CN113998780B - Heating device of anaerobic methane tank and use method thereof - Google Patents

Abstract

The invention discloses a heating device of an anaerobic methane tank, which comprises a methane generator set, a tail gas exhaust system, a heat exchange system, an aeration system, a heating system and a transition tank, wherein the tail gas exhaust system comprises an exhaust pipe and a smoke purification component, two ends of the exhaust pipe are respectively communicated with one end of the methane generator set and one end of the smoke purification component, the other end of the smoke purification component is communicated with the heat exchange system, the other end of the heat exchange system is communicated with one end of the aeration system and one end of the heating system in parallel, the heating system and the aeration system are both arranged in the transition tank, and the transition tank is communicated with the anaerobic methane tank. The invention collects the waste heat of the biogas generator set, heats the sewage by utilizing the waste heat, improves the biogas production efficiency of the biogas generated by the subsequent anaerobic fermentation, meets the requirement of biogas power generation users on the utilization of waste heat resources, reduces the consumption of the anaerobic biogas digester on energy sources, further realizes energy conservation and emission reduction, saves the utilization resources and maximizes the utilization of the resources.

Description

Heating device of anaerobic methane tank and use method thereof

Technical Field

The invention relates to the technical field of energy utilization of biogas digester, in particular to a heating device of an anaerobic biogas digester and a use method thereof.

Background

The use of biogas for power generation becomes an important measure for saving the cost of large-scale livestock farms. The energy distribution in the biogas power generation process of the livestock and poultry farm is as follows: about 33% of electricity generation, about 32% of smoke exhaust, about 19% of high-temperature water, about 6% of low-temperature water and about 10% of other energy loss. In theory, 90% of the waste heat of the generator set can be effectively utilized, but the utilization rate of the waste heat of most biogas generator sets in China is extremely low, and only the waste heat of a few biogas power plants is used for meeting the heat requirement of the self production process or heating a building, and the waste heat of the rest biogas power plants is discharged into the air.

The direct evacuation of waste heat not only wastes valuable energy, but also causes thermal pollution to the environment. Therefore, recycling waste heat generated in the biogas power generation process is one of important ways for solving the energy problem in livestock farms.

The common practice of the anaerobic fermentation process of the manure of the poultry farm is a normal-temperature fermentation mode, the anaerobic digestion effect of the mode on the sewage is poor, the biogas production effect is not ideal, and especially for the anaerobic fermentation process adopting a black film biogas digester, the anaerobic fermentation effect of the anaerobic fermentation process is further improved by exogenous heating, and meanwhile, the biogas production is promoted to a certain extent. At present, the black film methane tank is universally heated by adopting an external source, and an independent heat source is required to be provided for continuously heating sewage, so that the consumption of the black film methane tank on energy sources is improved. Therefore, development of a heating device of an anaerobic methane tank and a use method thereof are needed, so that energy consumption of the anaerobic methane tank is reduced, energy conservation and emission reduction are further realized, resources are saved, and maximization of resource utilization is realized.

Disclosure of Invention

The invention aims to provide a heating device of an anaerobic methane tank and a use method thereof.

According to one aspect of the invention, a heating device of an anaerobic methane tank is provided, which comprises a methane generator set, a tail gas exhaust system, a heat exchange system, an aeration system, a heating system and a transition tank, wherein the tail gas exhaust system comprises an exhaust pipe and a smoke purification component, two ends of the exhaust pipe are respectively communicated with one end of the smoke purification component and the methane generator set, the other end of the smoke purification component is communicated with the heat exchange system, the other end of the heat exchange system is communicated with one end of the aeration system and one end of the heating system in parallel, the heating system and the aeration system are both arranged in the transition tank, and the transition tank is communicated with the anaerobic methane tank.

