CN209815887U - Biogas slurry high-power concentration system - Google Patents
Biogas slurry high-power concentration system Download PDFInfo
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- CN209815887U CN209815887U CN201920502319.2U CN201920502319U CN209815887U CN 209815887 U CN209815887 U CN 209815887U CN 201920502319 U CN201920502319 U CN 201920502319U CN 209815887 U CN209815887 U CN 209815887U
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Abstract
The utility model relates to a natural pond liquid high power concentrated system, including filter equipment, membrane enrichment facility and low temperature vacuum evaporation device, filter equipment with membrane enrichment facility passes through the tube coupling and will be through filterable filtrate carry extremely among the membrane enrichment facility, membrane enrichment facility with low temperature vacuum evaporation device passes through the tube coupling and carries extremely with the concentrate after the concentration carry out low temperature vacuum evaporation among the low temperature vacuum evaporation device. The utility model discloses a filtration, membrane concentration and low temperature vacuum evaporation combine to handle natural pond liquid, can not make partial material in the natural pond liquid take place chemical reaction, can make a large amount of the profitable material of crops growth that contain in the natural pond liquid, for example nitrogen, phosphorus, potassium, sulphur, calcium, zinc, all kinds of humic acid and amino acid etc. obtain remaining.
Description
Technical Field
The utility model relates to a biogas slurry treatment related technical field, concretely relates to biogas slurry high-power concentration system.
Background
In recent years, China vigorously popularizes large and medium-sized biogas projects to solve the problem of environmental pollution caused by breeding manure, the breeding manure can generate biogas after anaerobic treatment, resource utilization is achieved, and a large amount of biogas slurry is generated at the same time. Due to the intensification of modern breeding, biogas slurry is concentrated, the distance from a fertilizing farmland is long, the transportation cost of the biogas slurry is high, and effective reduction treatment on the biogas slurry is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to prior art not enough, provide a natural pond liquid high power concentrated system.
The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a natural pond liquid high power concentrated system, includes filter equipment, membrane enrichment facility and low temperature vacuum evaporation device, filter equipment with membrane enrichment facility passes through the tube coupling and will pass through filterable filtrate and carry to among the membrane enrichment facility, membrane enrichment facility with low temperature vacuum evaporation device passes through the tube coupling and carries to concentrated concentrate among the low temperature vacuum evaporation device carries out low temperature vacuum evaporation.
The utility model has the advantages that: the utility model discloses a filtration, membrane concentration and low temperature vacuum evaporation combine to handle natural pond liquid, can not make partial material in the natural pond liquid take place chemical reaction, can make a large amount of the profitable material of crops growth that contain in the natural pond liquid, for example nitrogen, phosphorus, potassium, sulphur, calcium, zinc, all kinds of humic acid and amino acid etc. obtain remaining.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the system also comprises a warming water tank, wherein the warming water tank is connected between the membrane concentration device and the low-temperature vacuum evaporation device; and the membrane concentration device conveys the concentrated solution after concentration to the warming water tank for warming, and the warming water tank conveys the concentrated solution after warming to the low-temperature vacuum evaporation device for low-temperature vacuum evaporation.
The beneficial effect of adopting the further scheme is that: the temperature raising water tank can raise the temperature of the concentrated solution in advance, improve the evaporation efficiency of the low-temperature vacuum evaporation device and greatly reduce the energy consumption.
Further, an air/water source heat pump and a temperature sensor are arranged in the warming water pool.
The beneficial effect of adopting the further scheme is that: the air/water source heat pump is adopted to regulate and control the water temperature in the heating water tank, the efficiency is high, the energy consumption is low, compared with the traditional electric heating technology, the efficiency is improved by about 3 times, and the energy consumption is greatly reduced.
Further, the filtering device comprises a sand filter and/or a disc filter and/or an MBR filter which are independently arranged or sequentially arranged in series.
The beneficial effect of adopting the further scheme is that: the multistage filtering equipment is adopted to filter the biogas slurry, so that the finally obtained biogas slurry fertilizer has few impurities, and an effective supporting premise is provided for the subsequent production processes of concentration, evaporation and the like.
Further, an aeration device is installed at the bottom of the MBR filter.
The beneficial effect of adopting the further scheme is that: the aeration device is arranged at the bottom of the MBR filter, so that impurities attached to the MBR filter can be effectively removed, and the service life of the filtering membrane is prolonged.
The device further comprises a back washing device, the back washing device is connected with the filtering device and is used for back washing the filtering device, a pressure detection device is installed on the pipeline, and a back washing pump and/or a valve are/is installed in the back washing device; the pressure detection device and the backwashing pump and/or the valve are respectively connected with the second controller.
