Autonomous temperature control condensing device for biological sewage treatment system and application

Abstract

The invention provides an automatic temperature control condensing device for a biological sewage treatment system and application, and belongs to the field of sewage treatment. The device comprises: a housing; the interior of the shell is in a vacuum state, and the shell is filled with an organic solvent; the upper portion of the shell is a condensation area, and the lower portion of the shell is an evaporation area. Heat in the sewage treatment system is continuously discharged into the atmosphere by utilizing the principle of evaporation heat absorption and condensation heat dissipation of the organic solvent, so that the effect of autonomous temperature control is achieved; moreover, the microorganisms can be kept at a relatively proper growth temperature without additional energy, so that the treatment efficiency of the microorganisms is effectively improved, and the operation cost of sewage treatment is reduced.

Description

Technical Field

[0001] The present invention belongs to the field of sewage treatment, and in particular relates to an autonomous temperature-controlled condensing device for a biological sewage treatment system and an application thereof. Background Art

[0002] There are four methods of sewage treatment according to their working principles, namely physical method, chemical method, physicochemical method and biological method. Among them, the biological method is the most economical and effective, so it is widely used.

[0003] In biological sewage treatment, organic pollutants are mainly removed by microorganisms through adsorption, decomposition and oxidation of organic matter in the water environment. Microorganisms are the core of the entire treatment system, so keeping microorganisms in a better growth and reproduction environment for a long time is conducive to the smooth progress of biological sewage treatment.

[0004] In biological sewage treatment systems, temperature is a very important parameter, which has a great impact on the growth metabolism, reproduction rate and dissolved oxygen in the water of microorganisms. Most of the microorganisms in the activated sludge of biological sewage treatment systems are mesophilic bacteria (their suitable temperature is about 15-40℃). When the water environment temperature is too high, the growth metabolism and reproduction of microorganisms will be hindered, and it may also cause the denaturation of nucleic acids, proteins and other substances in bacteria, the inactivation of enzymes, and eventually the death of microorganisms, affecting the reaction efficiency of biological sewage treatment.

[0005] Therefore, in biological sewage treatment systems, regulating the water temperature at an appropriate temperature helps microorganisms to better decompose and remove pollutants. However, the commonly used condensation temperature control devices currently consume a lot of energy to achieve temperature regulation, which undoubtedly increases the operating cost of sewage treatment. Summary of the invention

[0006] The purpose of the present invention is to solve the above-mentioned difficulties existing in the prior art and to provide an autonomous temperature-controlled condensing device for a biological sewage treatment system. By filling an organic solvent with a boiling point of 30-40°C in the condensing device, the heat in the sewage treatment system is continuously discharged into the atmosphere by utilizing the principle of heat absorption by evaporation and heat dissipation by condensation of the organic solvent, thereby maintaining the water body at a more suitable biological reaction temperature, thereby achieving the purpose of autonomous temperature control and energy saving.

[0007] The present invention is achieved through the following technical solutions:

[0008] A first aspect of the present invention provides an autonomous temperature-controlled condensing device for a biological sewage treatment system, the device comprising: a housing;

[0009] The shell is in a vacuum state and is filled with an organic solvent;

[0010] The upper part of the shell is a condensation zone, and the lower part of the shell is an evaporation zone.

[0011] Preferably, the boiling point of the organic solvent is between 30-40°C;

[0012] The organic solvent is one or more of the following organic solvents: dichloromethane, methyl formate, ethyl ether, n-pentane, and ethyl bromide.

[0013] Preferably, the shell is an integral structure, in the shape of a hollow cylinder, ellipsoid or cuboid, with a closed end at the lower end and an open end at the upper end;

[0014] A sealing cover is provided at the open end.

