CN204987042U - Grate and use boiler of this grate - Google Patents
Grate and use boiler of this grate Download PDFInfo
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- CN204987042U CN204987042U CN201520676468.2U CN201520676468U CN204987042U CN 204987042 U CN204987042 U CN 204987042U CN 201520676468 U CN201520676468 U CN 201520676468U CN 204987042 U CN204987042 U CN 204987042U
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- fire grate
- grate
- burner hearth
- boiler
- air
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Abstract
The utility model discloses a grate, the body is equipped with the hollow body of air intake for both ends, sets up singlely or two discharge wind gaps in the one side of body, and the air outlet is round opening, sets up the quantity of air outlet, the pore size of air outlet and the interval of adjacent air outlet according to the material fuel of difference, a boiler that utilizes this grate design is still disclosed, this grate wide application in kitchen range, steam boiler, boiler, industrial stoves field. This grate reasonable in design, simple structure, the cost is with low costs, uses the boiler of this grate design to be a new combustion system, adopt biomass energy, rubbish to be fuel, and the burning is abundant, and green, pollution -free should use widely.
Description
Technical field
The utility model relates to combustion technology, thermal hardware field, is specially a kind of fire grate and directly can uses the biomass fuels such as various crop stalk, faggot, house refuse and can reach a kind of boiler burnt completely.
Background technology
The various crop stalk had a large capacity and a wide range, faggot, the biomass fuels such as house refuse burn because not reaching correct utilization or are embedded in underground and cause serious environmental pollution and the significant wastage of resource, the main cause producing this phenomenon is: thermal power plant uses above-mentioned biomass fuel cost of electricity-generating higher than use coal cost of electricity-generating, can not actively use, Mai Chai specialist is because of the light specific gravity of stalk, volume is large, far away apart from thermal power plant road, cost of transportation is high, remove pick up, pulverize, bundling, the expense such as storage, exert oneself and do not earn money; Although country gives thermal power plant burning straw subsidy, actual use amount is few, and main cause is still the problem of cost of transportation.
Straw-returning can not cause the harm such as insect pest, disconnected ridge by scientific utilization, especially larger in the harm of the area of northern drought; In the long term, stalk is embedded in underground constantly has methane gas to volatilize, and accumulation is many in atmosphere can damage the ozone layer, and temperature is uprised.High extrusion block is made and bar-shaped, block, is granularly needed the conditions such as high temperature, high pressure, binder, and cost is high, and higher than coke, calorific value is 1/3rd of coke to price, and user is difficult to acceptance, few for the current consumption in the aspect such as feed, gas making.
Should use amount maximum be Industrial Boiler and the direct burning straw of heating hot water boiler, because of its convenient transportation, peasant household dispersibles storage, can accomplish to process nearby completely, and plant ash is again first-class environment-friendly fertilizer.But because the existing combustion system of these boilers is restricted, does not reach and burn completely, produce blue smoke, tobacco even black smoke, cause environmental protection can not up to standard and can not get use.Therefore agricultural crop straw peasant must not light burning in field then.
Utility model content
The purpose of this utility model is to provide a kind of fire grate and applies it to a kind of boiler, by rationally adopting fire grate, makes agricultural crop straw sufficient combustion, environmental protection, pollution-free.
The utility model is by the following technical solutions for achieving the above object:
A kind of fire grate, comprise body, described body is the hollow body that two ends are provided with air inlet, arranges single or two discharge air ports in the one side of body, air outlet is circular open, sets out the spacing of the quantity in air port, the pore size of air outlet and adjacent air outlet according to different biomass fuel.
Described body is square structure or circular configuration or ellipsoidal structure.
When arranging two discharge air ports in the one side of body, the air outlet of two rows is crisscross arranged, and wherein arbitrary air outlet of a row, is positioned at another row and is adjacent on the vertical extension line of two air outlet connecting line central points.
The thickness of described body is 3-15mm, and body adopts carborundum or silicon nitride or heat-resisting steels to be made.
Control valve is provided with at the air inlet at body two ends.
An application for fire grate, is applied to steam boiler, hot-water boiler, Industrial Stoves field.When fire grate is applied to cooking stove, steam boiler, hot-water boiler, Industrial Stoves, arrange some layers according to biomass fuel difference and place capacity size, every layer arranges some, and the spacing of the adjacent number of plies is 0.2m-2m.