The beneficial effect of adopting the further scheme is that: the arrangement of the back washing device can carry out back washing on the filtering device according to the pressure difference, thereby prolonging the service life of the filtering device.
Further, the membrane concentration device adopts 3-5 times of concentration times to concentrate the filtrate.
The beneficial effect of adopting the further scheme is that: the filtrate is concentrated by adopting the concentration multiple of 3-5 times, the economy is better, and the separated clear water obtained after concentration can reach the national second-level discharge standard and can be used for cleaning water for farms or water for farmland irrigation.
The liquid level detection device is characterized by further comprising a temporary storage tank, wherein a liquid level detection device is installed in the temporary storage tank; the temporary storage pool is also connected with an input pipeline, and a first delivery pump is installed on the input pipeline; the temporary storage pool is connected with the filtering device through an output pipeline, and a second delivery pump is installed on the output pipeline.
The beneficial effect of adopting the further scheme is that: the setting of the temporary storage pool can temporarily store the biogas slurry in the temporary storage pool, so that sufficient raw materials are provided for the operation of subsequent equipment.
Further, the liquid level detection device, the first delivery pump and the second delivery pump are respectively connected with a third controller.
The beneficial effect of adopting the further scheme is that: the liquid level in the temporary storage pool is utilized to control the start and stop of the first conveying pump and the second conveying pump, so that a continuous production mode can be realized, and the energy consumption is effectively saved.
Drawings
FIG. 1 is a schematic view of the flow structure of the biogas slurry high-power concentration system of the present invention;
fig. 2 is the process flow schematic diagram of the biogas slurry high-power concentration system of the utility model.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a temporary storage pool; 11. a liquid level detection device; 12. a first delivery pump; 13. a second delivery pump; 14. an input pipe; 15. an output pipe; 2. a sand filter; 3. a disc filter; 4. an MBR filter; 41. an aeration device; 5. a membrane concentration device; 6. a temperature-increasing water tank; 7. an air/water source heat pump; 8. a low temperature vacuum evaporation device; 9. back flushing the pipeline; 91. a backwash pump; 10. and a pressure detection device.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the illustrated embodiments are provided to explain the present invention and not to limit the scope of the invention.
As shown in fig. 1 and fig. 2, the high power concentration system for biogas slurry of the present embodiment includes a filtering device, a membrane concentration device 5 and a low temperature vacuum evaporation device 8, wherein the filtering device is connected to the membrane concentration device 5 through a pipeline and delivers the filtered filtrate to the membrane concentration device 5, and the membrane concentration device 5 is connected to the low temperature vacuum evaporation device 8 through a pipeline and delivers the concentrated concentrate to the low temperature vacuum evaporation device 8 for low temperature vacuum evaporation.
By adopting the system, more than 95% of water in the original biogas slurry can be recycled, and water resources are saved. Meanwhile, because the system is concentrated at high power, the concentration of more than 20 times can be realized, the proportion of a large amount of, medium amount of and trace elements such as various amino acids, nitrogen, phosphorus, potassium, sulfur, calcium, zinc and the like in the concentrated solution is mostly improved, and the concentrated solution produced by the system is used for preparing fertilizer or directly used as the fertilizer for crop planting, so that the transportation cost and the fertilizer application amount can be greatly reduced.
The embodiment adopts the combination of filtration, membrane concentration and low-temperature vacuum evaporation to treat the biogas slurry, so that part of substances in the biogas slurry can not be subjected to chemical reaction, a large amount of substances beneficial to crop growth, such as nitrogen, phosphorus, potassium, sulfur, calcium, zinc, various humic acids, amino acids and the like, contained in the biogas slurry can be retained, and the finally obtained biogas slurry fertilizer has high nutritive value.
As shown in fig. 1, the high concentration system of biogas slurry of this embodiment further includes a warming water tank 6, wherein the warming water tank 6 is connected between the membrane concentration device 5 and the low-temperature vacuum evaporation device 8; the membrane concentration device 5 conveys the concentrated solution after concentration to the warming water tank 6 for warming, and the warming water tank 6 conveys the concentrated solution after warming to the low-temperature vacuum evaporation device 8 for low-temperature vacuum evaporation. The temperature raising water tank can raise the temperature of the concentrated solution in advance, improve the evaporation efficiency of the low-temperature vacuum evaporation device and greatly reduce the energy consumption.