The invention has the beneficial effects that: the heating device provided by the invention purifies the flue gas generated by the methane generator set by arranging the tail gas emission system, filters the smoke dust in the flue gas, is convenient for the subsequent utilization of the waste heat of the flue gas, and is provided with the heat exchange system for heating the air by utilizing the waste heat of the flue gas, which is the first heat exchange; the sewage treatment device is provided with a heating system, an aeration system and a heating pool, the heated air is utilized to heat and aerate sewage in the heating pool, the second heat exchange and the third heat exchange are realized, the sewage is heated and aerate by utilizing the waste heat of flue gas through the three heat exchange processes, the subsequent sewage is convenient to enter the anaerobic methane tank to carry out anaerobic fermentation treatment, and the methane production effect of fermentation is improved. The waste heat of the biogas generator set is collected and utilized, the waste heat is utilized to heat sewage, the biogas production efficiency of biogas generated by subsequent anaerobic fermentation is improved, the utilization of waste heat resources by biogas power generation users is met, the consumption of energy sources by the anaerobic biogas digester is reduced, the energy conservation and emission reduction are further realized, the utilization resources are saved, and the maximization of the resource utilization is realized.

In some embodiments, the smoke purifying component comprises a first smoke inlet pipe, a first smoke outlet pipe, a purifying box body and a double-layer filter plate, wherein the first smoke inlet pipe and the first smoke outlet pipe are respectively positioned at the left side and the right side of the purifying box body and are respectively communicated with the purifying box body, the double-layer filter plate is inserted in the purifying box body, two ends of the exhaust pipe are respectively communicated with the methane generator set and the first smoke inlet pipe, the first smoke outlet pipe is communicated with the heat exchange system, and a first heat preservation layer is arranged outside the purifying box body. The exhaust pipe is used for conveying flue gas generated by the biogas generator set to the first flue gas inlet pipe, the first flue gas inlet pipe is used for conveying the flue gas from the exhaust pipe into the purifying box body, the double-layer filter plate is used for filtering the flue gas and removing smoke dust in the flue gas, and the first flue gas outlet pipe is used for conveying the purified flue gas into the heat exchange system. The first heat preservation is used for keeping warm to purifying the box, avoids the waste heat loss of tail gas, prevents simultaneously because of purifying the overheated and scald user of box.

In some embodiments, the front of the double-layer filter plate is provided with a high temperature resistant filter screen, the back of the double-layer filter plate is provided with a high temperature resistant filter cloth, the upper part of the double-layer filter plate is provided with a pull ring, the pull ring is positioned on the outer side of the purifying box body, the number of the double-layer filter plates is three, and the three double-layer filter plates are parallel to each other and uniformly distributed in the purifying box body along the direction from the first flue gas inlet pipe to the first flue gas outlet pipe. In the purifying box body, smoke passes through the high-temperature resistant filter screen and the high-temperature resistant filter cloth in sequence, smoke dust is deposited between the high-temperature resistant filter screen and the high-temperature resistant filter cloth, when the double-layer filter plate needs to be replaced, the double-layer filter plate is taken out from the purifying box body through the pull ring, and the new double-layer filter plate is replaced. Three filter plates are arranged, so that the flue gas can be subjected to multiple filtration.

In some embodiments, the heat exchange system comprises a second flue gas inlet pipe, a second flue gas outlet pipe, an air coil pipe, a heat exchange box body, an air inlet pipe, an air outlet pipe and a slow fan, wherein the heat exchange box body is provided with a flue gas inlet and a flue gas outlet, the air coil pipe is arranged in the heat exchange box body, one end of the air coil pipe is communicated with one end of the air inlet pipe, the other end of the air coil pipe is communicated with one end of the air outlet pipe, one end of the second flue gas inlet pipe is communicated with the first flue gas outlet pipe, the other end of the second flue gas inlet pipe is communicated with the flue gas inlet, the second flue gas outlet pipe is communicated with the flue gas outlet, the other end of the air inlet pipe is communicated with the slow fan, and the other end of the air outlet pipe is communicated with the heating system. The second flue gas advances in the pipe and carries the flue gas after purifying to the heat exchange box, and in the slow fan was gone into the air advance intraductal with external air pump, in the air advances the pipe along the air and gets into the air coil pipe, the flue gas gives off heat, heats the air, and the air after the heating gets into heating system through the air exit tube, and the flue gas is discharged through the second flue gas exit tube.

