CN2209675Y - Rotary kiln raw meal powder tower type double-heat transfering cyclone heat exchanger and collector - Google Patents

Abstract

The utility model relates to an air motive power thermotechnical device for producing cement in a dry process method, to a cyclone heat exchanger which makes use of kiln tail residual heat to heat dry raw material power to increase the production and a dust collector and a deduster which make use of discharge gas of the heat exchanger to dry raw material after purified; particularly a cyclone heat exchanger with high yield and stable production and a dust collector and a deduster which can run high efficiently and stably. Because the utility model solves the problem of the adhesion of dew points under the condition of high temperature, two heat transferring surfaces are formed. The utility model has combination performance, changes connection tubes to form the two cyclones and can compose single-double tubes, single-double stages and series and parallel connection; the utility model can be used for construction materials, fire resistance, metallurgy, etc.

Description

Rotary kiln raw meal powder tower type double-heat transfering cyclone heat exchanger and collector

The utility model, relate to cement dry method production aerodynamic force Thermal Equipment, a kind of kiln tail waste heat that utilizes, heat dried raw material powder, improve interchanger and a kind of interchanger waste gas that utilizes of grog output, purify especially a kind of whirlwind heat exchanger of can high yield, again can stable yields of dust-precipitator, the fly-ash separator (following general designation dust-precipitator) of back drying material, with a kind of can be efficient, cyclone that again can steady running.

Whirlwind heat exchanger (heating or cooling), dust-precipitator, two kinds of whirlwind, a kind of design, the utility model, property capable of being combined is arranged, change whirlwind and import and export adapter, can form above-mentioned two kinds of whirlwind that function is different, and various work patterns: as single, double pipe, single, double level, series and parallel, material is not limit.

Can be used for industries such as cement, pottery, talcum powder, building materials, metallurgy, fire-resistant, casting, glass.

At present, existing technology rotary kiln is used level Four or five-stage whirlwind interchanger, and output is increased substantially, so external the fifties, domestic the eighties is being promoted, though kind is a lot, advantage is similar, and shortcoming is identical, be exactly can high yield, can not stable yields, stop up easily, keep in repair also very because of difficulty.Make to promote and be restricted.

At present, existing technology cyclone, because of movement-less part, simple and easy to do, can realize efficiently, but under hot conditions, move soon that air quantity descends, the performance shakiness, because of it is connected with above-mentioned whirlwind heat exchanger, purifying exhaust air is so also be to influence the unsteady factor of interchanger output.

In a word: at present, existing technology whirlwind heat exchanger can high yield, can not stable yields, and existing technology cyclone can be efficient but under hot conditions, can not steady running, and these two kinds of whirlwind, two problems of existence, problem to be solved in the utility model just.

Now, analyze, show these two kinds of whirlwind of technology, the reason of these two problems occurs; They all are to move under the hot conditions, and the cause of disease has three: one, dew point bonding; Two, wall hole eddy current; Three, discharge gate is collaborated.All cause cyclonic air flow speed irregular change, cause whirlwind performance shakiness: the above two, cause resistance to rise, main swirling eddy descends, and is difficult to keep high separating efficiency, and required centrifugal force descends output; At hot flue gas and between expecting that the powder solid surface is long-pending, be a heat-transfer surface (the utility model claims that this is first heat-transfer surface) simultaneously, also be difficult to keep high heat transfer efficient, the fierce degree of required normal turbulent flow descends the material temperature; The latter, discharge gate is collaborated, and causes main swirling eddy to make progress at a high speed, rolls the material powder, keeps rising, and does not have output.

Have a look the latter earlier, the discharge gate problem of collaborating, existing technology will prevent very difficult, as establishes the discharge airtight valve, the Yin Gaowen easy burn-out; As only establishing dipleg, or the optimum regime discharge gate bleeds, design balance, but being in operation because of above-mentioned the above two problem, cause whirlwind performance shakiness, and be difficult to realize, so collaborate incessantly.

Have a look the above two again: one. dew point bonding, two. wall hole eddy current is accompanied, in existing technology whirlwind, the dew point bonding is serious again rapidly, the perforate on cyclone body of having to, if many places pressurized air is chewed, hand-hole, ash drawing hole etc., cause producing extra eddy current, local collection ash increases, and resistance rises, weakened the energy of main swirling eddy, output descends, and heat transfer efficiency reduces, and the material temperature descends.