As shown in fig. 1, an air/water source heat pump 7 and a temperature sensor are disposed in the warming water tank 6 of the present embodiment, and the present embodiment can manually control the opening or closing of the air/water source heat pump 7 according to the temperature collected by the temperature sensor. The air/water source heat pump 7 can also be automatically controlled, specifically, the air/water source heat pump 7 and the temperature sensor are respectively connected with a first controller, and the air/water source heat pump 7 heats the concentrated solution in the warming water tank 6; the first controller controls the temperature sensor to collect temperature information of the concentrated solution and convert the temperature information into a temperature value, the air/water source heat pump 7 is closed when the temperature value reaches a first preset temperature value, and the air/water source heat pump 7 is started when the temperature value is smaller than or equal to a second preset temperature value; wherein the first preset temperature value is larger than the second preset temperature value. The air/water source heat pump is adopted to regulate and control the water temperature in the heating water tank, the efficiency is high, the energy consumption is low, compared with the traditional electric heating technology, the efficiency is improved by about 3 times, and the energy consumption is greatly reduced. The first preset temperature value is 40 ℃, the second preset temperature value can be 35 ℃, in addition, other temperature values lower than 40 ℃ can also be selected, such as 38 ℃, 30 ℃ and the like, and the temperature of 35 ℃ is naturally selected for comprehensive consideration of economy and efficiency.
In the low-temperature vacuum evaporation device 8 of the embodiment, the evaporation temperature of the concentrated solution is 40 ℃, and the concentrated solution is subjected to low-temperature vacuum evaporation to obtain concentrated biogas slurry 18-22 times. The concentrated solution is evaporated at an evaporation temperature of 40 ℃, so that the loss of active ingredients in the biogas slurry is reduced as little as possible, and redundant moisture is evaporated while chemical reaction of substances is not caused. Traditional multiple-effect evaporation technology needs to heat feed liquid temperature to more than 70 ℃, and this can lead to some material to take place chemical reaction in the natural pond liquid, causes the loss of some beneficial substance, and the low temperature vacuum evaporation technique is selected for use to this embodiment, controls feed liquid temperature at 40 ℃ once, can realize not causing the material to take place chemical reaction when, evaporates unnecessary moisture.
Because the biogas slurry generated after the anaerobic fermentation of the culture manure contains large-particle impurities and partial jelly, the substances can seriously affect the service life of rear-end equipment if not treated, and the application of products in the later period can also be adversely affected. As shown in fig. 1, the filtering apparatus of the present embodiment includes a sand filter 2 and/or a disc filter 3 and/or an MBR filter 4, which are independently arranged or sequentially arranged in series. The multistage filtering equipment is adopted to filter the biogas slurry, so that the finally obtained biogas slurry fertilizer has few impurities, and an effective supporting premise is provided for the subsequent production processes of concentration, evaporation and the like.
The sandstone filter adopts quartz sand with different granularities as a filtering material to intercept large particles and jelly in the biogas slurry, and a filtering disc material in the disc filter can intercept medium and small particles again, so that the precision of the discharged biogas slurry can reach 200 meshes through the two filtering devices, and the application requirements of equipment such as spray irrigation, drip irrigation and the like are basically met. The sand filter is also called a quartz sand filter, mainly uses sand as a filtering material, is a filter which forms a sand bed by using quartz sand with uniform particle size as a filtering carrier to carry out three-dimensional filtration, and is commonly used for primary filtration. As shown in fig. 1, the sand filter of the present embodiment includes a filter body, a first quartz sand layer and a second quartz sand layer, wherein the first quartz sand layer is located above the second quartz sand layer, and the particle size of the first quartz sand layer is smaller than the particle size of the second quartz sand layer. The quartz sand of big granule is located the bottom, and the quartz sand of tiny granule is located the upper strata, and when the stoste got into sand filter, the stoste was earlier through the quartz sand layer of large granule, with the interception of large granule impurity, gets into the quartz sand layer of tiny granule again, with the interception of tiny particle impurity.
As shown in fig. 1, an aeration device 41 is installed at the bottom of the MBR filter 4 of the present embodiment. The MBR filter of this embodiment adopts MBR hollow fiber membrane to carry out the fine filtration, and the filtrate after the filtration can enter membrane concentration device. The MBR filter only adopts the filtering function of an MBR hollow fiber membrane, and does not need to culture biological bacteria on the membrane for biochemical treatment. MBR filter fineness is high, installs aeration equipment in MBR filter bottom moreover, can effectively get rid of the impurity of adhering to on the MBR filter, prolongs filtration membrane's life.
