Concrete admixture production sewage treatment system

Abstract

The utility model provides a concrete admixture production sewage treatment system which comprises sewage treatment equipment, a PLC (Programmable Logic Controller) and an oxygen storage tank, the sewage treatment equipment is arranged outside a concrete admixture processing plant, and a sealing cover is arranged at the top of the sewage treatment equipment; a plurality of reaction areas such as a grating tank, a regulating tank, a sludge tank, a clean water tank, an oxidation tank, a coagulation reaction tank, a coagulation sedimentation tank, a secondary reaction tank, a secondary sedimentation tank, an intermediate tank I and an intermediate tank II are arranged in the device. According to the system disclosed by the utility model, a partitioned module design is adopted, different module functions can be flexibly customized and designed according to different water qualities, the applicability of the system is improved, and sewage treatment equipment is simple in structure, small in occupied area and low in cost. The sewage treatment equipment with integrated design and the internal treatment units are mutually connected, so that the connection of pipelines is greatly reduced, communication can be realized only by punching holes in the inner wall, and the sewage treatment cost is greatly saved.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a sewage treatment system for concrete admixture production. Background Art

[0002] Concrete admixtures refer to substances added to improve and adjust the properties of concrete. The application of concrete admixtures in engineering projects has received more and more attention, and the addition of admixtures plays a certain role in improving the properties of concrete. Among them, water reducers are the most widely used admixtures in mixing plants, but the treatment of wastewater generated in the production process of water reducers has become a difficult problem. For example, the sewage generated in the production process of concrete admixtures polycarboxylic acid water reducers and accelerators comes from cooling wastewater, vacuum pump wastewater, spraying wastewater, equipment cleaning wastewater, laboratory cleaning wastewater, ground washing wastewater, initial rainwater, product packaging barrel cleaning wastewater, etc. There are many types of sewage, and the pollutants generated, such as COD, ammonia nitrogen, petroleum, fluoride, etc., are difficult to treat directly and are difficult to biodegrade. Summary of the invention

[0003] The purpose of the present invention is to provide a treatment system for treating wastewater produced by concrete admixture production, to provide a simple treatment process and equipment for treating wastewater produced by concrete admixture production, and to reduce the cost of equipment investment and manpower maintenance.

[0004] The present invention is achieved through the following technical solutions:

[0005] A wastewater treatment system for concrete admixture production, comprising wastewater treatment equipment, a PLC controller, and an oxygen storage tank;

[0006] The sewage treatment equipment is arranged outside the concrete admixture processing plant, and a sealing cover is arranged on the top of the sewage treatment equipment; the PLC controller is arranged in the control room;

[0007] One side of the sewage treatment equipment is provided with a grid tank, a regulating tank, a sludge tank and a clear water tank in sequence; the other side of the sewage treatment equipment is provided with an oxidation tank, a coagulation reaction tank, a coagulation sedimentation tank, a secondary reaction tank, a secondary sedimentation tank, an intermediate tank I and an intermediate tank II in sequence;

[0008] The grid tank, regulating tank, oxidation tank, coagulation reaction tank, coagulation sedimentation tank, secondary reaction tank, secondary sedimentation tank intermediate tank I, intermediate tank II, and clear water tank are connected in sequence; the coagulation sedimentation tank and secondary sedimentation tank are also connected to the sludge tank respectively;

[0009] The grille pool is provided with a grille net; the grille pool is provided with a sewage inlet connected to the outside of the sewage treatment equipment to receive sewage; the top of the grille pool is provided with a material outlet;

[0010] The oxidation pond is provided with a reagent delivery device I and a reagent delivery device II, and the reagent delivery device I and the reagent delivery device II are electrically connected to the PLC controller; the reagent delivery device I is provided with a hydrogen peroxide reagent, and the reagent delivery device II is provided with a ferrous sulfate reagent;

[0011] The coagulation reaction tank is provided with a reagent dosing device III; the reagent dosing device is electrically connected to the PLC controller, and lime or polyacrylamide reagent is placed inside;

[0012] The intermediate tank I is provided with an ozone generator, which is connected to an external oxygen storage tank through an air distribution pipeline; the solenoid valve provided on the oxygen storage tank is electrically connected to the PLC controller;