At last, emphasis is had a look the cause of disease: one. the dew point bonding; Its appearance is unavoidable, because of existing technology, dried raw material powder, through level Four or five-stage whirlwind interchanger, can give heat to about 700 ℃, (because of fuel and combustion system different different), the waste gas that goes out interchanger gas also has about 280 ℃, enters cyclone and purifies two kinds of whirlwind walls, internal-external temperature difference is so big, dew point must appear, though very thick thermal insulation layer, wearing layer are arranged, start because of each, the material wall layer is cold, along with flue gas dew point raises, and the wall layer thickening, the increase of falling property of heat, temperature-rise period elongates, and sticking ash increases, so, the dew point bonding appears in existing technology, and is unavoidable.

Find out from above analysis three causes of disease: existing technology whirlwind, under hot conditions, cause the output shakiness, the unsteady crucial cause of disease of performance is the dew point bonding, key issue also to be solved in the utility model just.

The purpose of this utility model is: design a kind of whirlwind heat exchanger, cyclone under hot conditions, can prevent dew point bonding, prevents that drainage conduit from collaborating, and reaches: can high yield, and also can stable yields; Can be efficient, also can aim of stable operation.Simultaneously, device should have associativity, changes whirlwind and imports and exports and take over the position, can form the whirlwind of above-mentioned two kinds of different purposes, also can form the different operating pattern, as single tube, two-tube, single-stage, twin-stage, series, parallel.Tower (individual layer, multilayer, shape are regardless of), the load-bearing insulation construction reduces and takes up an area of, and assembly is prefabricated, and above material is not limit, and gathers materials on the spot as far as possible.

The purpose of this utility model realizes like this:

At first, design an independence device " the two heat transfer unit (HTU)s of equality of temperature wall ", its structure is: in a tower load-bearing insulation framying thing, the number of plies, shape, material is not limit, every layer is a Room, and every chamber has one to isolate awl (or plate), and this chamber is divided into two, logical high temperature smoke pipe becomes smoke-box above the awl, and the control valve attemperation is arranged, the dress whirlwind makes gas flow temperature in the whirlwind in the smoke-box, and is identical with the outer temperature of whirlwind wall, character is basic identical, constitutes on " equality of temperature wall ", has eliminated flue gas dew point bonding in the whirlwind.

Simultaneously, the whirlwind high-temperature wall surface is that the effect of second heat-transfer surface shows, because, in whirlwind, the two phase flow of high speed rotating, between hot flue gas and low temperature powder surface are long-pending, front the utility model, appellation " first heat-transfer surface ", at this moment, flue gas loss of heat and lowering the temperature is again in high speed rotating.Contact repeatedly with high-temperature wall surface, De Re and heating up expects powder in addition, is subjected to centrifugal action bigger, rub repeatedly with high-temperature wall surface and hot, so the utility model claims whirlwind high-temperature wall surface meaning " second heat-transfer surface ", constitute " two heat transfer " face.Strengthened heat-transfer capability.

The device design has associativity; change whirlwind and import and export the adapter position, can form the whirlwind of above-mentioned two kinds of different purposes; every kind of whirlwind; can form the different operating pattern, as single tube, two-tube, single-stage, twin-stage, series, parallel etc.; equipment can give system; do not limit with material, whirlwind can be used for heating, cooling, cleaner production, protection environment, can be used for industries such as cement, pottery, talcum powder, building materials, metallurgy, fire-resistant, casting, glass.

Secondly; a design dependency device " airtight discharging stabilizing deyice " below the whirlwind discharge gate; be contained in and isolate in the following moist closet of awl; this chamber temperature is lower; with protection equipment; its structure is: stable hopper, airtight blow-off valve, dipleg (being used for the very high I level of temperature), the little motor that shakes of pipe peripheral hardware are arranged, and the subcontrol blanking prevents that discharge gate from collaborating.

Once more, design second dependency device " purging apparatus for examination and repair ", its structure is: on the whirlwind vapor pipe, below discharge gate, correspondence is respectively established and is purged mouth.

Below " in conjunction with the accompanying drawings and example, the utility model is further specified:

1. tremie pipes, 2. waste pipes are (with dust-precipitator among the figure, the blower fan series connection) 3. whirlwind 4. pipe connectings 5. drainage conduit 6. are stablized hopper 7. airtight blow-off valve (gravity, electronic, pneumatic) 8. little motor 10. kiln feeding machines 11. awls that shake of dipleg 9. isolate awl 16. hand-holes 17. awls with dipleg 12. smoke exhaust pipe 13. control valves, 14. tower frame and access opening 15. purge mouthful and hand hole 20. moist closets and door 21. smoke-boxes 22. right smoke-intake pipe 23. left smoke-intake pipe 24. ventilating smoke tubes 25. kiln tail petticoat pipe I mouthfuls 19. time with purging to purge on mouthful 18. whirlwind. II. III. IV. expression one is to level Four.