As shown in fig. 1, the present embodiment further includes a back-washing device, the back-washing device is connected to the filtering device and performs back-washing on the filtering device, a pressure detecting device 10 is installed on the pipeline, and a back-washing pump 91 and/or a valve are installed in the back-washing device; according to the embodiment, the opening or closing of the backwashing pump and/or the valve can be manually controlled according to the pressure value detected by the pressure detection device, and the opening or closing of the backwashing pump and/or the valve can also be automatically controlled. Specifically, the pressure detection device 10 and the backwash pump 91 and/or the valve are respectively connected to a second controller, the pressure detection device 10 sends a detected pressure value to the second controller, and the second controller controls the backwash pump 91 and/or the valve to be opened or closed according to a pressure difference between the front and the back of the filter device. The arrangement of the back washing device can carry out back washing on the filtering device according to the pressure difference, thereby prolonging the service life of the filtering device. The backwashing device comprises a backwashing pipeline 9, the backwashing pipeline 9 is divided into three branch pipes which are respectively communicated with the sand filter 2, the disc filter 3 and the MBR filter 4, the backwashing pipeline 9 is used for introducing clean water to the upper ends of the sand filter 2, the disc filter 3 and the MBR filter 4 to backwash the filtering devices, valves are respectively arranged on the three branch pipes, and whether the branch pipes are communicated or not is controlled by controlling the opening and closing of the valves.
The preferred filtering device of the present embodiment is a structure in which three filters, i.e., a sand filter, a disc filter and an MBR filter, are connected in series. The device comprises a sand filter, a disc filter, a MBR filter, a back-washing pump, a first controller, a back-washing pump, a second controller, a pressure detection device and a pressure detection device, wherein the front-end pipeline of the sand filter and the back-end pipeline of the MBR filter are respectively provided with the pressure detection device, the pipeline between the sand filter and the disc filter is also provided with the pressure detection device, when the filter material in the filter devices is partially blocked due to excessive attached impurities, the front end and the back end of the filter material can generate pressure difference, the pressure values are fed back through the pressure detection device, the back. The back washing device of the embodiment has short back washing time, cannot influence the system operation and normal production, and reduces the workload of personnel maintenance.
The membrane concentration device 5 of the present embodiment is configured to concentrate the filtrate by using a concentration factor of 3 to 5 times, and preferably, by using a concentration factor of 4 times. The membrane concentration device adopts nanofiltration or reverse osmosis membrane materials. The filtrate is concentrated by adopting the concentration multiple of 3-5 times, the economy is better, and the separated clear water obtained after concentration can reach the national second-level discharge standard and can be used for cleaning water for farms or water for farmland irrigation.
As shown in fig. 1, the high concentration system for biogas slurry of this embodiment further includes a temporary storage tank 1, and a liquid level detection device 11 is installed in the temporary storage tank 1; the temporary storage tank 1 is also connected with an input pipeline 14, and a first delivery pump 12 is arranged on the input pipeline 14; the temporary storage pool 1 is connected with the filtering device through an output pipeline 15, and a second delivery pump 13 is installed on the output pipeline 15. The setting of the temporary storage pool can temporarily store the biogas slurry in the temporary storage pool, so that sufficient raw materials are provided for the operation of subsequent equipment.
Wherein, the volume of the temporary storage pool 1 is the handling capacity of front-end equipment for half an hour for emergency treatment.
This embodiment can be according to the start-stop of the liquid level value manual control two delivery pumps that liquid level detection device detected, also can the start-stop of two delivery pumps of automatic control. Specifically, the liquid level detection device, the first delivery pump 12 and the second delivery pump 13 of the present embodiment are respectively connected to a third controller; the third controller controls the liquid level detection device 11 to collect liquid level information in the temporary storage tank 1 and convert the liquid level information into a liquid level value, and when the liquid level value reaches a first preset value, the second conveying pump 13 is controlled to operate; when the liquid level value reaches a second preset value, controlling the first delivery pump 12 to stop running, and controlling the second delivery pump 13 to maintain running; when the liquid level value is less than or equal to a third preset value, controlling the second delivery pump 13 to stop running; wherein the second preset value is larger than the first preset value and larger than the third preset value. The middle position of the temporary storage pool can be selected as the first preset value, the position, close to the top, of the temporary storage pool can be selected as the second preset value, and the position, close to the bottom, of the temporary storage pool can be selected as the third preset value. The liquid level in the temporary storage pool is utilized to control the start and stop of the first conveying pump and the second conveying pump, so that a continuous production mode can be realized, and the energy consumption is effectively saved.
