CN215637224U

CN215637224U - Catalytic combustion device

Info

Publication number: CN215637224U
Application number: CN202120808431.6U
Authority: CN
Inventors: 张宗权; 宋永花; 于尚
Original assignee: Kunshan Renjuren Purification Equipment Co ltd
Current assignee: Kunshan Renjuren Purification Equipment Co ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2022-01-25
Anticipated expiration: 2031-04-20

Abstract

The utility model discloses a catalytic combustion device, which relates to the technical field of waste gas treatment and comprises a catalytic combustion furnace body, an air inlet pipe, a gas concentration detector and a temperature sensor, the utility model relates to a catalytic combustion furnace, which comprises a PLC (programmable logic controller) and a cold-supplementing mechanism, wherein a catalytic chamber and a heating chamber are sequentially arranged in a catalytic combustion furnace from top to bottom, an air inlet pipe is connected with the heating chamber, a gas concentration detector extends into the catalytic combustion furnace, a temperature sensor extends into the catalytic chamber, the PLC is arranged on the outer wall of the catalytic combustion furnace and electrically connected with the gas concentration detector and the temperature sensor, the cold-supplementing mechanism comprises a cold-supplementing pipe, the cold-supplementing pipe is connected with the catalytic chamber, a cold-supplementing electromagnetic valve is arranged on the cold-supplementing pipe and electrically connected with the PLC.

Description

Catalytic combustion device

Technical Field

The utility model relates to the technical field of waste gas treatment, in particular to a catalytic combustion device.

Background

The industrial waste gas treatment refers to the work of pre-treating waste gas generated in industrial places such as factories and workshops before the waste gas is discharged to the outside so as to reach the national standard of the external discharge of the waste gas. The industrial waste gas treatment principle includes various principles such as an activated carbon adsorption method, a catalytic combustion method, a catalytic oxidation method, an acid-base neutralization method, biological washing, a biological trickling filtration method, a plasma method and the like. The waste gas treatment tower adopts a quintuple waste gas adsorption, filtration and purification system, and the industrial waste gas treatment design is thorough, the waste gas is purified and filtered layer by layer, and the effect is better.

The catalytic combustion method is a common waste gas treatment method, a corresponding catalytic combustion device is generated, and organic waste gas can be oxidized and decomposed into CO at a lower ignition temperature by virtue of a catalyst₂And H₂And O, when the gas concentration in the device approaches 1/4 explosion lower limit or the temperature of the catalytic chamber exceeds the upper limit, the gas inlet source needs to be diluted, the service life of the device is protected and prolonged, and accidents are prevented.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a catalytic combustion device, which can automatically dilute an air inlet source according to time and avoid accidents caused by manual judgment errors.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a catalytic combustion device, including the catalytic combustion furnace body, the intake pipe, gas concentration detector, a weighing sensor and a temperature sensor, PLC controller and benefit cold mechanism, catalytic chamber and heating chamber have set gradually from the top down in the catalytic combustion furnace body, the intake-tube connection heating chamber, gas concentration detector stretches into in the catalytic combustion furnace body, a weighing sensor and a temperature sensor stretch into in the catalytic chamber, the PLC controller sets up at catalytic combustion furnace body outer wall, the PLC controller all with gas concentration detector and temperature sensor electric connection, it includes the benefit cold pipe to benefit cold mechanism, the catalysis chamber is connected to the benefit cold pipe, be provided with the benefit cold solenoid valve on the benefit cold pipe, benefit cold solenoid valve and PLC controller electric connection.

Preferably, the catalytic combustion furnace body top is provided with the connecting pipe, and the connecting pipe is connected with movable flange, and movable flange is connected with the delivery pipe, and delivery pipe export direction is the horizontal direction, is provided with the emission solenoid valve on the delivery pipe, discharges solenoid valve and PLC controller electric connection.

Preferably, a catalytic bed is arranged in the catalytic chamber, a plurality of drawer frames are arranged on the catalytic bed from top to bottom, and a plurality of honeycomb catalysts are arranged on the drawer frames.

Preferably, a heating element is arranged between adjacent drawer frames, and the heating element structure is composed of a plurality of S sections.

Preferably, a heat exchanger is provided in the heating chamber.

Preferably, one end of the heating chamber, which is far away from the air inlet pipe, is connected with a first circulating pipe, the catalysis chamber is connected with a second circulating pipe, the first circulating pipe is communicated with the second circulating pipe, the first circulating pipe and the second circulating pipe are simultaneously connected with an exhaust pipe, the exhaust pipe is connected with an exhaust fan, and the exhaust fan is connected with a desorption air pipe.

