CN217809278U - Heat accumulation oxidation unit of ventilation air methane - Google Patents

Abstract

The utility model discloses a thermal storage oxidation device of ventilation air methane, wherein a low-concentration gas inlet and an air inlet are respectively communicated with a filter box, and a filter device is arranged in the filter box; the communicating pipe penetrates through the second ceramic heat accumulator and then extends to a third ceramic heat accumulator, a lower-section heat exchange channel, a middle-section heat exchange channel and an upper-section heat exchange channel are sequentially arranged on the first ceramic heat accumulator, the second ceramic heat accumulator and the third ceramic heat accumulator, and a terminal outlet pipe is arranged at the bottom of the heat accumulator; the oxidation chamber is communicated with the second air storage cavity through an air inlet pipe. The utility model provides a thermal storage oxidation device of ventilation air methane can carry out prefiltering to low concentration gas and air, avoids polluting regenerator and oxidizing chamber, and the high temperature flue gas after the oxidation treatment can reverse through the regenerator, and then exchanges the new trend and preheats, and is more energy-conserving, high-efficient.

Description

Heat accumulation oxidation unit of ventilation air methane

Technical Field

The utility model relates to a gas processing technology field specifically is a heat accumulation oxidation unit of ventilation air methane.

Background

Low-concentration gas discharged by a gas pump station is used as fuel in a mine field, and methane is oxidized by adopting a low-concentration gas heat storage oxidation technology to generate high-temperature flue gas which can be reused. Through the implementation of the project, the emission of atmospheric pollutants can be reduced, good energy-saving and environment-friendly benefits are achieved, meanwhile, the evacuated low-concentration gas is fully utilized, the coal consumption is saved, the utilization and subsidy of extracted gas can be obtained, and economic benefits are brought to the mine.

In the prior art, a multi-bed ventilation air methane heat storage oxidation device with application number of 201210217843.8 is applied to a ventilation air methane countercurrent thermal oxidation treatment process in a coal mine production process, and comprises an oxidation bed, a combustion chamber, a preheater, a ventilation air methane inlet pipe, a flue gas outlet pipe, a purging pipeline, a flue gas extraction pipeline, a switching valve and a control unit. The oxidation bed has three or more than three oxidation beds, is of a vertical structure, is provided with heat-insulating refractory materials on the periphery, and is additionally provided with a purging and purifying process outside heat storage and heat release circulation, so that unoxidized ventilation air is prevented from being directly exhausted into the atmosphere, the oxidation rate is up to more than 99 percent, and meanwhile, a flue gas extraction port is arranged between a high-temperature area and a low-temperature area of the oxidation bed, and part of high-temperature flue gas can be extracted for waste heat utilization.

It still has drawbacks: 1. the device can not filter low-concentration gas and air before heat accumulation oxidation treatment, so that impurities in the gas can easily pollute subsequent treatment equipment, and the complexity and the cleaning burden of the purging device are increased; 2. be provided with three oxidation beds among the above-mentioned device altogether, have certain distance each other, can not retrieve the heat of high temperature steam fast, efficient, moreover, the area that three oxidation beds set up side by side is also great, receives space limitation easily.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: an object of the utility model is to provide a thermal storage oxidation unit of ventilation air methane to solve the problem that proposes among the above-mentioned background art.

A thermal storage oxidation device of ventilation air methane comprises:

the filter box is respectively communicated with a low-concentration gas inlet and an air inlet, and a filter device is arranged in the filter box;

the heat storage device comprises a heat storage chamber, wherein a first ceramic heat accumulator, a second ceramic heat accumulator and a third ceramic heat accumulator are fixedly arranged in the heat storage chamber from bottom to top in sequence, the interior of the heat storage chamber is further divided into a first cavity, a second cavity, a third cavity and a fourth cavity from bottom to top in sequence, a first air storage cavity is formed in the first ceramic heat accumulator and is communicated with a filter box through an air duct, a plurality of communicating pipes are fixedly communicated with the first air storage cavity and extend to the third ceramic heat accumulator after penetrating through the second ceramic heat accumulator, a second air storage cavity is formed in the third ceramic heat accumulator and is communicated with the second air storage cavity, a lower-section heat exchange channel, a heat exchange middle-section channel and an upper-section heat exchange channel are sequentially formed in the first ceramic heat accumulator, the second ceramic heat accumulator and the third ceramic heat accumulator, and a terminal outlet pipe is arranged at the bottom of the heat storage chamber; and

and the oxidation chamber is communicated with the second gas storage cavity through an air inlet pipe, a second electric control valve is arranged on the air inlet pipe, and an exhaust pipe is communicated between the air inlet pipe and the third cavity.