Drawing shows: at the rotary kiln tail, a two-tube Category Four cyclone interchanger is worked, and for simplicity's sake, presses the single tube narration, and is respectively described below with regard to cigarette road, material road; Material Lu Weiyi road, from top to bottom, material, cigarette parallel connection enter whirlwind heating at different levels, go into kiln at last, and flow process is:

Dried raw material powder, fall into pipe connecting (4) with oncoming by filling tube (1), III level whirlwind (3) exhaust, the phase impulse disperses, and the parallel connection of material cigarette enters in the IV level whirlwind (3), after being heated, separates again in material, through drainage conduit (5), stablize the airtight blow-off valve of hopper (6) (7), fall into pipe connecting (4), with II level whirlwind (3) exhaust, the parallel connection of material cigarette enters the III level, and so, material is heated from IV to I level whirlwind, the dried raw material powder of heat, fall into dipleg (8),, fall into kiln feeding machine (10) by little motor that shakes (9) subcontrol blanking.

The cigarette road is a two-way, from bottom to top, and the two-way parallel connection.One the tunnel enters tower each layer of structures smoke-box, and another road enters in the whirlwind at different levels, makes progress separately, the useless pipe discharge of begging of going forward side by side, and flow process is:

The smoke-box heating: high-temperature flue gas by kiln tail petticoat pipe (25), through ventilating smoke tube (24), enters I level whirlwind smoke-box (21), so series connection makes progress, and each layer smoke-box all is full of hot flue gas, the smoke-box temperature, regulate by control valve (13),, advance waste pipe (2) and discharge through smoke exhaust pipe (12);

Whirlwind internal heating: high-temperature flue gas, by kiln tail petticoat pipe (25) through left smoke-intake pipe (23) (in parallel (22) slightly), rise and oncoming material powder, dash mutually to swash mutually and disperse, the parallel connection of material cigarette, enter in the I level whirlwind (3), to expect to separate again after the heating, flue gas rises through pipe connecting, and so series connection upwards, through IV level whirlwind (3), advance waste pipe (2) and discharge;

When overhaul of the equipments, by purging mouthful (18) on the whirlwind, reach corresponding purging mouth and hand hole (19), purge with pressurized air, all the other are standby as door, access opening, hand-hole etc.

Claims (3)

1, a kind of heating, the whirlwind heat exchanger of the usefulness that cools, with a kind of cyclone that purifies usefulness, fly-ash separator (following general designation dust-precipitator), two kinds of whirlwind, a kind of design, it is characterized in that: one " the two heat transfer unit (HTU)s of equality of temperature wall " are arranged, its structure is: (the number of plies in a tower load-bearing insulation framying thing, shape, material is not limit), every layer is a Room, every chamber has one to isolate awl (or plate), this chamber is divided into two, logical high temperature smoke pipe becomes smoke-box above the awl, and the control valve attemperation is arranged, dress whirlwind in the smoke-box, also logical high-temperature flue gas in the whirlwind makes the inside and outside flue-gas temperature of whirlwind wall identical, constitutes on " equality of temperature wall ";

Simultaneously, the whirlwind high-temperature wall surface, it is second heat-transfer surface: flue gas in the whirlwind, and between the material powder solid surface that enters whirlwind is long-pending, be first heat-transfer surface, because of heating the flue gas that powder is lowered the temperature, and under centrifugal action, the powder that rubs repeatedly with wall all can get hot and heats up from second heat-transfer surface, constitutes " two heat transfer " face;

Device has associativity, changes whirlwind and imports and exports the adapter position, can form interchanger or dust-precipitator, and various work patterns, as single, double pipe, and single, double level, series and parallel, material is not limit.

2, according to claim 1, described whirlwind heat exchanger, dust-precipitator are below the whirlwind discharge gate, it is characterized in that: one " airtight discharging stabilizing deyice " arranged, be contained in and isolate in the following moist closet of awl, its structure is: stable hopper, airtight blow-off valve are arranged, or dipleg, and little motor that shakes.

3, according to claim 1, described whirlwind heat exchanger, dust-precipitator is characterized in that: one " purging apparatus for examination and repair " arranged, its structure is: on the whirlwind vapor pipe, if purge mouth on the whirlwind, on the stable hopper below the whirlwind dust-exhausting port, correspondence is set and is purged mouth and hand hole.

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