CN211695394U - Reverse burning type steam hot blast stove - Google Patents
Reverse burning type steam hot blast stove Download PDFInfo
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- CN211695394U CN211695394U CN202020286068.1U CN202020286068U CN211695394U CN 211695394 U CN211695394 U CN 211695394U CN 202020286068 U CN202020286068 U CN 202020286068U CN 211695394 U CN211695394 U CN 211695394U
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A back-burning type steam hot-blast stove comprises a stove body and a grate, wherein the grate is arranged at the inner lower part of the stove body and divides the inside of the stove body into a hearth and an ash collecting chamber; the furnace body is provided with a furnace door and a slag removal port, the inner upper part of the furnace body is provided with a partition board, and the partition board divides the inner top of the furnace body into smoke chambers; the lower part of the secondary combustion chamber is communicated with the ash collecting chamber, and the upper part of the secondary combustion chamber is communicated with the smoke distributing chamber; the upper part of the hearth is provided with a primary oxygen inlet, and the lower part of the secondary combustion chamber is provided with a secondary oxygen inlet; the top of the furnace body is provided with a heat exchange cavity, and the top of the heat exchange cavity is provided with a smoke collection chamber; the smoke collection chamber is communicated with the smoke distribution chamber through a heat exchange pipe in the heat exchange cavity; the smoke collecting chamber is provided with a smoke outlet; the lower part of one side of the heat exchange cavity is provided with an air inlet connected with the blower, and the upper part of the other side of the heat exchange cavity is provided with a hot air outlet; the fire grate is a pipe fire grate which can be communicated with water, and the fire grate is communicated with the steam collecting box. The hot blast stove has the advantages of full fuel combustion and high heat conversion efficiency.
Description
Technical Field
The utility model relates to a heating equipment technical field specifically is a reverse combustion type steam hot-blast furnace.
Background
Low carbon, English islow carbonMeaning lower (lower) greenhouse gas (carbon dioxide dominated) emissions. With the development of the world industrial economy, the dramatic increase of population, the unlimited rise of human desire and the unlimited rise of production life style, the world climate faces more and more serious problems, the emission of carbon dioxide is increased, the earth ozone layer is suffering from unprecedented crisis, and the global catastrophic climate change is frequent, so that the living environment and the health and safety of human beings are seriously damaged. Even ifGDP, which has been once introduced as a luxury and rapidly growing or expanding, is also greatly discounted due to environmental pollution, climate change (and thus, countries have called a development pattern and statistical manner of "green GDP").
The low-carbon economy refers to an economic development form which can achieve win-win purposes of economic and social development and ecological environment protection by reducing the consumption of high-carbon energy such as coal and petroleum and the like as much as possible and reducing the emission of greenhouse gases through various means such as technical innovation, system innovation, industrial transformation, new energy development and the like under the guidance of a sustainable development concept. The low-carbon economy is an economic mode based on low energy consumption, low pollution and low emission, and is another great progress of human society after agricultural culture and industrial culture.
The hot blast stove is a heating device commonly used by people for drying materials, heats an air pipe by utilizing fuel combustion, heats cold air in the air pipe into hot air, and finally dries the materials by utilizing the discharged hot air. Agricultural and sideline products are subjected to enzyme deactivation and drying most typically, and hot air and steam are needed when the agricultural and sideline products are subjected to enzyme deactivation and drying; and agricultural and sideline products are water-removing and drying at present, one device is required to provide hot air, the other device is required to provide steam, the equipment investment cost is high, a large amount of fuel is wasted, and the requirements of energy conservation and environmental protection are not met.
Disclosure of Invention
The utility model aims at providing a can be simultaneously for agricultural and sideline products de-enzyming and drying provide steam and hot-blast anti-formula steam hot-blast furnace that burns, should burn anti-formula steam hot-blast furnace fuel fully, can not produce black flue gas, and heat conversion efficiency is high.
In order to realize the purpose of the utility model, the technical scheme who takes is:
the counter-burning type steam hot blast stove has three technical schemes:
the first method comprises the following steps: a kind of back-fire water-cooled steam hot-blast furnace, including furnace body and fire grate, the fire grate is set up in the inferior part of the furnace body, divide the inside of the furnace body into burner hearth and dust collecting chamber; the furnace body is provided with a furnace door and a slag removal port, the inner upper part of the furnace body is provided with a partition board, and the partition board divides the inner top of the furnace body into smoke chambers; the hot blast stove also comprises a secondary combustion chamber, the secondary combustion chamber is arranged outside the hearth, and the chamber wall of the secondary combustion chamber is connected with the stove body into a whole; the lower part of the secondary combustion chamber is communicated with the ash collecting chamber through a fire hole, and the upper part of the secondary combustion chamber is communicated with the smoke separating chamber through a smoke hole; the upper part of the hearth is provided with a primary oxygen inlet, and the lower part of the secondary combustion chamber is provided with a secondary oxygen inlet; the top of the furnace body is provided with a heat exchange cavity, and the top of the heat exchange cavity is provided with a smoke collection chamber; the smoke collection chamber is communicated with the smoke distribution chamber through a plurality of heat exchange tubes arranged in the heat exchange cavity; the smoke collecting chamber is provided with a smoke outlet connected with the induced draft fan; the lower part of one side of the heat exchange cavity is provided with an air inlet connected with the air blower, and the upper part of the other side of the heat exchange cavity is provided with a hot air outlet; the fire grate is a pipe fire grate which can be communicated with water, and the fire grate is communicated with the steam collecting box. The air to be heated enters the heat exchange cavity from the air inlet, the heat in the tail gas is transferred to the air in the heat exchange cavity through the heat exchange tube, and the heated air is discharged from the hot air outlet and conveyed to the drying room to dry agricultural and sideline products.
