CN211926450U

CN211926450U - Small-size internal circulation steam drying furnace

Info

Publication number: CN211926450U
Application number: CN202020304336.8U
Authority: CN
Inventors: 彭聪
Original assignee: Hebei Xingyi Machinery Equipment Co ltd
Current assignee: Hebei Xingyi Machinery Equipment Co ltd
Priority date: 2020-03-12
Filing date: 2020-03-12
Publication date: 2020-11-13
Anticipated expiration: 2030-03-12

Abstract

The utility model relates to a drying furnace technical field especially relates to a small-size inner loop steam drying furnace. The filter element is arranged in the return air pipe, the air supplementing pipe is vertically arranged on one side of the middle part of the return air pipe, the filter elements are arranged at the positions of the return air pipe and the air supplementing pipe, and air flow at the positions of the return air port and the air supplementing port can be filtered, so that impurities in hot air flow are prevented from being attached to a workpiece to cause pollution during drying; the air supply pipe is provided with the adjusting valve, the cold air supply amount can be controlled by controlling the opening and closing degree of the adjusting valve, the content of combustion air of the burner is guaranteed, and the fuel gas can more fully achieve the effects of energy conservation and environmental protection.

Description

Small-size internal circulation steam drying furnace

Technical Field

The utility model relates to a drying furnace technical field especially relates to a small-size inner loop steam drying furnace.

Background

Need align and dry after work piece spraying, steel sheet cleaning process, current drying-oven is through heating the air, then heats the stoving through the fan circulation, and the circulation heating pipeline and the air-supply line of drying-machine do not all possess filtration system, on debris can adhere to the work piece under the heated air circulation air current, seriously influence the processingquality of work piece.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the technical deficiency exists is aimed at, and a small-sized internal circulation water vapor drying furnace is provided, which comprises a filter element arranged in the return air pipe, an air supplementing pipe vertically arranged on one side of the middle part of the return air pipe, and filter elements arranged at the positions of the return air pipe and the air supplementing pipe, and can filter the air flow at the positions of the return air pipe and the air supplementing pipe, so as to prevent the sundries in the hot air flow from attaching to the workpiece to pollute the workpiece during drying; be provided with the governing valve on the air supply pipe, the cold wind input is controlled to the degree of opening and shutting of accessible control governing valve, guarantees nitrogen gas combustion engine's combustion air content, and gas fuel fully reaches energy-concerving and environment-protective effect more.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the low-nitrogen combustion device comprises a main air pipe, a return air pipe, a low-nitrogen combustor and a motor; a circulating air chamber is fixedly arranged in the middle of the right side of the main air pipe; a fire protection cylinder is fixedly arranged above the middle part of the circulating air chamber in the vertical direction; a combustion cylinder is arranged below the low-nitrogen combustor; the combustion cylinder is fixedly arranged in the fire protection cylinder; the combustion cylinder is communicated with the circulating air chamber; an outer air inlet is formed in one side of the top of the low-nitrogen combustor; the position of the outer air inlet is fixedly provided with a reducing hole.

In a further optimized scheme, the air return pipe is fixedly arranged at one end with the variable diameter.

In a further optimized scheme, a filter element is arranged in the return air pipe; the right end of the filter element is sealed; the filter element is provided with an opening at the left end.

In a further optimized scheme, a check ring is arranged at the left end inside the air return pipe; the inner diameter of the retainer ring is smaller than that of the filter element.

According to a further optimized scheme, an air supplementing pipe is vertically arranged on one side of the middle part of the air return pipe; and the air supplementing pipe is provided with an adjusting valve.

In the further optimized scheme, a centrifugal fan is fixedly arranged in the circulating air chamber; an inner air inlet is formed in one side of the centrifugal fan; the inner air inlet is communicated with the circulating air chamber.

In the further optimized scheme, a through groove is formed in the circulating air chamber on the right side of the main air pipe; an exhaust pipe is arranged at the right end of the centrifugal fan; the exhaust pipe penetrates through the middle part of the through groove in a sealing manner; the exhaust pipe is communicated with the main air pipe; the motor is fixedly arranged on one side of the centrifugal fan; the motor is arranged outside the circulating air chamber.

According to a further optimized scheme, fireproof canvas is wound and sealed at the connecting positions among the main air pipe, the return air pipe, the low-nitrogen combustor, the fire protection cylinder and the circulating air chamber.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses a drying machine, including return air duct, air supply pipe, air return pipe, air supply pipe, air return pipe, air supply pipe.

2. Be provided with the governing valve on the air supply pipe, the cold wind input is controlled to the degree of opening and shutting of accessible control governing valve, guarantees nitrogen gas combustion engine's combustion air content, and gas fuel fully reaches energy-concerving and environment-protective effect more.

3. After the filter core is used for a period of time, the return air pipe is disassembled, a new filter core is replaced, and the filter core is simple and convenient to replace.