The working flow of the high-power biogas slurry concentration system in the embodiment is that, as shown in fig. 1 and fig. 2, biogas slurry is input into the temporary storage tank through the first conveying pump, the first conveying pump continuously works, when the liquid level of the biogas slurry in the temporary storage tank reaches a first preset value (namely, the middle position in the height direction of the temporary storage tank), the second conveying pump starts to operate, the biogas slurry in the temporary storage tank is conveyed to the bottom of the sand filter, at the moment, the first conveying pump and the second conveying pump operate simultaneously, when the liquid level of the biogas slurry in the temporary storage tank reaches a second preset value (namely, the position close to the top end in the height direction of the temporary storage tank), the first conveying pump is closed, only the second conveying pump operates, and the biogas slurry in the temporary storage tank is prevented from overflowing; when the liquid level of the biogas slurry in the temporary storage tank is lowered to a third preset value (namely the position close to the bottom in the height direction of the temporary storage tank), the second conveying pump is closed, the first conveying pump is opened, the biogas slurry is not conveyed into the filtering device at the moment, the biogas slurry is input into the temporary storage tank, and the operation is circulated. The biogas slurry enters from the bottom of the sand filter, is discharged from the top after being filtered by the sand filter and enters the bottom of the disc filter, then enters the MBR filter after being discharged from the top of the disc filter, is filtered by the MBR filter and enters the membrane concentration device for membrane concentration, a concentrated solution formed after the membrane concentration enters the temperature-increasing water pool, clear water separated out in the membrane concentration process can be directly used for irrigation and the like to be discharged, the concentrated solution is heated to 40 ℃ in the temperature-increasing water pool through an air/water source heat pump, the concentrated solution after the temperature increase enters the low-temperature vacuum evaporation device for low-temperature vacuum evaporation, the evaporation amount is controlled to be 80% of the feed liquid, and finally the concentrated biogas slurry of about 20 times is obtained.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. The high-power biogas slurry concentration system is characterized by comprising a filtering device, a membrane concentration device and a low-temperature vacuum evaporation device, wherein the filtering device is connected with the membrane concentration device through a pipeline and conveys filtered filtrate to the membrane concentration device, and the membrane concentration device is connected with the low-temperature vacuum evaporation device through a pipeline and conveys concentrated concentrate to the low-temperature vacuum evaporation device for low-temperature vacuum evaporation.
2. The high power biogas slurry concentration system of claim 1, further comprising a warming water tank connected between the membrane concentration device and the low temperature vacuum evaporation device; and the membrane concentration device conveys the concentrated solution after concentration to the warming water tank for warming, and the warming water tank conveys the concentrated solution after warming to the low-temperature vacuum evaporation device for low-temperature vacuum evaporation.
3. The high power biogas slurry concentration system of claim 2, wherein an air/water source heat pump and a temperature sensor are arranged in the warming water tank.
4. The high concentration system of biogas slurry according to any one of claims 1 to 3, wherein the filtering device comprises a sand filter and/or a disc filter and/or an MBR filter which are arranged independently or in series.
5. The high power concentration system of biogas slurry according to claim 4, wherein an aeration device is installed at the bottom of the MBR filter.
6. The biogas slurry high-power concentration system according to any one of claims 1 to 3 and 5, further comprising a back washing device, wherein the back washing device is connected with the filtering device and used for back washing the filtering device, a pressure detection device is installed on the pipeline, and a back washing pump and/or a valve are/is installed in the back washing device.
7. The biogas slurry high-power concentration system of claim 6, wherein the pressure detection device and the back-washing pump and/or the valve are respectively connected with the second controller.
8. The high-power biogas slurry concentration system according to any one of claims 1 to 3 and 7, wherein the membrane concentration device is used for concentrating the filtrate by adopting a concentration factor of 3-5 times.
9. The high concentration system of biogas slurry according to any one of claims 1 to 3 and 7, further comprising a temporary storage tank, wherein a liquid level detection device is installed in the temporary storage tank; the temporary storage pool is also connected with an input pipeline, and a first delivery pump is installed on the input pipeline; the temporary storage pool is connected with the filtering device through an output pipeline, and a second delivery pump is installed on the output pipeline.
10. The high concentration system of biogas slurry according to claim 9, wherein the liquid level detection device, the first delivery pump and the second delivery pump are respectively connected with a third controller.
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| CN109912100A (en) * | 2019-04-12 | 2019-06-21 | 北京天极视讯科技发展有限公司 | A kind of biogas slurry high power concentration systems |
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