Preferably: the fire grate consists of a plurality of longitudinal heat exchange tubes, and two ends of each longitudinal heat exchange tube penetrate through the furnace body and are fixed in the furnace body in an inclined angle of 5-10 degrees; the lower end of the longitudinal heat exchange tube is communicated with a transverse water distribution tube, and the high end of the longitudinal heat exchange tube is communicated with a transverse steam collection tube; the transverse steam collecting pipe is communicated with the lower part of the steam collecting box through a steam guide pipe. The horizontal water distribution pipe is also provided with a sewage draining outlet. The inclination angle of the longitudinal heat exchange tubes is beneficial to the automatic upward movement of steam generated in the grate and the removal of moisture in the later grate. The fuel can heat the longitudinal heat exchange tube in the combustion process, the water of the longitudinal heat exchange tube is heated through heat transfer, the generated steam is collected through the steam collecting box, and then the steam is conveyed into the drying room to carry out enzyme deactivation and drying on agricultural and sideline products.
The fire grate can be provided with a single-layer fire grate and a double-layer fire grate according to the requirement of steam production; the double-layer grate is arranged, namely two groups of longitudinal heat exchange tubes are arranged, wherein the upper group and the lower group of longitudinal heat exchange tubes are respectively arranged, the lower ends of the two groups of longitudinal heat exchange tubes are respectively communicated with one transverse water distribution tube, the two transverse water distribution tubes are also mutually communicated, the high ends of the two groups of longitudinal heat exchange tubes are respectively communicated with one transverse steam collection tube, and the two transverse steam collection tubes are also mutually communicated.
Preferably: the heat exchange cavity is cylindrical or elliptic cylindrical, the air inlet is arranged on the quadrant point at the lower part of the heat exchange cavity and is tangent to the normal direction of the cylindrical surface of the heat exchange cavity, air enters the heat exchange cavity from the air inlet under the negative pressure action of the air blower, the air forms spiral whirlwind in the heat exchange cavity and moves in a spiral curve manner, the heat exchange time and the stroke are improved by 2-3 times, and the heat conversion efficiency is greatly improved.
Preferably: the furnace body is provided with a cavity which can contain water and is communicated with the fire grate. When the fuel is combusted in a reverse combustion mode, a large amount of heat is generated to be in contact with the fire grate and the furnace wall, water in the cavity is heated and evaporated to generate steam, and the steam is generated continuously and stably along with the continuous generation of combustion. Meanwhile, the water in the cavity also has a cooling effect on the fire grate and the furnace wall, so that the service life is prolonged.
The fuel (biomass fuel) enters the hearth from the furnace door, a certain negative pressure is kept below the fuel (biomass fuel) relative to the upper part of the fuel (biomass fuel) under the action of the negative pressure of the induced draft fan, the air inlet is positioned at the upper side (higher than the furnace door) of the hearth, the air enters from the upper part of the fuel (biomass fuel), and the fuel (biomass fuel) is combusted in the upper combustion chamber (hearth) above the grate assembly under the support of the grate assembly to form reverse combustion; in the combustion process, fuel (biomass fuel) which is not completely combusted and scorching carbon generated in the combustion process enter a lower combustion chamber (ash collecting chamber) to be continuously combusted under the action of gravity, and flue gas (containing gasified combustible gas and micro-particles) generated in a hearth in the combustion process enters the lower combustion chamber (ash collecting chamber) to be continuously and partially combusted under the action of negative pressure of a draught fan; under the action of negative pressure, combustible gas which is not combusted in a first combustion zone (a hearth and an ash collecting chamber) and incompletely combusted smoke (microparticles) enter a secondary combustion chamber under the action of negative pressure, and a small amount of air is provided for the secondary combustion chamber, so that combustion products such as combustion volatile matters and tar which are not completely combusted can be continuously combusted in the smoke with sufficient oxygen content, the combustion efficiency of biomass is effectively improved, and the purposes of energy conservation and emission reduction are achieved; combustible gas and harmful gas generated by the fuel are combusted fully through secondary high-temperature combustion, black smoke is not emitted, and the smoke emission meets the environmental protection requirement. Compared with the traditional hot blast stove, the heat conversion efficiency is improved by more than 25 percent, and the fuel is saved by more than 20 percent.
And the second method comprises the following steps: a back-burning type steam hot blast stove comprises a stove body, a grate and a stove shell, wherein the stove body is arranged at one end of the inner lower part of the stove shell, the grate is arranged at the inner lower part of the stove body, and the stove body is divided into a hearth and an ash collecting chamber; the furnace body is provided with a furnace door and a slag removal port, the upper part of the other end in the furnace shell is sequentially provided with a smoke separation chamber and a smoke collection chamber, and the lower part is provided with a lower smoke chamber; the smoke collecting chamber is provided with a smoke outlet; the space between the smoke separating chamber and the smoke collecting chamber and the lower smoke chamber is a heat exchange cavity; the smoke separating chamber and the smoke collecting chamber are respectively communicated with the lower smoke chamber through a plurality of heat exchange tubes in the heat exchange cavity; the hot blast stove also comprises a secondary combustion chamber, the lower part of the secondary combustion chamber is communicated with the ash collecting chamber through a fire hole, and the upper part of the secondary combustion chamber is communicated with the smoke distributing chamber through a smoke hole; the upper part of the hearth is provided with a primary oxygen inlet, and the lower part of the secondary combustion chamber is provided with a secondary oxygen inlet; one end of the heat exchange cavity is provided with an air inlet, the other end of the heat exchange cavity is communicated with the inner cavity of the furnace shell at the upper part of the furnace body, and the inner cavity of the furnace shell at the upper part of the furnace body is provided with a hot air outlet; the steam collecting box is provided with a steam outlet and is communicated with the water tank interlayer at the top through a steam guide pipe; the fire grate is a pipe fire grate which can be communicated with water, and the fire grate is communicated with the steam collecting box.
