CN2379198Y

CN2379198Y - Equipment for purifying high temp. flue gas

Info

Publication number: CN2379198Y
Application number: CN 95211379
Authority: CN
Inventors: 钟礼晖
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-05-19
Filing date: 1995-05-19
Publication date: 2000-05-24
Anticipated expiration: 2005-05-19

Abstract

The utility model relates to a device for purifying high-temperature fume, which relates to a device for eliminating fume exhausting pollution for boilers burning oil and coal, diesel generator sets and Oil-burning ranges in kitchens of restaurants and hotels. The utility model is composed of an inlet flue interface, a sedimentation chamber, a high temperature resistant granules filtring bed, a catalytic reaction bed, a reverse blowing machine, a combined wind channel, a dust hopper, a dust exhausting valve and a supporting frame mechanism. The utility model has the advantages of simple structure, high automatization, convenient operation and maintenance, and the smoke purifying rate of the utility model for the oil fume is 90-95 percent; the purifying rate for sulfur dioxide, carbon monoxide, hydrocarbon, nitrous oxides, etc. can reach 80-95 percent.

Description

The high-temperature flue gas purification machine

The utility model relates to eliminates fuel oil, coal-burning boiler, the device of diesel generating set and restaurant hotel kitchen Oil-burning range smoke-discharging pollution.

Industrial fuel oil, coal-burning boiler, the important source of diesel generating set and restaurant hotel kitchen Oil-burning range smoke evacuation having become urban atmospheric pollution.Except that containing a large amount of carbon black and dust, also contain hydrocarbon (CH), carbon monoxide (CO), sulfur dioxide (SO in its smoke evacuation ₂) and nitrogen oxide pernicious gases such as (NOx).And its flue-gas temperature generally reaches 200 ℃～500 ℃ high temperature.

Carbon black in removing smoke, dust, existing many method and apparatus.For example: use mechanical collector, filtration dust catcher and electric cleaner etc., can eliminate carbon black in the flue dust and dust more than 90%.But, can not eliminate pernicious gases such as carbon monoxide, sulfur dioxide, hydrocarbon and nitrogen oxide.Adopt wet scrubber, and in cleaning solution, add suitable absorbent, not only can eliminate carbon black and dust, and can eliminate pernicious gases such as sulfur dioxide and nitrogen oxide and pollute.But, can bring sewage, cause secondary pollution, and it is higher to consume energy, flue-gas temperature must be reduced to below 80 ℃ simultaneously, thereby make process for purifying become complicated.Adopt the catalytic conversion method, pollute though can eliminate pernicious gases such as CO, CH and NOx, and do not have secondary pollution.But, carbon black and dust in but can not removing smoke.And carbon black, dust concentration in flue gas reach 0.5mg/m ³When above, catalyst can be covered by flue dust and gradually because of SO ₂Poison and lose activity.

The purpose of this utility model is to provide carbon black, dust in a kind of new can removing smoke, CO, CH, SO in removing smoke again ₂The device that pollutes with pernicious gas such as NOx.

Feature of the present utility model is that it is the pan of crossing of one with collection high temperature filtration function and catalyzed conversion function that this machine has the flue interface that can supply with desulfurizing agent and reducing agent automatically, and the blowback wind automatic ash removing mechanism in the automatic conversion air channel of a cover energy is arranged.

Can supply with the flue interface of desulfurizing agent and reducing agent automatically, be to be made of smoke-intake pipe and two storage bin(hopper)s, and the feed pipe of storage bin(hopper) and the angle of flue are 25～30 °, and the section ratio of feed pipe and flue is 1: 10.

The filter chamber is then independently crossed the pan stack and is divided into the multicell structure by dividing plate by a plurality of, and each is crossed pan and is combined into separate unit by high-temperature resistant particle filter bed and honeycomb catalytic bed again.

The high-temperature resistant particle particle diameter is 1.3～3mm, and loading height is 80～100mm, and the honeycomb substrate percent opening is 300 hole/square inches, makes the activity of such catalysts component with platinum, palladium.

Blowback wind automatic ash removing mechanism is made of back blowing machine, combination air channel and automaton, and back blowing machine is installed on bottom, combination air channel, and the blower fan import is communicated with smokejack, and outlet is communicated with the blowback air channel, forms circulation air path with the filter chamber.

At the back blowing machine air inlet, an adjusting air-valve is housed, when exhaust gas temperature is higher than 250 ℃, can open the adjusting air-valve, introduce cold wind, to reduce blowback wind-warm syndrome degree below 250 ℃.

