CN218380521U

CN218380521U - Kiln tail gas waste heat utilization system

Info

Publication number: CN218380521U
Application number: CN202222238007.XU
Authority: CN
Inventors: 唐志强; 李旭; 冀胜利; 戴元燊; 李思泽; 刘广龙
Original assignee: BASF Shanshan Battery Materials Co Ltd
Current assignee: BASF Shanshan Battery Materials Co Ltd
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2023-01-24
Anticipated expiration: 2032-08-24

Abstract

The utility model discloses a kiln tail gas waste heat utilization system, including air supplement unit, tail gas collection device and heat exchanger, air supplement unit and tail gas collection device are connected with the kiln, the heat exchanger includes low temperature pipeline and to the thermal high temperature pipeline of low temperature pipeline transmission, collecting pipe and tail gas collection device intercommunication are passed through to high temperature pipeline's entry, the export of high temperature pipeline is passed through the collector tube and is connected with tail gas recovery unit, be equipped with the fan on the collector tube, the intercommunication has the circulating pipe between the water inlet of low temperature pipeline and the delivery port of low temperature pipeline, the water inlet by low temperature pipeline on the circulating pipe communicates in proper order to the delivery port of low temperature pipeline has waste heat utilization equipment, moisturizing level pressure device and water pump. The utility model discloses enable the heat exchanger and effectively and carry out heat transfer work steadily to reduce the tail gas temperature, also can guarantee simultaneously that waste heat utilization equipment carries out rational utilization with the waste heat, entire system structure is succinct, moves stably, and waste heat utilization is high.

Description

Kiln tail gas waste heat utilization system

Technical Field

The utility model relates to an industry heat recovery technical field, concretely relates to kiln tail gas waste heat utilization system.

Background

In the process flow needing high-temperature sintering operation, tail gas generated in the kiln has high heat, and the part of heat is often required to be recovered in order to avoid energy waste and cost-based consideration; in the prior art, the waste heat of the kiln is generally used for making hot water for producing domestic water, but the scheme has the following defects: (1) Because the heat contained in the kiln tail gas is large, the hot water obtained by utilizing the waste heat has high temperature and large volume, cannot be completely consumed in production and life, is unbalanced in supply and demand, and can possibly cause energy consumption loss; (2) Even if the waste heat utilization link of preparing hot water is passed, the temperature of the kiln tail gas is still high and cannot be reduced to normal temperature, so that the cost of the subsequent tail gas recovery and treatment process is increased.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome the not enough of prior art existence, provide a kiln tail gas waste heat utilization system, waste heat utilization's structure is succinct, and investment cost is low, and waste heat utilization efficiency is high.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a kiln tail gas waste heat utilization system, includes air supplement unit, tail gas collection device and heat exchanger, air supplement unit and tail gas collection device are connected with the kiln, the heat exchanger includes low temperature pipeline and to the thermal high temperature pipeline of low temperature pipeline transmission, collecting pipe and tail gas collection device intercommunication are passed through to high temperature pipeline's entry, the export of high temperature pipeline is passed through the collector tube and is connected with tail gas recovery unit, be equipped with the fan on the collector tube, the intercommunication has the circulating pipe between the water inlet of low temperature pipeline and the delivery port of low temperature pipeline, it has waste heat utilization device, moisturizing level pressure device and water pump to communicate in proper order by the water inlet of low temperature pipeline to the delivery port of low temperature pipeline on the circulating pipe.

Further, the water supplementing constant pressure device is an expansion water tank.

Furthermore, at least one thermometer is arranged on the collecting pipe and the circulating pipe which are close to the heat exchanger.

Furthermore, a regulating valve is arranged on the circulating pipe close to the water outlet of the low-temperature pipeline.

Furthermore, a safety pipe is communicated with the circulating pipe close to the heat exchanger, and a safety valve is arranged on the safety pipe.

Furthermore, a gas analyzer is arranged on the recovery pipe close to the air outlet of the fan.

Furthermore, a control valve is arranged on the recovery pipe, an exhaust pipe used for exhausting tail gas in the recovery pipe is communicated with the recovery pipe between the control valve and the fan, and an exhaust valve is arranged on the exhaust pipe.

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

the utility model discloses a circulating pipe that is equipped with water pump, moisturizing level pressure device enables the heat exchanger and effectively and carry out heat transfer work steadily to reduce the tail gas temperature, also can guarantee simultaneously that the waste heat utilization device carries out rational utilization with the waste heat, entire system structure is succinct, and the operation is stable, and waste heat utilization rate is high, easy maintenance, and equipment investment cost and maintenance cost are low.

Drawings

Fig. 1 is a schematic structural diagram of a kiln tail gas waste heat utilization system.

Illustration of the drawings:

1. a gas supplementing device; 2. a tail gas collecting device; 21. a collection pipe; 3. a heat exchanger; 31. a circulation pipe; 32. a water pump; 33. a water supplementing constant pressure device; 4. a kiln; 5. a tail gas recovery device; 51. a recovery pipe; 52. a fan; 53. a control valve; 54. an exhaust pipe; 55. an exhaust valve; 6. a waste heat utilization device; 71. a thermometer; 72. adjusting a valve; 73. a safety tube; 74. a safety valve; 8. a gas analyzer.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments.

