CN202002308U - Three-return-stroke environment-friendly energy-saving hot blast stove - Google Patents

Abstract

The utility model discloses a three-pass environmentally friendly and energy-saving hot blast furnace, which comprises: a first wall body, a second wall body, a third wall body, a fourth wall body, a fifth wall body, a sixth wall body and a seventh wall body, the first seven walls are sequentially inserted and fixedly connected to each other; a first cylinder body is arranged in the middle of the first wall body, a plurality of spiral heat transfer air ducts are arranged on the outer periphery of the first cylinder body, the first cylinder body is sealed and fixedly connected with the inner wall of the second wall body through the heat transfer air duct; the second cylinder body is fixedly connected with the fourth cylinder body The 4th cylinder is fixedly connected to the top of the 3rd wall body, and the 3rd cylinder is fixedly connected to the 5th cylinder; the top of the 2nd wall body is provided with a 1st opening, and the 4th cylinder is arranged in the 1st opening; the 2nd wall body is arranged between the 1st wall body and the 3rd wall body, and the 2nd wall body is fixedly connected to the 1st wall body through multiple heat transfer ducts. The product has high heat exchange temperature, high heat utilization rate, small size, stable hot air temperature, no switching mechanism, long service life, low maintenance cost and low purchase cost.

Description

Three-pass environmental protection and energy-saving hot air stove

technical field

The utility model relates to a hot blast stove, in particular to a three-pass environment-friendly and energy-saving hot blast stove.

Background technique

At present, as a thermal power machine, hot blast stoves began to be widely used in my country in the late 1970s. It has become a replacement product for electric heat sources and traditional steam power heat sources in many industries.

Through long-term production practice, people have realized that only by using hot air as the medium and carrier can the heat utilization rate and thermal work effect be greatly improved. Traditional electric heat sources and steam thermal power are often equipped with multiple circulating fans during the transportation process, so that they will eventually form hot air indirectly for drying or heating operations. This process obviously has many shortcomings such as a large amount of waste of energy, excessive auxiliary equipment, and complicated technological process. The bigger problem is that this kind of heat source is helpless for the kind of requirements that require higher temperature drying or baking operations. After years of painstaking research in response to these practical problems, we finally developed the JRL series spiral fin tube heat exchange indirect hot blast stove and the ZRL series high-purification direct hot blast stove, which are popular with users at home and abroad.

1. Direct-type high-purification hot air stove: it uses fuel to burn directly, and forms hot air after high-purification treatment, and directly contacts with materials to heat, dry or bake. The fuel consumption of this method is about half that of steam or other indirect heaters. Therefore, direct high-purification hot air can be used without affecting the quality of the dried product. Fuel can be divided into: ① solid fuel, such as coal, coke. ②Liquid fuel, such as diesel oil, heavy oil ③Gaseous fuel, such as gas, natural gas, liquid gas.

The high-temperature combustion gas obtained after the combustion reaction of the fuel is further in contact with the outside air, and after mixing to a certain temperature, it directly enters the drying room or baking room, contacts with the material to be dried, heats and evaporates water, and thus obtains a dry product. In order to utilize the combustion reaction heat of these fuels, a set of fuel combustion devices must be added. Such as: coal burners, oil burners, gas burners, etc.

2. Indirect hot air stove: mainly suitable for drying materials that are not allowed to be contaminated, or for drying heat-sensitive materials with low temperature. Such as: milk powder, pharmaceuticals, synthetic resins, fine chemicals, etc. This kind of heating device is to use steam, heat transfer oil, flue gas, etc. as carriers to heat the air through various forms of heat exchangers. The most essential problem of indirect hot blast stove is heat exchange. The larger the heat exchange area, the higher the heat conversion rate, the better the energy saving effect of the hot blast stove, and the longer the life of the furnace body and heat exchanger. Conversely, the size of the heat exchange area can also be identified from the flue gas temperature. The lower the smoke temperature, the higher the heat conversion rate and the larger the heat exchange area.