[0015] Preferably, the housing comprises an upper housing and a lower housing which are connected in sequence from top to bottom;

[0016] The upper shell serves as a condensation zone, and the lower shell serves as an evaporation zone;

[0017] The upper and lower ends of the upper shell are both open ends;

[0018] The upper end of the lower shell is an open end, and the lower end is a closed end;

[0019] The lower end of the upper shell is sealed and connected to the upper end of the lower shell;

[0020] A sealing cover is arranged at the upper end of the upper shell.

[0021] Preferably, the housing comprises an upper housing, a middle housing and a lower housing which are sequentially connected from top to bottom;

[0022] The upper shell serves as a condensation zone, and the lower shell serves as an evaporation zone;

[0023] The upper shell and the lower shell are staggered;

[0024] The upper and lower ends of the upper shell are both open ends;

[0025] The upper end of the lower shell is an open end, and the lower end is a closed end;

[0026] The middle shell is an inclined tube with openings at both ends, the upper end of which is connected to the lower end of the upper shell, and the lower end of which is connected to the upper end of the lower shell;

[0027] The upper shell, the middle shell and the lower shell are sealed and connected;

[0028] A sealing cover is arranged at the upper end of the upper shell.

[0029] Preferably, the shell is made of carbon steel, titanium alloy or stainless steel.

[0030] Preferably, heat dissipation fins are provided on the outer surface of the condensation zone.

[0031] Preferably, an anti-corrosion coating is applied on the outer surface of the evaporation zone.

[0032] Preferably, the device further comprises a fixing bracket, and the evaporation zone can be vertically fixed on the fixing bracket;

[0033] The fixing bracket comprises a support rod and a plurality of fastening rings connected to the support rod;

[0034] A plurality of fastening rings are arranged along the length direction of the support rod.

[0035] A second aspect of the present invention provides a method for applying the above device, the method comprising:

[0036] One or more of the above devices are arranged in the biochemical reaction zone of the biological sewage treatment system, and the evaporation zone is completely immersed in the water body, and the condensation zone is located above the water body;

[0037] When the water temperature is higher than the boiling point of the organic solvent, the liquid organic solvent in the evaporation zone continuously absorbs the heat in the water and vaporizes into organic solvent gas, which rises to the condensation zone;

[0038] In the condensation zone, the organic solvent gas dissipates heat into the atmosphere and condenses into liquid organic solvent; the liquid organic solvent flows back to the evaporation zone under the action of gravity for the next cycle.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] The present invention utilizes the principle of heat absorption by evaporation and heat dissipation by condensation of organic solvents to continuously discharge the heat in the sewage treatment system into the atmosphere, thereby achieving the effect of autonomous temperature control; moreover, the present invention does not require additional energy to maintain the microorganisms at a more suitable growth temperature, effectively improving the treatment efficiency of the microorganisms and reducing the operating costs of sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A structural schematic diagram of an autonomous temperature-controlled condensing device for a biological sewage treatment system according to the present invention;

[0042] Figure 2 Another structural schematic diagram of the autonomous temperature-controlled condensing device for a biological sewage treatment system according to the present invention;

[0043] Figure 3 A schematic structural diagram of a fixed bracket in an autonomous temperature-controlled condensing device for a biological sewage treatment system according to the present invention. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0045] like Figure 1 and Figure 2 As shown, the present invention provides an autonomous temperature-controlled condensing device for a biological sewage treatment system, the device comprising: a shell, the inside of the shell is in a vacuum state, and the shell is filled with an organic solvent 5. The upper part of the shell is a condensation zone 1, and the lower part of the shell is an evaporation zone 2. At room temperature, the organic solvent 5 is in a liquid state and is located in the evaporation zone 2. When in use, the evaporation zone 2 is immersed in the sewage treatment system, and the condensation zone 1 is located in the air outside the sewage treatment system.

[0046] Preferably, the boiling point of the organic solvent 5 is between 30-40° C. The organic solvent 5 can be dichloromethane, methyl formate, ethyl ether, n-pentane, ethyl bromide, etc., or a mixture of any two or more of the above organic solvents 5 .