The air inlet is provided with a steam radiator, and the steam radiator is connected with a steam outlet through a steam pipe.
And the third is that: a back-burning type steam hot-blast stove comprises a stove body and a grate, wherein the grate is arranged at the inner lower part of the stove body and divides the inside of the stove body into a hearth and an ash collecting chamber; the furnace body is provided with a furnace door and a slag removal port, the inner upper part of the furnace body is provided with a clapboard, and the clapboard divides the inner top of the furnace body into a heat exchange chamber; the hot blast stove also comprises a secondary combustion chamber, the lower part of the secondary combustion chamber is communicated with the ash collecting chamber through a fire hole, and the upper part of the secondary combustion chamber is communicated with the smoke distributing chamber through a smoke hole; the upper part of the hearth is provided with a primary oxygen inlet, and the lower part of the secondary combustion chamber is provided with a secondary oxygen inlet; the lower part of the smoke separating chamber is provided with a heat exchange cavity, the lower part of the heat exchange cavity is provided with a lower smoke chamber, one side of the upper part of the heat exchange cavity is also provided with a smoke collecting chamber, and the smoke separating chamber and the smoke collecting chamber are respectively communicated with the lower smoke chamber through a plurality of heat exchange tubes in the heat exchange cavity; the smoke collecting chamber is provided with a smoke outlet; one end of the heat exchange cavity close to the smoke outlet is provided with a hot air outlet, the other end of the heat exchange cavity is communicated with the heat exchange chamber through an air passage, and the heat exchange chamber is provided with an air inlet; the periphery of the furnace body is provided with a water tank interlayer, the rear side of the furnace body is provided with a steam collecting box, and the steam collecting box is provided with a steam outlet; the fire grate is a pipe fire grate which can be communicated with water, and the fire grate is communicated with the steam collecting box.
The steam collecting box is communicated with the air passage through the steam regulating valve and the air inlet manifold, and the steam outlet of the air inlet manifold faces the heat exchange cavity.
The steam outlet is connected with a steam radiator, the steam radiator is communicated with a condensed water collecting box through a pipeline, the condensed water collecting box is communicated with a flue gas cooler at the smoke outlet through a pipeline, and the flue gas cooler is communicated with the interlayer of the water tank through a pipeline; condensed water generated by the steam radiator enters the condensed water collecting tank, and condensed water cooling smoke is preheated and then conveyed to the interlayer of the water tank, so that cyclic utilization is realized.
The reverse-burning type steam hot blast stove takes biomass as fuel, takes air and water as media respectively, generates heat energy through heating and exchanging the media, outputs the heat energy in the form of hot air and steam, and provides a heat source for drying articles. The method comprises the following steps that fuel enters a furnace bore from a furnace door, the fuel is combusted in an upper combustion chamber (the furnace bore) above a fire grate component under the support of the fire grate component, the fuel which is not completely combusted and scorching carbon generated in the combustion process enter a lower combustion chamber (a slag chamber) under the action of gravity to be continuously combusted, and smoke (containing gasified combustible gas and micro-particles) generated in the furnace bore in the combustion process enters the lower combustion chamber (the slag chamber) to be continuously and partially combusted under the negative pressure action of a smoke exhaust fan; under the negative pressure, combustible gas unburnt in the first combustion zone and flue gas (microparticle) of not burning completely get into the postcombustion zone under the negative pressure effect, carry out secondary high temperature burning for the fuel fully burns, can not produce black flue gas, and then produces a large amount of clear hot flue gas. The fuel can be fully combusted through two times of high-temperature combustion, the combustion is complete, and the emission of pollutants is reduced.
The counter-burning type steam hot blast stove has the following advantages:
1. the warm and humid airflow generating furnace can realize multi-heat source output, can provide 3 heat sources of hot air, steam and warm and humid airflow, and can be used to meet the technological requirements of water-removing, cooking, drying, carbonization and the like of articles;
2. the steam generating source has 3 places: a fire grate, a furnace wall and a water cooler.
A. The water cooler is arranged at the flue opening, and is used for heating by using the waste heat of the flue gas to generate steam for supplying heat or humidifying, so that the heat efficiency is improved;
B. cooling water is injected into the fire grate and the furnace wall, so that steam is generated, and meanwhile, related parts of the fire grate and the combustion chamber are cooled, and the service life of equipment is prolonged;
C. 2 steam outlets are designed in the steam-water separation device, and the 1 st steam outlet is mixed with hot air through a steam regulating valve to form warm and humid air flow; the 2 nd channel can be butted with a steam radiator, the radiator can be arranged in the drying carbonization kiln to improve the temperature in the drying carbonization kiln, and also can be arranged at the air inlet end of a heat exchanger to improve the temperature of the air inlet and improve the thermal efficiency.
3. A twice heat recycling structure is adopted, so that fuel is fully combusted, waste heat is fully utilized, heat conversion efficiency is improved, energy is saved, and emission is reduced;
(1) the tail end of a flue gas pipeline of the smoke exhaust system is provided with an encircling water tank, the bottom of the water tank is communicated with a water pump, a furnace wall and a water cooler through pipelines, the furnace wall and the water cooler are steam generation devices, steam generated by the furnace wall and the water cooler is collected in a steam-water separator through the pipelines, the top of the steam-water separator is connected with a steam radiator through a pipeline and an adjusting valve, the tail end of the radiator is provided with a drain valve and a condensate water recovery pipe, the steam is condensed into water after heat exchange through the radiator and is connected into the water tank through the condensate water recovery pipe, primary circulation is formed, water resources are saved, the waste heat of the flue gas is effectively utilized to. Meanwhile, the water cooler and the furnace wall are supplemented with 80-100 ℃ hot water, the temperature difference between the hot water and the water in the furnace wall and the water cooling is not large, and the temperature of the furnace body is not reduced suddenly when water is added, so that the constant temperature of the hearth and the stable generation of steam are ensured and maintained;
(2) the heat exchange chamber and the drying carbonization kiln form primary circulation through an air inlet pipeline, a circulating fan and an exhaust pipeline, hot air or warm and humid air flow enters the drying carbonization kiln to indirectly or directly exchange heat with materials, and the unused hot air and moisture, volatile gas and the like generated after heat exchange are pumped into the heat exchange chamber to be subjected to volatile matter thermal oxidation treatment, dehumidification, preheating, secondary heating and other treatments, so that the waste heat after heat exchange is fully utilized, and the heat conversion utilization rate is improved.