The working principle can be divided into two types: heat storage type and heat exchange type: heat storage type: according to the regenerator inside the hot blast stove, the ball type hot blast stove (referred to as the ball stove) and the hot blast stove using checker bricks can be divided according to the combustion method. There are several kinds of top combustion type, internal combustion type and external combustion type. How to increase the wind temperature is a long-term research direction for people in the industry. The commonly used method is to burn high calorific value gas, or increase the heat exchange area of the checker bricks of the hot blast stove, or change the material and density of the checker bricks, or change the shape of the heat storage body (such as heat storage balls), and use various methods to transfer the gas and combustion air preheating. Disadvantages: large volume, large battlefield area, unstable hot air temperature, many switching mechanisms, prone to problems, short life of heat storage body, high maintenance cost, and extremely high purchase cost.

Heat exchange type: The main part is to use high temperature resistant heat exchanger as the core component, which cannot be used. Metal heat exchangers can only use high-temperature-resistant ceramic heat exchangers. The gas gas is fully burned in the combustion chamber, and the hot air after combustion passes through the heat exchanger to exchange heat for fresh cold air, which can make the fresh air temperature reach Above 1000 degrees. Disadvantages: The heat exchange temperature is not as high as that of the heat storage type, and it appeared later and has not been widely used.

Utility model content

The purpose of the utility model is to provide a three-pass environment-friendly and energy-saving hot air stove with simple structure, convenient and practical, and low cost, which is not only durable, safe and reliable, but also easy to install and widely used.

For solving the problems of the technologies described above, the technical solution of the utility model is:

This three-pass environmental protection and energy-saving hot blast stove includes: feed inlet, and the hot blast stove includes: the first layer of wall body, the second layer of wall body, the third layer of wall body, the fourth layer of wall body, the fifth layer of wall body, the The 6th layer of walls and the 7th layer of walls, the first 7 are sequentially inserted into each other and fixedly connected; the first layer of walls is in the shape of a cup; the middle part of the first layer of walls is provided with a first cylinder, and the outer circumference of the first cylinder There are multiple spiral heat transfer air ducts, and the first cylinder body is sealed and fixedly connected with the inner wall of the second wall through the heat transfer air ducts; the upper and lower parts of the first cylinder body are respectively connected to the second cylinder body and the second cylinder body. 3 cylinders are fixedly connected; the 2nd cylinder is fixedly connected with the 4th cylinder, the 4th cylinder is fixedly connected with the top of the 3rd wall, the 3rd cylinder is fixedly connected with the 5th cylinder; the 2nd wall There is a first opening on the top of the top, and the fourth cylinder is set in the first opening; the second wall is set between the first wall and the third wall, and the second wall is passed through multiple channels. The hot air channel is fixedly connected with the first layer of wall, and the second layer of wall is fixedly connected with the inner wall of the third layer of wall through multiple heat transfer air channels; the lower end of the third layer of wall is connected with the lower end of the fifth layer of wall Fixed connection, the wall of the fourth layer and the wall of the third layer are fixedly connected to form the first cooling flue, and the first cooling flue is fixedly connected to the multi-channel vertical flue composed of multiple cooling fins through the first outlet. The vertical flue seal is arranged between the 4th wall and the 5th wall; the 4th wall seals and fixes the upper part of the 3rd wall, and the upper end of the 5th wall is provided with a second opening. The outer periphery of the fifth layer of wall body is provided with a plurality of flue pipes, and the lower end of the flue pipe is fixedly connected with the furnace base; the fifth layer of wall body is fixedly connected with the sixth layer of wall body through a plurality of flue pipes; the sixth layer of wall body A cold air channel is formed between the body and the furnace base. There are multiple vertical air ducts on the outer periphery of the sixth-layer wall body. The base is fixedly connected; the air outlet is fixedly connected with the wall body of the second layer and the wall body of the seventh layer, and the air outlet is symmetrically arranged on both sides of the hot blast stove; the inlet is fixedly connected with the wall body of the first layer and the wall body of the seventh layer; The lower ends of the first-layer wall body, the second-layer wall body, the fifth-layer wall body, and the sixth-layer wall body are fixedly connected to the furnace base.

1st wall, 2nd wall, 3rd wall, 4th wall, 5th wall, 6th wall, 7th wall, 1st cylinder, 2nd cylinder The cross-sectional shape of the body, the third cylinder, the fourth cylinder, and the fifth cylinder is circular or square; the first layer of walls, the second layer of walls, the third layer of walls, the fourth layer of walls, The upper part of the 5th wall, the 6th wall, the 7th wall, the 1st cylinder, the 2nd cylinder, the 3rd cylinder, the 4th cylinder, and the 5th cylinder are in the shape of a conical cone. 3 The diameter of the lower opening of the cylinder is smaller than that of the upper opening.