[0047] When the water temperature in the biological sewage treatment system is higher than the boiling point of the organic solvent 5, the liquid organic solvent 5 in the evaporation zone 2 continuously absorbs heat from the water body through the contact surface between the shell and the water body and vaporizes into organic solvent gas. The organic solvent gas rises to the condensation zone 1 along the inner cavity of the shell under the action of the pressure difference; in the condensation zone 1, the organic solvent gas dissipates heat into the atmosphere through the shell and condenses into liquid organic solvent 5; the liquid organic solvent 5 flows back to the evaporation zone 2 under the action of gravity for the next round of circulation, thereby achieving the purpose of autonomously regulating and stabilizing the water temperature.

[0048] The present invention creatively utilizes the principle of heat absorption by evaporation and heat dissipation by condensation of low-boiling-point organic solvent 5 to continuously discharge the heat in the sewage treatment system into the atmosphere, thereby achieving the effect of automatic temperature control. Moreover, the device of the present invention does not require additional energy to maintain the microorganisms at a more suitable growth temperature, effectively improving the treatment efficiency of the microorganisms and reducing the operating cost of sewage treatment.

[0049] exist Figure 1 In the embodiment shown, the shell is an integral structure, and is in the shape of a hollow cylinder, ellipsoid or cuboid. For example, a hollow tube is used, the lower end of which is a closed end, the upper end is an open end, and a sealing cover 3 is provided at the open end. The material of the shell is preferably a material with good thermal conductivity, for example, carbon steel, titanium alloy, stainless steel, etc. During production, an organic solvent 5 is filled into the shell through the open end of the shell, and then the inner cavity of the shell is evacuated and the shell is sealed by the sealing cover 3.

[0050] exist Figure 2In the embodiment shown, the shell includes an upper shell and a lower shell that are connected in sequence from top to bottom. The central axes of the upper shell and the lower shell can be located on the same straight line or at a certain angle, as long as it can ensure that the condensed organic solvent can flow back to the lower shell. The upper shell serves as the condensation zone 1, and the lower shell serves as the evaporation zone 2; the upper and lower ends of the upper shell are both open ends, the upper end of the lower shell is an open end, and the lower end is a closed end, and the lower end of the upper shell is sealed and connected to the upper end of the lower shell, for example, by welding or by using a flange 6. A sealing cover 3 is provided at the upper end of the upper shell. During production, the organic solvent 5 is first filled in the lower shell, and then the upper shell and the lower shell are sealed and connected, and finally the inner cavity of the shell is evacuated and the shell is sealed by the sealing cover 3.

[0051] In another embodiment of the present invention, the shell includes an upper shell, a middle shell and a lower shell which are connected in sequence from top to bottom. The upper shell serves as a condensation zone 1, the lower shell serves as an evaporation zone 2, the middle shell serves as a transition section between the upper shell and the lower shell, and the central axes of the upper shell and the lower shell are not on the same straight line, that is, the upper shell and the lower shell are staggered. The upper and lower ends of the upper shell are both open ends, the upper end of the lower shell is an open end, and the lower end is a closed end, and the middle shell is an inclined tube with both ends open, the upper end of which is connected to the lower end of the upper shell, and the lower end is connected to the upper end of the lower shell; the upper shell, the middle shell and the lower shell are sealed and connected, for example, by welding or flange connection. A sealing cover 3 is provided at the upper end of the upper shell, and the organic solvent can flow into the lower shell along the upper shell and the middle shell. During production, the organic solvent 5 is first filled in the lower shell, and then the upper shell, the middle shell and the lower shell are sealed and connected, and finally the inner cavity of the shell is evacuated and the shell is sealed by the sealing cover 3.

[0052] The materials of the upper shell, the middle shell, and the lower shell may be the same or different, and the materials are preferably materials with good thermal conductivity, such as carbon steel, titanium alloy, stainless steel, etc.