This device is made of flue interface, expansion chamber, high-temperature resistant particle filter bed, catalytic bed, back blowing machine, combination air channel, dust hopper, dust discharge valve and timbering machine.On the flue interface, the storage bin(hopper) of two energy autofeeds has been installed.One of them is equipped with CaO desulfurizing agent micro mist, and another is equipped with reducing agents such as kerosene or liquefied ammonia.When flue gas with certain pressure and wind speed when the flue interface enters expansion chamber, desulfurizing agent and reducing agent in the storage bin(hopper) are inhaled into expansion chamber by feed pipe under the flue gas ejector action, through with enter the filter chamber after flue gas fully mixes and filter, carbon black in the flue gas, dust and CaO micro mist at first are filtered out, simultaneously, the SO in the flue gas ₂In filtering bed, fully contact, react, generate calcium sulfate (CaSO with desulfurizing agent ₄) and be adsorbed, thereby reach the purpose of eliminating flue dust and desulfurization.Carbon monoxide in the flue gas (CO), CH and NOx carry out oxidation and reduction reaction on catalyst.CO, CH are oxidized to carbon dioxide (CO ₂) and water (H ₂O), NOx is reduced into nitrogen N under the reducing agent effect ₂And CO ₂With H ₂O.Thereby flue gas is purified completely.

Accompanying drawing 1～4 is the detailed structure view by the concrete device that the utility model proposes.Wherein: Fig. 1 is that profile Fig. 2 of high-temperature flue gas purification machine of the present utility model is that outline drawing Fig. 3 of high-temperature flue gas purification machine of the present utility model was that detailed structure view Fig. 4 of pan is the view of inlet flue duct interface, among the figure: 1. flue interface; 2. expansion chamber; 3. dust hopper; 4. dust discharge valve; 5. desulfurizing agent storage bin(hopper); 6. reducing agent storage bin(hopper); 7. cross pan; 8. air-valve cylinder (hydraulic cylinder); 9. pan support; 10. back blowing machine; 11. support; 12. adjusting air-valve; 13. dividing plate; 14. blowback air channel; 15. combination air-valve chamber; 16. smokejack; 17. side plate; 18. stainless (steel) wire; 19. honeycomb catalyst; 20. filter chamber's sidewall paneling; 21. high-temperature resistant particle filtrate; 22. muscle sheet; 23. pan support; 24. upper flange; 25. smoke-intake pipe; 26. storage bin(hopper) charge door (air intake aditus laryngis); 27. feed pipe; 28. desulfurizing agent storage bin(hopper); 29. reducing agent storage bin(hopper); 30. lower flange

As shown in the figure, on the top of expansion chamber 2 flue interface 1 is installed. Two storage bin(hopper)s have been installed on the flue interface 1 5 and 6, feed pipe and flue angle are 25 °～30 °, and section ratio is 1: 10 (seeing accompanying drawing 3 for details), the expansion chamber bottom with Dust hopper 3 connects into an integral body. The upper valve body of the bottom of dust hopper 3 and dust discharge valve is welded into one, and pulls open plate, can Flue dust in the dust hopper and waste residue are discharged. Be connected and be welded into overall structure by the filter chamber between expansion chamber and the combination air channel. The filter chamber is crossed the pan stack and is divided into multicell by dividing plate 13 by a plurality of according to the needs of processing air force, and be equipped with every chamber An excessively pan 7 (detailed construction is seen accompanying drawing 3) of being combined by high-temperature resistant particle filter bed and honeycomb catalytic bed. Be welded with the support 9 that angle steel is made on filter chamber's sidewall, cross pan 7 and be installed on it, leaned on the upper flat of pan bottom surface and support 9 Face fits tightly and seals. Cross pan 7 and be welded into frame-shaped construction by four blocks of side plates 1, the muscle sheet 6 of four frame bottoms and right-angled intersection Be welded into one, honeycomb catalyst places on the muscle sheet 6, and the honeycomb catalyst top is pushed down with two layers of stainless (steel) wire 2,2 of steel meshes Cross pan 7 and be separated into up and down two lattice, the high-temperature resistant particle filtrate of upper semi-lattice filling certain altitude, its particle diameter is 1.3～3mm, The catalyst carrier percent opening is 300 hole/square inches, makes the active constituent of catalyst with platinum, palladium. The combination air channel is by back-blowing Road 14, central authorities combination air-valve chamber 15 and smokejack 16 are welded into stand-alone assembly, and by combination air-valve chamber 15 and filter chamber Connection also is welded into it overall structure, in bottom, combination air channel, is equipped with back blowing machine 10, its air inlet and smokejack 16 Be communicated with, outlet is communicated with blowback air channel 14, forms circulation air path with the filter chamber. In the blower fan inlet end, be provided with adjusting wind Valve 12 is opened this valve, can allocate cold wind into, to reduce the back-blowing temperature, makes it below 250 ℃, guarantees blower fan safety Work.

When the carbon black in the flue gas, dust in the particle filtering bed, accumulate to a certain amount of, and when causing particle filtering bed resistance excessive, Air-valve auto-changing air channel in the combination air channel, back-blowing is in sequence to each layering particle filtering bed back-blowing, through honeybee The equal wind of nest catalyst carrier is all pressed, and makes the high-temperature resistant particle filtrate in the filter bed be fluidized state, thereby accumulating in filter bed Carbon black, dust and calcium sulfate waste residues in the layer is blown into expansion chamber and falls into dust hopper, and so constantly circulation makes gas cleaning Process successively and not can stop up. Regularly open the dust discharge valve of dust hopper, flue dust and desulfurization slag can be discharged.