4. The water supplementing mode by adopting hot water is as follows: (1) an encircling water tank is designed at the tail end of a flue gas pipeline of the smoke exhaust system, and the heat exchange efficiency is improved by preheating by utilizing the temperature of the flue gas; (2) when the steam generating source needs to be supplemented with water, the water pump is used for adding water from the water tank, and hot water is added, so that the temperature of the furnace body is reduced due to direct cold water addition, the influence of steam pressure reduction is reduced, the stability of the temperature and the steam pressure of the furnace body is ensured, a stable steam source and pressure are provided, and the continuous generation of warm and wet air flow is ensured.
5. Indirect heat exchange device design has 2 heat exchange rooms, when the circulation air from stoving carbonization kiln exhanst gas is through 1, dehumidify and preheat the processing, form the lower hot-blast air current of relative humidity, at this moment, reentrant the mixing tube between 1 st and 2 nd heat exchange rooms, carry out the proportion mixture with steam according to stoving carbonization stage technological requirement, form warm and humid air current, carry out the secondary heating processing through 2 nd heat exchange room again, under circulating fan's effect, in being sent into the stoving kiln again, contact once more with the stoving article, carry out the heat exchange, so circulate, thereby reach the stoving purpose.
Drawings
FIG. 1 is a schematic block diagram of the structure of a reverse-burning steam hot blast stove in examples 1 to 3;
FIG. 2 is a schematic view of the structure of the grate of FIG. 1;
FIG. 3 is a schematic block diagram showing the structure of the reverse-burning steam hot blast stove of example 4;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a left side view of FIG. 3;
FIG. 6 is a schematic view of the internal structure of the counter-fired steam hot blast stove of FIG. 3;
FIG. 7 is a top view of FIG. 6;
FIG. 8 is a left side view of FIG. 6;
FIG. 9 is a schematic block diagram showing the structure of the reverse-burning steam hot blast stove of example 5;
FIG. 10 is a top view of FIG. 9;
FIG. 11 is a cross-sectional view of FIG. 9;
the part names of the sequence numbers in the figure are:
1. the boiler comprises a boiler body, 2, a partition board, 3, a primary oxygen inlet, 4, a boiler door, 5, a hearth, 6, a fire grate, 7, a slag removal port, 8, an ash collecting chamber, 9, a fire passing port, 10, a secondary oxygen inlet, 11, a secondary combustion chamber, 12, an induced draft fan, 13, a smoke passing port, 14, a smoke separating chamber, 15, a heat exchange pipe, 16, a heat exchange cavity, 17, a hot air outlet, 18, a smoke discharging port, 19, a smoke collecting chamber, 20, an air inlet, 21, a blower, 22, a transverse water separating pipe, 23, a longitudinal heat exchange pipe, 24, a transverse steam collecting pipe, 25, a steam guide pipe, 26, a steam collecting box, 27, a boiler shell, 28, a lower smoke chamber, 29, a water tank interlayer, 30, a steam outlet, 31, a steam radiator, 32, a heat exchange chamber, 33, an air passage, 34, a steam regulating valve, 35, an air inlet manifold.
Detailed Description
In order to make the technical scheme and advantages of the present application clearer, the following description clearly and completely describes the technical scheme of the counter-burning type steam hot blast stove with reference to the embodiment and the accompanying drawings.
Example 1
A back-burning type steam hot blast stove comprises a stove body 1 and a fire grate 6, wherein the fire grate 6 is arranged at the inner lower part of the stove body 1 and divides the inside of the stove body 1 into a hearth 5 and an ash collecting chamber 8; the furnace body 1 is provided with a furnace door 4 and a slag removal port 7, the inner upper part of the furnace body 1 is provided with a partition plate 2, and the partition plate 2 partitions the inner top of the furnace body 1 into a smoke chamber 14; the hot blast stove also comprises a secondary combustion chamber 11, the secondary combustion chamber 11 is arranged outside the hearth 5, and the chamber wall of the secondary combustion chamber 11 is connected with the stove body 1 into a whole; the lower part of the secondary combustion chamber 11 is communicated with the ash collecting chamber 8 through a fire hole 9, and the upper part of the secondary combustion chamber 11 is communicated with a smoke distributing chamber 14 through a smoke hole 13; the upper part of the hearth 5 is provided with a primary oxygen inlet 3, and the lower part of the secondary combustion chamber 11 is provided with a secondary oxygen inlet 10; the top of the furnace body 1 is provided with a heat exchange cavity 16, and the top of the heat exchange cavity 16 is provided with a smoke collection chamber 19; the smoke collection chamber 19 is communicated with the smoke distribution chamber 14 through a plurality of heat exchange tubes 15 arranged in the heat exchange cavity 16; the smoke collection chamber 19 is provided with a smoke outlet 18 connected with the induced draft fan 12; the lower part of one side of the heat exchange cavity 16 is provided with an air inlet 20 connected with a blower 21, and the upper part of the other side of the heat exchange cavity 16 is provided with a hot air outlet 17; the grate 6 is a pipe grate which can be communicated with water, and the grate 6 is communicated with a steam collecting box 26.