In some embodiments, the heating system comprises a high temperature resistant fan, a hot air inlet pipe, a high temperature heat dissipation pipe group and a hot air outlet pipe, wherein the high temperature resistant fan is communicated with the other end of the air outlet pipe, one end of the hot air inlet pipe is communicated with the other end of the high temperature resistant fan, the other end of the hot air inlet pipe is communicated with one end of the high temperature heat dissipation pipe group, the other end of the high temperature heat dissipation pipe group is communicated with the hot air outlet pipe, and the high temperature heat dissipation pipe group is arranged in the transition pool. Hot air is pumped into the hot air inlet pipe by the high-temperature resistant fan and then enters the high-temperature heat dissipation pipe group, and the heat of the hot air is dissipated into the transition pool to heat sewage in the transition pool, so that secondary heat exchange is realized.

In some embodiments, the transition pond includes cell body, first partition wall, first sewage import, top sewage import and first sewage export and blow off pipe, the cell body is equipped with left side wall and right side wall, top sewage import is located left side wall top, first sewage export is located right side wall bottom, the one end and the first sewage export of blow off pipe are linked together, the other end is linked together with anaerobic biogas tank, first partition wall is a plurality of, a plurality of first partition walls parallel arrangement in proper order, and distribute between left side wall and right side wall, a plurality of first partition walls separate the cell body into a plurality of little cell bodies respectively, top sewage import is located the top of first partition wall, top sewage import is with the little Chi Tixiang intercommunication of first partition wall both sides. Sewage flows into the tank body from the first sewage inlet, and the tank body is divided into a plurality of small tank bodies by a plurality of first partition walls. Sewage flows into the second small tank body through the top sewage inlet, so that the secondary heating of the sewage is realized, and the heating efficiency is improved. The sewage discharge pipe is used for discharging sewage in the transition pool into the anaerobic methane pool.

In some embodiments, the transition pool further comprises a plurality of second partition walls, the plurality of second partition walls are sequentially arranged in parallel and distributed between the left side wall and the right side wall, the second partition walls are mutually crossed with the first partition walls, the second partition walls divide the small pool body into two parts, the bottom sewage outlet is positioned at the bottom of the second partition walls, and the bottom sewage outlet is communicated with the divided two parts of small Chi Tixiang. The second partition wall divides the small tank body into two parts, and the substrate sewage outlet is convenient for sewage to flow into between the second partition wall and the first partition wall. The second partition wall is arranged, so that the high-temperature radiating pipes in the small tank body are increased, and the heating efficiency of sewage in the small tank body is improved.

In some embodiments, the high-temperature heat dissipation tube group comprises a plurality of groups of high-temperature heat dissipation tubes connected in parallel, the plurality of high-temperature heat dissipation tubes are respectively embedded in the left side wall, the right side wall, the first partition wall and the second partition wall, the hot air outlet tubes are a plurality of, the plurality of hot air outlet tubes are respectively communicated with the plurality of groups of high-temperature heat dissipation tubes in a one-to-one correspondence manner, and the high-temperature heat dissipation tubes are high-temperature resistant glass bent tubes. The high-temperature radiating pipes are embedded in the left side wall, the right side wall, the first partition wall and the second partition wall, so that the sewage in the tank body is conveniently heated by hot air.

In some embodiments, the aeration system comprises an axial flow fan, an aeration main pipe, an aeration branch pipe and an aeration disc, wherein one end of the axial flow fan is communicated with the air outlet pipe, the other end of the axial flow fan is communicated with the aeration main pipe, and the aeration disc is communicated with the aeration main pipe through the aeration branch pipe. The aeration branch pipes and the aeration discs are arranged in the transition tank, the aeration discs are divided into a plurality of groups, each group of aeration discs is communicated in series through one aeration branch pipe, the aeration branch pipes are in a plurality, the aeration branch pipes are distributed in parallel, and a first partition wall and a second partition wall are arranged between two adjacent aeration branch pipes. The aeration main pipe and the aeration branch pipe convey hot air to the aeration disc, and the hot air enters sewage in the transition pool through the aeration disc to perform aeration and heating treatment on the sewage.

In some embodiments, a method of using a warming device of an anaerobic biogas digester includes the steps of:

step a, purifying the flue gas generated by the biogas generator set through a tail gas exhaust system, and enabling the purified flue gas to enter a heat exchange system;

b, the purified flue gas enters a heat exchange system to exchange heat with air, the air is heated, the first heat exchange is realized, and the hot air enters a heating system and an aeration system respectively;

step c, hot air enters a heating system, sewage flows into a transition pool, the hot air radiates heat through a high-temperature radiating pipe, and the sewage in the transition pool is heated to realize secondary heat exchange;

and d, in the process of sewage flowing in the transition tank, hot air enters the sewage in the transition tank through the aeration system, aeration treatment and heating treatment are carried out on the sewage, third heat exchange is realized, and the heated and aerated sewage flows out of the transition tank and then enters the anaerobic methane tank for fermentation treatment.

