous waste disposal device and a wastewater biochemical treatment system;

[0024] It also includes an electric control box, which is electrically connected to the sewage stirring quantitative delivery component, the screw stacking machine, the decolorant quantitative delivery component, the sodium hydroxide solution quantitative delivery component, the polyaluminium chloride solution quantitative delivery component and the polyacrylamide solution quantitative delivery component.

[0025] The sewage stirring and quantitative conveying component includes a sewage stirring tank, a pump 1 and a flow sensor, and the sewage stirring tank is connected to the pump 1, the flow sensor and the static pipeline mixer in sequence.

[0026] The decolorant quantitative delivery assembly comprises a decolorant tank, a second pump and a tubular rotor float flowmeter, and the decolorant tank is sequentially connected to the second pump, the tubular rotor float flowmeter and the static pipeline mixer.

[0027] The sodium hydroxide solution quantitative delivery component comprises a sodium hydroxide solution tank, a pump three and a tubular rotor float flowmeter, wherein the sodium hydroxide solution tank is connected with the pump three, the tubular rotor float flowmeter and the static pipeline mixer in sequence; the sodium hydroxide solution tank contains 10% sodium hydroxide solution.

[0028] The polyaluminium chloride solution quantitative delivery component comprises a polyaluminium chloride solution tank, a pump four and a tubular rotor float flowmeter, wherein the polyaluminium chloride solution tank is sequentially connected with the pump four, the tubular rotor float flowmeter and the static pipeline mixer; the polyaluminium chloride solution tank contains a 5% polyaluminium chloride solution.

[0029] The polyacrylamide solution quantitative delivery component includes a polyacrylamide solution tank, a pump five and a tubular rotor float flowmeter. The polyacrylamide solution tank is connected to the pump five, the tubular rotor float flowmeter and the static pipeline mixer in sequence; the polyacrylamide solution tank contains 3‰ polyacrylamide solution.

[0030] When the present invention is in operation, the sewage stirring tank is used to stir the water-based paint wastewater to make it homogenous, the pump one is used as a sewage delivery pump to deliver the homogenized water-based paint wastewater to the screw stacking machine through the static pipeline mixer, the decolorant tank, the 10% sodium hydroxide solution tank, the 5% polyaluminium chloride tank, and the 3‰ polyacrylamide solution tank are used to store various agents, the pump two (decolorant delivery pump), the pump three (10% sodium hydroxide solution delivery pump), the pump four (5% polyaluminium chloride solution delivery pump), the pump five (3‰ polyacrylamide solution The delivery pump is used to transport the reagents through the static pipeline mixer to the screw stacking machine. The static pipeline mixer spirally mixes the homogenized water-based paint wastewater, decolorizer, 10% sodium hydroxide solution, 5% polyaluminum chloride solution, and 3‰ polyacrylamide solution. The screw stacking machine dehydrates and filters the flocculants in the homogenized water-based paint wastewater after mixing with various reagents. The electric control box is used to control the sewage stirring tank, each solution storage tank, each pump, flow sensor, tubular rotor float flowmeter and screw stacking machine, etc., to form the water-based paint wastewater pretreatment equipment of the present invention.

[0031] The invention has the effects of demulsification, decolorization, and removal of organic and inorganic pigments, and the wastewater lays a foundation for subsequent biochemical treatment through pretreatment.

[0032] The treatment process of the water-based paint wastewater pretreatment equipment disclosed in the present invention is as follows:

[0033] After the water-based paint wastewater is stirred and homogenized in the sewage mixing tank, the water-based paint wastewater enters the static pipeline mixer through the flow sensor from pump 1 (variable frequency sludge pump), and the flow signal is connected to the electric control box. Decolorizer, 10% sodium hydroxide solution, 5% polyaluminium chloride solution, and 3‰ polyacrylamide solution flow into the static pipeline mixer from each storage tank through the tubular rotor float flowmeter. The water-based paint wastewater and various reagents are mixed in the static pipeline mixer and then enter the spiral stacking machine. As the spiral shaft rotates, the sludge moves forward, and the water is gradually squeezed out to form a drier mud cake that is discharged from the mud outlet, while the filtered water is discharged from the other side of the filter, thereby achieving solid-liquid separation. The sludge enters the sludge hazardous waste treatment device as hazardous waste for disposal, and the filtered clean water enters the wastewater biochemical treatment system for further treatment. The flow of pump one is adjusted by the frequency converter according to the mud discharge speed of the screw stacker, and the dosing pumps of the decolorizer, 10% sodium hydroxide solution, 5% polyaluminium chloride solution and 3‰ polyacrylamide solution adjust the feeding rate according to the size of the alum flowers in the wastewater after dosing.