Example 2
A back-burning type steam hot blast stove comprises a stove body 1 and a fire grate 6, wherein the fire grate 6 is arranged at the inner lower part of the stove body 1 and divides the inside of the stove body 1 into a hearth 5 and an ash collecting chamber 8; the furnace body 1 is provided with a furnace door 4 and a slag removal port 7, the inner upper part of the furnace body 1 is provided with a partition plate 2, and the partition plate 2 partitions the inner top of the furnace body 1 into a smoke chamber 14; the hot blast stove also comprises a secondary combustion chamber 11, the secondary combustion chamber 11 is arranged outside the hearth 5, and the chamber wall of the secondary combustion chamber 11 is connected with the stove body 1 into a whole; the lower part of the secondary combustion chamber 11 is communicated with the ash collecting chamber 8 through a fire hole 9, and the upper part of the secondary combustion chamber 11 is communicated with a smoke distributing chamber 14 through a smoke hole 13; the upper part of the hearth 5 is provided with a primary oxygen inlet 3, and the lower part of the secondary combustion chamber 11 is provided with a secondary oxygen inlet 10; the top of the furnace body 1 is provided with a heat exchange cavity 16, and the top of the heat exchange cavity 16 is provided with a smoke collection chamber 19; the smoke collection chamber 19 is communicated with the smoke distribution chamber 14 through a plurality of heat exchange tubes 15 arranged in the heat exchange cavity 16; the smoke collection chamber 19 is provided with a smoke outlet 18 connected with the induced draft fan 12; the lower part of one side of the heat exchange cavity 16 is provided with an air inlet 20 connected with a blower 21, and the upper part of the other side of the heat exchange cavity 16 is provided with a hot air outlet 17; the fire grate 6 consists of a plurality of longitudinal heat exchange tubes 23, and two ends of each longitudinal heat exchange tube 23 penetrate through the furnace body 1 and are fixed in the furnace body 1 at an inclination angle of 5-10 degrees; the lower end of the longitudinal heat exchange tube 23 is communicated with a transverse water distribution tube 22, and the high end is communicated with a transverse steam collection tube 24; the lateral steam collecting pipe 24 communicates with the lower portion of the steam collecting tank 26 through a steam guide pipe 25.
The fire grate 6 can be provided with a single-layer fire grate and a double-layer fire grate according to the requirement of steam production; two sets of double-layer grates, namely two sets of longitudinal heat exchange tubes 23 are arranged, wherein the upper and lower sets of longitudinal heat exchange tubes 23 are respectively arranged, the lower ends of the two sets of longitudinal heat exchange tubes 23 are respectively communicated with one transverse water distribution tube 22, the two transverse water distribution tubes 22 are also mutually communicated, the high ends of the two sets of longitudinal heat exchange tubes are respectively communicated with one transverse steam collection tube 24, and the two transverse steam collection tubes 24 are also mutually communicated.
Example 3
A back-burning type steam hot blast stove comprises a stove body 1 and a fire grate 6, wherein the fire grate 6 is arranged at the inner lower part of the stove body 1 and divides the inside of the stove body 1 into a hearth 5 and an ash collecting chamber 8; the furnace body 1 is provided with a furnace door 4 and a slag removal port 7, the inner upper part of the furnace body 1 is provided with a partition plate 2, and the partition plate 2 partitions the inner top of the furnace body 1 into a smoke chamber 14; the hot blast stove also comprises a secondary combustion chamber 11, the secondary combustion chamber 11 is arranged outside the hearth 5, and the chamber wall of the secondary combustion chamber 11 is connected with the stove body 1 into a whole; the lower part of the secondary combustion chamber 11 is communicated with the ash collecting chamber 8 through a fire hole 9, and the upper part of the secondary combustion chamber 11 is communicated with a smoke distributing chamber 14 through a smoke hole 13; the upper part of the hearth 5 is provided with a primary oxygen inlet 3, and the lower part of the secondary combustion chamber 11 is provided with a secondary oxygen inlet 10; the top of the furnace body 1 is provided with a heat exchange cavity 16, and the top of the heat exchange cavity 16 is provided with a smoke collection chamber 19; the smoke collection chamber 19 is communicated with the smoke distribution chamber 14 through a plurality of heat exchange tubes 15 arranged in the heat exchange cavity 16; the smoke collection chamber 19 is provided with a smoke outlet 18 connected with the induced draft fan 12; the lower part of one side of the heat exchange cavity 16 is provided with an air inlet 20 connected with a blower 21, and the upper part of the other side of the heat exchange cavity 16 is provided with a hot air outlet 17; the fire grate 6 consists of a plurality of longitudinal heat exchange tubes 23, and two ends of each longitudinal heat exchange tube 23 penetrate through the furnace body 1 and are fixed in the furnace body 1 at an inclination angle of 5-10 degrees; the lower end of the longitudinal heat exchange tube 23 is communicated with a transverse water distribution tube 22, and the high end is communicated with a transverse steam collection tube 24; the lateral steam collecting pipe 24 communicates with the lower portion of the steam collecting tank 26 through a steam guide pipe 25.
The fire grate 6 can be provided with a single-layer fire grate and a double-layer fire grate according to the requirement of steam production; two sets of double-layer grates, namely two sets of longitudinal heat exchange tubes 23 are arranged, wherein the upper and lower sets of longitudinal heat exchange tubes 23 are respectively arranged, the lower ends of the two sets of longitudinal heat exchange tubes 23 are respectively communicated with one transverse water distribution tube 22, the two transverse water distribution tubes 22 are also mutually communicated, the high ends of the two sets of longitudinal heat exchange tubes are respectively communicated with one transverse steam collection tube 24, and the two transverse steam collection tubes 24 are also mutually communicated.
