Sludge mixing device

Abstract

The utility model discloses a sludge mixing device which comprises a stirring inner bin, a stirring paddle is mounted in the stirring inner bin, a sample inlet is formed in the stirring inner bin, a supernatant outlet is formed in the upper part of the stirring inner bin, a sludge outlet is formed in the bottom of the stirring inner bin, and a ceramic membrane is mounted on the outer side of the stirring inner bin. The supernate outlet is formed right above the inlet of the ceramic membrane, or the supernate outlet is communicated with the inlet of the ceramic membrane, and the ceramic membrane is provided with a membrane liquid outlet. According to the utility model, the sludge discharged from the sewage treatment system can be mixed and precipitated, the obtained supernate is separated and purified by the ceramic membrane, suspended solids, colloids, microorganisms and pollutants in water are removed, and the obtained organic acid is recycled back to the sewage treatment system to be utilized.

Description

Technical Field

[0001] The utility model relates to the field of sludge recovery, in particular to a sludge mixing device. Background Art

[0002] A Chinese patent application with publication number CN205152044U discloses an integrated complete set of equipment for the basic process of sludge dewatering and concentration treatment, the integrated complete set of equipment comprising a tank, a pipeline, a motor, and a feeder; wherein the pipeline at the top of the tank is connected to a sludge collection tank, and the pipeline at the bottom of the tank is connected to a filter press via a sludge pump; a feeder and a motor are provided on the top of the tank, and a stirring rod is provided in the tank, which is driven by the motor to rotate the stirring rod; sludge enters the pipe body from the mud inlet via a mud inlet pump, and sludge is discharged from the mud outlet via a mud outlet pump; a supernatant detection water inlet is provided on the side of the tank body, and the water discharged from the supernatant detection water inlet in this solution is discharged or used as wastewater. The sludge discharged from the sewage treatment system contains organic acids, so after the sludge discharged from the sewage treatment system is concentrated, the supernatant produced contains a large amount of organic acids. Directly discharging or using the sludge as wastewater will result in a large amount of organic acid waste and cause environmental pollution. Utility Model Content

[0003] The utility model aims to provide a sludge mixing device, which can directly concentrate the sludge discharged from the sewage treatment system, and directly recover organic acid from the supernatant, and recycle it back to the sewage treatment system for utilization.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a sludge mixing device, including a stirring inner chamber, a stirring paddle is installed in the stirring inner chamber, the stirring inner chamber is provided with an inlet, a supernatant outlet is provided at the upper part of the stirring inner chamber, a mud outlet is provided at the bottom of the stirring inner chamber, a ceramic membrane is installed on the outside of the stirring inner chamber, the supernatant outlet is installed directly above the inlet of the ceramic membrane, or the supernatant outlet is connected to the inlet of the ceramic membrane, and the ceramic membrane is provided with a membrane liquid outlet.

[0005] The ceramic membrane in the utility model can separate and purify the supernatant to obtain organic acid for recycling.

[0006] In one of the preferred embodiments, the ceramic membrane includes an annular ceramic membrane having a diameter larger than that of the stirring inner chamber and arranged on the outside of the stirring inner chamber. A bottom membrane is horizontally sealed between the annular ceramic membrane and the stirring inner chamber, and a purification cavity is formed between the ceramic membrane and the outer wall of the stirring inner chamber.

[0007] The supernatant flowing out of the supernatant outlet flows into the purification chamber to remove suspended matter, colloids, microorganisms and pollutants in the supernatant.

[0008] In one preferred embodiment, the top of the annular ceramic membrane is open, and the supernatant outlet is installed directly above the top opening of the ceramic membrane.

[0009] The supernatant flowing out of the supernatant outlet flows directly into the ceramic membrane for separation and purification.

[0010] In one preferred embodiment, a connecting hose is installed at the liquid outlet of the membrane, and the connecting hose is connected to the liquid inlet of the pump.

[0011] The separated and purified supernatant is circulated to the sewage treatment system through a pump for reuse.

[0012] In one preferred embodiment, the sludge mixing device further includes a shell, which is installed on the outside of the ceramic membrane.