A kind of boiler, there is above-mentioned fire grate, comprise boiler furnace, boiler furnace comprises burner hearth and burning chamber, top in described burner hearth is provided with mixer, the both sides, top of burner hearth are respectively equipped with air intake and feeding screw, at least two-layer fire grate is provided with in described burner hearth, and the air-out actinal surface of fire grate is towards burner hearth bottom surface, fire grate and boiler furnace removably connect, top layer fire grate top is for putting fuel gasification layer for anti-, the bottom of burner hearth is provided with dump grate, fixed carbon burning zone is formed on the top of dump grate, grey room is provided with in the bottom of dump grate, and grey room is provided with main ash discharging hole, air outlet is provided with in the side of grey room, the furnace outlet of lower furnace portion is connected with burning chamber, burning chamber rear portion is provided with upper drum and lower drum, and upper drum is provided with delivery port, upper drum and lower drum are connected to form natural water circulation by middle convection bank, upper drum is connected to form water circulation by the water-cooling wall of burning chamber and header, the bottom of burning chamber and convection bank is respectively equipped with burning chamber's flying dust expansion chamber and convection bank flying dust expansion chamber, and burning chamber's flying dust expansion chamber and convection bank flying dust expansion chamber are equipped with sedimentation ash discharging hole, two smoke baffle plates are provided with in the middle of convection bank, two smoke baffle plates and convection bank form serpentine discharge flue, exhaust opening successively with economizer and the dedusting and purifying device of outside, air-introduced machine connects.
As preferably, the outer wall of described burner hearth is provided with the furnace wall for heat-insulation and heat-preservation, described burner hearth is provided with at least two observation access doors, and observation access door quantity is consistent with the fire grate number of plies, the top layer fire grate of described burner hearth is square structure fire grate, the fire grate that bottom is arranged is circular configuration fire grate, and described dump grate is provided with rocking handle.
This boiler also can adopt gas-tight silo to send into raw material, and burner hearth is enclosed construction, pressurized firing mode.
Of the present utility model effective: this fire grate is reasonable in design, structure is simple, and cost is low, is widely used in the field of combustion technology such as steam boiler, hot-water boiler, Industrial Stoves.A kind of boiler of fire grate design is used to form a kind of new combustion system, can to various biomass-fuel direct-combustion, save processing charges, such as maize straw is processed into bulk by modes such as extruding, processing charges per ton at least 300 yuan, directly affect the application of user, must cause artificial, electric power, chemical industry adhesive waste, direct combustion is conducive to the cost reducing user; Applied widely, the biomass fuel had a large capacity and a wide range is reached and processes nearby, save cost of transportation; Be applicable to various biomass fuel, as wheat straw, straw, maize straw, cotton stalk, soybean stalk, broomcorn straw tree root, bark, multiclass weeds and flammable house refuse.The plant ash produced after burning is the best potash fertilizer of crops, can improve soil, increases grain yield, reduces fertilizer application, promotes the development of Rural Circulation Economy, improves the living standard in rural area; Compared with multiple Grate-firing, after the ardent solution of combustion matter, reach immediately and mix with the strong of air, be conducive to eliminating smoke; Multilayer fire grate can be established according to specific needs, domestic garbage burning; Burner hearth stage construction reaches cloth wind consistent, do not stay dead angle; Fire grate is compared with chain furnace, vibration stove fire grate reciprocating grate, and fire grate is more simple, saves great deal of steel and reduces boiler manfacturing expense.The utility model is reasonable in design, and cost is low, adopts biomass energy, rubbish to be fuel, and sufficient combustion, environmental protection, pollution-free, should promote the use of.