Preferably, a circulation electromagnetic valve is arranged on the first circulation pipe and electrically connected with the PLC.

Preferably, flame arresters are arranged on the first circulating pipe and the air inlet pipe.

Preferably, the catalytic combustion furnace body is provided with an explosion-proof opening close to the heating chamber.

The utility model has the beneficial effects that:

1. when the gas concentration detector detects that the gas concentration is close to 1/4 explosion lower limit or the temperature sensor detects that the temperature of the catalytic chamber exceeds the upper limit, the gas concentration detector can send a signal to the PLC controller, the cold compensation electromagnetic valve is opened, fresh air is introduced into the catalytic chamber through the cold compensation pipe, and meanwhile the effects of cooling and diluting an air inlet source are achieved, so that intelligent management is achieved, accidents caused by manual judgment errors are avoided, and safety is guaranteed.

2. The discharge pipe can rotate freely under the action of the movable flange, so that the device can adapt to installation on various different fields and is flexible to operate.

Drawings

In order to more clearly illustrate the detailed description of the utility model or the technical solutions in the prior art, the drawings that are needed in the detailed description of the utility model or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic structural diagram of a catalytic combustion device according to the present invention;

FIG. 2 is a schematic structural diagram of a top view of FIG. 1;

FIG. 3 is a schematic left side view of FIG. 1;

fig. 4 is a schematic view of the structure of the heating element of the present invention.

Reference numerals:

the device comprises a catalytic combustion furnace body, a catalytic chamber, a heating chamber, a gas inlet pipe, a gas concentration detector, a PLC (programmable logic controller), a 7-cold compensating mechanism, a 7.1-cold compensating pipe, a 7.2-cold compensating electromagnetic valve, an 8-connecting pipe, a 9-movable flange, a 10-discharge pipe, an 11-discharge electromagnetic valve, a 12-drawer frame, a 13-honeycomb catalyst, a 14-heating element, a 15-heat exchanger, a 16-first circulating pipe, a 17-second circulating pipe, an 18-exhaust pipe, a 19-exhaust fan, a 20-desorption gas pipe, a 21-circulating electromagnetic valve, a 22-flame arrester, a 23-explosion-proof opening and a 24-temperature sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally arranged when the products of the present invention are used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operated, and thus, should not be construed as limiting the present invention.

Example 1

As shown in fig. 1-4, this embodiment provides a catalytic combustion device, including catalytic combustion furnace body 1, intake pipe 4, gas concentration detector 5, temperature sensor 24, PLC controller 6 and cold-patch mechanism 7, from the top down has set gradually catalytic chamber 2 and heating chamber 3 in the catalytic combustion furnace body 1, intake pipe 4 connects heating chamber 3, intake pipe 4 is used for letting in waste gas, gas concentration detector 5 stretches into in the catalytic combustion furnace body 1, temperature sensor 24 stretches into in the catalytic chamber 2, PLC controller 6 sets up at catalytic combustion furnace body 1 outer wall, PLC controller 6 all with gas concentration detector 5 and temperature sensor 24 electric connection, cold-patch mechanism 7 includes cold-patch pipe 7.1, cold-patch pipe 7.1 connects catalytic chamber 2, be provided with cold-patch solenoid valve 7.2 on the cold-patch pipe 7.1, cold-patch solenoid valve 7.2 and PLC controller 6 electric connection.

In this embodiment, the device is in the operation process, when gas concentration detector 5 detected that gas concentration is close 1/4 explosion lower limits, or when temperature sensor 24 detected 2 temperatures in catalysis room and exceeded the upper limit, all can send a signal to PLC controller 6, open cold supplementation solenoid valve 7.2, let in fresh air or air conditioning through cold supplementation pipe 7.1 in to catalysis room 2, play simultaneously and cool down and carry out the effect of diluting to the source of admitting air, realize intelligent management, avoid artifical judgement error to cause unexpected the emergence, the security has been ensured.

Specifically, 1 top of catalytic combustion furnace body is provided with connecting pipe 8, and connecting pipe 8 is connected with movable flange 9, and movable flange 9 is connected with delivery pipe 10, and delivery pipe 10 export direction is the horizontal direction, is provided with emission solenoid valve 11 on the delivery pipe 10, emission solenoid valve 11 and 6 electric connection of PLC controller.

