Baffle plate type solar photo-thermal converter and cold region sewage treatment device

Abstract

The utility model provides a baffle plate type solar photo-thermal converter and cold region sewage treatment plant, including more than two heat exchange units, the heat exchange units are connected in parallel on the liquid inlet pipeline of bioreactor entering the regulating reservoir, each heat exchange unit includes the shell of hollow cylinder structure and the baffle structure located in the shell, and the baffle plate type solar photo-thermal converter is connected in parallel with the liquid inlet pipeline of bioreactor entering the regulating reservoir. The outer shell comprises a transparent shell, a transparent inner tube coated with a photothermal conversion material is arranged in the transparent shell, a vacuum layer is formed between the transparent shell and the transparent inner tube, and a liquid inlet and a liquid outlet of the outer shell are both located in the transparent inner tube; the baffling structure comprises a threaded pipe-shaped baffle plate and a reflecting layer fixedly connected to the outer surface of the baffle plate; and heat is supplied to a cold region sewage treatment facility through photothermal conversion, so that the problem of low sewage treatment efficiency under low-temperature stress is solved.

Description

Technical Field

[0001] The utility model belongs to the field of sewage treatment systems, and specifically relates to a baffled solar thermal converter and a cold region sewage treatment device. Background Art

[0002] The battle against pollution must both reduce pollution and lower carbon emissions, which is the general requirement for the battle to protect clear waters.

[0003] Biological methods use the metabolism of microorganisms to convert pollutants in water into stable and harmless substances. It is the mainstream method of sewage purification. However, the growth, reproduction and activity of microorganisms are restricted under low temperature stress, and the sewage treatment efficiency decreases. Taking nitrifying bacteria as an example, its optimal growth temperature is 25-30 o C, temperature below 10 o When the temperature is below 4 °C, some parts enter the dormant state. o C, the metabolic capacity is lost. At the same time, the growth, reproduction and metabolism of denitrifying bacteria are also inhibited, and the effluent ammonia nitrogen NH4-N and total nitrogen TN do not meet the standards. Low temperature has become a key factor restricting sewage treatment in cold regions. Regulating operating parameters such as sludge load, hydraulic retention time, and dissolved oxygen can stabilize the effect of biological low-temperature treatment, but the treatment cost and infrastructure costs will increase accordingly; geothermal, water / air source heat pumps, and gas can maintain the normal operation of sewage treatment facilities in cold regions in winter through heating and insulation, but the geographical and spatial limitations are obvious. Solar energy has the advantages of being green, environmentally friendly, cheap and easy to obtain. Using solar energy to provide heat for sewage treatment facilities is of great significance for breaking the barriers of low efficiency and high cost of sewage operation in the low-temperature season, and for improving quality and efficiency with green and low-carbon empowerment.

[0004] Current photothermal devices have the following advantages and disadvantages: Flat-plate photothermal devices have low light energy utilization efficiency and are prone to dissipating heat to the surroundings through conduction, convection, radiation, etc., resulting in large heat losses; the internal fluid flow of vacuum tube photothermal devices is steady flow, and the mass transfer effect needs to be improved; concentrating photothermal devices have good focusing performance and optical efficiency, but the application of low-temperature cold zone sewage treatment systems that take into account light utilization efficiency, turbulence and thermal insulation has not yet been achieved. Summary of the invention

