CN111649577A - Energy-saving system and use method of tea drying hot blast stove - Google Patents

Abstract

The invention provides an energy-saving system and a use method of a tea drying hot blast stove. The top of the combustion stove is provided with a flue gas outlet, and the flue gas outlet is connected with the flue gas inlet of a waste heat exchange box through a flue gas return pipe. A smoke exhaust pipe is installed on the top of the other side of the box, an air inlet pipe is installed on the bottom side of the front side wall of the waste heat exchange box, a blower is installed at the other end of the air inlet pipe, and the front side wall of the waste heat exchange box is installed. An air outlet pipe is installed on the other side of the bottom of the furnace, the air outlet pipe is connected with the air supply port of the combustion furnace, and the hot air outlet of the combustion furnace is connected with the chain plate dryer through the hot air drying pipe. This energy-saving system greatly improves the utilization rate of energy and effectively reduces energy consumption by reusing the exhaust gas generated in the combustion furnace.

Description

Energy-saving system and use method of tea drying hot blast stove

technical field

The invention belongs to the field of tea processing devices, and particularly relates to an energy-saving system and a use method of a tea drying hot blast stove.

Background technique

In the process of tea processing, there is a drying process. At present, the drying usually used is hot air drying. In the hot air drying process, a coal-fired hot-air furnace is mainly used, and the air is heated by burning coal and then transported to a dryer for drying. However, the combustion furnace will generate a large amount of hot exhaust gas during the combustion process. At present, the exhaust gas is directly discharged after simple environmental protection treatment. The above method causes a large amount of heat loss and increases energy consumption.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the present invention provides an energy-saving system for a hot blast stove for drying tea.

In order to realize the above-mentioned technical features, the purpose of the present invention is to achieve: an energy-saving system for a tea drying hot blast stove, which includes a combustion furnace, and the lower side wall of the combustion furnace is provided with a flue gas outlet, and the smoke outlet The flue gas return pipe is connected to the flue gas inlet of the waste heat exchange box. A smoke exhaust pipe is installed on the top of the other side of the waste heat exchange box, and an air inlet pipe is installed on the bottom side of the front side wall of the waste heat exchange box. A blower is installed on the other end of the air inlet pipe, and an air outlet pipe is installed on the other side of the bottom of the front side wall of the waste heat exchange box, and the air outlet pipe is communicated with the air supply port of the combustion furnace. The hot air outlet is connected with the chain plate dryer through the hot air drying pipe.

A furnace bridge is arranged inside the combustion furnace, a fuel feeding door is arranged on the front side wall of the combustion furnace, and a furnace body supporting leg is arranged at the bottom of the whole combustion furnace.

The waste heat exchange box includes a first outer plate, a first inner plate, a spoiler, a second inner plate, a second outer plate, a front side plate and a top plate; the first outer plate and the first inner plate are formed between the first outer plate and the first inner plate. The first flue gas reversing cavity is provided with a flue gas return hole at the bottom of the first outer plate, and the flue gas return pipe is communicated with the flue gas return hole; the first inner plate and the second inner plate are formed between the first inner plate and the second inner plate. The preheating cavity is correspondingly machined with through holes on the first inner side plate and the second inner side plate, and the through holes are connected by a heat exchange pipe, and the middle part of the heat exchange pipe is supported on the spoiler plate; the A second flue gas reversing cavity is formed between the second inner plate and the second outer plate; a flue gas exhaust port is provided on the top plate and at the top of the second flue gas reversing cavity, and the exhaust pipe is fixedly installed On the flue gas discharge port, an air inlet is provided on the front side plate and at the bottom of one side of the first flue gas reversing cavity, the air inlet is communicated with the air inlet pipe, and the front side plate is parallel to An air outlet is arranged at the bottom of one side close to the second flue gas reversing cavity, and the air outlet is communicated with the air outlet pipe.

The blower is communicated with the air inlet pipe through a joint pipe.

The box body of the chain plate dryer is supported on the box body base, and the box body base is installed on the top of the drying rack.

A smoke spoiler is arranged between the first outer plate and the first inner plate and between the second inner plate and the second outer plate.

A space is provided between the top of the spoiler and the top plate.

The heat exchange pipe adopts a metal pipe, the heat insulation layer is arranged on the outside of the waste heat exchange box, and the bottom of the waste heat exchange box is installed with support feet.