Preferably, the filter device comprises a first filter plate and a second filter plate which are arranged at intervals.

Preferably, an upper spoiler and a lower spoiler are arranged between the first filter plate and the second filter plate in a non-contact manner, the upper spoiler is fixed on the upper wall of the inner cavity of the filter box, and the lower spoiler is fixed on the lower wall of the inner cavity of the filter box.

Preferably, the outer sides of the communicating pipes positioned in the second cavity and the third cavity are respectively sleeved with a heat conducting pipe, and a molten salt heat storage medium is filled between the communicating pipes and the heat conducting pipes.

Preferably, a temperature measuring instrument and a first electric control valve are arranged on the terminal outlet pipe, a return pipe is arranged between the exhaust pipe and the first cavity in a communicating mode, and a third electric control valve and an air pump are arranged on the return pipe.

Has the advantages that:

1. the utility model provides a heat accumulation oxidation unit of ventilation air methane, the front end at regenerator and oxidation chamber is provided with the rose box, can filter in advance and block the impurity filth in low concentration gas and the air, avoids it to pollute subsequent equipment, lightens artifical clear burden, has also simplified subsequent regenerator and oxidation chamber, need not to install separately and prevents to sweep etc. cleaning device;

2. the utility model provides a thermal storage oxidation device of ventilation air methane, the inside from the bottom up of regenerator is the fixed first ceramic heat accumulator that has set gradually, second ceramic heat accumulator and third ceramic heat accumulator, when admitting air, gaseous from the bottom up, after gaseous processing through the oxidizing chamber, can from the top down pass through the regenerator, and then to first ceramic heat accumulator, second ceramic heat accumulator and third ceramic heat accumulator exchange the heat accumulation, it preheats subsequent new trend to be convenient for, effectively utilize high temperature flue gas, and is not only more energy-conserving, and the position setting of three ceramic heat accumulator is more reasonable, it is littleer to take up an area of the space.

The utility model provides a thermal storage oxidation device of ventilation air methane can carry out prefiltration to low concentration gas and air, avoids polluting regenerator and oxidizing chamber, and the high temperature flue gas after the oxidation treatment can reverse through the regenerator, and then exchanges the new trend and preheat, and is more energy-conserving, high-efficient.

Drawings

Fig. 1 is a schematic front sectional view of the overall structure of the present invention;

FIG. 2 is a schematic sectional front view of the inner structure of the regenerator in accordance with the present invention;

FIG. 3 is a schematic view showing the flow direction of the gas preheated by the regenerator and entering the oxidation chamber;

FIG. 4 is a schematic flow diagram of the gas counterflow preheat regenerator of the oxidation chamber of the present invention;

fig. 5 is a schematic flow diagram of the gas reflux preheating after the treatment of the present invention.

In the figure: 1. a filter box; 2. a low-concentration gas inlet; 3. an air inlet; 4. a first filter plate; 5. a second filter plate; 6. an upper spoiler; 7. a lower spoiler; 8. a regenerator; 801. a first cavity; 802. a second cavity; 803. a third cavity; 804. a fourth cavity; 9. a first ceramic heat accumulator; 901. a first gas storage chamber; 902. a lower section heat exchange channel; 10. a second ceramic heat accumulator; 102. a middle section heat exchange channel; 11. a third ceramic heat accumulator; 111. a second gas storage chamber; 112. an upper heat exchange channel; 12. an air duct; 13. a communicating pipe; 14. a heat conducting pipe; 15. a molten salt heat storage medium; 16. a terminal outlet pipe; 17. a temperature measuring instrument; 18. a first electrically controlled valve; 19. an oxidation chamber; 20. an air inlet pipe; 21. a second electrically controlled valve; 22. an exhaust duct; 23. a return pipe; 24. a third electrically controlled valve; 25. an air pump.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

The utility model provides a following several kinds of technical scheme:

the first embodiment is as follows:

a thermal storage oxidation device of ventilation air methane comprises:

the filter box comprises a filter box 1, wherein a low-concentration gas inlet 2 and an air inlet 3 are respectively communicated with the filter box 1 and mixed after entering the filter box 1, a filter device is arranged in the filter box 1 and can filter and block pollutants in low-concentration gas and air to prevent the pollutants from polluting subsequent treatment equipment, so that the subsequent equipment can be provided with less or no other cleaning devices such as reverse purging and the like, and the filter box 1 is cleaned regularly to reduce the burden;

a heat storage chamber 8, a first ceramic heat accumulator 9, a second ceramic heat accumulator 10 and a third ceramic heat accumulator 11 are fixedly arranged in the heat storage chamber 8 from bottom to top in sequence, a proper gap is formed among the first ceramic heat accumulator 9, the second ceramic heat accumulator 10 and the third ceramic heat accumulator 11, the inner part of the heat storage chamber 8 is further divided into a first cavity 801, a second cavity 802, a third cavity 803 and a fourth cavity 804 from bottom to top in sequence, a first air storage cavity 901 is arranged in the first ceramic heat storage body 9, the first air storage cavity 901 is communicated with the filter box 1 through an air duct 12, therefore, the mixed gas of the mixed low-concentration gas and the air firstly enters the first gas storage cavity 901 of the first ceramic heat accumulator 9 through the gas guide pipe 12, a plurality of communicating pipes 13 are fixedly communicated with the first air storage chamber 901, the communicating pipes 13 are preferably made of a material with good heat conductivity, such as a metal pipe, etc., the connection pipe 13 extends to the third ceramic heat accumulator 11 after penetrating the second ceramic heat accumulator 10, the second gas storage chamber 111 is opened in the third ceramic heat accumulator 11, and the communicating pipe 13 is communicated with the second gas storage cavity 111, the first ceramic heat accumulator 9, the second ceramic heat accumulator 10 and the third ceramic heat accumulator 11 are sequentially provided with a lower section heat exchange channel 902, a middle section heat exchange channel 102 and an upper section heat exchange channel 112, the high-temperature flue gas treated in the oxidation chamber 19 passes through the upper section heat exchange channel 112, the middle section heat exchange channel 102 and the lower section heat exchange channel 902 in sequence, further heating the third ceramic heat accumulator 11, the second ceramic heat accumulator 10 and the first ceramic heat accumulator 9, so that the subsequent mixing gas can be preheated to facilitate the oxidation reaction, the bottom of the regenerator 8 is provided with a terminal outlet pipe 16, after oxidation treatment and reflux preheating, the gas is finally discharged from the terminal outlet pipe 16, and can be directly discharged or subjected to further processing by other equipment; and

the oxidation chamber 19, the mixed gas after the low concentration gas and the air are mixed reacts in the oxidation chamber 19, high temperature flue gas can be formed after the reaction, the oxidation chamber 19 is communicated with the second gas storage cavity 111 through the air inlet pipe 20, the air inlet pipe 20 is provided with the second electric control valve 21, after the reaction is finished, the second electric control valve 21 is opened, the air inlet pipe 20 is communicated with the third cavity 803 and is provided with the exhaust pipe 22, the high temperature flue gas enters the heat storage chamber 8 through the exhaust pipe 22, and then the third ceramic heat storage body 11, the second ceramic heat storage body 10 and the first ceramic heat storage body 9 are sequentially heated, so that the heat can be recycled, and the energy can be saved.

Example two:

a thermal storage oxidation device of ventilation air methane comprises:

the filter box 1 is provided with a low-concentration gas inlet 2 and an air inlet 3 which are communicated with each other and mixed after entering the filter box 1, the filter box 1 is internally provided with a filter device which can filter and block pollutants in low-concentration gas and air so as to prevent the pollutants from polluting subsequent treatment equipment, so that the subsequent equipment can be provided with less or no other cleaning devices such as reverse purging and the like, and the filter box 1 is cleaned regularly, so that the burden is reduced;

a heat storage chamber 8, a first ceramic heat storage body 9, a second ceramic heat storage body 10 and a third ceramic heat storage body 11 are fixedly arranged in the heat storage chamber 8 from bottom to top in sequence, a proper gap exists among the three, the interior of the heat storage chamber 8 is further divided into a first cavity 801, a second cavity 802, a third cavity 803 and a fourth cavity 804 from bottom to top in sequence, a first gas storage cavity 901 is arranged in the first ceramic heat storage body 9, the first gas storage cavity 901 is communicated with a filter box 1 through a gas guide pipe 12, therefore, mixed gas of mixed low-concentration gas and air can firstly enter the first gas storage cavity 901 of the first ceramic heat storage body 9 through the gas guide pipe 12, a plurality of communicating pipes 13 are fixedly communicated with the first gas storage cavity 901, the communicating pipe 13 is preferably made of a material with good heat conductivity, such as a metal pipe, and the like, the communicating pipe 13 extends to the third ceramic heat storage body 11 after penetrating through the second ceramic heat storage body 10, the third ceramic heat storage body 11 is provided with a second ceramic heat transfer medium passage 902, a heat exchange medium passage 14 is arranged in sequence, a heat exchange medium channel 14 is arranged between the upper section of the third ceramic heat storage cavity and the heat storage cavity, a heat storage cavity 112, the heat exchange medium passage 14, the heat storage cavity 112 and the heat storage chamber 11, the heat storage body 11, the heat exchange medium can be conveniently carried out by heat exchange reaction, the heat exchange reaction between the heat exchange medium passage 14 and the heat storage medium, the heat exchange medium, the heat storage medium passage 14, the heat exchange medium passage 14, the fused salt heat storage medium 15 has good heat conduction performance, can realize better absorption and conduction to the heat in the high-temperature flue gas, lighten the heat loss, the bottom of the regenerator 8 is provided with a terminal outlet pipe 16, after oxidation treatment and reflux preheating, the gas is finally discharged from the terminal outlet pipe 16, can be directly discharged or can be further processed by other equipment; and

the oxidation chamber 19 is communicated with the second gas storage cavity 111 through an air inlet pipe 20, a second electric control valve 21 is arranged on the air inlet pipe 20, after the reaction is finished, the second electric control valve 21 is opened, an exhaust pipe 22 is communicated between the air inlet pipe 20 and a third cavity 803, the high-temperature flue gas enters the heat storage chamber 8 through the exhaust pipe 22, and then the third ceramic heat storage body 11, the second ceramic heat storage body 10 and the first ceramic heat storage body 9 are sequentially heated, so that heat is recycled, energy is saved, a temperature measuring instrument 17 and a first electric control valve 18 are arranged on a terminal outlet pipe 16, a return pipe 23 is communicated between the exhaust pipe 22 and the first cavity 801, a third electric control valve 24 and an air pump 25 are arranged on the return pipe 23, when the temperature measuring instrument 17 detects that the temperature of the gas blown out from the bottom of the terminal outlet pipe 16 exceeds a preset value, the first electric control valve 18 can be closed, the return pipe 24 and the return pipe 25 are opened, so that the mixed gas flows out from the bottom 8 of the air pump, the air pump 8, and then the heat storage chamber 19 can be conducted to the heat absorption chamber 8 again through the exhaust pipe 22, and waste of the high-temperature flue gas is reduced.

Example three:

in this embodiment, on the basis of the first or second embodiment, the filtering apparatus is further defined as follows: filter equipment includes first filter 4 and second filter 5 that the interval set up, first filter 4 and second filter 5 can adopt the same or different filter medium, and then can carry out more thorough filtration interception to the pollutant in low concentration gas and the air, contactless is provided with spoiler 6 and lower spoiler 7 between first filter 4 and the second filter 5, go up spoiler 6 and be fixed in the inner chamber upper wall of rose box 1, and spoiler 7 is fixed in the inner chamber lower wall of rose box 1 down, therefore, go up spoiler 6 and lower spoiler 7 cooperation and use, can block the flow direction of low concentration gas and air, and then promote the mixing of the two, make gas mixing more even.

The working principle is as follows:

during the use, let in low concentration gas and air to the inside of rose box 1 through low concentration gas inlet 2 and air intlet 3 respectively, these gases can be at first through first filter 4, to pollution-free interception wherein, in order to realize preliminary filtration, then, these walk around in proper order spoiler 6 and lower spoiler 7, the in-process that turns to at the choked flow realizes the mixing, then, these gaseous rethread second filter 5, carry out further filtration, finally, the mixing gas after the filtration enters into regenerator 8 through air duct 12.

The gas firstly enters a first gas storage cavity 901 formed in a first ceramic heat accumulator 9 at the bottom of a heat storage chamber 8, enters a second gas storage cavity 111 after passing through a communicating pipe 13, then enters an oxidation chamber 19 through an air inlet pipe 20 for oxidation treatment, and high-temperature flue gas generated after treatment contains a large amount of heat and can cause serious waste of heat if being directly discharged, so that after the oxidation treatment is finished, a second electric control valve 21 is opened, a third electric control valve 24 is closed, the high-temperature flue gas enters a fourth cavity 804 of the heat storage chamber 8 through an exhaust pipe 22, then the high-temperature gas sequentially passes through an upper section heat exchange channel 112 of a third ceramic heat accumulator 11, a middle section heat exchange channel 102 of a second ceramic heat accumulator 10 and the first gas storage cavity 901 of the first ceramic heat accumulator 9 and finally enters a first cavity 801, and in the process, the high-temperature flue gas can heat the first ceramic heat accumulator 9, the second ceramic heat accumulator 10 and the third ceramic heat accumulator 11, so that subsequent gas can be preheated, further, the reaction is promoted, and fresh air can be discharged through a first electric control valve 18 and a first electric control outlet pipe 16; however, when the exhaust gas is exhausted, the temperature measuring instrument 17 may be opened, and if the temperature measuring instrument 17 detects that the temperature of the gas blown out from the terminal outlet pipe 16 exceeds a predetermined value, the first electrically controlled valve 18 may be closed, and the third electrically controlled valve 24 and the air pump 25 may be opened, so that the gas flowing out from the bottom of the regenerator 8 may flow back to the regenerator 8 through the return pipe 23 and the exhaust pipe 22, and further the high-temperature flue gas may be subjected to heat absorption and conduction again, thereby reducing heat waste, and making the apparatus more energy-saving and environment-friendly.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (5)

1. A thermal storage oxidation device of ventilation air methane is characterized by comprising:

the gas filter comprises a filter box (1), wherein a low-concentration gas inlet (2) and an air inlet (3) are respectively communicated with the filter box (1), and a filter device is arranged in the filter box (1);

the heat storage chamber comprises a heat storage chamber (8), wherein a first ceramic heat accumulator (9), a second ceramic heat accumulator (10) and a third ceramic heat accumulator (11) are fixedly arranged in the heat storage chamber (8) from bottom to top in sequence, the interior of the heat storage chamber (8) is further divided into a first cavity (801), a second cavity (802), a third cavity (803) and a fourth cavity (804) from bottom to top in sequence, a first gas storage cavity (901) is formed in the first ceramic heat accumulator (9), the first gas storage cavity (901) is communicated with a filter box (1) through a gas guide pipe (12), a plurality of communicating pipes (13) are fixedly communicated with the first gas storage cavity (901), the communicating pipes (13) extend to the third ceramic heat accumulator (11) after penetrating through the second ceramic heat accumulator (10), a second gas storage cavity (111) is formed in the third ceramic heat accumulator (11), the communicating pipes (13) are communicated with the second gas storage cavity (111), the first ceramic heat accumulator (9), the second ceramic heat accumulator (10), the third ceramic heat accumulator (11) and a heat exchange channel (102) and an upper heat exchange channel (16) and an outlet pipe (16) are sequentially arranged on the heat storage chamber; and

oxidation chamber (19), oxidation chamber (19) communicate in second gas storage chamber (111) through air-supply line (20), be provided with second automatically controlled valve (21) on air-supply line (20), it is provided with exhaust pipe (22) to communicate between air-supply line (20) and third cavity (803).

2. The thermal storage oxidation device for ventilation air methane according to claim 1, characterized in that: the filter device comprises a first filter plate (4) and a second filter plate (5) which are arranged at intervals.

3. The thermal storage oxidation device for ventilation air methane according to claim 2, characterized in that: contactless is provided with spoiler (6) and lower spoiler (7) between first filter (4) and second filter (5), go up spoiler (6) and be fixed in the inner chamber upper wall of rose box (1), just lower spoiler (7) are fixed in the inner chamber lower wall of rose box (1).

4. The thermal storage oxidation device for ventilation air methane according to claim 1, characterized in that: and heat-conducting pipes (14) are sleeved on the outer sides of the communicating pipes (13) positioned in the second cavity (802) and the third cavity (803), and a molten salt heat storage medium (15) is filled between the communicating pipes (13) and the heat-conducting pipes (14).

5. The thermal storage oxidation device for ventilation air methane according to claim 1, characterized in that: the temperature measuring instrument (17) and the first electric control valve (18) are arranged on the terminal outlet pipe (16), the return pipe (23) is communicated between the exhaust pipe (22) and the first cavity (801), and the third electric control valve (24) and the air pump (25) are arranged on the return pipe (23).

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