CN88211043U

CN88211043U - Double bed combustion gas generator

Info

Publication number: CN88211043U
Application number: CN 88211043
Authority: CN
Inventors: 赵兆云
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-01-25
Filing date: 1988-01-25
Publication date: 1988-11-23

Abstract

The utility model relates to double bed combustion gas generating furnace. The utility model can be matched with the generator of generator diesel oil gas engine, and can supply the gas for civil use and the industrial gas. The utility model adopts two combustion fire beds assembled in one furnace body, and the; an upper fire bed is arranged at the upper part of the double bed combustion gas generating furnace with the forward combustion mode that both the gasifying agent and the gas flow downward; a lower fire bed is arranged at the bottom of the double bed combustion gas generating furnace with the reverse combustion mode which is formed by that the gasifying agent flows upward and the coal gas flows downward. The gasifying area of the double bed combustion can be enlarged one time; the gasifying rate is increased; the heat value is 2000 large calorie / cubic meter; the decomposition of tar is thorough with little pollution. The utility model uses a steam clip cover to make heat radiation on water; after the double bed combustion, the ash slag of the coal has low carbon content (Chz< 10%) and high thermal efficiency.

Description

Double bed combustion gas generator

The utility model proposes a kind of can be double bed coal combustion gas producer with supporting use of diesel-gas engine generator and the producer gas generator that can supply domestic gas and industrial coal gas.

It in the prior art fixed bed coal gas producer, it has only a fire bed of burning, working process as water-gas generators is interrupted, about 4 minutes is one-period, alternately send air and water vapour in stove, send air is in order to burn, to improve its grate temperature, at this moment flue gas is emptying, and sending water vapor is to make C+H ₂O → CO+H ₂, its caloric power of gas can reach 2580 kilocalories/mark rice ³, but furnace thermal efficiency is very low, has only 50-55%.Make the producer gas generator of vaporized chemical with the mixed gas of air and water vapor, its calorific value is low to be about 1420 kilocalories/mark meter ³, the comparable above-mentioned height of furnace thermal efficiency has only 70%, the carbon content of cinder height, and furnace thermal efficiency is low, and gasification efficiency is low.

The purpose of this utility model is the problem at above-mentioned existence, proposes a kind of double bed coal combustion gas producer, and pneumatization can increase and is twice, and promptly vaporization rate also doubles; Calorific value is that the mean value of above-mentioned two kinds of stoves of the prior art can reach 2000 kilocalories/mark rice ³, calorific value level in reaching; The tar complete decomposition is polluted little; The hot blast chuck, pressure decatizing gas chuck, heat radiation is few, carbon content of cinder low (ChZ＜10%), thermo-efficiency height.

Technical solution of the present utility model: two grates are arranged in a body of heater, and specifically, two grates are meant grate and following grate.Last grate is on stove top, i.e. the coal seam of coal-stopping loop more than 7, its highly about 0.9 meter.Can be divided into fresh fuel layer, fuel drying layer, zone of oxidation, reducing zone from top to bottom.Following grate is in lower furnace, i.e. the coal seam of coal-stopping loop more than 7, about 1.1 meters of its coal seam height (comprising ash bed).Be divided into ash bed, zone of oxidation, reducing zone from bottom to top.Shell is a jacket steam boiler 3, hot well tank 20 is arranged on the furnace roof, there is coal supply auger 2 furnace side, stove is with hot blast chuck 5 outward, the stove waist has ring gas outlet pipe 6, the furnace bottom of jacket steam boiler 3 has fixed grate 11, the water-cooled axle 4 that passes its center is a lower support with fixed grate 11, base plate with hot well tank 20 is a upper support, tighten several coal poking rods 18 and rotary fire grate 10 at water-cooled axle 4, there is the transmission mechanism 13 of its lower end to drive, water inlet pipe 14 is contained in the lower end of water-cooled axle 4, be connected with union 12, rising pipe 21 is equipped with in water-cooled axle 4 upper ends, rising pipe 21 outlets are over against the import of hot well tank 20, water wall 8 is arranged at the bottom of jacket boiler, water wall 8 upper ends connect jacket boiler 3 lower ends and connect header 17, the waist of jacket boiler 3 is with ring gas outlet pipe 6 outward, encircling the waist inboard is support with water wall 8, supporting coal-stopping loop 7, hot blast chuck 5 is in the outermost of jacket boiler 3, the side towards the fire of hot blast chuck 5 is covered with refractory concrete wall 19 in the high-temperature zone, there is coal supply auger 2 furnace side, and its coal outlet links to each other with coal supply inclined tube 1 in the side of furnace roof hot well tank 20, there is heating duct 9 in jacket boiler 3 outsides, the upper end links to each other with hot well tank 20 interior coal supply inclined tubes, and the lower end links to each other with fan 16, and the fan outlet has two, in another ashcan below fixed grate 11, the import of fan 16 connects hot blast chuck 5.

Accompanying drawing is a structure iron of the present utility model.