[0013] The ozone generators are several and connected in sequence and laid at the bottom of the intermediate pool I; the ozone generator is externally a stainless steel pipe, internally provided with a dielectric, and internally provided with a high-voltage electrode; a discharge gap is formed by hollowing between the high-voltage electrode and the dielectric, and between the dielectric and the inner wall of the stainless steel pipe; the high-voltage electrode and the dielectric are connected to the port of the gas distribution pipeline;

[0014] The intermediate tank II is provided with a multi-media filter;

[0015] The bottoms of the oxidation tank, coagulation sedimentation tank, secondary reaction tank, secondary sedimentation tank, intermediate tank I, intermediate tank II, sludge tank and clear water tank are all provided with sewage outlets connected to the outside of the sewage treatment equipment.

[0016] The workflow of the system of the present invention is as follows:

[0017] Before using this system, first install the sewage treatment equipment, PLC controller, and oxygen storage tank in a suitable location. The sewage treatment equipment is made of concrete structure or carbon steel anti-corrosion or stainless steel device, which can be buried underground or arranged on the ground. After installation, place hydrogen peroxide agent, ferrous sulfate agent and polyaluminum sulfate (or polyacrylamide) agent in agent delivery device I, agent delivery device II and agent delivery device III respectively, and cover the sewage treatment equipment tightly and seal it. Start sewage treatment, discharge sewage from the sewage inlet into the grille pool, the sewage after solid-liquid separation through the grille net flows into the regulating pool for buffering, the solid matter is salvaged and removed from the material outlet set at the top of the grille pool, and then the sewage flows from the regulating pool into the oxidation pool, and the reagent dosing device I and the reagent dosing device II are controlled by the PLC controller to release hydrogen peroxide and ferrous sulfate, and the organic pollutants in the sewage are degraded through the Fenton reaction; the sewage after the Fenton reaction flows into the coagulation reaction pool, and the reagent dosing device III is controlled by the PLC controller to release polyaluminum sulfate (or polyacrylamide) to mix with the sewage, and the sewage mixed with polyaluminum sulfate (or polyacrylamide) flows into the coagulation sedimentation tank for flocculation reaction to remove organic pollutants in the sewage. The colloidal particles are discharged into the sludge tank and compressed into mud cakes after dehydration. The sewage after flocculation continues to flow into the secondary reaction tank for secondary mixing with the precipitant (polyaluminum sulfate or polyacrylamide). The sewage after secondary mixing flows into the secondary sedimentation tank for secondary flocculation and sedimentation to remove the colloidal particles. The precipitated colloidal particles are discharged into the sludge tank. The sewage after secondary sedimentation continues to flow into the intermediate tank I, and the ozone generator is controlled by the PLC controller to produce ozone to oxidize the sewage and remove organic matter in the sewage. The oxidized sewage is discharged into the intermediate tank II, and can meet the discharge standards after filtration through a multi-media filter. The filtered sewage is discharged into the clear water tank, and finally the clear water is discharged through the sewage outlet at the bottom of the clear water tank.

[0018] The ozone generator of the present invention is composed of three layers, the outer layer is a stainless steel tube, the middle layer and the inner layer are special glass medium tubes for placing dielectrics and high-voltage electrodes, and the oxygen pipeline is directly connected to the gap between the dielectric and the high-voltage electrode to supply oxygen, and the high-voltage electrode ionizes the oxygen to generate ozone. The stainless steel tube does not need to be replaced during lifelong use, which reduces maintenance costs. All components are made of high-quality materials that are resistant to ozone corrosion. The dielectric uses advanced barrier double-sided discharge technology, which greatly increases the discharge area while reducing the product volume. The dielectric greatly improves the ozone generation efficiency, thereby reducing the volume and weight of the ozone generator by three quarters compared with similar products.

[0019] As a further improvement of the present invention, a plurality of oxidation tanks connected in sequence are provided in the oxidation pool.

[0020] Carrying out oxidation in different zones sequentially can increase the hydraulic retention time, thereby achieving more thorough oxidation and removal of organic matter in the sewage.

