A biomass energy and solar energy coupled kitchen wastewater treatment system

Abstract

The application discloses a kind of biomass energy and solar energy coupling's kitchen wastewater treatment system, it is related to the field of biomass energy, including waste treatment module, photovoltaic photo-thermal module, biomass power generation module and wastewater purification module, the wastewater purification module is purified to the wastewater of wastewater heating water tank, light heat, photoelectricity and biomass energy are integrated, wastewater can be maximized to be treated;Treated wastewater can be used as water source of livestock industry, for livestock drinking, cleaning facilities or irrigating feed crops, realize the recycling of water resources;Biogas and electricity can be used as energy, further reduce energy cost, economic benefit is more remarkable;Stable structure, no moving parts, low maintenance cost;Wastewater reuse is part of the sustainable development strategy of livestock industry, help to reduce the negative impact on the environment, while maintaining the economic vitality of livestock industry.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of biomass energy, in particular to a kind of biomass energy and solar coupling kitchen wastewater treatment system. BACKGROUND

[0002] With the acceleration of urbanization process, the improvement of people's living standards, the scale of catering industry is expanding, kitchen garbage is increasing. Kitchen wastewater is mainly from various canteens, restaurants and other food processing places, these wastewater contains high concentration of oil, suspended solids and organic matter. These organic matters if not treated directly discharged into the environment will cause serious pollution to water body, decomposition in the natural environment will also pollute the environment, affect the quality of life of residents, therefore, it is particularly important to kitchen waste water and treatment. In this case, it is urgent to get high efficiency and environmentally clean kitchen wastewater treatment system.

[0003] Solar energy is inexhaustible, clean energy. Therefore, combined with solar photovoltaic technology, learn from and transform traditional mature sewage treatment process, adapt to the characteristics of solar energy, strengthen the treatment of nitrogen and phosphorus, improve the efficiency and depth of sewage treatment, develop new full-automatic kitchen sewage treatment technology, which is reasonable, therefore, a kind of biomass energy and solar coupling kitchen wastewater treatment system is needed to solve the above problems. SUMMARY

[0004] To solve the above technical problems, the present application provides the following technical solutions:

[0005] A kind of biomass energy and solar coupling kitchen wastewater treatment system, including waste treatment module, the waste treatment module includes mixed water tank, anaerobic heater, waste tank, coarse filter and wastewater heating water tank, the mixed water tank pipeline connects anaerobic heater, the anaerobic heater contains a variety of anaerobic bacteria and its bottom waste flows into waste tank, the upper layer of wastewater flows into wastewater heating water tank, the waste tank pipeline connects coarse filter, and the organic fertilizer is obtained after the waste treatment of coarse filter;

[0006] Including photovoltaic photothermal module, the photovoltaic photothermal module includes solar collector, the solar collector is connected and heats anaerobic heater and wastewater heating water tank;

[0007] Including biomass power generation module, the biomass power generation module is connected with anaerobic heater and wastewater heating water tank, the biomass power generation module provides electric energy to heat the wastewater in wastewater heating water tank, and the biogas generated by the anaerobic heater provides fuel for the biomass power generation module;

[0008] It also includes wastewater purification module, and the wastewater purification module purifies the wastewater of wastewater heating water tank to output pure water.

[0009] Preferably, the biomass power generation module comprises, in sequence, a biogas extraction pump connected to an anaerobic heater for extracting biogas, a raw biogas storage tank, a water washing device, a clean biogas storage tank, a boiler, and a heat exchanger, the clean biogas storage tank is further connected to a low-temperature separation device, the low-temperature separation device is connected to a compressed biomethane storage, the compressed biomethane storage is connected to the boiler, the boiler is further connected to a turbine, the turbine is connected to a first water pump and a generator, the first water pump is connected to the heat exchanger, and the heat exchanger is connected to a wastewater heating water tank.