Accompanying drawing explanation
Fig. 1 is the sectional view of a kind of boiler of the present utility model;
In Fig. 1: 1, boiler furnace, 2, burner hearth, 3, burning chamber, 4, feeding screw, 5, mixer, 6, air intake, 7, fuel gasification layer, 8, fire grate, 9, furnace wall, 10, observe access door, 11, fixed carbon burning zone, 12, air outlet 13, dump grate, 14, ash room, 15, main ash discharging hole, 16, furnace outlet, 17, burning chamber's flying dust expansion chamber, 18, convection bank flying dust expansion chamber, 19, sedimentation ash discharging hole, 20, upper drum, 21, lower drum, 22, water-cooling wall, 23, convection bank, 24, delivery port, 25, smoke baffle plate, 26, exhaust opening, 27, header,
Fig. 2 fire grate of the present utility model (circle) structural representation;
Fig. 3 fire grate of the present utility model (square) structural representation
In Fig. 2, Fig. 3: 801, body, 802, air inlet, 803, air outlet.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is further elaborated.
As shown in Figure 2 and Figure 3, a kind of fire grate, comprises body 801, and the thickness of described body 801 is 3-15mm, and body 801 adopts the high temperature resistant and carborundum of cheapness or silicon nitride or heat-resisting steels to be made, body 801 is provided with the hollow body of air inlet 802 for two ends, in the one side of body 801, single or two discharge air ports are set, air outlet 803 is circular open, the quantity in air port is set out according to different biomass fuel, the pore size of air outlet and the spacing of adjacent air outlet, such as when biomass fuel is stalk, the quantity of air outlet 802 arranges few, aperture is little, the spacing of adjacent air outlet is large, when biomass fuel for the quantity of industry or house refuse air outlet 802 arranges many, aperture is large, the spacing of adjacent air outlet is little, control valve (not shown) is provided with at the air inlet 802 at body 801 two ends, and body 801 is square structure (as Fig. 3) or circular configuration (as Fig. 2) or ellipsoidal structure, when the one side at body 801 arranges two discharge air ports 802, the air outlet 803 of two rows is crisscross arranged, wherein arbitrary air outlet 803 of a row, being positioned at another row is adjacent on the vertical extension line of two air outlet 803 connecting line central points, be 120mm in the preferred distance of the adjacent air outlet 803 of same row, described air outlet 803 is preferably diameter 6-15mm circular open.
Fire grate of the present utility model is mainly used in the field of combustion technology such as cooking stove, steam boiler, hot-water boiler, Industrial Stoves.When fire grate is applied to cooking stove, steam boiler, hot-water boiler, Industrial Stoves, arrange some layers according to biomass fuel difference and place capacity size, every layer arranges some, and the spacing of the adjacent number of plies is 0.2m-2m.
As shown in Figure 1, above-mentioned fire grate is applied a kind of boiler, comprise boiler furnace 1, boiler furnace 1 comprises burner hearth 2 and burning chamber 3, and the top in described burner hearth 2 is provided with mixer 5, for being evenly laid in by raw material in burner hearth 2, the both sides, top of burner hearth 2 are respectively equipped with air intake 6 and feeding screw 4, at least two-layer fire grate 8 is provided with in burner hearth 2, and the air-out actinal surface of fire grate 8 is towards burner hearth bottom surface, fire grate 8 and body of heater removably connect, be convenient to the maintain and replace of fire grate 8, the top layer fire grate 8 of burner hearth 2 is traditionally arranged to be square structure fire grate, two layers below the fire grate 8(top layer fire grate that bottom is arranged, the fire grate of three layers) be circular configuration fire grate, top layer fire grate top is fuel gasification layer 7, the bottom of burner hearth 2 is provided with dump grate 13, dump grate 13 is provided with rocking handle, fixed carbon burning zone 11 is formed on the top of dump grate 13, grey room 14 is provided with in the bottom of dump grate 13, and grey room 14 is provided with main ash discharging hole 15, air outlet 12 is provided with in the side of grey room 14, be beneficial to fixed carbon burning zone 11 sufficient combustion, the outer wall of burner hearth 2 is provided with the furnace wall 9 for heat-insulation and heat-preservation, and burner hearth 2 is provided with at least two observation access doors 10, and observation access door 10 quantity is consistent with fire grate 8 number of plies.