Drawings

Fig. 1 is a schematic structural view of a heating apparatus of an anaerobic biogas digester according to an embodiment of the invention.

Fig. 2 is a schematic structural view of a smoke purifying assembly of a heating apparatus of an anaerobic biogas digester according to an embodiment of the invention.

Fig. 3 is a schematic view showing the structure of the front surface of a double-layer filter plate of a heating apparatus of an anaerobic biogas digester according to an embodiment of the invention.

Fig. 4 is a schematic view showing the structure of the reverse side of a double-layered filter plate of a heating apparatus for an anaerobic biogas digester according to an embodiment of the invention.

Fig. 5 is a top view of a warming system, an aeration system, and a transition tank of a warming apparatus of an anaerobic biogas digester according to an embodiment of the invention.

Fig. 6 is a schematic structural view of a heating system and a transition tank of a heating apparatus of an anaerobic biogas digester according to an embodiment of the invention.

Fig. 7 is a left side view of a high temperature radiating pipe and a transition tank of a heating apparatus of an anaerobic biogas digester according to an embodiment of the present invention.

Fig. 8 is a schematic view showing a structure of a heat exchange system of a heating apparatus of an anaerobic biogas digester according to an embodiment of the invention.

Fig. 9 is a flowchart of a method of using a heating apparatus of an anaerobic biogas digester according to an embodiment of the invention.

Detailed Description

The present invention will be described in further detail with reference to examples.

Referring to fig. 1 to 8, the invention provides a heating device of an anaerobic methane tank, which comprises a methane generator set 1, a tail gas exhaust system 2, a heat exchange system 3, an aeration system 4, a heating system 5 and a transition tank 6.

The exhaust gas system 2 includes an exhaust pipe 21 and a soot cleaning assembly 22. The fume purification assembly 22 includes a first fume inlet pipe 221, a first fume outlet pipe 222, a purification tank 223, and a double layer filter plate 224. The first flue gas inlet pipe 221 and the first flue gas outlet pipe 222 are respectively positioned at the left side and the right side of the purifying box body 223 and are respectively communicated with the purifying box body 223, the double-layer filter plate 224 is inserted into the purifying box body 223, and a first heat preservation layer is arranged outside the purifying box body 223. The first heat preservation wraps up in the purification box 223 outside, slows down the thermal dissipation of flue gas, prevents simultaneously scalds.

The front side of the double-layer filter plate 224 is provided with a high-temperature resistant filter screen 2241, the back side of the double-layer filter plate 224 is provided with a high-temperature resistant filter cloth 2242, and a pull ring 2243 is arranged above the double-layer filter plate 224. The thickness of the double-layer filter plate 224 is 5cm, and the aperture of the high-temperature resistant filter 2241 is 2000 meshes. After the double-layer filter plates 224 are inserted into the purifying box 223, the pull rings 2243 are positioned at the outer side of the purifying box 223, the number of the double-layer filter plates 224 is three, and the three double-layer filter plates 224 are uniformly distributed in the purifying box 223 along the direction from the first flue gas inlet pipe 221 to the first flue gas outlet pipe 222. The three double-layer filter plates 224 sequentially purify the flue gas entering the purification box 223. The flue gas passes through the double-layer filter plate 224, and the high-temperature resistant filter screen 2241 and the high-temperature resistant filter cloth 2242 sequentially filter the flue gas, so that part of smoke dust in the flue gas is deposited in the double-layer filter plate 224, and the flue gas is purified. When the double-layer filter plate 224 needs to be replaced, the double-layer filter plate 224 is taken out of the purifying box 223 through the pull ring 2243, and a new double-layer filter plate 224 is reinserted.

Two ends of the exhaust pipe 21 are respectively communicated with one ends of the biogas generator set 1 and a first flue gas inlet pipe 221, and a first flue gas outlet pipe 222 is communicated with the heat exchange system 3. The exhaust pipe 21 and the first flue gas inlet pipe 221 convey flue gas generated in the power generation process of the biogas generating unit 1 into the purifying box 223. The first flue gas outlet pipe 222 conveys the cleaned flue gas to the second flue gas inlet pipe 31 of the heat exchange system 3.