[0010] Preferably, the wastewater purification module comprises, in sequence, a high-temperature TC device, a second water pump, a first valve, a first flow meter, a DCMD membrane module, a first TC device, and a clean water tank, the high-temperature TC device is connected to the wastewater heating water tank, and a low-temperature TC device is arranged between the DCMD membrane module and the wastewater heating water tank.

[0011] Preferably, the clean water tank is connected, in sequence, to a third water pump, a second valve, a second flow meter, a second TC device, and the DCMD membrane module, and the water permeated through the DCMD membrane module flows into the clean water tank through the first TC device.

[0012] Preferably, the pipe wall of the DCMD membrane module is made of a porous membrane and connected to the inside of the module through a base.

[0013] Advantages of the present application:

[0014] 1. The present application integrates light heat, photoelectricity and biomass energy, and can maximize the treatment of wastewater;

[0015] 2. The treated wastewater can be used as a water source for livestock, for livestock drinking, cleaning facilities or irrigating feed crops, realizing the recycling of water resources;

[0016] 3. The produced biogas and electricity can be used as energy, further reducing energy costs and achieving more significant economic benefits;

[0017] 4. The structure is stable and does not contain moving parts, and the maintenance cost is low;

[0018] 5. The reuse of wastewater is part of the sustainable development strategy of livestock farming, which helps to reduce the negative impact on the environment while maintaining the economic vitality of livestock farming. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 The figure is a structural schematic diagram of the present application;

[0020] Fig. 2 The figure is a schematic diagram of the DCMD membrane module of the present application;

[0021] Fig. 3 A cross-sectional view of the DCMD membrane module of the present application.

[0022] Wherein: 1, mixed water tank; 2, anaerobic heater; 3, biogas extraction pump; 4, raw biogas storage tank; 5, water washing device; 6, clean biogas storage tank; 7, low-temperature separation device; 8, compressed biogas storage tank; 9, boiler; 10, turbine; 11, generator; 12, No. 1 water pump; 13, waste tank; 14, coarse filter; 15, solar heat collector; 16, waste water heating tank; 17, high-temperature TC device; 18, No. 2 water pump; 19, No. 1 valve; 20, No. 1 flow meter; 21, DCMD membrane module; 22, low-temperature TC device; 23, No. 1 TC device; 24, No. 2 TC device; 25, No. 2 flow meter; 26, No. 2 valve; 27, No. 3 water pump; 28, clean water tank; 29, heat exchanger; 30, organic fertilizer; 31, pure water; 32, base; 33, porous membrane. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application will be further described below in conjunction with specific embodiments.

[0024] As shown in Figs. 1 to 3 A kitchen waste water treatment system coupled with biomass energy and solar energy, comprising a waste treatment module, the waste treatment module comprising a mixed water tank 1, an anaerobic heater 2, a waste tank 13, a coarse filter 14 and a waste water heating tank 16, the mixed water tank 1 being connected to the anaerobic heater 2, the anaerobic heater 2 containing a plurality of anaerobic bacteria and the waste at the bottom flowing into the waste tank 13; the anaerobic bacteria taking the waste as an electron donor, decomposing organic matter into low molecular weight products through endogenous enzyme catalytic reaction, and generating methane in anoxic environment to produce biogas; the waste water at the top flowing into the waste water heating tank 16, the waste tank 13 being connected to the coarse filter 14, and the coarse filter 14 obtaining organic fertilizer 30 after treating the waste;

[0025] comprising a photovoltaic-photothermal module, the photovoltaic-photothermal module comprising a solar heat collector 15, the solar heat collector 15 being connected to and heating the anaerobic heater 2 and the waste water heating tank 16, and heating the waste water by using solar energy;

[0026] comprising a biomass power generation module, the biomass power generation module being connected to the anaerobic heater 2 and the waste water heating tank 16, the biomass power generation module providing electric energy to heat the waste water in the waste water heating tank 16, and the biogas produced by the anaerobic heater 2 providing fuel for the biomass power generation module;

[0027] The waste water purification module purifies the waste water of the waste water heating tank 16 to produce pure water 31. The anaerobic heater 2 processes the waste into biogas, waste water and waste, and connects the biogas and the waste water to the biomass power generation module and the waste water purification module respectively through pipes.