The smoke exhaust pipe is connected to the air inlet of the smoke extraction machine, and the hot air drying pipe is provided with a temperature sensor. Smoke machine on and off.

The use method of the energy-saving system of the tea drying hot blast stove includes the following steps:

Step 1: Connect the combustion furnace and the waste heat exchange box through the flue gas return pipe;

Step 2: Connect the combustion furnace and the chain plate dryer through the hot air drying pipe;

Step 3: Connect the waste heat exchange box and the combustion furnace through the air outlet pipe;

Step 4: Connect the blower to the waste heat exchange box through the air inlet pipe;

Step 5: Add fuel to the inside of the combustion furnace, and start the blower to pass normal temperature air into the preheating cavity of the waste heat exchange box. At this time, the air will enter the air outlet from the air outlet after the turbulence, and then pass through the air outlet. It enters the combustion furnace, and is discharged from the hot air drying pipe after being heated up by combustion, and enters the chain plate dryer to dry the tea leaves inside;

Step 6: During the combustion process of the combustion furnace, the flue gas enters the first flue gas reversing cavity of the waste heat exchange box from the flue gas outlet through the flue gas return pipe, and the hot flue gas will enter the uniformly distributed heat exchange pipe again. The heat exchange is performed with the normal temperature air inside the preheating cavity through the heat exchange tube, and then the normal temperature air is preliminarily preheated;

Step 7: After the normal temperature air is preheated, after passing through the top of the spoiler, it enters the air outlet from the air outlet, and then enters the combustion furnace through the air outlet, and is heated up again through combustion and then discharged from the hot air drying tube. , enter the chain plate dryer to dry the tea leaves inside;

Step 8: The flue gas after the heat exchange enters the second flue gas reversing cavity after cooling down, and is finally discharged through the flue gas exhaust pipe.

The present invention has the following beneficial effects:

1. This energy-saving system greatly improves the utilization rate of energy and effectively reduces energy consumption by reusing the exhaust gas generated in the combustion furnace.

2. The air can be heated by the above-mentioned combustion furnace.

3. Through the waste heat exchange box of the above structure, the waste heat of the flue gas discharged from the combustion furnace can be reused, thereby achieving the purpose of energy saving.

4. The above-mentioned chain plate dryer can be used to dry tea leaves.

5. By setting the interval, it can ensure that the normal temperature air forms a turbulent flow inside the preheating cavity, thereby maximizing the utilization rate of its thermal energy.

Description of drawings

The present invention will be further described below with reference to the accompanying drawings and embodiments.

FIG. 1 is a schematic diagram of the system of the present invention.

Fig. 2 is the exploded structure diagram of the waste heat exchange box of the present invention.

In the figure: furnace body support leg 1, combustion furnace 2, fuel adding door 3, hot air drying pipe 4, drying rack 5, box base 6, chain plate dryer 7, flue gas outlet 8, flue gas return Pipe 9, blower 10, joint pipe 11, air inlet pipe 12, waste heat exchange box 13, air outlet pipe 14, smoke exhaust pipe 15, first outer plate 16, flue gas return hole 17, through hole 18, first inner plate 19. Air inlet 20, front side panel 21, air outlet 22, heat exchange tube 23, spoiler 24, top panel 25, smoke exhaust port 26, second inner panel 27, second outer panel 28, first smoke The reversing cavity 29 , the preheating cavity 30 , the second flue gas reversing cavity 31 , and the flue gas spoiler 32 .

A is the flow direction of flue gas; B is the flow direction of normal temperature air; C is the flow direction of hot air.

Detailed ways

The embodiments of the present invention will be further described below with reference to the accompanying drawings.

Example 1:

