CN213171734U

CN213171734U - Device for separating and concentrating biogas slurry

Info

Publication number: CN213171734U
Application number: CN202021363576.1U
Authority: CN
Inventors: 戴启洲; 邱宗炼; 陈建孟
Original assignee: Zhejiang University of Technology ZJUT
Current assignee: Zhejiang University of Technology ZJUT
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2021-05-11
Anticipated expiration: 2030-07-13

Abstract

A device for separating and concentrating biogas slurry comprises a biogas slurry storage barrel, an ultrafiltration membrane component, a constant-temperature water bath kettle, a reverse osmosis membrane component, a first beaker and a second beaker, wherein a water outlet of the biogas slurry storage barrel is communicated with a water inlet of the ultrafiltration membrane component through a first diaphragm pump, and a concentrated water outlet of the ultrafiltration membrane component is communicated with a water inlet of the biogas slurry storage barrel; a first beaker is arranged in the constant-temperature water bath, a filtered water outlet of the ultrafiltration membrane component is communicated with the first beaker, and the first beaker is also communicated with a water inlet of the reverse osmosis membrane component through a second diaphragm pump; and a water purification outlet of the reverse osmosis membrane component is communicated with the second beaker. The utility model discloses a sewage treatment process of coupled membrane that ultrafiltration, reverse osmosis combined together has improved the sewage treatment effect, has reduced reverse osmosis membrane's pollution.

Description

Device for separating and concentrating biogas slurry

Technical Field

The utility model relates to an environmental protection effluent treatment plant field especially relates to a device that is used for natural pond liquid separation and concentration.

Background

With the increasing demand for food worldwide, the scale of the livestock industry is also expanding day by day. But the breeding process can cause the discharge of a large amount of livestock and poultry manure, and the ecological environment can be seriously damaged if the livestock and poultry manure is not treated or is not treated properly. Meanwhile, the traditional industrial standard-reaching treatment does not meet the actual situation of rural areas due to the cost problem. Therefore, the method for recycling the livestock and poultry manure is explored, and the method has extremely important practical significance for increasing the agricultural value and promoting the healthy development of the breeding industry while harmlessly treating the livestock and poultry manure to reduce the influence of the livestock and poultry manure on the ecological environment. The biogas fermentation engineering is widely applied as a mainstream livestock and poultry manure recycling technology, but with the gradual large-scale and intensive development of the biogas engineering, a large amount of biogas slurry cannot be timely consumed, and the development of the biogas engineering is negatively influenced. Aiming at the problems of large volume, difficult transportation, low concentration of nutrient substances, difficult recycling and the like of biogas slurry generated in biogas fermentation engineering, an effective way needs to be explored to promote the further development of the biogas engineering. In recent years, reverse osmosis membrane technology is widely applied to the fields of seawater desalination, resource recovery and the like due to its stable and efficient interception capability, and meanwhile, a research hotspot for concentrating biogas slurry by using reverse osmosis membrane is focused on recycling biogas slurry. However, the reverse osmosis membrane has high requirements on the quality of inlet water, and if the pretreatment is not proper, the membrane pollution problem is serious. Therefore, the application of the reverse osmosis membrane technology in the field of biogas slurry recovery can be enhanced by finding a suitable pretreatment technology. Ultrafiltration is a relatively mature membrane treatment technique with pore sizes of about 0.001-0.02 μm and a molecular weight cut-off of 1000-300000 (Da). The device can remove larger solid particles, but has lower retention rate for small molecular organic matters with smaller molecular weight and salt. The conventional ultrafiltration system has the problems of easy blockage, easy growth of microorganisms on the surface of the membrane and the like.

Disclosure of Invention

In order to overcome the problems, the utility model provides a device for separating and concentrating biogas slurry.