The heat exchange system 3 comprises a second flue gas inlet pipe 31, a second flue gas outlet pipe 32, an air coil 33, a heat exchange box 34, an air inlet pipe 35, an air outlet pipe 36 and a slow fan 37. The heat exchange box 34 is provided with a flue gas inlet and a flue gas outlet, one end of the second flue gas inlet pipe 31 is communicated with the first flue gas outlet pipe 222, the other end of the second flue gas inlet pipe is communicated with the flue gas inlet, and the second flue gas outlet pipe 32 is communicated with the flue gas outlet. The air coil 33 is mounted in the heat exchange box 34 in a spiral shape. One end of the air coil 33 communicates with one end of the air inlet tube 35 and the other end communicates with one end of the air outlet tube 36. The other end of the air inlet pipe 35 is communicated with a slow fan 37, and the other end of the air outlet pipe 36 is communicated with the heating system 5. A second insulating layer is provided outside the air outlet pipe 36. The flue gas enters the heat exchange box 34 through the second flue gas inlet pipe 31 and the flue gas inlet, and the slow fan 37 pumps outside air into the air coil 33 through the air inlet pipe 35. In the process that the air flows in the air coil 33, the flue gas heats the air in the air coil 33, and the heat exchange between the flue gas and the air is realized by utilizing the waste heat of the flue gas. The heated air is discharged from the air outlet pipe 36 and enters the high temperature resistant fan 51 of the heating system 5.

The heating system 5 comprises a high temperature resistant fan 51, a hot air inlet pipe 52, a high temperature heat dissipation pipe group 53 and a hot air outlet pipe 54. The hot air inlet pipe 52 and the hot air outlet pipe 54 are positioned above the transition pool 6, and the high-temperature heat dissipation pipe group 53 is arranged in the transition pool 6. The high-temperature heat dissipation tube group 53 includes a plurality of groups of high-temperature heat dissipation tubes 531 connected in parallel, and the plurality of high-temperature heat dissipation tubes 531 are respectively embedded in the left side wall 611, the right side wall 612, the first partition wall 62 and the second partition wall 63 of the transition tank 6.

The high temperature resistant fan 51 is communicated with the other end of the air outlet pipe 36, one end of the hot air inlet pipe 52 is communicated with the other end of the high temperature resistant fan 51, and the other end is communicated with one ends of a plurality of high temperature radiating pipes 531 through a plurality of branch pipes. The hot air is delivered into the hot air inlet pipe 52 by the high temperature resistant fan 51, and enters the high temperature radiating pipes 531 connected in parallel along the plurality of branch pipes, and the high temperature radiating pipes 531 are high temperature resistant glass bent pipes. The hot air in the high-temperature radiating pipe 531 radiates heat outwards to heat the sewage in the tank body 61, so that the heat exchange between the hot air and the sewage is realized, the waste heat is fully utilized, and the purpose of heating the sewage in the transition tank 6 is achieved.

The hot air outlet pipes 54 are plural, and the plural hot air outlet pipes 54 are respectively communicated with the plural high-temperature radiating pipes 531 in a one-to-one correspondence manner. The hot air outlet pipe 54 is positioned at the top of the left side wall 611, the right side wall 612, the first partition wall 62, and the second partition wall 63. The air after heat exchange is discharged from the hot air outlet pipe 54 along the high temperature heat dissipating pipe 531.

The aeration system 4 includes an axial flow fan 41, an aeration main pipe 42, an aeration branch pipe 43, and an aeration tray 44. One end of the axial flow fan 41 communicates with the air outlet pipe 36, and the other end communicates with the aeration main pipe 42. The aeration branch pipe 43 is communicated with the aeration main pipe 42 at one end and is communicated with the aeration disc 44 at the other end, the aeration branch pipe 43 and the aeration disc 44 are arranged in the transition pool 6, the aeration disc 44 is divided into a plurality of groups, each group of aeration disc 44 is communicated in series through one aeration branch pipe 43, the aeration branch pipes 43 are in a plurality, the aeration branch pipes 43 are distributed in parallel, and a first partition wall 62 or a second partition wall 63 is arranged between two adjacent aeration branch pipes 43.