[0013] In one of the preferred embodiments, a support base is provided at the bottom of the housing.

[0014] In one preferred embodiment, the sample inlet is located at the top of the stirring inner chamber.

[0015] In one preferred embodiment, the supernatant outlet is equipped with an electric switch 1.

[0016] In one preferred embodiment, the membrane liquid outlet is equipped with an electric switch 2.

[0017] In one of the preferred embodiments, the mud outlet is equipped with an electric switch 3.

[0018] Automatic control of the supernatant outlet, membrane liquid outlet and mud outlet is achieved through electric switches.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The utility model can mix and precipitate the sludge discharged from the sewage treatment system. The obtained supernatant is separated and purified by a ceramic membrane to remove suspended matter, colloids, microorganisms and pollutants in the water. The obtained organic acid is recycled back to the sewage treatment system for utilization.

[0021] 2. The utility model utilizes the water resources generated after treatment in the sewage treatment plant, which saves energy and protects the environment and improves the comprehensive utilization efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an axial view of a sludge mixing device in one embodiment of the present invention;

[0023] Figure 2 The utility model is a flow chart of a saline-alkali land improvement system.

[0024] In the figure:

[0025] 1-Sewage treatment system; 2-Effluent temporary storage facilities; 3-Excess sludge temporary storage facilities; 4-Sludge concentration facilities; 5-Other easily degradable organic solid waste temporary storage facilities; 6-Sludge mixing device; 7-Mixing facilities; 8-Composting system; 9-Layered cake pressing system; 10-Saline-alkali sandy soil to be treated; 11-Plant temporary storage facilities; 12-Formed fuel processing system; 13-Ash temporary storage system; 14-Seedling cultivation system; 15-Heating system; 16-Amendment temporary storage facilities. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments and features of the embodiments of the present invention may be combined unless they conflict. For ease of description, the words "upper," "lower," "left," and "right" appear below merely to indicate the directions of upper, lower, left, and right in the accompanying drawings and do not limit the structure.

[0027] like Figure 1 As shown, the sludge mixing device 6 includes an inner mixing chamber 6.1, an outer shell 6.2, a stirring paddle 6.3, an inlet 6.4, a supernatant outlet 6.5, an electric switch 1 6.6, a ceramic membrane 6.7, a membrane liquid outlet 6.8, an electric switch 2 6.9, a sludge outlet 6.10, an electric switch 3 6.11, a supporting base 6.12, a connecting hose 6.13, and a pump 6.14.

[0028] The inner mixing chamber 6.1 is equipped with a stirring paddle 6.3. The inner mixing chamber 6.1 is also provided with an inlet 6.4, located at the top of the inner mixing chamber 6.1. A supernatant outlet 6.5 is located at the top of the inner mixing chamber 6.1, and a mud outlet 6.10 is located at the bottom of the inner mixing chamber 6.1. The ceramic membrane 6.7 includes an annular ceramic membrane 6.7.1 having a diameter greater than that of the inner mixing chamber 6.1 and located outside the inner mixing chamber 6.1. A bottom membrane 6.7.2 is horizontally and sealedly connected between the annular ceramic membrane 6.7.1 and the inner mixing chamber 6.1, forming a purification chamber between the ceramic membrane 6.7 and the outer wall of the inner mixing chamber 6.1. The annular ceramic membrane 6.7.1 is open at the top, and the supernatant outlet 6.5 is installed directly above the top opening of the ceramic membrane 6.7. A connecting hose 6.13 is installed at the membrane outlet 6.8, which is connected to the liquid inlet of a pump 6.14. The sludge mixing device also includes a housing 6.2, which is mounted on the outside of the ceramic membrane 6.7. A support base 6.12 is provided at the bottom of the housing 6.2. The supernatant outlet 6.5 is equipped with an electric switch 16.6. The membrane liquid outlet 6.8 is equipped with an electric switch 26.9. The mud outlet 6.10 is equipped with an electric switch 36.11. These electric switches enable automatic control of the supernatant outlet, membrane liquid outlet, and mud outlet.