[0034] In this embodiment, the sewage mixing tank is equipped with a liquid level switch, a high liquid level alarm is triggered, and a low liquid level interlock pump 1 (variable frequency sludge pump) is shut down.

[0035] The flow sensor is connected to the electric control box. When the flow is 0, pump 1, each dosing pump and screw stacking machine will stop and alarm.

[0036] Each dosing tank is equipped with a liquid level switch. When the liquid level is low, pump 1, each dosing pump and screw stacking machine will stop and alarm.

[0037] When the screw stacking machine fails, pump 1, each dosing pump and the screw stacking machine will stop and alarm.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A water-based paint wastewater pretreatment equipment, characterized in that: It includes a sewage stirring quantitative delivery component, a static pipeline mixer and a screw stacking machine connected in sequence, wherein the static pipeline mixer is also respectively connected to a decolorant quantitative delivery component, a sodium hydroxide solution quantitative delivery component, a polyaluminium chloride solution quantitative delivery component and a polyacrylamide solution quantitative delivery component, and the screw stacking machine is respectively connected to a sludge hazardous waste disposal device and a wastewater biochemical treatment system; It also includes an electric control box, which is electrically connected to the sewage stirring quantitative delivery component, the screw stacking machine, the decolorant quantitative delivery component, the sodium hydroxide solution quantitative delivery component, the polyaluminium chloride solution quantitative delivery component and the polyacrylamide solution quantitative delivery component.

2. The water-based paint wastewater pretreatment equipment according to claim 1, characterized in that: The sewage stirring and quantitative conveying component includes a sewage stirring tank, a pump 1 and a flow sensor, and the sewage stirring tank is connected to the pump 1, the flow sensor and the static pipeline mixer in sequence.

3. The water-based paint wastewater pretreatment equipment according to claim 1, characterized in that: The decolorant quantitative delivery assembly comprises a decolorant tank, a second pump and a tubular rotor float flowmeter, and the decolorant tank is sequentially connected to the second pump, the tubular rotor float flowmeter and the static pipeline mixer.

4. The water-based paint wastewater pretreatment equipment according to claim 1, characterized in that: The sodium hydroxide solution quantitative delivery component comprises a sodium hydroxide solution tank, a pump three and a tubular rotor float flowmeter, and the sodium hydroxide solution tank is connected to the pump three, the tubular rotor float flowmeter and the static pipeline mixer in sequence.

5. The water-based paint wastewater pretreatment equipment according to claim 4, characterized in that: The sodium hydroxide solution tank is filled with 10% sodium hydroxide solution.

6. The water-based paint wastewater pretreatment equipment according to claim 1, characterized in that: The polyaluminium chloride solution quantitative delivery component comprises a polyaluminium chloride solution tank, a pump four and a tubular rotor float flowmeter, and the polyaluminium chloride solution tank is sequentially connected to the pump four, the tubular rotor float flowmeter and the static pipeline mixer.

7. The water-based paint wastewater pretreatment equipment according to claim 6, characterized in that: The polyaluminium chloride solution tank contains 5% polyaluminium chloride solution.

8. The water-based paint wastewater pretreatment equipment according to claim 1, characterized in that: The polyacrylamide solution quantitative delivery component comprises a polyacrylamide solution tank, a pump five and a tubular rotor float flowmeter, and the polyacrylamide solution tank is connected to the pump five, the tubular rotor float flowmeter and the static pipeline mixer in sequence.

9. The water-based paint wastewater pretreatment equipment according to claim 8, characterized in that: The polyacrylamide solution tank is filled with 3‰ polyacrylamide solution.

Images