The transition tank 6 comprises a tank body 61, a first partition wall 62, a second partition wall 63, a first sewage inlet 64, a top sewage inlet 65, a bottom sewage outlet 66, a first sewage outlet 67 and a drain pipe 68. The tank body 61 is provided with a left side wall 611 and a right side wall 612, the first sewage inlet 64 is positioned at the top of the left side wall 11, the first sewage outlet 67 is positioned at the bottom of the right side wall 612, one end of the sewage drain pipe 68 is communicated with the first sewage outlet 67, and the other end is communicated with the anaerobic methane tank 7.

The plurality of first partition walls 62 are arranged in sequence, and are distributed between the left side wall 611 and the right side wall 612. The plurality of first partition walls 62 partition the cell body 61 into a plurality of small cell bodies, respectively. The top sewage inlet 65 is located at the top of the first partition wall 62, and the top sewage inlet 65 communicates the small Chi Tixiang on both sides of the first partition wall 62.

The plurality of second partition walls 63 are arranged in sequence, and are distributed between the left side wall 511 and the right side wall 512, and the second partition walls 63 are arranged to cross the first partition walls 62. The second partition wall 63 divides one small tank body into two parts, the bottom sewage outlet 66 is positioned at the bottom of the second partition wall 63, and the bottom sewage outlet 66 communicates the two parts of the same small tank body. Sewage flows into the tank body from the first sewage inlet 64, passes through the bottom sewage outlet 66, fills the first small tank body, and the left side wall, the first second partition wall 63 and the high-temperature radiating pipe 531 in the first partition wall 62 radiate heat to heat the sewage in the first small tank body; when the sewage height exceeds the top sewage inlet 65, sewage flows into the second small tank body through the top sewage inlet 65, sewage passes through the second bottom sewage outlet 66, the second small tank body is filled with sewage, the first partition wall 62, the second partition wall 63 and the high-temperature radiating pipe 531 in the second first partition wall 62 radiate heat, the sewage in the second small tank body is heated, when the sewage height exceeds the top sewage inlet 65, the sewage flows into the third small tank body through the top sewage inlet 65, the high-temperature radiating pipe 531 in the second first partition wall 62 and the right side wall 612 heats the sewage in the third small tank body. The heated sewage flows into the anaerobic biogas digester 7 through the first sewage outlet 67 and the sewage drain pipe 68.

Example 2

Referring to fig. 1 to 9, the invention provides a method for using a heating device of an anaerobic biogas digester, comprising the following steps:

step a, smoke generated by the biogas generating set 1 sequentially passes through the exhaust pipe 21 and the first smoke inlet pipe 221, enters the purifying box 223, sequentially passes through the double-layer filter plate 224 for filtering, smoke dust in the smoke is filtered by the high-temperature resistant filter screen 2241 and the high-temperature resistant filter cloth 2242, is deposited in the double-layer filter plate 224, is discharged by the first smoke outlet pipe 222, and enters the heat exchange system 3;

step b, the purified flue gas enters the heat exchange box body 34 through the second flue gas inlet pipe 31 and the flue gas inlet, the air is blown into the air coil 33 through the air inlet pipe 35 by the slow fan 37, the air flows along the air coil 33 in the heat exchange box body 34 to the air outlet pipe 36, the air absorbs the heat of the flue gas in the flowing process, the air is heated, the first heat exchange is completed, the flue gas is discharged through the flue gas outlet and the second flue gas outlet pipe 32, and the hot air flows out from the air outlet pipe 36 and respectively enters the heating system 5 and the aeration system 4;