[0021] As a further improvement of the present invention, the coagulation reaction tank is provided with a plurality of reaction tanks connected in sequence.

[0022] As a further improvement of the present invention, the secondary reaction tank is provided with a plurality of flocculation tanks connected in sequence.

[0023] Carrying out flocculation and sedimentation in different areas in sequence can increase the hydraulic retention time, thereby achieving more thorough flocculation and removal of colloidal particles in sewage.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. The system structure of the present invention is simple, the equipment occupies a small area, the sewage treatment equipment can be buried or arranged above ground, and the integrated sewage treatment equipment and the interconnection between the internal treatment units greatly reduce the connection of pipes, and only holes need to be punched in the inner wall to connect, which greatly saves the sewage treatment cost.

[0026] 2. The sewage treatment equipment of the present invention adopts a partitioned module design, and can flexibly customize and design different module functions according to different water qualities, thereby improving the applicability of the system.

[0027] 3. The ozone generator of the present invention can efficiently generate ozone, has a strong effect on removing pollutants in sewage, reduces the amount of sludge generated, and thus reduces the cost of subsequent treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the planar layout structure of the sewage treatment equipment of the present invention.

[0029] Figure 2 It is a schematic structural diagram of the ozone generating device of the present invention.

[0030] Figure 3 It is a half-section view of the ozone generating device of the present invention.

[0031] Figure 4 The figure is a flowchart of the system of the present invention.

[0032] Figure markings: 1-grid tank, 2-regulating tank, 3-oxidation tank, 4-coagulation reaction tank, 5-coagulation sedimentation tank, 6-secondary reaction tank, 7-secondary sedimentation tank, 8-intermediate tank I, 9-intermediate tank II, 10-sludge tank, 11-clear water tank, 12-reaction tank, 13-flocculation tank, 14-grid net, 15-agent dosing device I, 16-agent dosing device II, 17-dielectric, 18-gas distribution pipeline, 19-high voltage electrode, 20-discharge gap, 21-stainless steel pipe, 22-control room, 23-PLC controller, 24-oxygen storage tank, 25-agent dosing device III, 26-ozone generator. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings. In the embodiments, unless otherwise specified, the technical means used are all conventional technical means in the art. Example

[0034] like Figure 1 A concrete admixture production wastewater treatment system shown includes wastewater treatment equipment, a PLC controller 23, and an oxygen storage tank 24;

[0035] The sewage treatment equipment is arranged outside the concrete admixture processing plant, and a sealing cover is arranged on the top of the sewage treatment equipment; the PLC controller 23 is arranged in the control room 22;

[0036] One side of the sewage treatment equipment is provided with a grid tank 1, a regulating tank 2, a sludge tank 10 and a clear water tank 11 in sequence; the other side of the sewage treatment equipment is provided with an oxidation tank 3, a coagulation reaction tank 4, a coagulation sedimentation tank 5, a secondary reaction tank 6, a secondary sedimentation tank 7, an intermediate tank I 8 and an intermediate tank II 9 in sequence;

[0037] The grid tank 1, regulating tank 2, oxidation tank 3, coagulation reaction tank 4, coagulation sedimentation tank 5, secondary reaction tank 6, secondary sedimentation tank 7, intermediate tank I 8, intermediate tank II 9, and clear water tank 11 are connected in sequence; the coagulation sedimentation tank 5 and secondary sedimentation tank 7 are also connected to the sludge tank 10 respectively;

[0038] The grille pool 1 is provided with a grille net 14; the grille pool 1 is provided with a sewage inlet connected to the outside of the sewage treatment equipment to receive sewage; the top of the grille pool 1 is provided with a material outlet;

[0039] The oxidation pool 3 is provided with a reagent delivery device I15 and a reagent delivery device II16, and the reagent delivery device I15 and the reagent delivery device II16 are electrically connected to the PLC controller 23; the reagent delivery device I15 contains hydrogen peroxide reagent, and the reagent delivery device II16 contains ferrous sulfate reagent;

[0040] The coagulation reaction tank 4 is provided with a reagent delivery device III 25; the reagent delivery device III 25 is electrically connected to the PLC controller 23, and polyaluminum sulfate or polyacrylamide reagent is placed inside;

