阅读说明：本技术 一种用于畜禽粪沼气池沼气提纯的过滤装置 (A filter equipment for purification of animal manure methane-generating pit marsh gas ) 是由 牛晓君 李霞 张荔 叶兴瑶 刘洋 彭绍洪 王雅婷 余成华 于 2019-10-31 设计创作，主要内容包括：本发明公开了一种用于畜禽粪沼气池沼气提纯的过滤装置,其特征在于,主要包括外壳,所述外壳的内部从下至上依次设置有第一滤室、第二滤室和第三滤室；所述外壳顶部开设有出气管且出气管与第三滤室相连通,外壳底部侧面开设有进气管,外壳底部另一侧开设有排水管,所述第一滤室内设置有多跟净化管,且所述每个净化管的两端分别与进气管和第二滤室连通；所述第二滤室和第三滤室通过中间设置的连通管相连通,操作简单,净化纯度高,适合广泛推广。(The invention discloses a filtering device for purifying biogas in a livestock and poultry manure biogas digester, which is characterized by mainly comprising a shell, wherein a first filtering chamber, a second filtering chamber and a third filtering chamber are sequentially arranged in the shell from bottom to top; the top of the shell is provided with an air outlet pipe which is communicated with the third filter chamber, the side surface of the bottom of the shell is provided with an air inlet pipe, the other side of the bottom of the shell is provided with a water outlet pipe, a plurality of purification pipes are arranged in the first filter chamber, and two ends of each purification pipe are respectively communicated with the air inlet pipe and the second filter chamber; the second filter chamber and the third filter chamber are communicated through a communicating pipe arranged in the middle, so that the operation is simple, the purification purity is high, and the method is suitable for wide popularization.)

1. A filtering device for purifying biogas of a livestock and poultry manure biogas digester is characterized by mainly comprising a shell (1), wherein a first filtering chamber (4), a second filtering chamber (3) and a third filtering chamber (2) are sequentially arranged in the shell (1) from top to bottom;

an air outlet pipe (12) is arranged at the top of the shell (1), the air outlet pipe (12) is communicated with the third filtering chamber (2), an air inlet pipe (17) is arranged on one side of the bottom of the shell (1), a booster pump (13) is arranged at the air inlet of the air inlet pipe (17), a drain pipe (11) is arranged on the other side of the bottom of the shell (1), and the drain pipe (11) is communicated with a water collecting pipe (16) arranged at the bottom of the first filtering chamber (4);

a plurality of purifying pipes (41) which are communicated with the air inlet pipe (17) and the second filtering chamber (3) are arranged in the first filtering chamber (4) in parallel;

the filter is characterized in that a second filter pool (31) and a third filter pool (21) are respectively arranged in the second filter chamber (3) and the third filter chamber (2), the second filter pool (31) and the third filter pool (21) are respectively contained in respective liquid containing boxes (22), a liquid exchange pipe (24) is respectively arranged at the bottom of each liquid containing box (22), and the second filter chamber (3) and the third filter chamber (2) are communicated through a communicating pipe (15) arranged in the middle.

2. The filtering device for biogas purification of livestock and poultry manure biogas digester as claimed in claim 1, characterized in that one side of the housing (1) is provided with an access door (14) at the position of each filter chamber, and both sides of the third filter chamber (2) are provided with access doors (14).

3. The filtering device for biogas purification of livestock and poultry manure biogas digester as claimed in claim 1, characterized in that an activated carbon layer (121) is arranged in the outlet pipe (12).

4. A filter device for biogas purification of livestock and poultry manure biogas digester as claimed in claim 1, wherein the purification pipe (41) comprises a vent pipe (411), a filter layer (412) and a membrane (413), the vent pipe (411) is a passage separated by the filter layer (412) through the membrane (413) arranged in the middle, and the bottom end of the filter layer (412) is communicated with the water outlet pipe (42).

5. A filter arrangement for biogas purification in livestock and poultry manure biogas digesters according to claim 4, characterized in that the pipe path of the cleaning pipe (41) is helical.

6. The filtering device for biogas purification of livestock and poultry manure biogas digester as claimed in claim 1, wherein the filtering material in the second filtering tank (31) is ferric oxide, and a zeolite layer (32) is laid on the bottom of the second filtering tank (31), and the air outlets of the plurality of breather pipes (411) are buried in the zeolite layer (32).

7. The filtering device for biogas purification of livestock and poultry manure biogas digester as claimed in claim 1, characterized in that a plurality of iron oxide layers are arranged in the communicating pipe (15).

8. The filtering device for biogas purification of livestock and poultry manure biogas digester as claimed in claim 1, characterized in that the third filter tank (2) is filled with sodium hydroxide solution, and the gas outlet pipe (12) is provided with an activated carbon layer (121).

9. The filtering device for biogas purification of livestock and poultry manure biogas digester as claimed in claim 1, characterized in that the third filtering chamber (2) is provided with vibrators (23) on both sides of the bottom of the liquid containing box (22).

Technical Field

The invention relates to the technical field of biogas purification and filtration, in particular to a filtering device for biogas purification of a livestock and poultry manure biogas digester.