The heat exchange cavity 16 is cylindrical or elliptic cylindrical, the air inlet 20 is arranged on the quadrant point at the lower part of the heat exchange cavity 16 and is tangent to the normal direction of the cylindrical surface of the heat exchange cavity 16, under the negative pressure action of the air blower 21, air enters the heat exchange cavity 16 from the air inlet 20, forms spiral whirlwind in the heat exchange cavity 16 and moves in a spiral curve manner, the heat exchange time and the stroke are improved by 2-3 times, and the heat conversion efficiency is greatly improved.
The furnace body is provided with a cavity which can contain water and is communicated with the fire grate. When the fuel is combusted in a reverse combustion mode, a large amount of heat is generated to be in contact with the fire grate and the furnace wall, water in the cavity is heated and evaporated to generate steam, and the steam is generated continuously and stably along with the continuous generation of combustion. Meanwhile, the water in the cavity also has a cooling effect on the fire grate and the furnace wall, so that the service life is prolonged.
Example 4
A back-burning type steam hot blast stove comprises a stove body 1, a fire grate 6 and a stove shell 27, wherein the stove body 1 is arranged at one end of the inner lower part of the stove shell 27, the fire grate 6 is arranged at the inner lower part of the stove body 1, and the stove body 1 is divided into a hearth 5 and an ash collecting chamber 8; the furnace body 1 is provided with a furnace door 4 and a slag removal port 7, the upper part of the other end in the furnace shell 27 is sequentially provided with a smoke distribution chamber 14 and a smoke collection chamber 19, and the lower part is provided with a lower smoke chamber 28; the smoke collection chamber 19 is provided with a smoke outlet 18; the space between the smoke separating chamber 14 and the smoke collecting chamber 19 and the lower smoke chamber 28 is a heat exchange cavity 16; the smoke distributing chamber 14 and the smoke collecting chamber 19 are respectively communicated with the lower smoke chamber 28 through a plurality of heat exchange tubes 15 in the heat exchange cavity 16; the hot blast stove also comprises a secondary combustion chamber 11, the lower part of the secondary combustion chamber 11 is communicated with the ash collecting chamber 8 through a fire hole 9, and the upper part of the secondary combustion chamber 11 is communicated with a smoke distributing chamber 14 through a smoke hole 13; the upper part of the hearth 5 is provided with a primary oxygen inlet 3, and the lower part of the secondary combustion chamber 11 is provided with a secondary oxygen inlet 10; one end of the heat exchange cavity 16 is provided with an air inlet 20, the other end is communicated with the inner cavity of the furnace shell 27 at the upper part of the furnace body 1, and the inner cavity of the furnace shell 27 at the upper part of the furnace body 1 is provided with a hot air outlet 17; the steam boiler is characterized in that water tank interlayers 29 are arranged on two sides and the top of the boiler body 1, a steam collecting box 26 is arranged on the rear side of the boiler body, a steam outlet 30 is arranged on the steam collecting box 26, and the steam collecting box 26 is communicated with the water tank interlayer 29 on the top through a steam guide pipe 25; the grate 6 is a pipe grate which can be communicated with water, and the grate 6 is communicated with a steam collecting box 26.
The air inlet 20 is provided with a steam radiator 31, and the steam radiator 31 is connected with the steam outlet 30 through a steam pipe.
Example 5
A back-burning type steam hot blast stove comprises a stove body 1 and a fire grate 6, wherein the fire grate 6 is arranged at the inner lower part of the stove body 1 and divides the inside of the stove body 1 into a hearth 5 and an ash collecting chamber 8; the furnace body 1 is provided with a furnace door 4 and a slag removal port 7, the inner upper part of the furnace body 1 is provided with a clapboard 2, and the clapboard 2 divides the inner top of the furnace body 1 into a heat exchange chamber 32; the hot blast stove also comprises a secondary combustion chamber 11, the lower part of the secondary combustion chamber 11 is communicated with the ash collecting chamber 8 through a fire hole 9, and the upper part of the secondary combustion chamber 11 is communicated with a smoke distributing chamber 14 through a smoke hole 13; the upper part of the hearth 5 is provided with a primary oxygen inlet 3, and the lower part of the secondary combustion chamber 11 is provided with a secondary oxygen inlet 10; the lower part of the smoke separating chamber 14 is provided with a heat exchange chamber 16, the lower part of the heat exchange chamber 16 is provided with a lower smoke chamber 28, one side of the upper part of the heat exchange chamber 16 is also provided with a smoke collecting chamber 19, and the smoke separating chamber 14 and the smoke collecting chamber 19 are respectively communicated with the lower smoke chamber 28 through a plurality of heat exchange tubes 15 in the heat exchange chamber 16; the smoke collection chamber 19 is provided with a smoke outlet 18; one end of the heat exchange cavity 16 close to the smoke exhaust port 18 is provided with a hot air outlet 17, the other end of the heat exchange cavity is communicated with a heat exchange chamber 32 through an air passage 33, and the heat exchange chamber 32 is provided with an air inlet 20; a water tank interlayer 29 is arranged on the periphery of the furnace body 1, a steam collecting box 26 is arranged on the rear side of the furnace body, and a steam outlet 30 is arranged on the steam collecting box 26; the grate 6 is a pipe grate which can be communicated with water, and the grate 6 is communicated with a steam collecting box 26.
The steam collecting tank 26 is communicated with the air passage 33 through a steam regulating valve 34 and an air inlet manifold 35, and a steam outlet of the air inlet manifold 35 faces the heat exchange cavity 16.