Both ends of the furnace base are symmetrically provided with sewage outlets.

The beneficial effects of the utility model:

The utility model is a three-pass environment-friendly and energy-saving hot blast stove with simple structure, convenience and practicality, and low cost. It is not only durable, safe and reliable, easy to install, and has a wide range of applications. This product has high heat exchange temperature, high heat utilization rate, small size, stable hot air temperature, no switching mechanism, long service life, low maintenance cost and low purchase cost; as far as the applicant knows, this hot air stove should be the original new products in the field.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

Fig. 1 is a combined cross-sectional structure schematic diagram of the utility model.

Fig. 2 is a structural schematic diagram of the upwind route and the downwind route.

Fig. 3 is a schematic diagram of the structure of the wall body of the first layer.

Fig. 4 is a schematic diagram of the structure of the second layer of wall body.

Fig. 5 is a schematic diagram of the structure of the wall body of the third layer.

Fig. 6 is a schematic diagram of the structure of the wall body of the fourth layer.

Fig. 7 is a schematic structural view of the fifth layer of wall body.

Fig. 8 is a schematic diagram of the structure of the wall body of the sixth layer.

Fig. 9 is a schematic diagram of the structure of the wall body of the seventh layer.

Fig. 10 is a schematic structural view of the combination of the wall body and the air outlet on the first layer.

Detailed ways

According to Fig. 1-shown in Fig. 10, the utility model mainly comprises: the 1st layer wall body 1, the 2nd layer wall body 2, the 3rd layer wall body 3, the 4th layer wall body 4, the 5th layer wall body 5, The sixth layer of wall body 6, the seventh layer of wall body 7, the first cylinder body 8, the second cylinder body 9, the third cylinder body 10, the fourth cylinder body 11, the fifth cylinder body 12, the air outlet 13, the feed Port 14, heat transfer air duct 15, first heat dissipation flue 16, second heat dissipation flue 17, second outlet 18, cold air inlet 19, cold air duct 20, first opening 21, flue pipe 22, vertical smoke Road 23, vertical air duct 24, upwind route 25, downwind route 26, furnace base 27, sewage outlet 28, second opening 29, motor 30.

The hot blast stove includes: the first wall 1, the second wall 2, the third wall 3, the fourth wall 4, the fifth wall 5, the sixth wall 6, and the seventh wall Body 7, the first 7 are sequentially inserted and fixedly connected to each other; the first wall body 1 is cup-shaped; the middle part of the first layer wall body 1 is provided with a first cylinder 8, and the outer circumference of the first cylinder 8 is provided with multiple channels A spiral heat transfer air channel 15, the first cylinder body 8 is sealed and fixedly connected with the inner wall of the second wall body 2 through the heat transfer air channel 15; the upper part and the lower part of the first cylinder body 8 are respectively connected to the second cylinder body 9 , the third cylindrical body 10 is fixedly connected; the second cylindrical body 9 is fixedly connected with the fourth cylindrical body 11, the fourth cylindrical body 11 is fixedly connected with the top of the third layer wall body 3, the third cylindrical body 10 is connected with the fifth cylindrical body 12 is fixed and connected; the top of the second layer of wall body 2 is provided with a first opening 21, and the fourth cylinder body 11 is arranged in the first opening 21; the second layer of wall body 2 is arranged on the first layer of wall body 1 and the third layer of Between the wall bodies 3, the wall body 2 of the second layer is fixedly connected with the wall body 1 of the first layer through multiple heat transfer air channels 15, and the wall body 2 of the second layer is connected with the wall body of the third layer through multiple heat transfer air channels 15. The inner wall of the body 3 is fixedly connected; the lower end of the third layer of wall body 3 is fixedly connected with the lower end of the fifth layer of wall body 5, and the connection between the fourth layer of wall body 4 and the third layer of wall body 3 constitutes the first cooling flue 16. The first heat dissipation flue 16 is fixedly connected to the multi-channel vertical flue 23 composed of multiple cooling fins through the second outlet 18, and the vertical flue 23 is sealed and arranged on the fourth wall 4 and the fifth wall 5 between; the fourth wall body 4 seals and fixedly connects the upper part of the third layer wall body 3; the upper end of the fifth layer wall body 5 is provided with a second opening 29; Pipe 22, the lower end of the flue pipe 22 is fixedly connected with the furnace foundation 27; the wall body 5 of the fifth layer is fixedly connected with the wall body 6 of the sixth layer through a plurality of flue pipes 22; the wall body 6 of the sixth layer is connected with the furnace foundation 27 A cold air duct 20 is formed between them, and the outer periphery of the sixth-layer wall body 6 is provided with a plurality of vertical air ducts 24, and the seventh-layer wall body 7 provided with a cold air inlet port 19 at the upper end passes through the vertical air duct 24 and the sixth-layer wall body. 6 and the furnace base 27 are fixedly connected; the air outlet 13 is fixedly connected with the second layer of wall body 2 and the seventh layer of wall body 7, and the air outlet 13 is symmetrically arranged on both sides of the hot blast stove; the inlet 14 is connected with the first layer of wall body 1 It is fixedly connected with the wall body 7 of the seventh layer; the lower ends of the wall body 1 of the first layer, the wall body 2 of the second layer, the wall body 5 of the fifth layer and the wall body 6 of the sixth layer are fixedly connected with the furnace base 27.