The utility model adopts the technical proposal that: a device for separating and concentrating biogas slurry comprises a biogas slurry storage barrel, an ultrafiltration membrane component, a constant-temperature water bath, a reverse osmosis membrane component, a first beaker and a second beaker;

a water outlet of the biogas slurry storage barrel is communicated with a water inlet of the ultrafiltration membrane component through a first pipeline, and a first rotor flowmeter, a first diaphragm pump, a first regulating valve and a first pressure gauge are sequentially arranged on the first pipeline along the water flow direction;

a concentrated water outlet of the ultrafiltration membrane component is communicated with a water inlet of the biogas slurry storage barrel through a second pipeline, so that concentrated water of the ultrafiltration membrane component flows back into the biogas slurry storage barrel, and a second rotameter is arranged on the second pipeline;

a first beaker is arranged in the constant-temperature water bath pot, and a thermometer is arranged in the first beaker; a filtered water outlet of the ultrafiltration membrane component is communicated with the first beaker through a third pipeline, and the third pipeline is sequentially provided with a second regulating valve and a third rotameter along the water flow direction;

the first beaker is also communicated with a water inlet of the reverse osmosis membrane component through a fourth pipeline, and a third regulating valve, a second diaphragm pump and a second pressure gauge are sequentially arranged on the fourth pipeline along the water flow direction;

a concentrated water outlet of the reverse osmosis membrane assembly is communicated with a fourth pipeline through a fifth pipeline, the joint of the fifth pipeline and the fourth pipeline is positioned between a third regulating valve and a second diaphragm pump, so that concentrated water of the reverse osmosis membrane assembly flows back to the fourth pipeline, and a fourth rotor flow meter and a fourth regulating valve are arranged on the fifth pipeline along the water flow direction;

and a purified water outlet of the reverse osmosis membrane component is communicated with a second beaker for collecting purified water through a sixth pipeline, and a fifth rotameter is arranged on the sixth pipeline.

Furthermore, the ultrafiltration membrane material adopted in the ultrafiltration membrane component is polytetrafluoroethylene.

Further, the reverse osmosis membrane adopted in the reverse osmosis membrane component is a polyamide composite membrane.

The utility model has the advantages that: compared with the independent ultrafiltration and reverse osmosis membrane technology, the coupling technology not only can obtain better treatment effect, but also can reduce the pressure on the membrane. The process for treating sewage by using the coupled membrane combining ultrafiltration and reverse osmosis solves the problem of insufficient removal of dissolved substances by ultrafiltration. In addition, the polytetrafluoroethylene ultrafiltration has better stain resistance and anti-blocking functions, can be used for pretreatment of reverse osmosis, improves the sewage treatment effect and reduces the pollution of reverse osmosis membranes.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Description of reference numerals: 1. a biogas slurry storage barrel; 21. a first diaphragm pump; 22. a second diaphragm pump; 3. an ultrafiltration membrane module; 41. a first beaker; 42. a second beaker; 5. a constant-temperature water bath kettle; 6. a reverse osmosis membrane module; 71. a first rotor flowmeter; 72. a second rotameter; 73. a third rotameter; 74. a fourth rotameter; 75. a fifth rotameter; 81. a first pressure gauge; 82. a second pressure gauge; 91. a first regulating valve; 92. a second regulating valve; 93. a third regulating valve; 94. a fourth regulating valve; 10. a thermometer.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., appear based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to the attached drawings, the device for separating and concentrating biogas slurry comprises a biogas slurry storage barrel 1, an ultrafiltration membrane component 3, a constant-temperature water bath 5, a reverse osmosis membrane component 6, a first beaker 41 and a second beaker 42; specifically, the ultrafiltration membrane material adopted in the ultrafiltration membrane component 3 is polytetrafluoroethylene, and the reverse osmosis membrane adopted in the reverse osmosis membrane component 6 is a polyamide composite membrane;

the water outlet of the biogas slurry storage barrel 1 is communicated with the water inlet of the ultrafiltration membrane component 3 through a first pipeline, and a first rotor flowmeter 71, a first diaphragm pump 21, a first regulating valve 91 and a first pressure gauge 81 are sequentially arranged on the first pipeline along the water flow direction; a concentrated water outlet of the ultrafiltration membrane component 3 is communicated with a water inlet of the biogas slurry storage barrel 1 through a second pipeline, so that the concentrated water of the ultrafiltration membrane component 3 flows back to the biogas slurry storage barrel 1, and a second rotameter 72 is arranged on the second pipeline;