[0028] In this embodiment, the biomass power generation module comprises, in sequence, a biogas extraction pump 3 connected to the anaerobic heater 2 to extract biogas, a raw biogas storage tank 4, a water washing device 5, a clean biogas storage tank 6, a boiler 9, a heat exchanger 29, the clean biogas storage tank 6 further connected to a low-temperature separation device 7, the low-temperature separation device 7 connected to a compressed biogenic methane storage 8, the compressed biogenic methane storage 8 connected to the boiler 9, the boiler 9 further connected to a turbine 10, the turbine 10 connected to a first water pump 12 and a generator 11, the first water pump 12 connected to the heat exchanger 29, and the heat exchanger 29 connected to a waste water heating tank 16. The heat exchanger 29 contains a hot pipe and a cold pipe, with high-temperature fluid passing through the hot pipe and low-temperature fluid passing through the cold pipe.

[0029] The biogas is pumped into the raw biogas storage tank 4 by the biogas extraction pump 3, and then cleaned by water washing. The cleaned biogas after water washing is introduced into the clean biogas storage tank 6, part of which is stored in the compressed methane storage 8 after the low-temperature separation device 7 as supplemental fuel for power generation when the system energy is insufficient, and the other part is used as fuel to generate superheated steam. The boiler 9 uses biogas as fuel to generate superheated steam, which expands in the turbine 10 to drive the generator 11 to work and thus generate electric energy, which can be stored in a battery pack to provide electric energy for heating the anaerobic heater 2 and the waste water heating tank 16 in the case of insufficient solar radiation. At the same time, part of the steam is collected by the first water pump 12 and pumped into the heat exchanger 29, where it is condensed and then returned to the boiler 9 for recycling.

[0030] In this embodiment, the waste water purification module comprises, in sequence, a high-temperature TC device 17 connected to the waste water heating tank 16, a second water pump 18, a first valve 19, a first flow meter 20, a DCMD membrane module 21, a first TC device 23, and a clean water tank 28, with a low-temperature TC device 22 provided between the DCMD membrane module 21 and the waste water heating tank 16.

[0031] A first flow meter 20 and a first valve 19 are provided in front of the DCMD membrane module 21, which can be automatically controlled to close when the first flow meter 20 measures that the inflow of waste water meets the standard.

[0032] In the embodiment, the clean water tank 28 is connected with the third water pump 27, the second valve 26, the second flow meter 25, the second TC device 24 and the DCMD membrane module 21 in sequence, and the water permeated through the DCMD membrane module 21 flows into the clean water tank 28 through the first TC device 23.

[0033] In the embodiment, the pipe wall of the DCMD membrane module 21 is made of a porous membrane 33. The DCMD membrane module 21 has two layers of membranes for filtering wastewater, and is divided into three parts. The base 32 is connected to the side wall in the DCMD module 21 and serves as a connection and support.

[0034] When the temperature of the wastewater in the feed channel is higher than the permeate flow in the permeate channel of the DCMD membrane module 21, there is a difference in vapor pressure between the whole DCMD membrane module 21. Therefore, water vapor is formed near the hot side of the membrane, and passes through the porous medium, and the hot wastewater flow provides the required heat energy for evaporation, and the water vapor is condensed by transferring its latent heat to the permeate flow in the cold channel, and is condensed on the permeate side of the DCMD membrane module 21. The evaporation and condensation processes result in the formation of a thermal boundary layer along the membrane.