The furnace outlet 16 of burner hearth 2 bottom is connected with burning chamber 3, burning chamber 3 rear portion is provided with upper drum 20 and lower drum 21, and upper drum 21 is provided with delivery port 24, upper drum 20 and lower drum 21 are connected to form natural water circulation by middle convection bank 23, upper drum 20 is connected to form water circulation by the water-cooling wall 22 of burning chamber 3 with header 27, the bottom of burning chamber 3 and convection bank 23 is respectively equipped with burning chamber's flying dust expansion chamber 17 and convection bank flying dust expansion chamber 18, and burning chamber's flying dust expansion chamber 17 and convection bank flying dust expansion chamber 18 are equipped with sedimentation ash discharging hole 19, two smoke baffle plates 25 are provided with in the middle of convection bank 23, two smoke baffle plates 25 form serpentine discharge flue with convection bank 23, exhaust opening 26 successively with economizer and the dedusting and purifying device of outside, air-introduced machine (not shown) connects.
This boiler also can adopt gas-tight silo to substitute feeding screw and send into raw material, and gas-tight silo is provided with inside and outside two flashboards, and now burner hearth is enclosed construction, pressurized firing mode.
The operation principle of a kind of boiler of the utility model: 1), first by baler, raw material (stalk, straw, rubbish etc.) is squeezed into cuboid or cylinder, then sends into feeding screw with elevator; Raw material is sent into burner hearth by feeding screw, (this structure is negative-pressure firing, and burner hearth is open type, boiler as shown in Figure 1); When feeding style adopts gas-tight silo, gas-tight silo is provided with inside and outside two flashboards, and outer flashboard is opened, and interior flashboard cuts out, and stalk sends into gas-tight silo, closes outer flashboard, flashboard in opening, and burner hearth sent into by raw material, (this structure is pressurized firing, and burner hearth is enclosed);
2), the raw material that enters burner hearth stirs through burner hearth inner top mixer and to be laid on the fire grate of top layer (general adopt square structure fire grate), and the thickness of laying is generally avoided wearing thorax wind air excess at 500-1500mm().
3) if fruit structure is negative-pressure firing, burner hearth is open type, and then open air-introduced machine (not shown), light stalk, burner hearth be negative pressure state, and air is from stalk top and the suction of fire grate two ends air-vent; If structure is pressurized firing, burner hearth is enclosed, at unlatching air-introduced machine, lights stalk, opens air blast simultaneously, and air is forced to enter from stalk top and fire grate two ends air-vent;
4) after, stalk is lighted, under air-introduced machine effect, flame is descending, form anti-burning, temperature is reaching more than 200 degree, start to discharge fugitive constituent in a large number, because air is under the thickness drag of 500-1500mm stalk, air undersupply, air and the fugitive constituent of the now some air vent ejections in the bottom of top layer fire grate are mixed to form flame;
5), flame is descending, and when air undersupply, second layer fire grate bottom vents sprays air again, further with fuel gas mixed combustion.
6), flame continue descending, as the undersupply of air, third layer fire grate fill into again air further with fuel gas mixed combustion, 4th layer of fire grate is in like manner set, layer 5 fire grate, until sufficient combustion, completely, arrange the number of plies of fire grate according to combustion case and material component.
The main component of the caloric value of such as stalk is fugitive constituent 60-65%, fixed carbon content 10-15%, stalk loses mechanical strength after fugitive constituent is released in the burning of ground floor fire grate, and drop on dump grate, when reaching the thickness of about 200mm, the suitable air quantity of feeding is impelled after-flame by the air outlet of ash room, shakes dump grate and puts ash entrance chamber, can discharge from main ash discharging hole after reaching certain thickness.
7), stalk releases the fugitive constituent flame that the flame that produces and fixed carbon burning produce that burn and converges at burner hearth bottom, and enter burning chamber through furnace outlet, form the radiation heat release to front and back water-cooling wall, the flying dust of sedimentation falls into the grey expansion chamber of burning chamber.
8), flue gas enters convection bank, forms convection heating surface by upper and lower drum and convection bank, and flue gas is divided into transversal flow and forms serpentine and flow out boiler furnace by smoke baffle plate, continues sedimentation flying dust and falls into convection bank ash expansion chamber.
9), flue gas enter after convection bank heat release economizer (not shown) continue heat release, in economizer, flue-gas temperature is generally at about 160 degree.
10), flue gas completes whole heat release after going out economizer, continues to enter dedusting, purifier, enters air finally by air-introduced machine.