a first beaker 41 is arranged in the constant-temperature water bath 5, and a thermometer 10 is arranged in the first beaker 41; a filtered water outlet of the ultrafiltration membrane component 3 is communicated with the first beaker 41 through a third pipeline, and the third pipeline is sequentially provided with a second regulating valve 92 and a third rotameter 73 along the water flow direction;

the first beaker 43 is also communicated with a water inlet of the reverse osmosis membrane assembly 6 through a fourth pipeline, and a third regulating valve 93, a second diaphragm pump 22 and a second pressure gauge 82 are sequentially arranged on the fourth pipeline along the water flow direction;

a concentrated water outlet of the reverse osmosis membrane assembly 6 is communicated with a fourth pipeline through a fifth pipeline, the joint of the fifth pipeline and the fourth pipeline is positioned between the third regulating valve 93 and the second diaphragm pump 22, so that the concentrated water of the reverse osmosis membrane assembly 6 flows back to the fourth pipeline, and the fifth pipeline is provided with a fourth rotor flow meter 74 and a fourth regulating valve 94 along the water flow direction;

and a purified water outlet of the reverse osmosis membrane component 6 is communicated with a 42 second beaker for collecting purified water through a sixth pipeline, and a fifth rotameter 75 is arranged on the sixth pipeline.

In the whole biogas slurry separation and concentration process, the flow of the biogas slurry is measured by the pressure gauge through the operating pressure of the ultrafiltration and reverse osmosis membrane filtration processes. The biogas slurry temperature is measured by a thermometer. The rotameter measures, the flow size is controlled by the regulating valve.

The specific experimental process is as follows:

firstly, placing the biogas slurry in a biogas slurry storage barrel 1 for precipitation pretreatment. Then, the first diaphragm pump 21 and the second diaphragm pump 22 are started, the biogas slurry in the biogas slurry storage barrel 1 is pumped to the ultrafiltration membrane module 3 for filtration, the concentrated water of the ultrafiltration membrane module 3 flows back to the biogas slurry storage barrel 1, the filtrate of the ultrafiltration membrane module 3 enters the first beaker 4 and then the pH of the filtrate is adjusted, wherein the pH of the biogas slurry is adjusted by hydrochloric acid with the concentration of 1% and sodium hydroxide solution, and all the used medicines are analytically pure. And finally, adjusting the temperature of the biogas slurry in the first beaker to 26 ℃ by using a constant-temperature water bath device 5, and maintaining the temperature of the biogas slurry by controlling the room temperature and adding water into a constant-temperature water bath kettle in the concentration process. Finally, the filtrate passing through the ultrafiltration membrane module 3 is pumped to the reverse osmosis membrane apparatus 6 using the second diaphragm pump 22 for separation and concentration, and the operating pressure is adjusted to 1MPa during the reverse osmosis membrane concentration.

The embodiments described in this specification are merely illustrative of implementations of the inventive concepts, and the scope of the invention should not be considered limited to the specific forms set forth in the embodiments, but rather the scope of the invention is intended to include equivalent technical means as would be understood by those skilled in the art from the inventive concepts.

Claims

1. The utility model provides a device that is used for natural pond liquid separation and concentration which characterized in that: comprises a biogas slurry storage barrel, an ultrafiltration membrane component, a constant-temperature water bath, a reverse osmosis membrane component, a first beaker and a second beaker;

2. The device for biogas slurry separation and concentration as claimed in claim 1, wherein: the ultrafiltration membrane material adopted in the ultrafiltration membrane component is polytetrafluoroethylene.

3. The device for biogas slurry separation and concentration as claimed in claim 1, wherein: the reverse osmosis membrane adopted in the reverse osmosis membrane component is a polyamide composite membrane.