[0005] The purpose of the utility model is to provide a baffled solar thermal converter, which can convert abundant solar energy resources into efficient thermal energy, intelligently provide heat for cold-region sewage treatment facilities, solve the bottleneck problem of low temperature stress in cold-region sewage treatment, and improve quality and efficiency with green and low-carbon energy.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A baffle-type solar thermal converter includes more than two heat exchange units 4, wherein the heat exchange units 4 are connected in parallel to the liquid inlet pipeline of the bioreactor 1 entering the regulating tank 9, and the heat exchange units include an outer shell 41 of a hollow cylindrical structure and a baffle structure 42 located inside the outer shell, wherein the outer shell 41 includes a transparent outer shell 411, wherein the interior of the transparent outer shell 411 is a transparent inner tube 413 coated with a photothermal conversion material, and a vacuum layer 412 is formed between the transparent outer shell 411 and the transparent inner tube 413, a liquid inlet 43 is provided on one bottom surface of the outer shell 41, and a liquid outlet 44 is provided on the other bottom surface, and both the liquid inlet 43 and the liquid outlet 44 are located inside the transparent inner tube 413; the baffle structure 42 includes a threaded tubular baffle 421 and a reflective layer 422 fixedly connected to the outer surface of the baffle 421; the axis of the baffle 421 is located below the liquid inlet 43.

[0008] Another object of the present invention is to provide a cold region sewage treatment device, comprising a bioreactor 1, a liquid inlet pipeline, two or more heat exchange units 4 and a regulating tank 9, wherein the heat exchange unit 4 is fixedly connected to the cover plate of the bioreactor 1, the outlet pipe 10 of the bioreactor 1 or the tap water inlet pipe 7 is connected to the liquid inlet pipeline, the liquid inlet pipeline comprises a liquid inlet pipe 3 and a liquid outlet pipe 11, the liquid inlet port 43 is connected to the liquid inlet pipe 3, the liquid outlet port 44 is connected to the liquid outlet pipe 11, the liquid outlet pipe 11 is connected to the regulating tank 9, and the regulating tank 9 is connected to the bioreactor 1.

[0009] As a more optimal technical solution of the present invention, a T-shaped slide groove 8 is provided on the cover plate of the bioreactor 1 , and a T-shaped sliding block is fixedly connected to the outer surface of the transparent shell 411 and installed in the T-shaped slide groove 8 .

[0010] As a more optimal technical solution of the present utility model, a lifting pump 2 is installed on the liquid inlet pipe 3 at the connection with the bioreactor 1 to smoothly allow the tail water in the bioreactor 1 to enter the liquid inlet 43 .

[0011] As a more optimal technical solution of the present utility model: a flow control valve 5 is provided at the liquid inlet 43 and the liquid outlet 44 of each heat exchange unit 4 .

[0012] The beneficial effects are as follows:

[0013] The baffled solar thermal converter of the present invention converts solar energy into heat for heating cold-region sewage treatment facilities, thereby solving the problem of low sewage treatment efficiency under low-temperature stress and facilitating low-carbon operation of sewage facilities. It has the advantages of simple structure, good effect and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1A schematic diagram of a baffled solar thermal conversion device for heating sewage treatment facilities in cold regions provided by the present invention; (in order to clearly show the internal structure, dotted lines are not used in the line diagram inside the heat exchange unit)

[0015] Figure 2 It is a schematic diagram of the baffle photothermal reaction unit of the present invention;

[0016] Among them, 1. bioreactor, 2. lifting pump, 3. liquid inlet pipe, 4. heat exchange unit, 5. flow control valve, 6. temperature sensor, 7. tap water inlet pipe, 8. T-slot, 9. regulating tank, 10. water outlet pipe of bioreactor, 11. liquid outlet pipe, 41. outer shell, 42. baffle structure, 43. water inlet, 44. water outlet, 411. transparent outer shell, 412. vacuum layer, 413. transparent inner tube, 421. baffle, 422. aluminum foil reflective layer. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0018] like Figure 2 As shown, the present invention provides a baffle-type solar thermal converter, including more than two heat exchange units 4, the heat exchange units 4 are connected in parallel on the liquid inlet pipeline of the bioreactor 1 entering the regulating tank 9, the heat exchange unit includes an outer shell 41 with a hollow cylindrical structure and a baffle structure 42 located inside the outer shell, the outer shell 41 includes a transparent outer shell 411, the interior of the transparent outer shell 411 is a transparent inner tube 413 coated with a photothermal conversion material, a vacuum layer 412 is formed between the transparent outer shell 411 and the transparent inner tube 413, a liquid inlet 43 is provided on one bottom surface of the outer shell 41, and a liquid outlet 44 is provided on the other bottom surface, and the liquid inlet 43 and the liquid outlet 44 are both located in the transparent inner tube 413; the baffle structure 42 includes a threaded tubular baffle 421 and an aluminum foil reflective layer 422 fixedly connected to the outer surface of the baffle 421; the axis of the baffle 421 is located below the liquid inlet 43.