1-2, the energy-saving system of a tea drying hot blast stove, which includes a combustion furnace 2, the top of the combustion furnace 2 is provided with a flue gas outlet 8, and the flue gas outlet 8 is exchanged with waste heat through a flue gas return pipe 9 The flue gas inlets 17 of the box 13 are connected to each other, a smoke exhaust pipe 15 is installed on the top of the other side of the waste heat exchange box 13, and an air inlet pipe 12 is installed on the bottom side of the front side wall of the waste heat exchange box 13. A blower 10 is installed on the other end of the air duct 12, and an air outlet duct 14 is installed on the other side of the bottom of the front side wall of the waste heat exchange box 13, and the air outlet duct 14 is communicated with the air supply port of the combustion furnace 2, so The hot air outlet of the combustion furnace 2 is connected to the chain plate dryer 7 through the hot air drying pipe 4 . This energy-saving system greatly improves the utilization rate of energy and effectively reduces energy consumption by reusing the exhaust gas generated in the combustion furnace. In the specific working process, after the air inside the furnace is heated and heated by the combustion furnace 2, it is introduced into the chain plate dryer 7 to effectively dry the tea leaves, and the hot flue gas generated by the combustion furnace 2 during the combustion process will Through the flue gas return pipe 9, it is returned to the waste heat exchange box 13, and the room temperature air is preheated through the waste heat exchange box 13, so as to achieve preliminary heating and temperature rise, so as to further utilize the heat energy, and then re-enter the interior of the combustion furnace 2 after preheating .

Further, a furnace bridge is arranged inside the combustion furnace 2 , a fuel feeding door 3 is arranged on the front side wall of the combustion furnace 2 , and a furnace body supporting leg 1 is arranged at the bottom of the entire combustion furnace 2 . Air can be heated by the above-mentioned combustion furnace 2 .

Further, the waste heat exchange box 13 includes a first outer plate 16, a first inner plate 19, a spoiler 24, a second inner plate 27, a second outer plate 28, a front side plate 21 and a top plate 25; A first flue gas reversing cavity 29 is formed between an outer plate 16 and the first inner plate 19, and a flue gas return hole 17 is provided at the bottom of the first outer plate 16. The flue gas return pipe 9 is connected to the flue gas return hole. 17 are connected; a preheating cavity 30 is formed between the first inner plate 19 and the second inner plate 27 , and through holes 18 and 18 are correspondingly processed on the first inner plate 19 and the second inner plate 27 They are connected by a heat exchange pipe 23, and the middle part of the heat exchange pipe 23 is supported on the spoiler 24; a second flue gas reversing cavity is formed between the second inner plate 27 and the second outer plate 28 31; a smoke exhaust port 26 is provided on the top plate 25 and at the top of the second flue gas reversing cavity 31, the smoke exhaust pipe 15 is fixedly installed on the smoke exhaust port 26, and the front side plate 21 An air inlet 20 is arranged at the bottom of one side near the first flue gas reversing cavity 29, the air inlet 20 is communicated with the air inlet pipe 12, and the front side plate 21 is on and close to the second flue gas reversing cavity. An air outlet 22 is provided at the bottom of one side of the body 31 , and the air outlet 22 communicates with the air outlet duct 14 . With the waste heat exchange box 13 of the above structure, the waste heat of the flue gas discharged from the combustion furnace 2 can be reused, thereby achieving the purpose of energy saving. In the specific use process, the high-temperature flue gas will enter the first flue gas reversing cavity 29 through the flue gas return pipe 9, and enter the uniformly distributed heat exchange pipes 23 through the first flue gas reversing cavity 29, and through the heat exchange The pipe 23 preheats the normal temperature air inside the preheating cavity 30, thereby realizing the preliminary heating of the air, and the flue gas after heat exchange will enter the second flue gas reversing cavity 31, and pass through the flue gas spoiler The bypass flow at 32 then returns to the first flue gas reversing cavity 29, thereby realizing a reciprocating bypass flow. Finally, it is discharged from the smoke exhaust pipe 15; and the preheated air will enter the combustion furnace 2 through the air outlet pipe 14 to be reheated and heated up.

Further, the blower 10 communicates with the air inlet pipe 12 through the joint pipe 11 . The above-mentioned blower 10 can be used for air supply.

Further, the box body of the chain plate dryer 7 is supported on the box body base 6 , and the box body base 6 is installed on the top of the drying rack 5 . The above-mentioned chain plate dryer 7 can be used for drying tea leaves.

Further, a smoke spoiler 32 is provided between the first outer plate 16 and the first inner plate 19 and between the second inner plate 27 and the second outer plate 28 . The waste heat utilization efficiency of the entire waste heat exchange box 13 is enhanced by the above-mentioned flue gas spoiler 32 .

Further, a space is provided between the top of the spoiler 24 and the top plate 25 . By setting the interval, it can be ensured that the normal temperature air forms a turbulent flow inside the preheating cavity 30, thereby maximizing the utilization rate of its thermal energy.

