Dosing device for biodiesel wastewater treatment

Abstract

The utility model discloses a dosing device for biodiesel wastewater treatment. An air stirring device and a water replenishing pipe with a valve are arranged at the upper part of a dosing barrel; a lower chemical outlet pipe is sequentially connected with a pump inlet valve, a dosing pump and a pump outlet valve and then is connected to one side of the upper part of a jet mixer; a central pipe is arranged on a top panel with air holes of the jet mixer, the lower end of the central pipe extends into the jet mixer, and the upper end is sequentially connected with a wastewater inlet pump outlet valve, a wastewater inlet pump and a wastewater inlet pump front valve; the lower end of the jet mixer is connected with the upper end of a downcomer, the lower part of the downcomer extends into the adjusting tank, and the lower end of the downcomer is connected with a circular liquid distributor; and a water outlet at the lower part of the regulating tank is connected to a water inlet at the lower part of the EGSB anaerobic jar after being sequentially connected with a pump front valve, an EGSB anaerobic jar water inlet pump and a pump outlet valve. The EGSB anaerobic tank can effectively solve the problem of large fluctuation of various pollutant indexes of treated effluent due to large fluctuation of contents of COD, N, P and the like in inflow of the EGSB anaerobic tank in the prior art, so that the discharged water meets the requirements of water quality standards of sewage discharged into urban sewers.

Description

Technical Field

[0001] The utility model relates to the technical field of biodiesel wastewater treatment devices, in particular to a dosing device for treating wastewater with an EGSB anaerobic tank in biodiesel production. Background Technique

[0002] At present, in biodiesel production, treating wastewater with an EGSB anaerobic tank is the main means. Since various treatment agents are generally added directly to the regulation tank, and the EGSB anaerobic tank directly takes water from the regulation tank, the content fluctuations of discharge indexes such as COD, N, and P in the influent of the EGSB anaerobic tank are quite large, resulting in large fluctuations in the content of COD, N, P, etc. in the effluent treated by the EGSB anaerobic tank.

[0003] To stabilize the content of COD, N, P, etc. in the effluent of the EGSB anaerobic tank, it is necessary not only to control the content of nutrients such as COD, N, and P in the influent of the EGSB anaerobic tank and keep it stable, but also to ensure the activity of the activated sludge volume in the tank, so that the indexes of COD, N, P, etc. in the effluent can be stably qualified under high-load treatment operation conditions to meet the requirements of subsequent treatment and make the wastewater meet the discharge standards. Therefore, it is necessary to develop a dosing device for treating wastewater with an EGSB anaerobic tank in biodiesel production that can meet the above requirements. Summary of the Invention

[0004] The purpose of the utility model is to provide a solution that can effectively solve the problem in the prior art that the content fluctuations of nutrients such as COD, N, and P in the influent of the EGSB anaerobic tank are large and the direct intake of water from the regulation tank leads to large fluctuations in the content of various pollutant discharge indexes in the treated effluent, so that the pollutant factors in the discharged water meet the requirements of the Sewage Discharge Standard into Urban Sewers GB / T 31962-2015.

[0005] To achieve the above objectives, the dosing device for biodiesel wastewater treatment of the present utility model includes an injection mixer 1, a dosing barrel 2 with an opening 10, a regulating tank 3, and an EGSB anaerobic tank 4; an air stirring device 9 and a water supply pipe with a water replenishing valve 11 are installed on the upper part of the dosing barrel 2, and the medicine outlet pipe on one side of the lower part is connected to the upper side of the injection mixer 1 after successively connecting the inlet valve 15 of the dosing metering pump, the dosing metering pump 19, and the outlet valve 14 of the dosing metering pump; a central pipe 5 is installed on the top panel of the injection mixer 1, and air holes 8 are provided on this panel; the lower end of the central pipe 5 extends into the injection mixer 1, and the upper end is successively connected to the outlet valve 13 of the wastewater inlet pump, the wastewater inlet pump 18, and the valve 12 in front of the wastewater inlet pump; the lower end of the injection mixer 1 is connected to the upper end of a downcomer 6, the lower part of the downcomer 6 extends into the regulating tank 3, and the lower end of this downcomer 6 is connected to a circular liquid distributor 7; the lower water outlet of the regulating tank 3 is connected to the lower water inlet of the EGSB anaerobic tank 4 after successively connecting the valve 16 in front of the EGSB anaerobic tank inlet pump, the EGSB anaerobic tank inlet pump 20, and the outlet valve 17 of the EGSB anaerobic tank inlet pump.