The utility model is compared with the equipment of existing various improvement flue dust, has following characteristics:

1, adopts high-temperature resistant particle filter bed and the measure of catalytic bed double purified, not only can eliminate flue dust, and can eliminate carbon monoxide (CO), hydrocarbon (CH), sulfur dioxide (SO₂) and nitrogen oxide (NOx) etc. have The evil gaseous contamination. Thereby be a kind of ideal equipment of comprehensive regulation smoke contamination.

2, because purification is thorough, thereby the waste gas after this machine purified treatment can at low-altitude discharged, needn't set up high vacant duct Cause the roof discharging, not only saved engineering cost, and can protect city look and feel to exempt from destruction.

3, process for purifying simple flow directly purifies various 200 ℃～500 ℃ high-temperature flue gas with the utility model Process, need not increase cooling system, non-wastewater discharge, non-secondary pollution.

4, simple in structure, safe and reliable, the automaticity height has automatic ash removing function, does not stop up, noncoking the operation dimension Protect easy.

5, the processing air quantity is big, and resistance is littler, and operation power consumption and cost are relatively low.

6, applied widely, not only can be used for industrial fuel oil, coal-burning boiler, the purified treatment of diesel generating set and kitchen range smoke evacuation, and can be used as the smoke and dust treatment corollary equipment of the metallurgical furnace of various discharging high-temperature flue gas and cellar for storing things stove etc.

Embodiment: 1000KW diesel generating set Fume purifier.Generator rating power 1000KW, diesel engine model: comings K50 series A C1250 type, 253.9 cubic metres/minute of diesel exhaust gas flows, 502 ℃ of delivery temperatures, pressure at expulsion 10200Pa, it is 15000 cubic metres/hour that selected high-temperature flue gas purification machine is handled air quantity, the smoke inlet temperature is not higher than 500 ℃, 11 square metres of the filter bed gross areas, and particle filter bed particle diameter of filter medium is 1.3～3mm, loading height is 80～100mm, catalyst is selected platinum for use, palladium ceramic honeycomb catalyst, ceramic honey comb percent opening are 300 hole/square inches, 1.5 cubic metres of catalyst amounts, desulfurizing agent is selected the CaO micro mist for use, and reducing agent is a kerosene.Back blowing machine model Y5-48-5C, 4067～8075 cubic metres/hour of air quantity, total head 159 to 226mm water columns, 2800 rev/mins of rotating speeds, power of motor 7.5KW.Clarifying smoke rate 90～95%, CO, CH, SO ₂With NOx purifying rate 80～95%.

Claims

1, a kind of industrial fuel oil, coal-burning boiler, the high-temperature flue gas purification machine of diesel generating set and the smoke evacuation of restaurant hotel kitchen Oil-burning range, this machine by flue interface, expansion chamber, dust hopper, dust discharge valve, cross pan, combination air channel, back blowing machine and be configured to, it is characterized in that it is the pan of crossing of one with collection high temperature filtration function and catalyzed conversion function that this machine has the flue interface that can supply with desulfurizing agent and reducing agent automatically, and the blowback wind automatic ash removing mechanism in the automatic conversion air channel of a cover energy is arranged.

2, according to the described high-temperature flue gas purification machine of claim 1, it is characterized in that to supply with automatically the flue interface of desulfurizing agent and reducing agent, be to constitute by smoke-intake pipe and two storage bin(hopper)s, the feed pipe of storage bin(hopper) and the angle of flue are 25 ° to 30 °, and the section ratio of feed pipe and flue is 1: 10.

3, according to the described high-temperature flue gas purification machine of claim 1, it is characterized in that the filter chamber is divided into the multicell structure by a plurality of independently mistake pan stacks and by dividing plate, each is crossed pan and is combined into separate unit by high-temperature resistant particle filter bed and honeycomb catalytic bed.

4, according to the described high-temperature flue gas purification machine of claim 1, the high-temperature resistant particle particle diameter that it is characterized in that pan is 1.3 to 3mm, and loading height is 80 to 100mm, and the honeycomb substrate percent opening is 300 hole/square inches, makes the activity of such catalysts component with platinum, palladium.

5, according to the described high-temperature flue gas purification machine of claim 1, it is characterized in that its blowback wind automatic ash removing mechanism is made of back blowing machine, combination air channel and automaton, back blowing machine is installed on bottom, combination air channel, the blower fan import is communicated with smokejack, outlet is communicated with the blowback air channel, forms circulation air path with the filter chamber.

6, according to the described high-temperature flue gas purification machine of claim 1, it is characterized in that the back blowing machine air inlet is equipped with an adjusting air-valve, when exhaust gas temperature is higher than 250 ℃, can open the adjusting air-valve, introduce cold wind, to reduce blowback wind-warm syndrome degree below 250 ℃.