Further, the heat exchange tube 23 is a metal tube, a heat insulation layer is provided on the outside of the waste heat exchange box 13 , and support feet are installed at the bottom of the waste heat exchange box 13 . The use of metal tube materials can achieve a good heat exchange effect.

Further, the smoke exhaust pipe 15 is connected with the air inlet of the smoke extraction machine, and the hot air drying pipe 4 is provided with a temperature sensor, and the temperature sensor is connected with a control box through a signal line, and the control box is as required. Set the temperature to control the start and stop of the smoke extractor. Through the above-mentioned control method, automatic temperature control can be realized.

Further, by arranging the air inlet 20 on the side close to the first flue gas reversing cavity 29, the maximization of thermal energy utilization is ensured.

Example 2:

The use method of the energy-saving system of the tea drying hot blast stove comprises the following steps:

Step 1: Connect the combustion furnace 2 and the waste heat exchange box 13 through the flue gas return pipe 9;

Step 2: connect the combustion furnace 2 and the chain plate dryer 7 through the hot air drying pipe 4;

Step 3: connect the waste heat exchange box 13 and the combustion furnace 2 through the air outlet pipe 14;

Step 4: connect the blower 10 to the waste heat exchange box 13 through the air inlet pipe 12;

Step 5: Add fuel to the interior of the combustion furnace 2, and start the blower 10 to pass air at room temperature into the preheating cavity 30 of the waste heat exchange box 13. At this time, the air will enter the air outlet 14 from the air outlet 22 after passing through the turbulence. , and then enter the interior of the combustion furnace 2 by the air outlet pipe 14, and discharge from the hot air drying pipe 4 after heating up by combustion, and enter the chain plate dryer 7 to dry the tea leaves inside;

Step 6: During the combustion process of the combustion furnace 2, the flue gas enters the first flue gas reversing cavity 29 of the waste heat exchange box 13 from the flue gas outlet 8 through the flue gas return pipe 9, and the hot flue gas will enter the uniform distribution again. The heat exchange pipe 23 is used to exchange heat with the normal temperature air inside the preheating cavity 30 through the heat exchange pipe 23, and then preliminarily preheat the normal temperature air;

Step 7: After the normal temperature air is preheated, after passing through the top of the spoiler 24, it enters the air outlet 14 through the air outlet 22, and then enters the combustion furnace 2 through the air outlet 14, and then heats up again through combustion. The hot air drying pipe 4 is discharged and enters the chain plate dryer 7 to dry the tea leaves inside;

Step 8: After the heat exchange, the flue gas enters the second flue gas reversing cavity 31 after being cooled, and is finally discharged through the flue gas exhaust pipe 15 .

Claims (10)

1. Energy-saving system of tealeaves stoving hot-blast furnace, its characterized in that: the waste heat recovery device comprises a combustion furnace (2), wherein a flue gas outlet (8) is formed in the side wall of the lower portion of the combustion furnace (2), the flue gas outlet (8) is connected with a flue gas inlet (17) of a waste heat exchange box (13) through a flue gas return pipe (9), a smoke exhaust pipe (15) is installed at the top of the other side of the waste heat exchange box (13), an air inlet pipe (12) is installed on one side of the bottom of the front side wall of the waste heat exchange box (13), an air blower (10) is installed at the other end of the air inlet pipe (12), an air outlet pipe (14) is installed on the other side of the bottom of the front side wall of the waste heat exchange box (13), the air outlet pipe (14) is communicated with an air supply port of the combustion furnace (2), and a hot air outlet of the combustion.

2. The energy saving system of the tea drying hot blast stove according to claim 1, characterized in that: the furnace is characterized in that a furnace bridge is arranged in the combustion furnace (2), a fuel feeding door (3) is arranged on the front side wall of the combustion furnace (2), and furnace body supporting legs (1) are arranged at the bottom of the whole combustion furnace (2).