[0006] The size of the regulating tank 3 is

[0007] The circular liquid distributor 7 includes a bud graft 7-1, a pipe 7-2, and a helix 7-3, and six of these helices 7-3 are evenly distributed.

[0008] The dosing device for biodiesel wastewater treatment with the above structure has the following technical features and beneficial effects:

[0009] 1. The dosing amount can be adjusted according to the influent treatment volume and treatment efficiency of wastewater treatment, ensuring the wastewater treatment efficiency without causing excessive loss of chemicals, and can meet the continuous and efficient operation of the EGSB anaerobic tank in the sewage treatment plant.

[0010] 2. The air stirring in the dosing barrel can quickly dissolve the chemicals, facilitating the management of the dosing amount, and effectively overcoming the problem of uneven chemical concentration caused by slow dissolution of chemicals.

[0011] 3. Under the action of the injection mixer and the circular liquid distributor, the concentration of the mixed liquid is made more uniform, reducing the chemical usage amount and the wastewater treatment cost.

[0012] 4. The structure is simple and compact, the operation is convenient and efficient, and the sewage treatment cost is greatly reduced. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the dosing device for biodiesel wastewater treatment of the present utility model.

[0014] Figure 2 is Figure 1 the schematic structural diagram of the circular liquid distributor in

[0015] Reference numerals: injection mixer 1, chemical dosing tank 2, regulating tank 3, EGSB anaerobic tank 4, central pipe 5, downcomer 6, circular liquid distributor 7, bud grafting 7-1, pipe 7-2, spiral 7-3, air hole 8, air stirring device 9, open end 10, make-up water valve 11, valve before wastewater feed pump 12, outlet valve of wastewater feed pump 13, outlet valve of chemical dosing pump 14, inlet valve of chemical dosing pump 15, valve before EGSB anaerobic tank feed pump 16, outlet valve of EGSB anaerobic tank feed pump 17, wastewater feed pump 18, chemical dosing pump 19, EGSB anaerobic tank feed pump 20. Detailed implementation manners

[0016] The following further elaborates in detail on the specific implementation manners of the chemical dosing device for biodiesel wastewater treatment of the present utility model in conjunction with the accompanying drawings.

[0017] Figures 1 - 2 As shown, the chemical dosing device for biodiesel wastewater treatment of the present utility model includes an injection mixer 1, a chemical dosing tank 2 with an open end 10, a regulating tank 3 and an EGSB anaerobic tank 4; an air stirring device 9 and a tap water pipe with a make-up water valve 11 are installed on the upper part of the chemical dosing tank 2, and the medicine outlet pipe on one side of the lower part is connected to the upper side of the injection mixer 1 after successively connecting the inlet valve 15 of the chemical dosing pump, the chemical dosing pump 19, and the outlet valve 14 of the chemical dosing pump; a central pipe 5 is installed on the top panel of the injection mixer 1, and an air hole 8 is provided on this panel; the lower end of the central pipe 5 extends into the injection mixer 1, and the upper end is successively connected to the outlet valve 13 of the wastewater feed pump, the wastewater feed pump 18, and the valve 12 before the wastewater feed pump; the lower end of the injection mixer 1 is connected to the upper end of the downcomer 6, the lower part of the downcomer 6 extends into the regulating tank 3, and the lower end of this downcomer 6 is connected to a circular liquid distributor 7, which includes a bud grafting 7-1, a pipe 7-2, and a spiral 7-3, and six of these spirals 7-3 are evenly distributed; the lower water outlet of the regulating tank 3 is connected to the lower water inlet of the EGSB anaerobic tank 4 after successively connecting the valve 16 before the EGSB anaerobic tank feed pump, the EGSB anaerobic tank feed pump 20, and the outlet valve 17 of the EGSB anaerobic tank feed pump.

