Waste heat collecting device for calcining furnace

Abstract

The utility model discloses a calcining furnace waste heat collecting device which comprises a tank body, an electrostatic dust collection device is arranged in the tank body, a heat exchanger is arranged below the electrostatic dust collection device, the heat exchanger is provided with a first waste heat pipeline and a second waste heat pipeline, and the heat exchanger is connected with a backflow cooling liquid storage tank. An evaporation kettle is arranged on one side of the backflow cooling liquid storage tank, and a cloth bag dust removal device is arranged in the tank body. Through the structure, the heat exchanger is internally divided into two parts, the middle flue is provided with the inlet and outlet gate, the inlet gate flexibly adjusts the amount of smoke entering the two parts according to requirements, the first waste heat pipeline is connected with the calcining furnace, the second waste heat pipeline conveys smoke to the evaporation kettle through the circulating pump, and the first waste heat pipeline and the second waste heat pipeline finally return to the backflow cooling liquid storage tank. And the filter is arranged on the pipeline and effectively prevents impurities in the medium from entering the system, so that equipment is protected, and the stability and reliability of system operation are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat collection, in particular to a waste heat collection device for a calciner. Background Art

[0002] The calcination process is used in many industries. A large amount of high-temperature flue gas is generated during the calcination process, and the waste heat contained in the flue gas is an important energy source. Utilizing and collecting it can reduce energy loss and production costs. Therefore, a waste heat collection device for a calciner is needed.

[0003] For a waste heat collection device of a calciner, the existing technologies all exchange the waste heat in the flue gas to a medium and transport it to a certain device for heat exchange. When the demand is not high, there will be too much heat, resulting in waste. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a waste heat collection device for a calciner, so that the collected waste heat of the flue gas can play its role fully, be transported to multiple devices, and be supplied according to actual needs to ensure the maximum utilization of heat.

[0005] In order to achieve the above purpose, a waste heat collection device for a calciner is provided, which includes a tank body. An electrostatic dust removal device is arranged inside the tank body. A heat exchanger is arranged below the electrostatic dust removal device. The heat exchanger is provided with a first waste heat pipeline and a second waste heat pipeline. The heat exchanger is connected with a reflux cooling liquid storage tank. An evaporation kettle is arranged on one side of the reflux cooling liquid storage tank. A bag dust removal device is arranged inside the tank body.

[0006] According to the waste heat collection device for a calciner, the heat exchanger is divided into two parts. An inlet valve is arranged at the upper end. Two groups of heat transfer tubes are arranged inside the heat exchanger. An outlet valve is arranged at the lower end of the heat exchanger.

[0007] According to the waste heat collection device for a calciner, a first filter is arranged at the reflux place of the first waste heat pipeline. The first filter is arranged at the lower end of the reflux cooling liquid storage tank.

[0008] According to the waste heat collection device for a calciner, a circulation pump is arranged on the second waste heat pipeline. The second waste heat pipeline is connected with the evaporation kettle. A reflux pipe is arranged at the lower end of the evaporation kettle. A second filter is arranged on the reflux pipe. The reflux pipe is connected with the reflux cooling liquid storage tank.

[0009] According to the waste heat collection device for a calciner, a thermal separation chamber is arranged inside the evaporation kettle. A condenser is arranged at the upper end of the thermal separation chamber. A condensate water collector is arranged on the side wall of the thermal separation chamber.

[0010] According to the waste heat collection device for a calciner, a regulating valve is arranged on the pipeline below the electrostatic dust removal device.

[0011] According to the described waste heat collection device for a calciner, an automatic dust cleaning system is provided at the lower end of the bag dust collector.

[0012] According to the described waste heat collection device for a calciner, a base is fixed at the bottom of the tank body, a discharge port is provided on the side wall of the tank body corresponding to the evaporation kettle, and a feed port and a smoke exhaust pipe are provided at the top of the tank body.

[0013] Beneficial effects:

[0014] 1. The first waste heat pipe and the second waste heat pipe are respectively responsible for conveying heat to the calciner and the evaporation kettle. Through the action of the circulation pump and the return pipe, a circulation system is formed, enabling the heat to be recycled in the system, thereby improving the energy utilization efficiency.

[0015] 2. The heat exchanger is divided into two parts, and the flue is provided with an inlet gate and an outlet gate, which can flexibly adjust the amount of flue gas entering the two parts of the heat exchanger, distribute heat according to the actual requirements of the calciner and the evaporation kettle, ensure the maximum utilization of heat, and reduce waste.