Background

Biogas is a combustible gas with a high calorific value, mainly comprising methane and carbon dioxide and a small amount of hydrogen (H)₂) Oxygen (O)₂) Hydrogen sulfide (H)₂S) and the like, compared with other fuel gases, the methane has better anti-explosion performance, is a good clean fuel, and is mostly used for heating, cooking and lighting in the prior art. With the increasing of the output of the biogas, the middle and high end utilization ways of the biogas are expanded, and the purification and filtration of the biogas are the hot subjects of the current research.

The existing biogas purification and filtration methods mainly comprise an absorption method, a pressure swing adsorption method, a low-temperature condensation method and a membrane separation method, wherein the equipment cost and the operation cost of the pressure swing adsorption method and the membrane separation method are higher, the technology of the low-temperature condensation method is not mature at present, and the absorption method is suitable for being used in the field.

The existing absorption method mainly adsorbs impurity gases in the biogas through adsorption materials such as active carbon, zeolite and the like, improves the purity by reacting solution with gases in the biogas, and finally dries and stores the biogas, so that the biogas has high resource consumption and time consumption caused by water vapor during filtration, the filtration efficiency is not high, and the device structure occupies a large area.

Disclosure of Invention

In order to solve the technical problem, the invention provides a filtering device for purifying biogas of a livestock and poultry manure biogas digester.

The technical points of the invention are as follows:

a filtering device for purifying biogas of a livestock and poultry manure biogas digester mainly comprises a shell, wherein a first filtering chamber, a second filtering chamber and a third filtering chamber are sequentially arranged in the shell from bottom to top;

an air outlet pipe is arranged at the top of the shell and communicated with the third filtering chamber, an air inlet pipe is arranged on one side of the bottom of the shell, a booster pump is arranged at the air inlet of the air inlet pipe, a drain pipe is arranged on the other side of the bottom of the shell and communicated with a water collecting pipe arranged at the bottom of the first filtering chamber;

a plurality of purifying pipes communicated with the air inlet pipe and the second filter chamber are arranged in the first filter chamber in parallel;

the second filter chamber and the third filter chamber are respectively internally provided with the second filter chamber and the third filter chamber, the second filter chamber and the third filter chamber are respectively contained in respective liquid containing boxes, the bottom of each liquid containing box is provided with a liquid changing pipe, and the second filter chamber and the third filter chamber are communicated through a communicating pipe arranged in the middle.

Furthermore, an access door is arranged at the position of each filter chamber on one side of the shell, and the access doors are arranged on the two sides of the third filter chamber, so that later maintenance is facilitated.

Furthermore, an activated carbon layer is arranged in the air outlet pipe, so that incomplete purification is prevented.

Furthermore, the purification pipe comprises a vent pipe, a filter layer and a diaphragm, wherein the vent pipe is a channel separated by the filter layer through the diaphragm arranged in the middle, and the bottom end of the filter layer is communicated with a water outlet pipe to preliminarily remove water molecules in the methane.

Furthermore, the pipeline path of the purification pipe is spiral, so that the methane is fully contacted with the filter layer, and the filtering effect is ensured.

Furthermore, the filter material is ferric oxide in the second filter tank, and a zeolite layer is laid at the bottom of the second filter tank, and the air outlets of the plurality of vent pipes are buried in the zeolite layer, so that the methane purification effect is ensured.

Further, a sodium hydroxide solution is filled in the third filter tank to extract carbon dioxide in the biogas.

Furthermore, the oscillators are arranged on two sides of the bottom of the liquid containing box in the third filter chamber, so that the reaction is more sufficient, and the filtering efficiency is higher.

Compared with the prior art, the invention has the beneficial effects that:

firstly, a first filter chamber, a second filter chamber and a third filter chamber are sequentially arranged in the shell from bottom to top, the first filter chamber enables the biogas to enter a spirally rotating purification pipe through a booster pump for first filtering and dehydration, so that water vapor in the biogas does not react with components in two post-positioned filter chambers, and the difficulty and time of subsequent filtering are reduced; the biogas purified from the first filter chamber is further adsorbed by the zeolite layer at the bottom of the second filter chamber and then enters the iron oxide tank to remove hydrogen sulfide in the biogas, and then enters the third filter chamber through the multi-layer iron oxide layer of the communicating pipe, so that the unreacted hydrogen sulfide gas is prevented from entering the third filter chamber, and the oscillator arranged in the third filter chamber enables the carbon dioxide in the biogas to react with the sodium hydroxide solution more fully.

Secondly, the invention has reasonable structural design and small occupied area, can reduce energy consumption and shorten purification and filtration time, and is worthy of being popularized and applied in a large scale.

Drawings

FIG. 1 is a front view of the internal structural schematic of the present invention;

FIG. 2 is a front view of the external structural schematic of the present invention;

fig. 3 is a schematic view of the inner structure of the purification tube of the present invention.

The device comprises a shell, a water outlet pipe, a 111, a control valve, a 12, an air outlet pipe, a 121, an activated carbon layer, a 13, a booster pump, a 14, an access door, a 15, a communicating pipe, a 16, a water collecting pipe, a 17, an air inlet pipe, a 2, a third filter chamber, a 21, a third filter chamber, a 22, a liquid containing box, a 23, an oscillator, a 24, a liquid changing pipe, a 3, a second filter chamber, a 31, a second filter chamber, a 32, a zeolite layer, a 4, a first filter chamber, a 41, a purifying pipe, a 411, a vent pipe, a 412, a filter layer, a 413, a diaphragm, a 42 and.

Detailed Description