[0018] When activated, first add a proper amount of clean water to the dosing barrel 2, and after adding water, add a proper amount of urea and ammonium phosphate and other nutrients from the open 10 of the dosing barrel 2, and turn on the air stirring device 9 to accelerate the dissolution; when the concentration of the medicine solution is qualified, according to the concentration requirements of nutrients such as N and P in the circulating water of the EGSB anaerobic tank, adjust the dosage of the dosing metering pump 2 and start the dosing metering pump 19, and let the medicine containing nutrients such as N and P enter from the upper side of the jet mixer 1; the atomized wastewater enters from the central pipe 5 located at the top of the jet mixer 1 through the wastewater inlet pump 18, and a proper amount of air is blown from the top panel of the jet mixer 1 The air enters through the air hole 8 and enters the downcomer 6 under the suction of the jet mixer 1. The air-liquid mixes violently and then passes through the special circular liquid distributor 7 to evenly distribute the mixed liquid on the liquid surface in the regulating tank 3, so that the concentration of the mixed liquid in the regulating tank 3 is uniform. The mixed liquid with uniform concentration enters the tank from the bottom of the EGSB anaerobic tank 4 after passing through the EGSB anaerobic tank water inlet pump front valve 16, the EGSB anaerobic tank water inlet pump 20 and the EGSB anaerobic tank water inlet pump outlet valve 17 for anaerobic treatment. The effluent from the EGSB anaerobic tank 4 enters the subsequent treatment. The wastewater that meets the discharge standard can be discharged into the municipal sewage network. Because the various indicators of the EGSB anaerobic tank 4 inlet are stable, the activity of the activated sludge in the tank is ensured. Therefore, the COD, N, P and other contents of the wastewater from the outlet of the EGSB anaerobic tank 4 are stable, which meets the requirements of wastewater subsequent treatment and high-load operation, and saves the consumption of nutrients such as N and P.

[0019] The utility model discloses a biodiesel wastewater treatment dosing device which adopts dosing injection and spiral dispersion technology to make the concentration of the mixed liquid uniform, save the dosage of the reagent, and thus reduce the biodiesel wastewater treatment cost of the sewage station; various pollution factors in the discharged wastewater can meet the discharge standards, achieve the purpose of environmental protection, and have obvious social benefits.

Claims

1. A biodiesel wastewater treatment dosing device, characterized by: It comprises a jet mixer (1), a dosing barrel (2) with an open mouth (10), a regulating tank (3) and an EGSB anaerobic tank (4); the upper part of the dosing barrel (2) is equipped with an air stirring device (9) and a tap water pipe with a water supply valve (11); the drug outlet pipeline on one side of the lower part is connected to the upper side of the jet mixer (1) after being connected to the inlet valve (15) of the dosing metering pump, the dosing metering pump (19) and the outlet valve (14) of the dosing metering pump in sequence; a central tube (5) is installed on the top panel of the jet mixer (1), and the panel is provided with an air hole (8); the lower end of the central tube (5) extends into the jet mixer. The upper end of the jet mixer (1) is connected in sequence to a wastewater inlet pump outlet valve (13), a wastewater inlet pump (18) and a wastewater inlet pump front valve (12); the lower end of the jet mixer (1) is connected to the upper end of a downcomer (6), the lower part of the downcomer (6) extends into the regulating tank (3), and the lower end of the downcomer (6) is connected to a circular liquid distributor (7); the lower water outlet of the regulating tank (3) is connected in sequence to an EGSB anaerobic tank inlet pump front valve (16), an EGSB anaerobic tank inlet pump (20) and an EGSB anaerobic tank inlet pump outlet valve (17), and then connected to the lower water inlet of the EGSB anaerobic tank (4).

2. The biodiesel wastewater treatment dosing device as claimed in claim 1, characterized in that: The size of the regulating tank (3) is 3. The biodiesel wastewater treatment dosing device as claimed in claim 1, characterized in that: The circular liquid distributor (7) comprises a budding (7-1), a tube (7-2) and a spiral (7-3), and six spirals (7-3) are evenly distributed.

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