[0035] The wastewater is extracted from the wastewater heating tank 16 and circulated in the feed loop of the treatment system. After the temperature of the wastewater is detected by the high-temperature TC device 17, the wastewater reaches the DCMD membrane module 21, and the wastewater cooled by permeation through the DCMD membrane module 21 is returned to the wastewater heating tank 16 after being detected by the low-temperature TC device 22. The cold water is pumped into the cold channel by the first TC device 23, flows out of the DCMD membrane module 21 at a higher temperature, and is returned to the clean water tank 28 by the second TC device 24. The process is repeated until the wastewater in the wastewater heating tank 16 is treated, and thus pure water 31 is obtained from the wastewater.

[0036] Through the above process, the waste is treated to obtain organic fertilizer 30 and pure water 31, and the process uses a combination of solar energy and biomass energy to generate electricity, which is green and environmentally friendly.

[0037] It is to be understood by those skilled in the art that the present application can be implemented by other embodiments without departing from the spirit or essential characteristics thereof. Therefore, the above disclosed embodiments are merely illustrative in all aspects and are not the only ones. All changes within the scope of the present application or within the equivalent scope of the present application are intended to be included in the present application.

Claims

1. A system for treating food waste water by coupling biomass energy with solar energy, characterized in that, The waste treatment module comprises a mixed water tank (1), an anaerobic heater (2), a waste tank (13), a coarse filter (14) and a waste water heating water tank (16), the mixed water tank (1) is connected with the anaerobic heater (2) by pipeline, the anaerobic heater (2) contains various anaerobic bacteria and the bottom layer of the waste flows into the waste tank (13), the upper layer of the waste water flows into the waste water heating water tank (16), the waste tank (13) is connected with the coarse filter (14) by pipeline, and the coarse filter (14) obtains organic fertilizer (30) after treating the waste; The photovoltaic-photothermal module comprises a solar heat collector (15), which is connected with and heats the anaerobic heater (2) and the waste water heating water tank (16). The biomass power generation module is connected with the anaerobic heater (2) and the waste water heating water tank (16), the biomass power generation module provides electric energy to heat the waste water in the waste water heating water tank (16), and the biogas generated by the anaerobic heater (2) provides fuel for the biomass power generation module. The waste water purification module purifies the waste water of the waste water heating water tank (16) to output pure water (31). The waste water purification module comprises a high-temperature TC device (17), a second water pump (18), a first valve (19), a first flow meter (20), a DCMD membrane module (21), a first TC device (23) and a clean water tank (28) connected in sequence, the high-temperature TC device (17) is connected with the waste water heating water tank (16), and a low-temperature TC device (22) is arranged between the DCMD membrane module (21) and the waste water heating water tank (16). The clean water tank (28) is connected with a third water pump (27), a second valve (26), a second flow meter (25), a second TC device (24) and the DCMD membrane module (21) in sequence, and the water permeated through the DCMD membrane module (21) flows into the clean water tank (28) through the first TC device (23).

2. The system according to claim 1, wherein the system is characterized in that: The biomass power generation module comprises a biogas extraction pump (3), an original biogas storage tank (4), a water washing device (5), a clean biogas storage tank (6), a boiler (9) and a heat exchanger (29) connected in sequence, the biogas extraction pump (3) is connected with the anaerobic heater (2) to extract biogas, the clean biogas storage tank (6) is further connected with a low-temperature separation device (7), the low-temperature separation device (7) is connected with a compressed biomethane storage device (8), the compressed biomethane storage device (8) is connected with the boiler (9), the boiler (9) is further connected with a turbine (10), the turbine (10) is connected with a first water pump (12) and a generator (11), the first water pump (12) is connected with the heat exchanger (29), and the heat exchanger (29) is connected with the waste water heating water tank (16).

3. The system according to claim 1, wherein the system further comprises a biomass energy and solar energy coupling device. The pipeline wall of the DCMD membrane module (21) is made of a porous membrane (33) connected in the module by a base (32).

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