[0016] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0017] The following further illustrates the present utility model in conjunction with the drawings and embodiments;

[0018] Figure 1 It is a cross-sectional view of a waste heat collection device for a calciner proposed by the present utility model;

[0019] Figure 2 It is a three-dimensional view of a waste heat collection device for a calciner proposed by the present utility model;

[0020] Figure 3 It is a structural schematic diagram of a heat exchanger of a waste heat collection device for a calciner proposed by the present utility model;

[0021] Figure 4 It is a structural schematic diagram of an evaporation kettle of a waste heat collection device for a calciner proposed by the present utility model.

[0022] Legend Explanation:

[0023] 1. Tank body; 2. Base; 3. Discharge port; 4. Feed port; 5. Smoke exhaust pipe; 6. Electrostatic dust removal device; 7. Return cooling liquid storage tank; 8. Evaporation kettle; 9. Control valve; 10. First filter; 11. Heat exchanger; 12. First waste heat pipe; 13. Second waste heat pipe; 14. Return pipe; 15. Circulation pump; 16. Second filter; 17. Automatic ash cleaning system; 18. Bag dust removal device; 19. Heat transfer pipe; 20. Inlet gate; 21. Outlet gate; 22. Thermal separation chamber; 23. Condenser; 24. Condensate collector. Detailed implementation manners

[0024] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be construed as a limitation on the protection scope of the present invention.

[0025] Refer to Figures 1-4 , an apparatus for collecting waste heat from a calciner according to an embodiment of the present invention includes a tank body 1, an electrostatic dust removal device 6 is provided inside the tank body 1, a heat exchanger 11 is provided below the electrostatic dust removal device 6, the heat exchanger 11 is provided with a first waste heat pipe 12 and a second waste heat pipe 13, the heat exchanger 11 is connected to a return cooling liquid storage tank 7, an evaporation kettle 8 is provided on one side of the return cooling liquid storage tank 7, and a bag dust removal device 18 is provided inside the tank body 1.

[0026] The heat exchanger 11 is divided into two parts. An inlet gate 20 is provided at the upper end, and the inlet gate 20 flexibly adjusts the heat distribution. Two groups of heat transfer pipes 19 are provided inside the heat exchanger 11. An outlet gate 21 is provided at the lower end of the heat exchanger 11, and the outlet gate 21 prevents the flue gas from flowing back to the other part of the heat exchanger 11.

[0027] A first filter 10 is provided at the return of the first waste heat pipe 12. The first filter 10 effectively removes impurities in the medium and protects the equipment. The first filter 10 is provided at the lower end of the return cooling liquid storage tank 7.

[0028] A circulation pump 15 is provided on the second waste heat pipe 13. The second waste heat pipe 13 is connected to the evaporation kettle 8. A return pipe 14 is provided at the lower end of the evaporation kettle 8. A second filter 16 is provided on the return pipe 14, and the return pipe 14 is connected to the return cooling liquid storage tank 7.

[0029] A thermal separation chamber 22 is provided inside the evaporation kettle 8. A condenser 23 is provided at the upper end of the thermal separation chamber 22. The condenser 23 is used to condense the steam generated by evaporation and convert it into a liquid for subsequent treatment or recycling. A condensate collector 24 is provided on the side wall of the thermal separation chamber 22. The condensate collector 24 collects the alkali liquid or condensate after evaporation to ensure that it does not leak or pollute the environment.

[0030] A regulating valve 9 is provided in the pipeline below the electrostatic precipitator 6. The electrostatic precipitator 6 uses the electrostatic principle to adsorb particulate matters such as dust and soot in the flue gas on the dust collecting plate, thereby purifying the flue gas. The regulating valve 9 automatically adjusts the flue gas flow rate to ensure that the heat exchanger 11 operates under the best working conditions.

[0031] An automatic ash cleaning system 17 is provided at the lower end of the bag filter 18. The bag filter 18 performs secondary purification on the flue gas to meet the environmental protection requirements. The automatic ash cleaning system 17 cleans dust and other wastes to prevent blockage.

[0032] A base 2 is fixed at the bottom of the tank body 1. A discharge port 3 is provided on the side wall of the tank body 1 corresponding to the evaporation kettle 8. A feed port 4 and a smoke exhaust pipe 5 are provided at the top of the tank body 1.