step c, sewage flows into the tank body 61 through the first sewage inlet 64, the first small tank body is filled with sewage through the bottom sewage outlet 66 at the bottom of the second partition wall 63, and the left side wall 611, the first second partition wall 63 and the high-temperature radiating pipes 531 in the first partition wall 62 radiate heat to heat the sewage in the first small tank body; when the sewage level in the first small tank body reaches the level of the top sewage inlet 65 of the first partition wall 62, sewage flows into the second small tank body from the first small tank body through the top sewage inlet 65, the sewage passes through the second bottom sewage outlet 56, the second small tank body is filled with the sewage, and the first partition wall 62, the second partition wall 63 and the high-temperature radiating pipe 531 in the second partition wall 62 radiate heat to heat the sewage in the second small tank body; when the sewage level exceeds the top sewage inlet 65, sewage flows into the third small tank through the top sewage inlet 65, and the second first partition wall 62 and the high-temperature radiating pipe 531 in the right side wall 612 heat the sewage in the third small tank. The sewage heated in the third small tank body flows into the anaerobic methane tank 7 through the first sewage outlet 67 and the sewage discharge pipe 68, and after the heated sewage enters the anaerobic methane tank 7, anaerobic fermentation is carried out, so that the biogas production effect is better than that of normal-temperature anaerobic fermentation.

In the process that the sewage flows in the transition tank 6, the high-temperature-resistant fan 51 of the heating system 5 blows hot air into the hot air inlet pipe 52, the hot air enters a plurality of groups of high-temperature radiating pipes 531 which are connected in parallel, the high-temperature radiating pipes 531 embedded in the left side wall 611, the right side wall 612, the first partition wall 62 and the second partition wall 63 radiate heat of the hot air in the pipes, the sewage in the transition tank 6 is heated, the second heat exchange is realized, and the air after the heat exchange is discharged from the hot air outlet pipe 54;

in the process of flowing the sewage in the transition tank 6, the axial flow fan 41 blows hot air into the aeration main pipe 42, the hot air flows into the aeration main pipe 42 along the aeration main pipes 43 respectively, further flows into the plurality of groups of aeration discs 44 connected in parallel by the plurality of aeration main pipes 43, flows out of the plurality of aeration discs 44, enters the sewage in the transition tank 6, carries out aeration treatment and heating treatment on the sewage, and when the heated and aerated sewage flows into the last small tank body, the sewage flows out from the first sewage outlet 67 of the right side wall 612, flows into the sewage drain pipe 68 and then enters the anaerobic methane tank 7 for fermentation treatment.

The foregoing is merely illustrative of some embodiments of the invention, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the inventive concept.

Claims (5)

1. The heating device of the anaerobic methane tank is characterized by comprising a methane generator set, a tail gas exhaust system, a heat exchange system, an aeration system, a heating system and a transition tank, wherein the tail gas exhaust system comprises an exhaust pipe and a smoke purification assembly, two ends of the exhaust pipe are respectively communicated with one end of the smoke purification assembly and the methane generator set, the other end of the smoke purification assembly is communicated with the heat exchange system, the other end of the heat exchange system is communicated with one end of the aeration system and one end of the heating system in parallel, the heating system and the aeration system are both arranged in the transition tank, the transition tank is communicated with the anaerobic methane tank, the heat exchange system comprises an air coil pipe and an air outlet pipe, one end of the air outlet pipe is communicated with the air coil pipe, the heating system comprises a high temperature resistant fan, a hot air inlet pipe, a high temperature heat dissipation pipe group and a hot air outlet pipe, wherein the high temperature resistant fan is communicated with the other end of the air outlet pipe, one end of the hot air inlet pipe is communicated with the other end of the high temperature resistant fan, the other end of the hot air inlet pipe is communicated with one end of the high temperature heat dissipation pipe group, the other end of the high temperature heat dissipation pipe group is communicated with the hot air outlet pipe, the high temperature heat dissipation pipe group is arranged in a transition pool, the transition pool comprises a pool body, a first partition wall, a first sewage inlet, a top sewage inlet, a first sewage outlet and a sewage draining pipe, the pool body is provided with a left side wall and a right side wall, the top sewage inlet is positioned at the top of the left side wall, the first sewage outlet is positioned at the bottom of the right side wall, one end of the sewage draining pipe is communicated with the first sewage outlet, the other end of the sewage outlet is communicated with the anaerobic methane pool, the first partition wall is a plurality of sewage inlets, the first partition walls are sequentially and parallelly arranged and distributed between the left side wall and the right side wall, the first partition walls divide the tank body into a plurality of small tank bodies, the top sewage inlet is positioned at the top of the first partition wall, the top sewage inlet is communicated with the small Chi Tixiang on two sides of the first partition wall, the transition tank further comprises a second partition wall, the second partition walls are sequentially and parallelly arranged and distributed between the left side wall and the right side wall, the second partition wall and the first partition wall are mutually crossed and arranged, the second partition wall divides the small tank body into two parts, the bottom sewage outlet is positioned at the bottom of the second partition wall, the separated two parts of the bottom sewage outlet are communicated with each other by the small Chi Tixiang, the high-temperature heat dissipation pipe comprises a plurality of groups of high-temperature heat dissipation pipes which are connected in parallel, the high-temperature radiating pipes are respectively embedded in the left side wall, the right side wall, the first partition wall and the second partition wall, the hot air outlet pipes are multiple, the hot air outlet pipes are respectively communicated with a plurality of groups of high-temperature radiating pipes in a one-to-one correspondence manner, the hot air outlet pipes are positioned at the tops of the left side wall, the right side wall, the first partition wall and the second partition wall, the high-temperature radiating pipes are high-temperature resistant glass bent pipes, the aeration system comprises an axial flow fan, an aeration main pipe, an aeration branch pipe and an aeration disc, one end of the axial flow fan is communicated with the air outlet pipes, the other end of the axial flow fan is communicated with the aeration main pipe, the aeration disc is communicated with the aeration main pipe through the aeration branch pipe, the aeration branch pipe and the aeration disc are arranged in the transition tank, the aeration disc is multiple, the aeration disc is divided into a plurality of groups, each group of aeration discs are communicated in series through one aeration branch pipe, a plurality of aeration branch pipes are arranged, the aeration branch pipes are distributed in parallel, and a first partition wall or a second partition wall is arranged between every two adjacent aeration branch pipes.