The 1st wall 1, the 2nd wall 2, the 3rd wall 3, the 4th wall 4, the 5th wall 5, the 6th wall 6, the 7th wall 7, the 7th wall The cross-sectional shapes of the 1st cylinder 8, the 2nd cylinder 9, the 3rd cylinder 10, the 4th cylinder 11, and the 5th cylinder 12 are circular or square; the first wall 1, the second wall 2. The 3rd wall 3, the 4th wall 4, the 5th wall 5, the 6th wall 6, the 7th wall 7, the 1st cylinder 8, the 2nd cylinder 9, the 5th wall The top profiles of the 3 cylinders 10, the 4th cylinder 11, and the 5th cylinder 12 are in the shape of a truncated cone, and the diameter of the lower opening of the third cylinder 10 is smaller than that of the upper opening.

Both ends of the furnace base 27 are symmetrically provided with sewage outlets 28 .

working principle:

The hot air generated after the first layer of wall body 1 is heated rises from the bottom of the fifth cylinder body 12 to the third cylinder body 10, passes through the first cylinder body 8 to the second cylinder body 9, and rises concentratedly to the fourth cylinder body 11 After entering the wall body 4 of the 4th layer, it sinks along the top of the wall body 4 of the 4th layer and enters the wall body 5 of the 5th layer through the second outlet 18, and the hot air passes through the top of the wall body 5 of the 5th layer The openings are lowered to the surroundings, and the hot air enters into the furnace base 27 after passing into each flue pipe 22 .

The cold air outside the furnace enters the furnace from the cold air inlet 19 on the top of the furnace, sinks to the bottom along the periphery, enters the third layer of wall 3 through the cold air passage 20 at the bottom, and rises through multiple heat transfer air passages 15 Enter in the second layer of wall body 2, then it continues to string down to the bottom, and then is provided with air outlet 13 to discharge outside the furnace by both ends.

The air ducts are all spiral heat transfer fins, the seal is 0, and each layer of heat transfer fins has a total of 24 pieces; the flue is all vertical heat sinks, the seal is 0, and each layer of heat transfer fins has a total of 12 pieces; the flue square tube is divided into 12 equal parts , the distance between square tubes is 50mm; the distance between air ducts is 70mm, and the distance between flue ducts is 30mm; both air ducts and flue ducts are completed through three-pass operation.

Claims (3)