Among the figure 1 is the coal supply inclined tube, the 2nd, the coal supply auger, the 3rd, the jacket steam boiler, the 4th, the water-cooled axle, the 5th, the hot blast chuck, the 6th, the ring gas outlet pipe, the 7th, coal-stopping loop, the 8th, water wall, the 9th, heating duct, the 10th, rotary fire grate, the 11st, fixed grate, the 12nd, union, the 13rd, the fire grate transmission mechanism, the 14th, water inlet pipe, the 15th, vapour pipe, the 16th, fan, the 17th, header, the 18th, coal poking rod, the 19th, the refractory concrete wall, the 20th, hot well tank, the 21st, rising pipe, I is the fresh fuel layer, II is the destructive distillation layer, III is a zone of oxidation, IV is a reducing zone, I, II, III is last grate, V is an ash bed, III, IV, V is from top to bottom for following grate.

Working process is as follows:

Body of heater has jacket boiler 3 supportings, and the water vapor of generation can be used as vaporized chemical.

Outside the jacket boiler 3, hot blast chuck 5 is arranged, send in the stove as vaporized chemical by fan 16 with air heating, coal is sent in the stove from the coal supply inclined tube 1 of furnace roof hot well tank 20 by auger 2, lime-ash is by dropping on the fixed grate 11 and rotary fire grate 10 generation relative movement, and the bulk slag is crowded broken, falls into ashcan.

Water-cooled axle 4 and coal poking rod 18 are driven by rotary fire grate 10, rotation together, and the Tower Bridge that the coal seam can be bondd is abolished, and can squeeze broken bulk lime-ash simultaneously and the ashcan that removes the gred, thereby guarantees the normal operation continuously of stove.Water coolant is by the lower end water inlet pipe 14 of water-cooled axle 4.Introduce, water outlet enters furnace roof hot well tank 20 by water-cooled axle 4 top rising pipes 21, and hot well tank 20 and jacket boiler 3 have flange seal, and be excessive to prevent air-flow, and can absorb radiant heat in the stove.

The coal gas that produces boosts dispatch to the user from the loop turn gas outlet tube 6 of stove waist by vacuum fan.

Be embodiment of the present utility model below:

Freezing air is after 5 heating of hot blast chuck, mixing is sent into an amount of steam from vapour pipe 15 and is joined, the coal of being sent here by auger 2 is sent in the stove from the coal supply inclined tube 1 of the hot well tank 20 of furnace roof together, coal is piled distance hot well tank 1 bottom 300mm from fixed grate always more than 11, two places, coal seam ignition simultaneously on furnace roof coal seam and the fire grate, the very fast rising of two place's temperature reaches red heat.New coal adds continuously in the auger 2, after the new coal seam of furnace roof is dried, discharges volatile matter and tar thermal decomposition product immediately, move down together, reach high temperature oxide layer, this layer temperature further raise, produce a large amount of carbonic acid gas, oxygen is very fast depleted in the air, and the water vapor of bringing into also decomposes rapidly.The main chemical reactions formula is as follows:

Because the rotation of rotary fire grate 10 and the relative movement between the fixed grate 11, the bulk slag is squeezed broken, fall into ashcan, the interior whole coal seam of stove is moved down, because vaporized chemical is from top to down, so the zone of oxidation of furnace roof moves up gradually relatively (its absolute high change is little), make fervid charcoal layer enter reducing zone, the main chemical reactions formula is as follows:

Because reduction reaction absorbs heat, the coke and the flue-gas temperature that move down reduce gradually, and response speed also slows down gradually, and reach stove waist coal-stopping loop 5 place's temperature and are about about 500 ℃, are taken away by vacuum fan from gas outlet tube 6.

Coke has been full of lower furnace body, arrive the zone of oxidation of bottom coke after hot blast is heated from fixed grate 11 behind ash bed, produce acutely burning, the coke layer temperature raises rapidly and makes the upper strata coke crimson once more, form the reducing zone of grate down, the water-gas of generation is also discharged from furnace bosh portion.The lime-ash that has burnt enters ashcan by fixed grate 11.

The utility model is two heat, and is middle cold, the gas production multiplication, and the lime-ash burn-out degree is high, and gasifying agent can be sent into from furnace roof, furnace bottom simultaneously; Coal gas exports from waist continuously.

Claims

1, a kind of by coal supply inclined tube 1, auger 2, jacket steam boiler 3, rotation, fixed grate 10,11, fire grate transmission mechanism 13, water inlet pipe and water outlet pipe 14,21, heating duct 9, hot well tank 20, the double bed coal combustion gas producer that fan 16 grades are formed, it is characterized in that two fire bed of burning are arranged in a body of heater, the outer hot blast chuck 5 that is with at producer, the waist of producer has ring gas outlet pipe 6, is 4 compositions of water-cooled axle of lower support by the coal-stopping loop 7 of water wall 8 supportings and with fixed grate 11.

2, double bed coal combustion gas producer according to claim 1, it is characterized in that two fire bed of burning are meant upper and lower grate, last grate is on stove top, be the coal seam of coal-stopping loop more than 7, comprise that fresh fuel layer I, destructive distillation layer II, zone of oxidation III, reducing zone IV constitute, following grate is in lower furnace, and promptly the coal seam of coal-stopping loop below 7 comprises that reducing zone IV, zone of oxidation III, waste residue layer V constitute.