2. The heating device of an anaerobic biogas digester according to claim 1, wherein the smoke purifying component comprises a first smoke inlet pipe, a first smoke outlet pipe, a purifying tank body and a double-layer filter plate, the first smoke inlet pipe and the first smoke outlet pipe are respectively positioned at the left side and the right side of the purifying tank body and are respectively communicated with the purifying tank body, the double-layer filter plate is inserted into the purifying tank body, and a first heat preservation layer is arranged outside the purifying tank body.

3. The heating device of the anaerobic methane tank according to claim 2, wherein the front surface of the double-layer filter plate is provided with a high-temperature resistant filter screen, the back surface of the double-layer filter plate is provided with a high-temperature resistant filter cloth, the upper part of the double-layer filter plate is provided with pull rings, the pull rings are positioned on the outer side of the purifying box body, the number of the double-layer filter plates is three, and the three double-layer filter plates are mutually parallel and uniformly distributed in the purifying box body along the direction from the first flue gas inlet pipe to the first flue gas outlet pipe.

4. The heating device of an anaerobic biogas digester according to claim 2, wherein the heat exchange system further comprises a second flue gas inlet pipe, a second flue gas outlet pipe, a heat exchange box, an air inlet pipe and a slow fan, wherein the heat exchange box is provided with a flue gas inlet and a flue gas outlet, the air coil is installed in the heat exchange box, one end of the air coil is communicated with one end of the air inlet pipe, the other end of the air coil is communicated with one end of the air outlet pipe, one end of the second flue gas inlet pipe is communicated with the first flue gas outlet pipe, the other end of the second flue gas inlet pipe is communicated with the flue gas inlet, the second flue gas outlet pipe is communicated with the flue gas outlet, and the other end of the air inlet pipe is communicated with the slow fan.

5. The method of using a heating apparatus of an anaerobic biogas digester according to any one of claims 1-4, comprising the steps of:

step a, purifying the flue gas generated by the biogas generator set through a tail gas exhaust system, and enabling the purified flue gas to enter a heat exchange system;

b, the purified flue gas enters a heat exchange system to exchange heat with air, the air is heated, the first heat exchange is realized, and the hot air enters a heating system and an aeration system respectively;

step c, hot air enters a heating system, sewage flows into a transition pool, the hot air radiates heat through a high-temperature radiating pipe, and the sewage in the transition pool is heated to realize secondary heat exchange;

and d, in the process of sewage flowing in the transition tank, hot air enters the sewage in the transition tank through the aeration system, aeration treatment and heating treatment are carried out on the sewage, third heat exchange is realized, and the heated and aerated sewage flows out of the transition tank and then enters the anaerobic methane tank for fermentation treatment.

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