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Graded filtering and steam combined backwashing device for biogas liquid irrigation

A technology of grading filtration and backwashing, applied in filtration separation, filtration loop, separation method, etc., can solve the problems of undesigned trash rack and grading filtration, unsatisfactory backwashing effect, unsatisfactory filtration effect, etc., and achieves compact structure. , Improve the filtering effect and facilitate the effect of backflushing and reflux

Active Publication Date: 2014-04-02
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mesh filter is filtered by nylon mesh or stainless steel wire mesh with small holes. It is mainly used to filter dirt such as powder, sand and scale in irrigation water. Although it can also filter irrigation water containing a small amount of organic matter, when impurities , especially when the content of organic impurities is high, it is easy to be blocked
The organic impurity content and composition of the biogas slurry vary according to the raw material and fermentation degree and other factors, but the effect of a single mesh filter on the biogas slurry is poor, and it is often necessary to clean or replace the filter
[0004] At present, the relevant technologies related to biogas slurry filtration devices are only seen in the "biogas slurry filter" (patent application number: 200910084985.X) applied by Jiang Weijie and Yu Hongjun. The filter is relatively simple, with only one mesh filter and no blocking Sewage grid and graded filtration, the filtration effect is not ideal when the impurity content and composition of the biogas slurry change greatly, and the backwashing effect is not ideal when there are many fibrous organic impurities

Method used

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  • Graded filtering and steam combined backwashing device for biogas liquid irrigation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: (Two-group biogas slurry irrigation grading filtration and water-gas combined backwashing device 1)

[0024] The two-group device includes a grading trash tank system, a water and liquid inlet system, a laminated mesh filter group system, and a water-gas combined backwash system, wherein the grading trash tank system is set in the biogas slurry In tank 1, the system is composed of a trash blocking box 2, a trash floating plate 3, a filter gate A4 with 15 meshes, and a filter gate B5 with 50 meshes. The trash floating plate 3. It is used to intercept the floating matter in the biogas slurry tank, and it can float up and down with the rise and fall of the water surface. The filter screen gate A4 is used to intercept impurities and organic debris above 1mm in the biogas slurry tank, and the filter screen gate B5 is used to intercept The impurities and tiny substances above 0.3mm in the biogas slurry tank can be extracted out of the biogas slurry tank for cleaning a...

Embodiment 2

[0035] Example 2: (Three-group biogas slurry irrigation grading filtration and water-gas combined backwash device 2)

[0036] In this example, the combined filter has a filtering capacity of 15t / h; a motor water pump with a water output of 15t / h and a head of 40m is configured. The air compressor refers to the two-group configuration, and the filter gate A4 of the hierarchical trash tank system The mesh number is 18, and the mesh number of the filter gate B5 is 55; the laminated mesh filter group is added to the two groups in Example 1 based on the irrigation volume requirements, and a total of 3 groups are set; the rest The water and liquid inlet system and the water-gas combined backwashing system are constructed with reference to the components and structures of Example 1; the operation of irrigation and dirt removal can also be carried out by referring to the principles and procedures of Example 1; for backwashing, two Group water supply and group cleaning are carried out in ...

Embodiment 3

[0037] Example 3: (Four-group biogas slurry irrigation grading filtration and water-gas combined backwash device 3)

[0038] In this example, the mesh size of the filter gate A4 of the hierarchical trash tank system is 20, and the mesh number of the filter gate B5 is 60; the laminated mesh filter group is set to 4 groups according to the demand of irrigation volume; configuration The motor water pump with a water output of 20t / h and a head of 40m, and an air compression pump with a pressure of 5bar and an air supply of 600L / M. The rest of the water and liquid system and the water-gas combined backwash system refer to Example 1 The components and structures of the slab are assembled; the operation of irrigation and dirt removal can refer to the principles and procedures of Embodiment 1; when backwashing, the two groups of water supply and the two groups of cleaning are alternately performed.

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Abstract

The invention discloses a graded filtering and steam combined backwashing device for biogas liquid irrigation, belonging to the technical field of an irrigation filtering device. The graded filtering and steam combined backwashing device comprises a graded feculence-blocking box system, a water inlet and liquid inlet system, a laminated type and net type filter group system, a steam combined backwashing system and the like. According to the graded filtering and steam combined backwashing device provided by the invention, a laminated type filter and a net type filter are combined to form a filter group to be used as a double-filtering device of biogas liquid, so that not only the filtering efficiency can be improved, but also the backwashing is convenient to implement; a steam combined washing function is combined, so that the working efficiency of the graded filtering and steam combined backwashing device is further improved and the graded filtering and steam combined backwashing device is not easy to block. The graded filtering and steam combined backwashing device provided by the invention has the characteristics of simple and reasonable structure, high filtering and washing efficiency, low investment cost, convenience for maintenance and the like. The graded filtering and steam combined backwashing device provided by the invention can be popularized and applied in the field of the biogas liquid irrigation.

Description

Technical field [0001] The invention relates to the technical field of irrigation filtering devices, in particular to a combined backwashing device for filtering and water-gas irrigation of biogas slurry. Background technique [0002] With the continuous development of the aquaculture industry, the amount of biogas liquid discharged from the pasture through the fermentation of biogas slurry tanks is also increasing. If a large amount of biogas liquid cannot be used rationally, it will easily cause environmental pollution, and among them, the biogas liquid can be used in farmland. The digestion and utilization of biogas slurry is one of the best ways to solve the problem of biogas slurry, but this requires related supporting engineering facilities. Among them, the spray drip irrigation technology is the best means to improve the utilization of biogas slurry. However, due to the rich organic impurities contained in the biogas slurry, the drip irrigation of the liquid is more prone ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D36/02B01D35/16
Inventor 陈喜靖姜丽娜奚辉许育新
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES