CN2713311Y

CN2713311Y - Combustion reaction device for processing ventilation off gas of coal mine

Info

Publication number: CN2713311Y
Application number: CN 03262648
Authority: CN
Inventors: 张强
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-08-21
Filing date: 2003-08-21
Publication date: 2005-07-27
Anticipated expiration: 2013-08-21

Abstract

The utility model discloses a combustion reaction device for processing ventilation off gas of coal mine, and the utility model has simple structure and easy operation. The activation energy adopts the heat combustion flue gas to preheat the inlet ventilation off gas and decreases the combustion reaction by the accelerant and changes the reversal intermittent flow into the one-way continuous constant flow and improves the stability, the security and the operability of the system. The combustion reaction device for processing ventilation off gas of coal mine comprises a gas inlet zone. The gas inlet zone is communicated with a preheating zone. A heat exchanger is arranged in the preheating zone. The preheating zone is communicated with the combustion zone. The combustion zone is communicated with the gas inlet port of the heat exchanger in the preheating zone. The gas outlet port of the heat exchanger is communicated with the exhausting zone.

Description

Be used to handle the combustion reaction device of the weary gas of coalmine ventilation

One, technical field:

The utility model relates to a kind of combustion reaction device that is used to handle the weary gas of coalmine ventilation, and it is applicable to that methane in the exhaust is destroyed in the colliery of methane concentration between 0.15-1.0% in the weary gas of air outlet ventilation, reaches the purpose of protection environment and using energy source.

Two, background technology:

In the prior art, the use device of the weary gas of relevant coalmine ventilation has the CFRR catalytic burner of Canadian CANMET energy technology center development and the heating power TFRR burner that can be used for handling the weary gas of coalmine ventilation that U.S. Sequa company announces in the MEGTEC system.CFRR is referring to Fig. 5, and its operation principle is to adopt reproducible heat exchanger to realize that the energy between the gas-solid transmits and transfer, and catalyst is used to reduce the activation energy of reaction.During real work, the weary gas of mine ventilation is entered by the left side, discharges from the right.A cyclic process is made up of two reverse flow, and each reverse flow is formed half cycles; Suppose that first half circulation is to close when valve 10, valve 9 is opened, and at this moment air-flow passes reactor from the end to the top, at the appointed time (very short usually, about 1 minute), valve 9 is closed, valve 10 is opened, and reverse flow takes place air-flow from the top to bottom, forms a circulation.When beginning to start, by electrical heating elements preheating bed, make central temperature reach firing temperature (1000 ℃), in first half circulation, when mixture surpassed the methane ignition temperature, the oxidation reaction of methane will take place in this moment.If bed is kept this temperature, methane will fully change into carbon dioxide and water.Re burning gases pass the catalyst layer 12 and the heat exchange medium 11 of top then, and with the catalyst layer 12 and the heat exchange medium 11 of heat transferred top.When the reactor inverted air current, the weary gas of new ventilation enters from the top with environment temperature, absorbs heat by heat exchange medium 11 and catalyst layer 12, and near the methyl hydride combustion temperature, burning will take place when arriving reactor center.Pass following catalyst layer 12 and heat exchange medium 11 with the burning gases of after heat, and with the catalyst layer 12 and the heat exchange medium 11 of heat transferred bottom, be used for the preheating of the inlet air flow that the next circulation first half of preheating flows.Test shows, if methane concentration remains on more than 0.15% at least in the inlet air flow, this process will go on automatically.TFRR compares with CFRR referring to Fig. 6, has just lacked catalyst layer, the same CFRR of operation principle.This reaction unit that is used to handle the weary gas of coalmine ventilation also is in the research and development stage at present, does not widely apply in practice, and China does not also have similar techniques.And there is following shortcoming in existing technology: the one, and reverse flow, system complex, restive.The 2nd, part quality is had relatively high expectations, for example valve.The 3rd, the frequent unlatching of valve, stability and security are bad.

Three, utility model content:

The utility model is in order to solve the weak point in the above-mentioned background technology, a kind of combustion reaction device that is used to handle the weary gas of coalmine ventilation is provided, its simple in structure, easy operating, the ventilation of adopting hot combustion product gases preheating newly to advance lacks gas and reduces the activation energy of combustion reaction with catalyst, become reverse intermittent flow into unidirectional continous-stable flows, improved stability, security and the operability of system.

For achieving the above object, the technical solution adopted in the utility model is:

A kind of combustion reaction device that is used to handle the weary gas of coalmine ventilation, its special character is: comprise air inlet area, air inlet area is communicated with the preheating zone, be provided with heat exchanger in the preheating zone, the preheating zone is communicated with the combustion zone, the combustion zone is communicated with the air inlet of heat exchanger in the preheating zone, and the gas outlet of heat exchanger is communicated with exhaust area.

Be provided with the region of activation between above-mentioned preheating zone and the combustion zone.

Be provided with combustion catalyst in the above-mentioned region of activation.

Above-mentioned combustion catalyst can be Pb/Al ₂O ₃Or Pt/Al ₂O ₃Or Pb-Pt/Al ₂O ₃

Be filled with porous inertia heat-storing material in the radiating tube of above-mentioned heat exchanger.

The air inlet of heat exchanger is communicated with by the air channel in above-mentioned combustion zone and the preheating zone.

Above-mentioned preheating zone is communicated with by the air channel with the region of activation.

Above-mentioned heat exchanger can be the fin heat exchanger.

Be provided with heating element heater in the above-mentioned combustion zone, heating element heater can be an electrical heating elements.

Above-mentioned combustion reaction device outer surface is covered with heat-insulation layer.

Compared with prior art, the advantage and the effect that the utlity model has are as follows:

1, the utility model provides a kind of brand-new combustion reactor, its simple in structure, easy operating, adopt the weary gas of ventilation that the combustion product gases preheating of heat newly advances and reduce the activation energy of combustion reaction, the conversion of methane in the weary gas of can continuously, stably realizing ventilating with catalyst;

2, the utility model has fundamentally changed structure of reactor, becomes double-layer catalyst and is arranged as the individual layer layout, has saved the equipment investment expense;

3, the combustion product gases of the utility model employing heat newly advances the weary gas of ventilation by the heat exchanger preheating, has replaced the method with the weary gas of heat exchange medium preheating ventilation, and employing fin heat exchanger has been strengthened the heat exchange effect;

4, the utility model becomes reverse intermittent flow into unidirectional continous-stable flows, and has improved stability, security and the operability of system.Experiment shows that methane concentration is between 0.15-1.0% in the normal pressure and the weary gas that ventilates, and the utility model reaches more than 95% the transformation efficiency of methane.

Four, description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the another kind distortion of the utility model structure;

Fig. 3 is a simplified structure schematic diagram of the present utility model;

Fig. 4 is the another kind distortion of simplified structure of the present utility model;

Fig. 5 is the fundamental diagram of CFRR burner in the background technology;

Fig. 6 is the fundamental diagram of TFRR burner in the background technology.

Five, the specific embodiment:

Operation principle of the present utility model is to adopt the combustion product gases of reflux heat to air inlet, realization is to the preheating of the gas that newly advances to ventilate, and strengthened the heat exchange effect with the fin heat exchanger, catalyst is used to reduce the activation energy of reaction, make it under 350 ℃～800 ℃ cryogenic conditions, the burning that realizes methane transforms, and has formed the unidirectional continuous-flow catalytic combustion reactor of being made up of preheating, activation, combustion order successively.Referring to Fig. 1, comprise air inlet area 1, air inlet area 1 is communicated with preheating zone 2, is provided with the fin heat exchanger in the preheating zone 2, and preheating zone 2 is communicated with region of activation 3, is provided with combustion catalyst in the region of activation 3, and combustion catalyst can be Pb/Al ₂O ₃Or Pt/Al ₂O ₃Or Pb-Pt/Al ₂O ₃, region of activation 3 is communicated with combustion zone 4, is provided with electrical heating elements in the combustion zone 4, and combustion zone 4 is communicated with by air channel 5 with the air inlet of preheating zone 2 interior heat exchangers, and the gas outlet of heat exchanger is communicated with exhaust area 6.In addition, be filled with porous inertia heat-storing material 8 in the radiating tube of heat exchanger, the catalytic combustion reactor outer surface is covered with heat-insulation layer 7.

Referring to Fig. 2, Fig. 2 is the another kind distortion of the utility model structure, and preheating zone 2 is communicated with by air channel 5 with region of activation 3, and combustion zone 4 directly is communicated with the air inlet of preheating zone 2 interior heat exchangers, also within protection domain of the present utility model.

Referring to Fig. 3, Fig. 4, Fig. 3, Fig. 4 are simplified structure form of the present utility model, compare with above-mentioned two figure, do not have region of activation and catalyst.Other structure, the same Fig. 1 of Fig. 3, the same Fig. 2 of Fig. 4 is all within protection domain of the present utility model.

Structure practical work process shown in Figure 1 is: when beginning to start, earlier with electrical heating elements preheating reactor burner zone 4, make its central temperature reach the auto-ignition temperature (1000 ℃) of methane, then, the weary gas of mine ventilation enters reactor with environment temperature from air inlet area 1, at first,, arrive combustion zone 4 combustion reaction takes place again through the region of activation 3 of combustion catalyst is installed by the outside preheating zone 2 that arrives of the core pipe of fin heat exchanger.Then, the burning gases of heat reflux downwards by air channel 5, by the inner heat exchange zone 2 that arrives of the core pipe of fin heat exchanger, after the weary gas generation heat exchange of the ventilation of newly advancing, finally discharge outside the reactor with harmless hot gas.After reaction is normally carried out, heating element heater extinguishes, and the core pipe outside preheating in pre-heater zone 2 from the weary gas of the ventilation elder generation that air inlet area 1 enters passes through the fin heat exchanger absorbs heat, elevate the temperature, through region of activation 3, temperature continues to raise, the 4 places burning in the combustion zone at last, the burning gases of heat are same to reflux downwards, from the core pipe internal flow of heat exchanger, finish the exchange heat with the weary gas that newly advance to ventilate after, discharge reactor again and add to utilize.Methane concentration is at least greater than 0.15% in the weary gas as long as ventilate, and this process will go on automatically.

Claims

1, a kind of combustion reaction device that is used to handle the weary gas of coalmine ventilation, it is characterized in that: comprise air inlet area (1), air inlet area (1) is communicated with preheating zone (2), the preheating zone is provided with heat exchanger in (2), preheating zone (2) is communicated with combustion zone (4), combustion zone (4) is communicated with the air inlet of the interior heat exchanger in preheating zone (2), and the gas outlet of heat exchanger is communicated with exhaust area (6).

2, a kind of combustion reaction device that is used to handle the weary gas of coalmine ventilation is characterized in that: be provided with region of activation (3) between described preheating zone (2) and combustion zone (4).

3, the combustion reaction device that is used to handle the weary gas of coalmine ventilation according to claim 2, it is characterized in that: described region of activation is provided with combustion catalyst in (3).

4, the combustion reaction device that is used to handle the weary gas of coalmine ventilation according to claim 3, it is characterized in that: described combustion catalyst is Pb/Al ₂O ₃Or Pt/Al ₂O ₃Or Pb-Pt/Al ₂O ₃

5, the combustion reaction device that is used to handle the weary gas of coalmine ventilation according to claim 4 is characterized in that: be filled with porous inertia heat-storing material (8) in the radiating tube of described heat exchanger.

6, the combustion reaction device that is used to handle the weary gas of coalmine ventilation according to claim 5, it is characterized in that: described combustion zone (4) are communicated with by air channel (5) with the air inlet of the interior heat exchanger in preheating zone (2).

7, the combustion reaction device that is used to handle the weary gas of coalmine ventilation according to claim 5, it is characterized in that: described preheating zone (2) are communicated with by air channel (5) with region of activation (3).

8, according to claim 6 or the 7 described combustion reaction devices that are used to handle the weary gas of coalmine ventilation, it is characterized in that: described heat exchanger is the fin heat exchanger.

9, the combustion reaction device that is used to handle the weary gas of coalmine ventilation according to claim 8, it is characterized in that: described combustion zone is provided with heating element heater in (4), and heating element heater is an electrical heating elements.

10, the combustion reaction device that is used to handle the weary gas of coalmine ventilation according to claim 8, it is characterized in that: described combustion reaction device outer surface is covered with heat-insulation layer (7).