4. The whole device is simple in design and installation, and the occupied space of the equipment is small.

Drawings

Fig. 1 is a perspective view of a drying part mounting structure of a small-sized internal circulation water vapor drying furnace.

FIG. 2 is a partial sectional view of the internal installation structure of the circulating air chamber of a small internal circulating water vapor drying oven.

FIG. 3 is a partial view of the installation position structure of a low-nitrogen burner of a small internal circulation water vapor drying oven.

Fig. 4 is a partial sectional view of a filter element position mounting structure of a small-sized internal circulation water vapor drying oven.

In the figure: 1. a main air duct; 2. a return air duct; 201. a retainer ring; 202. air supplementing pipes; 3. a low nitrogen combustor; 301. A combustion can; 302. an outer air inlet; 303. reducing; 4. a motor; 5. a circulating air chamber; 6. a fire protection cylinder; 7. a filter element; 8. adjusting a valve; 9. a centrifugal fan; 901. an inner air inlet; 902. an exhaust pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The first embodiment is as follows: with reference to fig. 1-4, a small-sized internal circulation water vapor drying oven is characterized in that: the device comprises a main air pipe 1, a return air pipe 2, a low-nitrogen burner 3 and a motor 4; a circulating air chamber 5 is fixedly arranged in the middle of the right side of the main air pipe 1; a fire protection cylinder 6 is fixedly arranged above the middle part of the circulating air chamber 5 in the vertical direction; a combustion cylinder 301 is arranged below the low-nitrogen combustor 3; the combustion cylinder 301 is fixedly arranged in the fire protection cylinder 6; the combustion barrel 301 is communicated with the circulating air chamber 5; an outer air inlet 302 is formed in one side of the top of the low-nitrogen combustor 3; the position of the outer air inlet 302 is fixedly provided with a reducing hole 303.

Preferably, the return air pipe 2 is fixedly arranged at one end of the reducing pipe 303.

Preferably, a filter element 7 is arranged in the air return pipe 2; the right end of the filter element 7 is sealed; the left end of the filter element 7 is open.

Preferably, a retainer ring 201 is arranged at the left end inside the air return pipe 2; the inner diameter of the retainer ring 201 is smaller than that of the filter element 7.

Preferably, an air supplementing pipe 202 is vertically arranged on one side of the middle part of the air return pipe 2; the air supplementing pipe 202 is provided with an adjusting valve 8.

Preferably, a centrifugal fan 9 is fixedly arranged inside the circulating air chamber 5; an inner air inlet 901 is formed in one side of the centrifugal fan 9; the inner air inlet 901 is communicated with the circulating air chamber 5.

Preferably, a through groove is formed in the circulating air chamber 5 on the right side of the main air pipe 1; an exhaust pipe 902 is arranged at the right end of the centrifugal fan 9; the exhaust pipe 902 penetrates through and is fixed in the middle of the through groove in a sealing manner; the exhaust pipe 902 is communicated with the main air pipe 1; the motor 4 is fixedly arranged on one side of the centrifugal fan 9; the motor 4 is disposed outside the circulating plenum 5.

Preferably, fireproof canvas is wound and sealed at the connecting positions among the main air pipe 1, the return air pipe 2, the low-nitrogen combustor 3, the fire protection cylinder 6 and the circulating air chamber 5.

When in use, in the first step, as shown in fig. 1-4, when the drying flue gas enters from the main air duct 1, an external air inlet 302 is arranged at the left side position of the top of the low-nitrogen burner 3; the position of the outer air inlet 302 is fixedly provided with the reducing 303, so under the action of a fan of the low-nitrogen combustor 3, hot air in a main pipeline can pass → the return air pipe 2 → the reducing 303 → the outer air inlet 302 → the low-nitrogen combustor 3 supports combustion, so that the effect of recycling heat energy is achieved, the hot air is mixed with fuel gas in the low-nitrogen combustor 3 to be combusted, and hot air enters the circulating air chamber 5 after being secondarily heated.

Because the inside of the circulating air chamber 5 is fixedly provided with the centrifugal fan 9; an inner air inlet 901 is formed in one side of the centrifugal fan 9; the inner air inlet 901 is communicated with the circulating air chamber 5; a through groove is arranged on the right side of the main air pipe 1 in the circulating air chamber 5; an exhaust pipe 902 is arranged at the left end of the centrifugal fan 9; the exhaust pipe 902 penetrates through and is fixed in the middle of the through groove in a sealing manner; the exhaust pipe 902 is communicated with the main air pipe 1; the motor 4 is fixedly arranged on one side of the centrifugal fan 9; the motor 4 is arranged outside the circulating air chamber 5', so that hot air can be driven into the main air duct 1 from the circulating air chamber 5 through the action of the centrifugal fan 9 in the circulating air chamber 5.