[0053] In another embodiment of the present invention, heat dissipation fins 4 are provided on the outer surface of the condensation zone 1, and heat can be better dissipated into the atmosphere through the heat dissipation fins 4. Preferably, the heat dissipation fins 4 can be existing high-frequency resistance welded spiral fins or other commonly used heat dissipation fins 4.

[0054] In another embodiment of the present invention, an anti-corrosion coating is coated on the outer surface of the evaporation area 2, which can prevent the evaporation area 2 from being oxidized and rusted due to long-term immersion in water or being corroded by harmful substances in the water.

[0055] When the temperature of the condensation zone 1 is higher than the temperature of the evaporation zone 2, the gas formed by the evaporation of the organic solvent 5 in the evaporation zone 2 cannot be condensed after reaching the condensation zone, the liquid stops evaporating, and the device of the present invention automatically stops working, so the device of the present invention has the characteristic of one-way heat transfer. However, the outside temperature is generally rarely above 40 degrees, and when the water temperature is lower than 40 degrees, the temperature of the evaporation zone 2 is low, so there is no need to cool the water body. Only when the water temperature is higher than the outside temperature due to the biochemical reaction temperature, the device of the present invention will work.

[0056] In another embodiment of the present invention, the device further comprises a fixing bracket, and the evaporation zone 2 can be vertically fixed on the fixing bracket. Figure 3 As shown, the fixed bracket includes a support rod 7 and a plurality of fastening rings 8 connected to the support rod 7, and the plurality of fastening rings 8 are arranged along the length direction of the support rod 7; the fastening rings 8 can adopt a variety of existing structures for fixing steel pipes, such as clamps, etc. The plane where each fastening ring 8 is located is perpendicular to the length direction of the support rod 7, and one side of the fastening ring 8 is fixedly connected to the support rod 7, and the central axes of the plurality of fastening rings 8 are located on the same straight line. When in use, the bottom of the support rod 7 is fixed to the bottom of the biochemical reaction zone, and the evaporation zone 2 is inserted into the plurality of fastening rings 8. In this way, the evaporation zone 2 can be fixed by the plurality of fastening rings 8, so that the evaporation zone 2 is located in the water body, and the condensation zone 1 is located above the water body.

[0057] In another embodiment of the present invention, the total length of the shell is 4.5m and the diameter is 10cm. The length of the condensation zone 1 at the upper part of the shell is 2.5m, and the length of the evaporation zone 2 at the lower part is 2m. In actual use, the length of the shell can be designed according to the height of the sewage in the sewage treatment system so that the evaporation zone 2 is completely submerged in the water body and the lower end of the evaporation zone 2 touches the bottom of the water. The evaporation zone 2 is filled with a 0.5m high organic solvent 5 (for example, dichloromethane liquid).

[0058] When the above device is used to adjust the temperature of water, one or more devices of the present invention can be set in the biochemical reaction zone of the biological sewage treatment system, that is, the device of the present invention can be set in one or more places of the anaerobic zone, the anoxic zone or the aerobic zone. The temperature of the water body can be controlled below 40°C by using the device of the present invention, which is conducive to the growth and reproduction of microorganisms.

[0059] In summary, the present invention provides an autonomous temperature control condensing device for a biological sewage treatment system. The device is arranged in the biochemical reaction zone of the biological sewage treatment, and the excess heat in the biochemical reaction zone is continuously discharged into the atmosphere by utilizing the principle of evaporation heat absorption and condensation heat dissipation of low-boiling point organic solvents, thereby maintaining the microorganisms at a more suitable growth temperature and achieving the effect of autonomous temperature control. Moreover, the operation of the device of the present invention does not require additional energy, and can effectively improve the treatment efficiency of microorganisms, enhance the resistance of the sewage treatment system to the external environment, reduce the operating cost of sewage treatment, and save energy consumption.