[0041] The intermediate pool Ⅰ8 is provided with an ozone generator 26, which is connected to an external oxygen storage tank 24 through an air distribution pipe 18; a solenoid valve provided on the oxygen storage tank 24 is electrically connected to a PLC controller 23; the ozone generator 26 is a plurality of ozone generators 26 which are sequentially connected and laid at the bottom of the intermediate pool Ⅰ8; Figure 2 and Figure 3 As shown, the ozone generating device 26 is externally a stainless steel tube 21, and is internally provided with a dielectric 17, and a high-voltage electrode 19 is provided inside the dielectric 17; a discharge gap 20 is formed by hollow arrangement between the high-voltage electrode 19 and the dielectric 17, and between the dielectric 17 and the inner wall of the stainless steel tube 21; the high-voltage electrode 19 and the dielectric 17 are connected to the port of the gas distribution pipeline 18;

[0042] The intermediate tank II 9 is provided with a multi-media filter;

[0043] The bottoms of the oxidation tank 3, coagulation sedimentation tank 5, secondary reaction tank 6, secondary sedimentation tank 7, intermediate tank I 8, intermediate tank II 9, sludge tank 10 and clear water tank 11 are all provided with sewage outlets connected to the outside of the sewage treatment equipment.

[0044] The system workflow of this embodiment is as follows: Figure 4 As shown, the details are as follows:

[0045] Before using this system, first install the sewage treatment equipment, PLC controller 23, and oxygen storage tank 24 in a suitable position. The sewage treatment equipment is made of concrete structure or carbon steel anti-corrosion or stainless steel device, which can be buried underground or arranged on the ground. After installation, hydrogen peroxide agent, ferrous sulfate agent and polyaluminum sulfate (or polyacrylamide) agent are placed in the agent delivery device Ⅰ15, the agent delivery device Ⅱ16 and the agent delivery device Ⅲ25 respectively, and the sewage treatment equipment is covered and sealed. Sewage treatment begins, and the sewage is discharged from the sewage inlet into the grille pool 1. After solid-liquid separation through the grille net 14, the sewage flows into the regulating pool 2 for buffering. Solid matter is salvaged and removed from the material outlet set at the top of the grille pool 1. Then the sewage flows from the regulating pool 2 into the oxidation pool 3. The reagent dosing device I 15 and the reagent dosing device II 16 are controlled by the PLC controller 23 to release hydrogen peroxide reagent and ferrous sulfate reagent, and organic pollutants in the sewage are degraded through the Fenton reaction. The sewage after the Fenton reaction flows into the coagulation reaction pool 4, and the reagent dosing device III 25 is controlled by the PLC controller 23 to release polyaluminum sulfate (or polyacrylamide) reagent to mix with the sewage. The sewage mixed with the polyaluminum sulfate (or polyacrylamide) reagent flows into the coagulation sedimentation tank 5 for flocculation reaction and removal. The colloidal particles in the sewage are discharged into the sludge tank 10 and compressed into mud cakes after dehydration; the sewage after flocculation continues to flow into the secondary reaction tank 6 for secondary mixing with the precipitant (polyaluminum sulfate or polyacrylamide), and the sewage after secondary mixing flows into the secondary sedimentation tank 7 for secondary flocculation and sedimentation to remove the colloidal particles, and the precipitated colloidal particles are discharged into the sludge tank 10; the sewage after secondary sedimentation continues to flow into the intermediate tank I8, and the ozone generator 26 is controlled by the PLC controller 23 to produce ozone to oxidize the sewage and remove organic matter in the sewage. The oxidized sewage is discharged into the intermediate tank II9, and can meet the discharge standard after filtering through a multi-media filter. The filtered sewage is discharged into the clear water tank, and finally the clear water is discharged through the sewage outlet at the bottom of the clear water tank. Example

[0046] This embodiment is a further improvement made on the basis of Embodiment 1, and the details are as follows:

[0047] The oxidation pool 3 is provided with a plurality of oxidation tanks 27 which are connected in sequence.

[0048] The coagulation reaction pool 4 is provided with a plurality of reaction tanks 12 which are connected in sequence.