Clean gas generated after catalytic combustion is discharged through the discharge pipe 10, the discharge electromagnetic valve 11 can be opened through the PLC 6, and then the clean gas can be discharged, so that intelligent management is facilitated, the discharge pipe 10 needs to be connected to a main discharge chimney on an actual installation site, the actual installation direction of the discharge pipe 10 is not fixed according to spatial arrangement, and therefore the discharge pipe 10 can be rotated freely through the movable flange 9, installation of various different installation environments can be adapted, and operation is flexible.

Specifically, be provided with the catalytic bed in the catalysis room 2, catalytic bed is last from the top down to be provided with a plurality of drawer frames 12, all is provided with a plurality of honeycomb catalyst 13 on the drawer frame 12, and drawer frame 12 conveniently draws out honeycomb catalyst 13 and changes, is provided with heating element 14 between the adjacent drawer frame 12, and heating element 14 structure comprises for a plurality of S sections, guarantees to heat fully evenly, and heating element 14 can be electric heating pipe, is provided with heat exchanger 15 in the heating chamber 3.

In operation, the heating element 14 is first heated to preheat the honeycomb catalyst 13 inside the catalytic bed and simultaneously generate a certain amount of hot air, and the heating chamber 3 heats the gas to the ignition temperature required by catalytic combustion and enters the catalytic bed. Due to the honeycomb catalyst 13, the start temperature of the exhaust gas combustion is about 250-,the combustion temperature is greatly lower than 670-. The organic components are converted into non-toxic and harmless CO under the action of the honeycomb catalyst 13₂And H₂And O, simultaneously releasing a large amount of heat, enabling the high-temperature gas to enter the heat exchanger 15 again, preheating the analyzed high-concentration waste gas, maintaining the ignition temperature required by catalytic combustion, basically avoiding the need of additional energy consumption (heat energy) in the waste gas combustion process, and recycling part of heat for the analysis and regeneration of the activated carbon in the activated carbon adsorption device (not shown in the figure), thereby greatly reducing the energy consumption.

Catalytic combustion is a typical gas-solid phase catalytic reaction, and is essentially deep oxidation with active oxygen. In the catalytic combustion process, the honeycomb catalyst 13 has the function of reducing activation energy, and meanwhile, the surface of the honeycomb catalyst 13 has an adsorption function, so that reactant molecules are enriched on the surface, the reaction rate is increased, and the reaction is accelerated. The honeycomb catalyst 13 can be used to oxidize and decompose organic waste gas into CO at a low ignition temperature₂And H₂And O, simultaneously releasing a large amount of heat energy, thereby achieving the method for removing the harmful substances in the waste gas.

The catalytic chamber 2 can be divided into multiple stages, an organic waste gas source reaching the temperature condition enters a first-stage catalytic reaction chamber, the first catalytic reaction chamber adopts a drawer type, a honeycomb catalyst 13 is arranged in the first-stage catalytic reaction chamber, a heating element 14 is arranged in the middle of the first-stage catalytic reaction chamber, the temperature of the catalyst reaches the reaction temperature by utilizing the heat energy radiation principle, partial organic matters are decomposed, energy is released, the temperature of the waste gas is directly increased, a third temperature increasing part designed by the device is called catalytic temperature rise, the organic gas after temperature increase enters a catalytic bed, the honeycomb catalyst 13 is arranged in the third temperature increasing part, the organic gas meeting the reaction condition is completely decomposed, and the waste gas becomes clean gas.

It should be noted that, here, the heat exchanger 15 is used for performing heat exchange between the heat energy generated by the decomposition of the organic gas and the cold air flow of the exhaust gas source, so as to replace the heat energy and increase the temperature of the exhaust gas source. When exhaust gas concentration reaches a definite value, effect through heat exchanger 15, can guarantee the device normal operating under the state of no operating power, carry out temperature hoisting device for the first time to the waste gas source among the catalytic purification device, also be one of the energy-conserving facility in the equipment, through the inside reasonable control to the air current of heat exchanger 15, make the efficiency assurance of heat exchanger 15 more than 60%, its structure adopts the cold-rolled steel sheet system, reasonable arrangement, make the comprehensive contact of cold and hot air current carry out the energy replacement, all makings make and accept according to national "steel pressure vessel manufacture standard". The honeycomb catalyst 13 uses honeycomb ceramics as a carrier, and precious metals of platinum and palladium are impregnated in the carrier, so that the honeycomb catalyst has the characteristics of high activity, high purification efficiency, high temperature resistance, long service life and the like.