[0060] In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0061] The above technical solution is only one implementation mode of the present invention. For those skilled in the art, it is easy to make various types of improvements or modifications based on the principles disclosed in the present invention, and it is not limited to the technical solution described in the above specific embodiments of the present invention. Therefore, the above description is only preferred and does not have a restrictive meaning.

Claims

1. An autonomous temperature-controlled condensing device for a biological sewage treatment system, characterized in that: The device comprises: a housing; The shell is in a vacuum state and is filled with an organic solvent; The upper part of the shell is a condensation zone, and the lower part of the shell is an evaporation zone.

2. The autonomous temperature control condensing device for a biological sewage treatment system according to claim 1, characterized in that: The boiling point of the organic solvent is between 30-40°C; The organic solvent is one or more of the following organic solvents: dichloromethane, methyl formate, ethyl ether, n-pentane, and ethyl bromide.

3. The autonomous temperature control condensing device for a biological sewage treatment system according to claim 1, characterized in that: The shell is an integral structure, in the shape of a hollow cylinder, ellipsoid or cuboid, with a closed end at the lower end and an open end at the upper end; A sealing cover is provided at the open end.

4. The autonomous temperature control condensing device for a biological sewage treatment system according to claim 1, characterized in that: The housing comprises an upper housing and a lower housing which are connected in sequence from top to bottom; The upper shell serves as a condensation zone, and the lower shell serves as an evaporation zone; The upper and lower ends of the upper shell are both open ends; The upper end of the lower shell is an open end, and the lower end is a closed end; The lower end of the upper shell is sealed and connected to the upper end of the lower shell; A sealing cover is arranged at the upper end of the upper shell.

5. The autonomous temperature control condensing device for a biological sewage treatment system according to claim 1, characterized in that: The housing comprises an upper housing, a middle housing and a lower housing which are connected in sequence from top to bottom; The upper shell serves as a condensation zone, and the lower shell serves as an evaporation zone; The upper shell and the lower shell are staggered; The upper and lower ends of the upper shell are both open ends; The upper end of the lower shell is an open end, and the lower end is a closed end; The middle shell is an inclined tube with openings at both ends, the upper end of which is connected to the lower end of the upper shell, and the lower end of which is connected to the upper end of the lower shell; The upper shell, the middle shell and the lower shell are sealed and connected; A sealing cover is arranged at the upper end of the upper shell.

6. The autonomous temperature-controlled condensing device for a biological sewage treatment system according to claim 1, characterized in that: The shell is made of carbon steel, titanium alloy or stainless steel.

7. The autonomous temperature control condensing device for a biological sewage treatment system according to claim 1, characterized in that: Heat dissipation fins are arranged on the outer surface of the condensation zone.

8. The autonomous temperature-controlled condensing device for a biological sewage treatment system according to claim 1, characterized in that: An anti-corrosion coating is applied on the outer surface of the evaporation zone.

9. The autonomous temperature-controlled condensing device for a biological sewage treatment system according to claim 1, characterized in that: The device further comprises a fixing bracket, and the evaporation zone can be vertically fixed on the fixing bracket; The fixing bracket comprises a support rod and a plurality of fastening rings connected to the support rod; A plurality of fastening rings are arranged along the length direction of the support rod.

10. A method for using the autonomous temperature control condensing device for a biological sewage treatment system according to any one of claims 1 to 9, characterized in that: The method comprises: One or more of the above devices are arranged in the biochemical reaction zone of the biological sewage treatment system, and the evaporation zone is completely immersed in the water body, and the condensation zone is located above the water body; When the water temperature is higher than the boiling point of the organic solvent, the liquid organic solvent in the evaporation zone continuously absorbs the heat in the water and vaporizes into organic solvent gas, which rises to the condensation zone; In the condensation zone, the organic solvent gas dissipates heat into the atmosphere and condenses into liquid organic solvent; the liquid organic solvent flows back to the evaporation zone under the action of gravity for the next cycle.

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