Obviously, embodiment described above is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Claims (8)
1. a fire grate, comprises body, it is characterized in that, described body is the hollow body that two ends are provided with air inlet, and arrange single or two discharge air ports in the one side of body, air outlet is circular open.
2. a kind of fire grate according to claim 1, is characterized in that, body is square structure or circular configuration or ellipsoidal structure.
3. a kind of fire grate according to claim 1, it is characterized in that, when arranging two discharge air ports in the one side of body, the air outlet of two rows is crisscross arranged, wherein arbitrary air outlet of a row, is positioned at another row and is adjacent on the vertical extension line of two air outlet connecting line central points.
4. a kind of fire grate according to claim 1, is characterized in that, the thickness of described body is 3-15mm, and body adopts carborundum or silicon nitride or heat-resisting steels to be made.
5. a kind of fire grate according to claim 1, is characterized in that, is provided with control valve at the air inlet at body two ends.
6. a boiler, there is the fire grate as described in claim 1-5 any one, comprise boiler furnace, it is characterized in that, boiler furnace comprises burner hearth and burning chamber, top in described burner hearth is provided with mixer, the both sides, top of burner hearth are respectively equipped with air intake and feeding screw, at least two-layer fire grate is provided with in described burner hearth, and the air-out actinal surface of fire grate is towards burner hearth bottom, fire grate and boiler furnace removably connect, top layer fire grate top is fuel gasification layer, the bottom of burner hearth is provided with dump grate, fixed carbon burning zone is formed on the top of dump grate, grey room is provided with in the bottom of dump grate, and grey room is provided with main ash discharging hole, air outlet is provided with in the side of grey room, the furnace outlet of lower furnace portion is connected with burning chamber, burning chamber rear portion is provided with upper drum and lower drum, and upper drum is provided with delivery port, upper drum and lower drum are connected to form natural water circulation by middle convection bank, upper drum is connected to form water circulation by the water-cooling wall of burning chamber and header, the bottom of burning chamber and convection bank is respectively equipped with burning chamber's flying dust expansion chamber and convection bank flying dust expansion chamber, and burning chamber's flying dust expansion chamber and convection bank flying dust expansion chamber are equipped with sedimentation ash discharging hole, two smoke baffle plates are provided with in the middle of convection bank, two smoke baffle plates and convection bank form serpentine discharge flue, exhaust opening successively with economizer and the dedusting and purifying device of outside, air-introduced machine connects.
7. a kind of boiler according to claim 6, it is characterized in that, the outer wall of described burner hearth is provided with the furnace wall for heat-insulation and heat-preservation, described burner hearth is provided with at least two observation access doors, and observation access door quantity is consistent with the fire grate number of plies, the top layer fire grate of described burner hearth is square structure fire grate, and the fire grate that bottom is arranged is circular configuration fire grate, and described dump grate is provided with rocking handle.
8. a kind of boiler according to claim 6, is characterized in that, this boiler adopts gas-tight silo to send into raw material, and burner hearth is enclosed construction, pressurized firing mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520676468.2U CN204987042U (en) | 2015-09-01 | 2015-09-01 | Grate and use boiler of this grate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520676468.2U CN204987042U (en) | 2015-09-01 | 2015-09-01 | Grate and use boiler of this grate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204987042U true CN204987042U (en) | 2016-01-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520676468.2U Expired - Fee Related CN204987042U (en) | 2015-09-01 | 2015-09-01 | Grate and use boiler of this grate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204987042U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107228482A (en) * | 2016-03-24 | 2017-10-03 | 无锡锡能锅炉有限公司 | Biomass steam boiler system |
| CN110411018A (en) * | 2019-08-02 | 2019-11-05 | 张德忠 | A kind of whole helpless wind of packet direct combustion of stalk circles round hot air boiler without heat exchange two-chamber |
-
2015
- 2015-09-01 CN CN201520676468.2U patent/CN204987042U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107228482A (en) * | 2016-03-24 | 2017-10-03 | 无锡锡能锅炉有限公司 | Biomass steam boiler system |
| CN110411018A (en) * | 2019-08-02 | 2019-11-05 | 张德忠 | A kind of whole helpless wind of packet direct combustion of stalk circles round hot air boiler without heat exchange two-chamber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20160901 |
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| CF01 | Termination of patent right due to non-payment of annual fee |