3. The energy saving system of the tea drying hot blast stove according to claim 1, characterized in that: the waste heat exchange box (13) comprises a first outer side plate (16), a first inner side plate (19), a spoiler (24), a second inner side plate (27), a second outer side plate (28), a front side plate (21) and a top plate (25); a first flue gas reversing cavity (29) is formed between the first outer side plate (16) and the first inner side plate (19), a flue gas backflow hole (17) is formed in the bottom of the first outer side plate (16), and the flue gas backflow pipe (9) is communicated with the flue gas backflow hole (17); a preheating cavity (30) is formed between the first inner side plate (19) and the second inner side plate (27), through holes (18) are correspondingly processed on the first inner side plate (19) and the second inner side plate (27), the through holes (18) are connected through heat exchange tubes (23), and the middle parts of the heat exchange tubes (23) are supported on the spoilers (24); a second flue gas reversing cavity (31) is formed between the second inner side plate (27) and the second outer side plate (28); the top that is located second flue gas switching-over cavity (31) on roof (25) is provided with flue gas discharge port (26), discharge fume pipe (15) fixed mounting is on flue gas discharge port (26), on preceding curb plate (21) and be close to one side bottom of first flue gas switching-over cavity (29) and be provided with air intake (20), air intake (20) are linked together with air-supply line (12), on preceding curb plate (21) and be close to one side bottom of second flue gas switching-over cavity (31) and be provided with air outlet (22), air outlet (22) are linked together with air-out pipe (14).

4. The energy saving system of the tea drying hot blast stove according to claim 1, characterized in that: the air blower (10) is communicated with the air inlet pipe (12) through a joint pipe (11).

5. The energy saving system of the tea drying hot blast stove according to claim 1, characterized in that: the box body of the chain plate dryer (7) is supported on a box body base (6), and the box body base (6) is installed at the top of the drying rack (5).

6. The energy saving system of the tea drying hot blast stove according to claim 1, characterized in that: and a smoke spoiler (32) is arranged between the first outer side plate (16) and the first inner side plate (19) and between the second inner side plate (27) and the second outer side plate (28).

7. The energy saving system of the tea drying hot blast stove according to claim 3, characterized in that: and a gap is arranged between the top of the spoiler (24) and the top plate (25).

8. The energy saving system of the tea drying hot blast stove according to claim 3, characterized in that: the heat exchange tube (23) is a metal tube, a heat insulation layer is arranged outside the waste heat exchange box (13), and supporting legs are installed at the bottom of the waste heat exchange box (13).

9. The energy saving system of the tea drying hot blast stove according to claim 1, characterized in that: the smoke exhaust pipe (15) is connected with an air inlet of a smoke leading machine, a temperature sensor is arranged at the hot air drying pipe (4), the temperature sensor is connected with the control box through a signal line, and the control box controls the smoke leading machine to start and stop according to the required set temperature.

10. Use of the energy saving system of a tea leaf drying hot blast stove according to any of claims 1 to 9, characterized in that it comprises the following steps:

step 1: the combustion furnace (2) is connected with the waste heat exchange box (13) through a flue gas return pipe (9);

step 2: the combustion furnace (2) is connected with the chain plate dryer (7) through a hot air drying pipe (4);

and step 3: the waste heat exchange box (13) is connected with the combustion furnace (2) through an air outlet pipe (14);

and 4, step 4: the air blower (10) is connected with a waste heat exchange box (13) through an air inlet pipe (12);

and 5: adding fuel into the combustion furnace (2), starting the air blower (10) to introduce normal-temperature air into the preheating cavity (30) of the waste heat exchange box (13), leading the air to enter the air outlet pipe (14) from the air outlet (22) after passing through turbulent flow, then leading the air to enter the combustion furnace (2) from the air outlet pipe (14), and leading the air to be discharged from the hot air drying pipe (4) after being heated by combustion and then to enter the chain plate dryer (7) to dry tea leaves inside the combustion furnace;

step 6: in the combustion process of the combustion furnace (2), flue gas enters a first flue gas reversing cavity (29) of the waste heat exchange box (13) from a flue gas outlet (8) through a flue gas return pipe (9), hot flue gas enters uniformly distributed heat exchange pipes (23) again, and heat exchange is carried out between the hot flue gas and normal-temperature air in the preheating cavity (30) through the heat exchange pipes (23), so that the normal-temperature air is preliminarily preheated;

and 7: after the air at normal temperature is preheated, the air enters the air outlet pipe (14) from the air outlet (22) after being disturbed by the top of the spoiler (24), then enters the combustion furnace (2) from the air outlet pipe (14), is discharged from the hot air drying pipe (4) after being heated again by combustion, and enters the chain plate dryer (7) to dry the tea leaves inside the chain plate dryer;

and 8: the flue gas after heat exchange enters a second flue gas reversing cavity (31) after temperature reduction, and is finally discharged through a smoke discharge pipe (15).

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