[0029] In this embodiment, the relevant steps for using the sludge mixing device 6 are:

[0030] A portion of the sludge from the sewage treatment system's sludge return system is diverted through a pipe connected to inlet 6.4 and fed into the mixing chamber 6.1 of the sludge mixing device 6. Simultaneously, a portion of the sandy soil from the saline-alkali land to be treated is also fed into the mixing chamber 6.1 of the sludge mixing device 6 through inlet 6.4, with the sand accounting for approximately 20-30% of the sludge volume. The sludge and sand are thoroughly mixed by agitator 6.3 for 8 hours. After stirring ceases, the mixture is allowed to settle for 8 hours. Then, electric switch 1 6.6 is opened, and the sludge supernatant enters the housing 6.2 through supernatant outlet 6.5. The membrane outlet 6.8 of the annular ceramic membrane 6.7 is connected to pump 6.14 via connecting hose 6.13. The pump and electric switch 2 6.9 are turned on, and the organic acids in the sludge supernatant are returned to the sewage treatment system 1 through the hose outlet to replenish the carbon source. Electric switch 3 6.11 is opened, and the settled sludge flows out through mud outlet 6.10. A portion is ultimately used for composting, while the remainder is directly pressed into cakes. The entire system is held upright by the support base 6.12.

[0031] like Figure 2As shown, the sludge mixing device 6 in the present invention can be used in a saline-alkali land improvement system, which includes a sewage treatment system 1, an effluent temporary storage facility 2, a residual sludge temporary storage facility 3, a sludge concentration facility 4, other easily degradable organic solid waste temporary storage facilities 5, a sludge mixing device 6, a mixing facility 7, a composting system 8, a layered cake pressing system 9, saline-alkali land sand to be treated 10, a plant temporary storage facility 11, a molded fuel processing system 12, an ash temporary storage system 13, a seedling cultivation system 14, a heating system 15 and an improver temporary storage facility 16.

[0032] In this embodiment, the sewage treatment system 1 is connected to the effluent temporary storage facility 2, the residual sludge temporary storage facility 3, the sludge mixing device 6 and the sludge concentration facility 4 respectively. The sewage treatment system 1 treats the municipal sewage, and the recycled water that meets the treatment standards is temporarily stored in the effluent temporary storage facility 2. The generated sludge and residual sludge are stored in the residual sludge temporary storage facility 3. The sewage treatment system 1 includes a sludge return process. This time, it is considered that 10% to 20% of the returned sludge enters the sludge mixing device 6, and the rest is directly returned to replenish the sludge for the sewage treatment system 1.

[0033] The residual sludge storage facility 3 configured in this embodiment is respectively connected to the sludge thickening facility 4 and the plant storage facility 11. A part of the residual sludge flows from the residual sludge storage facility 3 to the sludge thickening facility 4 and is then concentrated by gravity, wherein the supernatant flows to the sewage treatment system 1 for treatment, and the lower concentrated sludge flows to the mixing facility 7. The plant storage facility 11 crushes the dead plants collected from the saline-alkali land and adds another part of the residual sludge. The residual sludge generates adhesion, and is pressed and dried after mixing in the molded fuel processing system 12 to form molded fuel.

[0034] The water temporary storage facility 2 configured in this embodiment is respectively connected to the seedling cultivation system 14 and the saline-alkali land sand 10 to be treated. The water temporary storage facility 2 provides the seedling cultivation system 14 with the water required for plant growth. After the seedling cultivation system 14 is transplanted to the saline-alkali land to be treated, it provides water to the saline-alkali land sand 10 to be treated.

[0035] In this embodiment, the mixing facility 7 is connected to the sludge thickening facility 4 and the sludge mixing device 6 respectively, and its main function is to uniformly mix the concentrated sludge and the returned sedimentation sludge.