[0033] Working principle: High-temperature flue gas enters the tank body 1 through the pipeline and reaches the electrostatic precipitator 6. After the flue gas is purified, the regulating valve 9 automatically adjusts the flue gas volume and enters the heat exchanger 11. The heat exchanger 11 is divided into two parts, and two groups of heat transfer pipes 19 are arranged inside. An inlet gate 20 is provided in the upper flue, and an outlet gate 21 is provided at the flue outlet. The input pipeline of the heat exchanger 11 is connected to the reflux cooling liquid storage tank 7. The first waste heat pipeline 12 is transported to the calciner. A first filter 10 is provided at the reflux part of the first waste heat pipeline 12. The first filter 10 is arranged in the reflux cooling liquid storage tank 7. The second waste heat pipeline 13 is connected to the evaporation kettle 8. A circulation pump 15 is provided on the second waste heat pipeline 13. One end of the return pipe 14 is connected to the evaporation kettle 8 and the other end is connected to the reflux cooling liquid storage tank 7. A second filter 16 is provided on the return pipe 14. The heat exchange amount between the two parts of the heat exchanger 11 can be adjusted according to the requirements of the conveying end to ensure that heat is not wasted. A heat separation chamber 22 is arranged inside the evaporation kettle 8. A condenser 23 is arranged above the heat separation chamber 22 to condense the evaporated steam. A condensate collector 24 is arranged on the side wall of the heat separation chamber 22. The flue gas passes through the heat exchanger 11 and then leads to the bag filter 18, and is discharged from the smoke exhaust pipe 5 above the tank body 1 after secondary purification. An automatic ash cleaning system 17 is provided at the lower end of the bag filter 18 to clean the wastes purified by the bag filter 18. A base 2 is arranged at the bottom of the tank body 1. A discharge port 3 is provided on the side wall of the tank body 1 corresponding to the evaporation kettle 8, and a feed port 4 is provided at the upper end.

[0034] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the technical field, various changes can also be made without departing from the gist of the present invention.

Claims

1. A calcining furnace waste heat collection device, comprising a tank body (1), characterized in that: An electrostatic precipitator (6) is arranged inside the tank body (1), a heat exchanger (11) is arranged below the electrostatic precipitator (6), the heat exchanger (11) is provided with a first waste heat pipe (12) and a second waste heat pipe (13), the heat exchanger (11) is connected to a reflux cooling liquid storage tank (7), an evaporator (8) is arranged on one side of the reflux cooling liquid storage tank (7), and a bag dust removal device (18) is arranged inside the tank body (1).

2. A calcining furnace waste heat collection device according to claim 1, characterized in that: The heat exchanger (11) is divided into two parts, and an inlet gate (20) is arranged at the upper end. Two groups of heat transfer tubes (19) are arranged inside the heat exchanger (11), and an outlet gate (21) is arranged at the lower end of the heat exchanger (11).

3. The calcining furnace waste heat collection device according to claim 1, characterized in that: A first filter (10) is provided at the reflux point of the first waste heat pipe (12), and the first filter (10) is arranged at the lower end of the reflux cooling liquid storage tank (7).

4. The calcining furnace waste heat collection device according to claim 1, characterized in that: The second waste heat pipe (13) is provided with a circulation pump (15), the second waste heat pipe (13) is connected to an evaporating kettle (8), a reflux pipe (14) is provided at the lower end of the evaporating kettle (8), the reflux pipe (14) is provided with a second filter (16), and the reflux pipe (14) is connected to a reflux cooling liquid storage tank (7).

5. The calcining furnace waste heat collection device according to claim 1, characterized in that: A heat separation chamber (22) is arranged inside the evaporation kettle (8), a condenser (23) is arranged at the upper end of the heat separation chamber (22), and a condensed water collector (24) is arranged on the side wall of the heat separation chamber (22).

6. The calcining furnace waste heat collection device according to claim 1, characterized in that: A regulating valve (9) is provided in the pipeline below the electrostatic dust removal device (6).

7. The calcining furnace waste heat collection device according to claim 1, characterized in that: An automatic dust cleaning system (17) is provided at the lower end of the bag dust removal device (18).

8. The calcining furnace waste heat collection device according to claim 1, characterized in that: A base (2) is fixed at the bottom of the tank body (1), a discharge port (3) is arranged on the side wall of the tank body (1) corresponding to the evaporator (8), and a feed port (4) and a smoke exhaust pipe (5) are arranged at the top of the tank body (1).

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