The main technical performance parameters of the honeycomb catalyst 13 are as follows:

overall dimension	100×100×50mm
		Size of hole	∮1.3mm
Density of holes	25.4 pieces/cm²
		Wall thickness of hole	0.5mm
Deep main crystal phase	γ—Al2O3
		Specific surface area	43m²/g
Bulk density	0.8g/cm³
		Airspeed	2×10⁴h^-1
Temperature of catalyst activity	210℃
		Impact temperature resistance	750℃

Specifically, one end of the heating chamber 3, which is far away from the air inlet pipe 4, is connected with a first circulating pipe 16, the catalysis chamber 2 is connected with a second circulating pipe 17, the first circulating pipe 16 is communicated with the second circulating pipe 17, the first circulating pipe 16 and the second circulating pipe 17 are simultaneously connected with an exhaust pipe 18, the exhaust pipe 18 is connected with an exhaust fan 19, and the exhaust fan 19 is connected with a desorption air pipe 20. The first circulation pipe 16 is provided with a circulation electromagnetic valve 21, and the circulation electromagnetic valve 21 is electrically connected with the PLC controller 6.

The desorption air pipe 20 can be matched and connected with the activated carbon adsorption device, the generated heat enters the activated carbon adsorption device through the first circulating pipe 16 and the second circulating pipe 17 through the exhaust fan 19 and the desorption air pipe 20, the saturated activated carbon in the activated carbon adsorption device is desorbed and desorbed, and organic matters are desorbed from the activated carbon, so that the continuous production is promoted, and the energy-saving effect is improved.

Specifically, all be provided with spark arrester 22 on first circulating pipe 16 and the intake pipe 4, spark arrester 22 is used for opening the dangerous separation between device and the waste gas source, guarantees the safety between processing apparatus and the apparatus for producing, detaches the dust in the waste gas source simultaneously, and spark arrester 22 structure can be the ripple net type, refers to the national standard and makes, changes swiftly, and the clearance is convenient, is one of the safety device in this device.

Specifically, the catalytic combustion furnace body 1 is provided with an explosion-proof opening 23 near the heating chamber 3, so that the safety is improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

1. A catalytic combustion device, comprising:

the catalytic combustion furnace body is internally provided with a catalytic chamber and a heating chamber from top to bottom in sequence;

the air inlet pipe is connected with the heating chamber;

the gas concentration detector extends into the catalytic combustion furnace body;

the temperature sensor extends into the catalytic chamber;

the PLC is arranged on the outer wall of the catalytic combustion furnace body and is electrically connected with the gas concentration detector and the temperature sensor;

the cold supplement mechanism comprises a cold supplement pipe, the cold supplement pipe is connected with the catalytic chamber, a cold supplement electromagnetic valve is arranged on the cold supplement pipe, and the cold supplement electromagnetic valve is electrically connected with the PLC.

2. The catalytic combustion device of claim 1, wherein the top of the catalytic combustion furnace body is provided with a connecting pipe, the connecting pipe is connected with a movable flange, the movable flange is connected with a discharge pipe, the outlet direction of the discharge pipe is horizontal, the discharge pipe is provided with a discharge electromagnetic valve, and the discharge electromagnetic valve is electrically connected with the PLC.

3. A catalytic combustion device according to claim 1, wherein a catalytic bed is arranged in the catalytic chamber, a plurality of drawer frames are arranged on the catalytic bed from top to bottom, and a plurality of honeycomb catalysts are arranged on the drawer frames.

4. A catalytic combustion unit as claimed in claim 3 wherein heating elements are provided between adjacent drawer frames, the heating elements being constructed in a plurality of S-sections.

5. A catalytic combustion unit as claimed in claim 3, wherein a heat exchanger is provided within the heating chamber.

6. The catalytic combustion device of claim 5, wherein the heating chamber is connected to a first circulation pipe at an end away from the inlet pipe, the catalytic chamber is connected to a second circulation pipe, the first circulation pipe is communicated with the second circulation pipe, the first circulation pipe and the second circulation pipe are connected to an exhaust pipe, the exhaust pipe is connected to an exhaust fan, and the exhaust fan is connected to a desorption air pipe.

7. The catalytic combustion device as claimed in claim 6, wherein the first circulation pipe is provided with a circulation solenoid valve, and the circulation solenoid valve is electrically connected with the PLC controller.

8. A catalytic combustion unit as claimed in claim 6 wherein flame arrestors are provided in both the first circulation duct and the inlet duct.

9. A catalytic combustion unit as claimed in claim 1 wherein the catalytic combustion furnace body is provided with an explosion-proof port adjacent the heating chamber.