Example 6
A back-burning type steam hot blast stove comprises a stove body 1 and a fire grate 6, wherein the fire grate 6 is arranged at the inner lower part of the stove body 1 and divides the inside of the stove body 1 into a hearth 5 and an ash collecting chamber 8; the furnace body 1 is provided with a furnace door 4 and a slag removal port 7, the inner upper part of the furnace body 1 is provided with a clapboard 2, and the clapboard 2 divides the inner top of the furnace body 1 into a heat exchange chamber 32; the hot blast stove also comprises a secondary combustion chamber 11, the lower part of the secondary combustion chamber 11 is communicated with the ash collecting chamber 8 through a fire hole 9, and the upper part of the secondary combustion chamber 11 is communicated with a smoke distributing chamber 14 through a smoke hole 13; the upper part of the hearth 5 is provided with a primary oxygen inlet 3, and the lower part of the secondary combustion chamber 11 is provided with a secondary oxygen inlet 10; the lower part of the smoke separating chamber 14 is provided with a heat exchange chamber 16, the lower part of the heat exchange chamber 16 is provided with a lower smoke chamber 28, one side of the upper part of the heat exchange chamber 16 is also provided with a smoke collecting chamber 19, and the smoke separating chamber 14 and the smoke collecting chamber 19 are respectively communicated with the lower smoke chamber 28 through a plurality of heat exchange tubes 15 in the heat exchange chamber 16; the smoke collection chamber 19 is provided with a smoke outlet 18; one end of the heat exchange cavity 16 close to the smoke exhaust port 18 is provided with a hot air outlet 17, the other end of the heat exchange cavity is communicated with a heat exchange chamber 32 through an air passage 33, and the heat exchange chamber 32 is provided with an air inlet 20; a water tank interlayer 29 is arranged on the periphery of the furnace body 1, a steam collecting box 26 is arranged on the rear side of the furnace body, and a steam outlet 30 is arranged on the steam collecting box 26; the grate 6 is a pipe grate which can be communicated with water, and the grate 6 is communicated with a steam collecting box 26.
The steam collecting tank 26 is communicated with the air passage 33 through a steam regulating valve 34 and an air inlet manifold 35, and a steam outlet of the air inlet manifold 35 faces the heat exchange cavity 16.
The steam outlet 30 is connected with a steam radiator 31, the steam radiator 31 is communicated with a condensed water collecting box 36 through a pipeline, the condensed water collecting box 36 is communicated with a flue gas cooler of the smoke outlet 18 through a pipeline, and the flue gas cooler is communicated with the water tank interlayer 29 through a pipeline; the condensed water generated by the steam radiator 31 enters the condensed water collection box 36, and the condensed water cooling flue gas is preheated and then conveyed to the interlayer of the water tank, so that the cyclic utilization is realized.
The above description is not intended to limit the present application, and the present application is not limited to the above examples, and those skilled in the art should understand that they can make various changes, modifications, additions or substitutions within the spirit and scope of the present application.
Claims (9)
1. A back-burning type steam hot blast stove comprises a stove body (1) and a fire grate (6), wherein the fire grate (6) is arranged at the inner lower part of the stove body (1) and divides the inside of the stove body (1) into a hearth (5) and an ash collecting chamber (8); be provided with furnace gate (4) and slag notch (7) on furnace body (1), its characterized in that: a partition plate (2) is arranged at the inner upper part of the furnace body (1), and the partition plate (2) partitions the inner top of the furnace body (1) into a smoke-forming chamber (14); the hot blast stove also comprises a secondary combustion chamber (11), the lower part of the secondary combustion chamber (11) is communicated with the ash collecting chamber (8) through a fire hole (9), and the upper part of the secondary combustion chamber (11) is communicated with the smoke separating chamber (14) through a smoke hole (13); the upper part of the hearth (5) is provided with a primary oxygen inlet (3), and the lower part of the secondary combustion chamber (11) is provided with a secondary oxygen inlet (10); a heat exchange cavity (16) is arranged at the top of the furnace body (1), and a smoke collection chamber (19) is arranged at the top of the heat exchange cavity (16); the smoke collection chamber (19) is communicated with the smoke distribution chamber (14) through a plurality of heat exchange tubes (15) arranged in the heat exchange cavity (16); the smoke collection chamber (19) is provided with a smoke outlet (18) connected with the induced draft fan (12); the lower part of one side of the heat exchange cavity (16) is provided with an air inlet (20) connected with a blower (21), and the upper part of the other side of the heat exchange cavity (16) is provided with a hot air outlet (17); the fire grate (6) is a pipe fire grate which can be communicated with water, and the fire grate (6) is communicated with the steam collecting box (26).
2. The counter-fired steam hot blast stove according to claim 1, characterized in that: the fire grate (6) is composed of a plurality of longitudinal heat exchange tubes (23), and two ends of each longitudinal heat exchange tube (23) penetrate through the furnace body (1) and are fixed in the furnace body (1) in an inclined angle of 5-10 degrees; the lower end of the longitudinal heat exchange pipe (23) is communicated with a transverse water distribution pipe (22), and the upper end is communicated with a transverse steam collection pipe (24); the transverse steam collecting pipe (24) is communicated with the lower part of the steam collecting box (26) through a steam guide pipe (25).
3. The counter-fired steam hot blast stove according to claim 1, characterized in that: the heat exchange cavity (16) is cylindrical or elliptic cylindrical, and the air inlet (20) is arranged on an imaginary point at the lower part of the heat exchange cavity (16) and is tangent to the normal direction of the cylindrical surface of the heat exchange cavity (16).
4. The counter-fired steam hot blast stove according to claim 1, characterized in that: the furnace body (1) is provided with a cavity which can contain water and is communicated with the fire grate.