[0036] In this embodiment, the composting system 8 is connected to the mixing facility 7, the temporary storage facility 5 for other easily degradable organic solid waste, the layered cake pressing system 9, the ash temporary storage system 13 and the heating system 15 respectively. The mixing facility 7 provides the composting system 8 with evenly mixed sludge, and the temporary storage facility 5 for other easily degradable organic solid waste provides the composting system 8 with organic solid waste including livestock and poultry manure and kitchen waste. If this part of solid waste is not available on site, it can also be omitted. The ash temporary storage system 13 provides the composting system 8 with ash produced after the incineration of molded fuel, and the remaining sludge, other easily degradable organic solid waste and ash are composted to produce organic fertilizer. When the temperature is low, the heating system 15 provides a heat source for the composting system 8.

[0037] In this embodiment, the layered cake pressing system 9 is configured to be connected to the seedling cultivation system 14, the ash storage system 13, the composting system 8 and other easily degradable organic solid waste storage facilities 5 respectively. The ash storage system 13 provides ash for the layered cake pressing system 9, the composting system 8 provides organic fertilizer for the layered cake pressing system 9, and the other easily degradable organic solid waste storage facilities 5 provide other organic matter for the layered cake pressing system 9.

[0038] The saline-alkali land improvement system combines the treatment of solid wastes such as sludge, other organic solid wastes, and ash with the management of saline-alkali land in desert areas. It is equipped with a layered cake pressing system and temporary storage facilities for improvers, and is configured with corresponding pipeline facilities to meet the needs of saline-alkali land management. It effectively overcomes the shortcomings of general management processes such as high costs and operational difficulties, and solves the problem of difficulty in stabilizing the management process system.

[0039] The contents described in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent modifications to the embodiments by those skilled in the art fall within the scope defined by the claims attached to the present invention.

Claims

1. A sludge mixing device, comprising an inner stirring chamber (6.1), wherein a stirring paddle (6.3) is installed in the inner stirring chamber (6.1), the inner stirring chamber (6.1) is provided with an inlet (6.4), a supernatant outlet (6.5) is provided at the top of the inner stirring chamber (6.1), and a sludge outlet (6.10) is provided at the bottom of the inner stirring chamber (6.1), characterized in that: A ceramic membrane (6.7) is installed outside the stirring inner chamber (6.1), the supernatant outlet (6.5) is installed directly above the inlet of the ceramic membrane (6.7), or the supernatant outlet (6.5) is connected to the inlet of the ceramic membrane (6.7), and the ceramic membrane (6.7) is provided with a membrane liquid outlet (6.8).

2. The sludge mixing device according to claim 1, characterized in that: The ceramic membrane (6.7) comprises an annular ceramic membrane (6.7.1) having a diameter greater than that of the inner stirring chamber (6.1) and arranged outside the inner stirring chamber (6.1); a bottom membrane (6.7.2) is horizontally sealed between the annular ceramic membrane (6.7.1) and the inner stirring chamber (6.1); and a purification chamber is formed between the ceramic membrane (6.7) and the outer wall of the inner stirring chamber (6.1).

3. The sludge mixing device according to claim 2, characterized in that: The annular ceramic membrane (6.7.1) has an opening at the top, and the supernatant outlet (6.5) is installed just above the opening at the top of the ceramic membrane (6.7).

4. The sludge mixing device according to claim 1, characterized in that: A connecting hose (6.13) is installed at the membrane liquid outlet (6.8), and the connecting hose (6.13) is communicated with the liquid inlet of the pump (6.14).

5. The sludge mixing device according to any one of claims 1 to 4, characterized in that: It also includes a housing (6.2), which is installed on the outside of the ceramic membrane (6.7).

6. The sludge mixing device according to claim 5, characterized in that: A supporting base (6.12) is provided at the bottom of the housing (6.2).

7. The sludge mixing device according to any one of claims 1 to 4, characterized in that: The sample inlet (6.4) is arranged at the top of the stirring inner chamber (6.1).

8. The sludge mixing device according to any one of claims 1 to 4, characterized in that: The supernatant outlet (6.5) is equipped with an electric switch 1 (6.6).

9. The sludge mixing device according to any one of claims 1 to 4, characterized in that: The membrane liquid outlet (6.8) is equipped with an electric switch 2 (6.9).

10. The sludge mixing device according to any one of claims 1 to 4, characterized in that: The mud outlet (6.10) is equipped with an electric switch 3 (6.11).

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