[0049] The secondary reaction tank 6 is provided with a plurality of flocculation tanks 13 which are connected in sequence.

[0050] The working process of this embodiment is the same as that of embodiment 1. The multiple oxidation tanks 27 can be set up to carry out oxidation in sequence in different regions, which can increase the hydraulic retention time, thereby achieving more thorough oxidation and removal of organic matter in sewage. The multiple reaction tanks 12 and flocculation tanks 13 can be set up to carry out flocculation and precipitation in sequence in different regions, which can increase the hydraulic retention time, thereby achieving more thorough flocculation and removal of colloidal particles in sewage.

[0051] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A concrete admixture production wastewater treatment system, characterized by: It includes sewage treatment equipment, a PLC controller (23), and an oxygen storage tank (24); The sewage treatment equipment is arranged outside the concrete admixture processing plant, and a sealing cover is arranged on the top of the sewage treatment equipment; the PLC controller (23) is arranged in the control room (22); One side of the sewage treatment equipment is provided with a grid tank (1), a regulating tank (2), a sludge tank (10) and a clear water tank (11) in sequence; the other side of the sewage treatment equipment is provided with an oxidation tank (3), a coagulation reaction tank (4), a coagulation sedimentation tank (5), a secondary reaction tank (6), a secondary sedimentation tank (7), an intermediate tank I (8) and an intermediate tank II (9) in sequence; The grid tank (1), regulating tank (2), oxidation tank (3), coagulation reaction tank (4), coagulation sedimentation tank (5), secondary reaction tank (6), secondary sedimentation tank (7), intermediate tank I (8), intermediate tank II (9), and clear water tank (11) are connected in sequence; the coagulation sedimentation tank (5) and secondary sedimentation tank (7) are also connected to the sludge tank (10) respectively; The grille pool (1) is provided with a grille net (14); the grille pool (1) is provided with a sewage inlet connected to the outside of the sewage treatment equipment to receive sewage; the top of the grille pool (1) is provided with a material outlet; The oxidation pond (3) is provided with a reagent delivery device I (15) and a reagent delivery device II (16), and the reagent delivery device I (15) and the reagent delivery device II (16) are electrically connected to a PLC controller (23); hydrogen peroxide reagent is placed in the reagent delivery device I (15), and ferrous sulfate reagent is placed in the reagent delivery device II (16); The coagulation reaction tank (4) is provided with a reagent dosing device III (25); the reagent dosing device III (25) is electrically connected to the PLC controller (23), and contains polyaluminum sulfate or polyacrylamide reagent; The intermediate tank I (8) is provided with an ozone generator (26), which is connected to an external oxygen storage tank (24) through an air distribution pipeline (18); a solenoid valve provided on the oxygen storage tank (24) is electrically connected to a PLC controller (23); The ozone generating devices (26) are multiple and connected in sequence and laid at the bottom of the intermediate pool I (8); the ozone generating devices (26) are externally provided with a stainless steel pipe (21), internally provided with a dielectric (17), and internally provided with a high-voltage electrode (19); a discharge gap (20) is formed between the high-voltage electrode (19) and the dielectric (17), and between the dielectric (17) and the inner wall of the stainless steel pipe (21); the high-voltage electrode (19) and the dielectric (17) are connected to the port of the gas distribution pipeline (18); The intermediate tank II (9) is provided with a multi-media filter; The bottoms of the oxidation tank (3), coagulation sedimentation tank (5), secondary reaction tank (6), secondary sedimentation tank (7), intermediate tank I (8), intermediate tank II (9), sludge tank (10), and clear water tank (11) are all provided with sewage outlets connected to the outside of the sewage treatment equipment.

2. The concrete admixture production wastewater treatment system according to claim 1, characterized in that: The oxidation pool (3) is provided with a plurality of oxidation tanks (27) which are connected in sequence.

3. The concrete admixture production wastewater treatment system according to claim 1, characterized in that: The coagulation reaction tank (4) is provided with a plurality of reaction tanks (12) which are connected in sequence.

4. The concrete admixture production wastewater treatment system according to claim 1, characterized in that: The secondary reaction tank (6) is provided with a plurality of flocculation tanks (13) which are connected in sequence.

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