5. A back-burning type steam hot blast stove comprises a stove body (1), a fire grate (6) and a stove shell (27), wherein the stove body (1) is arranged at one end of the inner lower part of the stove shell (27), the fire grate (6) is arranged at the inner lower part of the stove body (1), and the inside of the stove body (1) is divided into a hearth (5) and an ash collecting chamber (8); be provided with furnace gate (4) and slag notch (7) on furnace body (1), its characterized in that: the upper part of the other end in the furnace shell (27) is sequentially provided with a smoke distribution chamber (14) and a smoke collection chamber (19), and the lower part is provided with a lower smoke chamber (28); the smoke collection chamber (19) is provided with a smoke outlet (18); the space between the smoke separating chamber (14) and the smoke collecting chamber (19) and the lower smoke chamber (28) is a heat exchange cavity (16); the smoke distribution chamber (14) and the smoke collection chamber (19) are respectively communicated with the lower smoke chamber (28) through a plurality of heat exchange tubes (15) in the heat exchange cavity (16); the hot blast stove also comprises a secondary combustion chamber (11), the lower part of the secondary combustion chamber (11) is communicated with the ash collecting chamber (8) through a fire hole (9), and the upper part of the secondary combustion chamber (11) is communicated with the smoke separating chamber (14) through a smoke hole (13); the upper part of the hearth (5) is provided with a primary oxygen inlet (3), and the lower part of the secondary combustion chamber (11) is provided with a secondary oxygen inlet (10); one end of the heat exchange cavity (16) is provided with an air inlet (20), the other end of the heat exchange cavity is communicated with the inner cavity of the furnace shell (27) at the upper part of the furnace body (1), and the inner cavity of the furnace shell (27) at the upper part of the furnace body (1) is provided with a hot air outlet (17); water tank interlayers (29) are arranged on two sides and the top of the furnace body (1), a steam collecting box (26) is arranged on the rear side, a steam outlet (30) is arranged on the steam collecting box (26), and the steam collecting box (26) is communicated with the water tank interlayer (29) on the top through a steam guide pipe (25); the fire grate (6) is a pipe fire grate which can be communicated with water, and the fire grate (6) is communicated with the steam collecting box (26).
6. The counter-fired steam hot blast stove according to claim 5, characterized in that: the air inlet (20) is provided with a steam radiator (31), and the steam radiator (31) is connected with the steam outlet (30) through a steam pipe.
7. A back-burning type steam hot blast stove comprises a stove body (1) and a fire grate (6), wherein the fire grate (6) is arranged at the inner lower part of the stove body (1) and divides the inside of the stove body (1) into a hearth (5) and an ash collecting chamber (8); be provided with furnace gate (4) and slag notch (7) on furnace body (1), its characterized in that: a partition plate (2) is arranged at the inner upper part of the furnace body (1), and the partition plate (2) partitions the inner top of the furnace body (1) into a heat exchange chamber (32); the hot blast stove also comprises a secondary combustion chamber (11), the lower part of the secondary combustion chamber (11) is communicated with the ash collecting chamber (8) through a fire hole (9), and the upper part of the secondary combustion chamber (11) is communicated with the smoke separating chamber (14) through a smoke hole (13); the upper part of the hearth (5) is provided with a primary oxygen inlet (3), and the lower part of the secondary combustion chamber (11) is provided with a secondary oxygen inlet (10); a heat exchange cavity (16) is arranged at the lower part of the smoke distribution chamber (14), a lower smoke chamber (28) is arranged at the lower part of the heat exchange cavity (16), a smoke collection chamber (19) is also arranged at one side of the upper part of the heat exchange cavity (16), and the smoke distribution chamber (14) and the smoke collection chamber (19) are respectively communicated with the lower smoke chamber (28) through a plurality of heat exchange tubes (15) in the heat exchange cavity (16); the smoke collection chamber (19) is provided with a smoke outlet (18); one end of the heat exchange cavity (16) close to the smoke outlet (18) is provided with a hot air outlet (17), the other end of the heat exchange cavity is communicated with a heat exchange chamber (32) through an air passage (33), and the heat exchange chamber (32) is provided with an air inlet (20); a water tank interlayer (29) is arranged on the periphery of the furnace body (1), a steam collecting box (26) is arranged on the rear side of the furnace body, and a steam outlet (30) is arranged on the steam collecting box (26); the fire grate (6) is a pipe fire grate which can be communicated with water, and the fire grate (6) is communicated with the steam collecting box (26).
8. The counter-fired steam hot blast stove according to claim 7, characterized in that: the steam collecting box (26) is communicated with the air channel (33) through a steam regulating valve (34) and an air inlet manifold (35), and a steam outlet of the air inlet manifold (35) faces the heat exchange cavity (16).
9. The counter-fired steam hot blast stove according to claim 7, characterized in that: the steam outlet (30) is connected with a steam radiator (31), the steam radiator (31) is communicated with a condensed water collecting box (36) through a pipeline, the condensed water collecting box (36) is communicated with a flue gas cooler of the smoke outlet (18) through a pipeline, and the flue gas cooler is communicated with the water tank interlayer (29) through a pipeline; condensed water generated by the steam radiator (31) enters the condensed water collecting box (36), and the condensed water cooling smoke is preheated and then conveyed into the interlayer of the water tank, so that cyclic utilization is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020286068.1U CN211695394U (en) | 2020-03-10 | 2020-03-10 | Reverse burning type steam hot blast stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020286068.1U CN211695394U (en) | 2020-03-10 | 2020-03-10 | Reverse burning type steam hot blast stove |
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| Publication Number | Publication Date |
|---|---|
| CN211695394U true CN211695394U (en) | 2020-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020286068.1U Active CN211695394U (en) | 2020-03-10 | 2020-03-10 | Reverse burning type steam hot blast stove |
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| Country | Link |
|---|---|
| CN (1) | CN211695394U (en) |
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2020
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