Step two, as shown in fig. 1-4, the filter element 7 is arranged in the return air pipe 2; the left end of the filter element 7 is sealed; the right end of the filter element 7 is provided with an opening', so that when hot air enters the low-nitrogen combustor 3, the hot air can be filtered through the filter element 7, and impurities in the hot air are filtered; an air supplementing pipe 202 is vertically arranged on one side of the middle part of the air return pipe 2; be provided with governing valve 8 on the air supply pipe 202, governing valve 8 is electromagnetism automatically regulated valve 8, when the combustion air oxygen content of low-nitrogen burner 3 reduces, governing valve 8 is automatic to be opened, outside air can enter into return air duct 2 inside through air supply pipe 202, outside air and hot cycle gas mix and enter into the combustor and carry out supplementary oxygen, combustion air content accessible control governing valve 8's the degree of opening and shutting controls the burnup of low-nitrogen burner 3, guarantee the gas and fully burn up, reach energy-concerving and environment-protective effect.

In conclusion, the filter element 7 is arranged inside the air return pipe 2, the air supply pipe 202 is vertically arranged on one side of the middle part of the air return pipe 2, the filter elements 7 are arranged at the positions of the air return pipe 2 and the air supply pipe 202, air flow at the positions of the air return port and the air supply port can be filtered, and therefore the situation that sundries in hot air flow are attached to a workpiece to pollute the workpiece during drying is avoided, and the problems that a circulating heating pipeline and an air inlet pipe of a drying machine are not provided with a filtering system, and the sundries can be attached to the workpiece under the hot air circulating air flow, and the processing quality of the.

A check ring 201 is arranged at the right end inside the air return pipe 2; the internal diameter of the retainer ring 201 is smaller than that of the filter element 7, after the filter element is used for a period of time, the return air pipe 2 is disassembled, the filter element 7 can be easily disassembled from the left end of the return air pipe 2, the filter element 7 can be replaced, the filter element 7 is simple and convenient to replace, the whole device is simple in design and installation, and the equipment occupation space is small.

The connection positions among the main air pipe 1, the return air pipe 2, the low-nitrogen combustor 3, the fire protection cylinder 6 and the circulating air chamber 5 are all wound and sealed with fireproof canvas, and the fireproof canvas can seal the connection positions of the pipelines to prevent flue gas leakage.

The utility model discloses a control mode comes automatic control through the controller, and the control circuit of controller can realize through the simple programming of technical staff in this field, belongs to the common general knowledge in this field, and the utility model discloses mainly be used for protecting mechanical device, so the utility model discloses no longer explain control mode and circuit connection in detail.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. The utility model provides a small-size inner loop steam drying furnace which characterized in that: comprises a main air pipe (1), a return air pipe (2), a low-nitrogen burner (3) and a motor (4); a circulating air chamber (5) is fixedly arranged in the middle of the right side of the main air pipe (1); a fire protection cylinder (6) is fixedly arranged above the middle part of the circulating air chamber (5) in the vertical direction; a combustion cylinder (301) is arranged below the low-nitrogen combustor (3); the combustion cylinder (301) is fixedly arranged in the fire protection cylinder (6); the combustion cylinder (301) is communicated with the circulating air chamber (5); an outer air inlet (302) is formed in one side of the top of the low-nitrogen combustor (3); the position of the outer air inlet (302) is fixedly provided with a reducing hole (303).

2. The small internal circulation water vapor drying oven according to claim 1, wherein: the return air pipe (2) is fixedly arranged at one end of the reducing pipe (303).

3. The small internal circulation water vapor drying oven according to claim 1, wherein: a filter element (7) is arranged in the return air pipe (2); the right end of the filter element (7) is sealed; the left end of the filter element (7) is open.

4. The small internal circulation water vapor drying oven according to claim 2 or 3, characterized in that: a check ring (201) is arranged at the left end inside the air return pipe (2); the inner diameter of the retainer ring (201) is smaller than that of the filter element (7).

5. The small internal circulation water vapor drying oven according to claim 1, wherein: an air supplementing pipe (202) is vertically arranged on one side of the middle part of the air return pipe (2); and the air supplementing pipe (202) is provided with an adjusting valve (8).

6. The small internal circulation water vapor drying oven according to claim 1, wherein: a centrifugal fan (9) is fixedly arranged in the circulating air chamber (5); an inner air inlet (901) is formed in one side of the centrifugal fan (9); the inner air inlet (901) is communicated with the circulating air chamber (5).

7. The small internal circulation water vapor drying oven of claim 6, wherein: a through groove is formed in the circulating air chamber (5) on the right side of the main air pipe (1); an exhaust pipe (902) is arranged at the right end of the centrifugal fan (9); the exhaust pipe (902) penetrates through the middle part of the through groove and is fixed in a sealing manner; the exhaust pipe (902) is communicated with the main air pipe (1); the motor (4) is fixedly arranged on one side of the centrifugal fan (9); the motor (4) is arranged outside the circulating air chamber (5).

8. The small internal circulation water vapor drying oven according to claim 1, wherein: fireproof canvas is wound and sealed at the connecting positions among the main air pipe (1), the return air pipe (2), the low-nitrogen combustor (3), the fire protection cylinder (6) and the circulating air chamber (5).