1. backhaul environmental protection and energy saving hot-blast stove, comprise: feeding mouth, it is characterized in that: hot-blast stove comprises: the 1st layer of wall body (1), the 2nd layer of wall body (2), the 3rd layer of wall body (3), the 4th layer of wall body (4), the 5th layer of wall body (5), the 6th layer of wall body (6), the 7th layer of wall body (7), and preceding 7 are inserted in connection fastened to each other successively; The 1st layer of wall body (1) is the cup shape; The middle part of the 1st layer of wall body (1) is provided with the 1st cylindrical shell (8), and the periphery of the 1st cylindrical shell (8) is provided with the spiral heat transfer of multiple tracks air channel (15), and the 1st cylindrical shell (8) is fixedlyed connected with the inner wall sealing of the 2nd layer of wall body (2) by heat transfer air channel (15); Fixedly connected with the 2nd cylindrical shell (9), the 3rd cylindrical shell (10) respectively in the top of the 1st cylindrical shell (8), bottom; The 2nd cylindrical shell (9) fixedly is communicated with the 4th cylindrical shell (11), and the 4th cylindrical shell (11) is fixedlyed connected with the top of the 3rd layer of wall body (3), and the 3rd cylindrical shell (10) fixedly is communicated with the 5th cylindrical shell (12); The top of the 2nd layer of wall body (2) is provided with the 1st opening (21), and the 4th cylindrical shell (11) is located in the 1st opening (21); The 2nd layer of wall body (2) be located at the 1st layer of wall body (1) and and the 3rd layer of wall body (3) between, the 2nd layer of wall body (2) fixedlyed connected with the 1st layer of wall body (1) by multiple tracks heat transfer air channel (15), and the 2nd layer of wall body (2) fixedlyed connected with the inwall of the 3rd layer of wall body (3) by multiple tracks heat transfer air channel (15); Fixedly connected with the lower end of the 5th layer of wall body (5) in the lower end of the 3rd layer of wall body (3), fixedly be communicated with between the 4th layer of wall body (4) and the 3rd layer of wall body (3) and constitute the 1st heat radiation flue (16), the 1st heat radiation flue (16) fixedly is communicated with the multiple tracks vertical gas pass (23) that is made of the polylith fin through the 2nd outlet (18), and vertical gas pass (23) sealing is located between the 4th layer of wall body (4) and the 5th layer of wall body (5); The 4th layer of wall body (4) is fixedly connected with the top sealing of the 3rd layer of wall body (3), the upper end of the 5th layer of wall body (5) is provided with the 2nd opening (29), the periphery of the 5th layer of wall body (5) is provided with a plurality of flue tubes (22), and the lower end of flue tube (22) fixedly is communicated with furnace foundation (27); The 5th layer of wall body (5) fixedlyed connected with the 6th layer of wall body (6) by a plurality of flue tubes (22); Constitute between the 6th layer of wall body (6) and the furnace foundation (27) and advance cold air duct (20), the periphery of the 6th layer of wall body (6) is provided with a plurality of vertical air channels (24), and the 7th layer of wall body (7) that the upper end is provided with cold wind mouth (19) into fixedlyed connected with furnace foundation (27) with the 6th layer of wall body (6) through vertical air channel (24); Air outlet (13) fixedly is communicated with the 2nd layer of wall body (2) and the 7th layer of wall body (7), and air outlet (13) is symmetrically set in the both sides of hot-blast stove; Feeding mouth (14) fixedly is communicated with the 1st layer of wall body (1) and the 7th layer of wall body (7); Fixedly connected with furnace foundation (27) in the lower end of the 1st layer of wall body (1), the 2nd layer of wall body (2), the 5th layer of wall body (5), the 6th layer of wall body (6).

2. three backhaul environmental protection and energy saving hot-blast stoves according to claim 1 is characterized in that: the shape of cross section of described the 1st layer of wall body (1), the 2nd layer of wall body (2), the 3rd layer of wall body (3), the 4th layer of wall body (4), the 5th layer of wall body (5), the 6th layer of wall body (6), the 7th layer of wall body (7), the 1st cylindrical shell (8), the 2nd cylindrical shell (9), the 3rd cylindrical shell (10), the 4th cylindrical shell (11), the 5th cylindrical shell (12) is for circular or square; The top profile of the 1st layer of wall body (1), the 2nd layer of wall body (2), the 3rd layer of wall body (3), the 4th layer of wall body (4), the 5th layer of wall body (5), the 6th layer of wall body (6), the 7th layer of wall body (7), the 1st cylindrical shell (8), the 2nd cylindrical shell (9), the 3rd cylindrical shell (10), the 4th cylindrical shell (11), the 5th cylindrical shell (12) is round table-like, and the under shed diameter of the 3rd cylindrical shell (10) is littler than upper shed diameter.

3. three backhaul environmental protection and energy saving hot-blast stoves according to claim 1, it is characterized in that: the two ends of described furnace foundation (27) are arranged with sewage draining exit (28).

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