[0019] like Figure 1 As shown, the present invention also provides a cold region sewage treatment device, comprising a bioreactor 1, a liquid inlet pipeline, two or more heat exchange units 4 and a regulating tank 9, wherein the heat exchange unit 4 is fixedly connected to the cover plate of the bioreactor 1, the outlet pipe 10 of the bioreactor 1 or the tap water inlet pipe 7 is connected to the liquid inlet pipeline, the liquid inlet pipeline comprises a liquid inlet pipe 3 and a liquid outlet pipe 11, the liquid inlet port 43 is connected to the liquid inlet pipe 3, the liquid outlet port 44 is connected to the liquid outlet pipe 11, the liquid outlet pipe 11 is connected to the regulating tank 9, and the regulating tank 9 is connected to the bioreactor 1.

[0020] In some embodiments, a T-shaped slide groove 8 is provided on the cover plate of the bioreactor 1 , and a T-shaped sliding block is fixedly connected to the outer surface of the transparent shell 411 and installed in the T-shaped slide groove 8 .

[0021] In some embodiments, a lift pump 2 is installed on the liquid inlet pipe 3 at the connection with the bioreactor 1 to smoothly allow the tail water in the bioreactor 1 to enter the liquid inlet 43 .

[0022] In some embodiments, a flow control valve 5 is provided at the liquid inlet 43 and the liquid outlet 44 of each heat exchange unit 4 .

[0023] In the utility model, the transparent inner tube 413 is coated with a photothermal conversion material, which converts the absorbed solar energy into thermal energy. The light transmitted into the heat exchange unit is re-reflected by the aluminum foil reflective layer 422 of the baffle 421 onto the photothermal conversion material of the transparent inner tube 413. At the same time, the baffle 421 can also enhance the turbulence of the fluid in the device, enhance the mass transfer and heat transfer inside the device, and the vacuum layer 412 can reduce heat loss and improve the thermal insulation performance of the device.

[0024] In the present invention, the photothermal conversion material is a common carbon-based material, metal-based nanoparticles, inorganic semiconductor materials, etc.

[0025] In the utility model, the tail water of the bioreactor 1 can be used as the inlet water of the heat exchange unit 4. Temperature sensors 6 are respectively arranged before and after the heat exchange unit 4 to monitor the inlet and outlet temperatures. A regulating tank 9 is arranged after the heat exchange unit 4 to mix the heated water and the raw sewage for conditioning. When the amount of tail water from the bioreactor 1 is too small or the water quality is poor, water can be supplied to the heat exchange unit 4 through the tap water inlet pipe 7. The baffle 421 in each unit is placed in the outer shell 41 of the device, and its upper and lower ends are respectively placed at the center of the upper and lower sides. The amount of hot water and the water supply temperature provided to the bioreactor 1 can be controlled by adjusting the water inlet amount of the photothermal reactor and the number of units of the photothermal reactor through which water flows.

[0026] In the utility model, the transparent inner tube 413 is placed in the acrylic transparent outer shell 411 in a nested form, and the gap formed between the two is set as a vacuum layer 412. The angle between two adjacent triangular threads of the baffle 421 is 30-60°, and the surface of the triangular thread is set as a tightly fitting aluminum foil reflective layer 422.

[0027] In the utility model, the tail water or tap water in the bioreactor 1 is introduced into the heat exchange unit 4 by the lifting pump 2. The water enters from the liquid inlet 43 of the first heat exchange unit, flows into the heat-absorbing transparent inner tube 413 along the top of the baffle 421 and gradually fills up, flows through the transparent inner tube 413 and is heated by the heat energy converted by solar energy, and finally flows out from the liquid outlet 44 of the last photothermal conversion reactor at a higher temperature. The heated water is mixed with the raw sewage in the regulating tank 9, and the sewage at a suitable temperature is returned to the bioreactor 1 for treatment. The device is set in a simple way in the sewage treatment system, and heats the sewage treatment facilities in cold areas in a simple way, helping to improve quality and efficiency with green and low-carbon methods.

[0028] The transparent inner tube 413 of the present invention has a high light-to-heat conversion efficiency, and can convert the absorbed solar energy into heat energy, thereby transferring the heat energy to the water inside the device through mass transfer, thereby increasing the temperature of the water. In addition, the vacuum layer 412 between the transparent outer shell 411 made of acrylic material and the transparent inner tube 413 with heat absorption function plays a role in heat preservation.

[0029] The aluminum foil reflective layer 422 on the surface of the baffle 421 in the utility model can reflect the light transmitted into the reactor back to the heat-absorbing transparent inner tube 413, and continue to convert it into heat energy. In addition, the special structure of the baffle 421 helps to increase the turbulence in the device, enhance the mass transfer process, and further help to increase the temperature of the water.

[0030] In the present utility model, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0032] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A baffled solar thermal converter, characterized in that: The invention comprises two or more heat exchange units (4), wherein the heat exchange units (4) are connected in parallel to the liquid inlet pipeline of the bioreactor (1) entering the regulating tank (9), wherein the heat exchange units comprise an outer shell (41) with a hollow cylindrical structure and a baffle structure (42) located inside the outer shell, wherein the outer shell (41) comprises a transparent outer shell (411), wherein the interior of the transparent outer shell (411) is a transparent inner tube (413) coated with a photothermal conversion material, wherein the transparent outer shell (411) and the transparent inner tube (413) are provided with a transparent inner tube (413) coated with a photothermal conversion material. A vacuum layer (412) is formed between the inner tubes (413); a liquid inlet (43) is provided on one bottom surface of the outer shell (41); a liquid outlet (44) is provided on the other bottom surface; the liquid inlet (43) and the liquid outlet (44) are both located inside the transparent inner tube (413); the baffle structure (42) comprises a threaded tube-shaped baffle plate (421) and a reflective layer (422) fixedly connected to the outer surface of the baffle plate (421); and the axis of the baffle plate (421) is located below the liquid inlet (43).

2. A cold region sewage treatment device, characterized in that: It comprises the baffled solar thermal converter as claimed in claim 1, a bioreactor (1), a liquid inlet pipeline and a regulating tank (9), wherein the heat exchange unit (4) of the baffled solar thermal converter is fixedly connected to the cover plate of the bioreactor (1), the outlet pipe (10) of the bioreactor (1) or the tap water inlet pipe (7) is connected to the liquid inlet pipeline, the liquid inlet pipeline comprises a liquid inlet pipe (3) and a liquid outlet pipe (11), the liquid inlet port (43) is connected to the liquid inlet pipe (3), the liquid outlet port (44) is connected to the liquid outlet pipe (11), the liquid outlet pipe (11) is connected to the regulating tank (9), and the regulating tank (9) is connected to the bioreactor (1).

3. The cold region sewage treatment device according to claim 2, characterized in that: The cover plate of the bioreactor (1) is provided with a T-shaped slide groove (8), and the outer surface of the transparent shell (411) is fixedly connected with a T-shaped sliding block installed in the T-shaped slide groove (8).

4. The cold region sewage treatment device according to claim 2, characterized in that: A lifting pump (2) is installed on the liquid inlet pipe (3) at the connection point with the bioreactor (1), and is used to smoothly allow the tail water in the bioreactor (1) to enter the liquid inlet (43).

5. The cold region sewage treatment device according to claim 2, characterized in that: A flow control valve (5) is provided at the liquid inlet (43) and the liquid outlet (44) of each heat exchange unit (4).

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