As shown in fig. 1, the kiln tail gas waste heat utilization system of this embodiment, including air supplement unit 1, tail gas collection device 2 and heat exchanger 3, air supplement unit 1 and tail gas collection device 2 are connected with kiln 4, heat exchanger 3 includes low temperature pipeline and the high temperature pipeline to low temperature pipeline heat transfer, the entry of high temperature pipeline passes through collecting pipe 21 and communicates with tail gas collection device 2, the export of high temperature pipeline is passed through recovery tube 51 and is connected with tail gas recovery unit 5, be equipped with fan 52 on the recovery tube 51, the intercommunication has circulating pipe 31 between the water inlet of low temperature pipeline and the delivery port of low temperature pipeline, the last water inlet by low temperature pipeline of circulating pipe 31 to the delivery port of low temperature pipeline communicate in proper order has waste heat utilization device 6, moisturizing level pressure equipment 33 and water pump 32. Through the circulating pipe 31 that is equipped with water pump 32, moisturizing level pressure device 33, enable heat exchanger 3 and effectively and carry out heat transfer work steadily to reduce the tail gas temperature, also can guarantee simultaneously that waste heat utilization equipment 6 carries out rational utilization with the waste heat, entire system structure is succinct, and the operation is stable, and waste heat utilization rate is high, easy maintenance, and equipment investment cost and maintenance cost are low.

In this embodiment, the water-replenishing constant-pressure device 33 is an expansion tank. The expansion tank can accommodate the expansion amount of water in the circulating pipe 31, and simultaneously has the functions of pressure fixation and water replenishing for the system.

In this embodiment, at least one thermometer 71 is provided on both the collecting pipe 21 and the circulating pipe 31 adjacent to the heat exchanger 3. The temperature of each position on the collecting pipe 21 and the circulating pipe 31 can be known timely and accurately through the thermometer 71, so that abnormal conditions are prevented, and corresponding measures can be taken timely.

In this embodiment, the circulation pipe 31 near the water outlet of the low temperature pipe is provided with a regulating valve 72. The flow rate and flow velocity of the water in the circulation pipe 31 can be conveniently controlled as desired by the regulating valve 72.

In this embodiment, a safety pipe 73 is communicated with the circulation pipe 31 near the heat exchanger 3, and a safety valve 74 is provided on the safety pipe 73. The pipe explosion due to the excessive high pressure of the water temperature in the heat exchanger 3 can be effectively prevented by the relief valve 74.

In this embodiment, a gas analyzer 8 is disposed on the recovery pipe 51 near the outlet of the blower 52. The gas analyzer 8 can conveniently obtain the content of the gas components at the gas outlet of the fan 52, so that whether the oxygen purity is low or not can be conveniently searched, and the oxygen purity is low, so that the deoxidized gas recovery value is low.

In this embodiment, a control valve 53 is provided on the recovery pipe 51, an exhaust pipe 54 for exhausting the exhaust gas in the recovery pipe 51 is communicated with the recovery pipe 51 between the control valve 53 and the fan 52, and an exhaust valve 55 is provided on the exhaust pipe 54. The gas analyzer 8 is used for detecting the content of the gas component and detecting the content of the gas component, if the content of the gas component meets the requirement, the control valve 53 is opened, the exhaust valve 55 is closed, the tail gas is guided into the tail gas recovery device 5, and if the content of the gas component does not meet the requirement, the control valve 53 is closed, the exhaust valve 55 is opened, and the tail gas is emptied.

The above description is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. For those skilled in the art, the modifications and changes obtained without departing from the technical idea of the present invention shall be considered as the protection scope of the present invention.

Claims

1. The utility model provides a kiln tail gas waste heat utilization system, its characterized in that, includes air supplement unit (1), tail gas collection device (2) and heat exchanger (3), air supplement unit (1) and tail gas collection device (2) are connected with kiln (4), heat exchanger (3) include the low temperature pipeline and to low temperature pipeline heat transfer's high temperature pipeline, collecting pipe (21) and tail gas collection device (2) intercommunication are passed through to the entry of high temperature pipeline, the export of high temperature pipeline is passed through recovery tube (51) and is connected with tail gas recovery unit (5), be equipped with fan (52) on recovery tube (51), the intercommunication has circulating pipe (31) between the water inlet of low temperature pipeline and the delivery port of low temperature pipeline, last intercommunication by the water inlet of low temperature pipeline to the delivery port of low temperature pipeline in proper order of circulating pipe (31) has waste heat utilization device (6), moisturizing level pressure device (33) and water pump (32).

2. The kiln tail gas waste heat utilization system as claimed in claim 1, wherein the water supplementing and pressure stabilizing device (33) is an expansion water tank.

3. The kiln tail gas waste heat utilization system according to claim 1, characterized in that at least one thermometer (71) is arranged on each of the collecting pipe (21) and the circulating pipe (31) close to the heat exchanger (3).

4. The kiln tail gas waste heat utilization system as claimed in claim 1, wherein a regulating valve (72) is arranged on a circulating pipe (31) close to a water outlet of the low-temperature pipeline.

5. The kiln tail gas waste heat utilization system as claimed in claim 1, wherein a safety pipe (73) is communicated with the circulating pipe (31) close to the heat exchanger (3), and a safety valve (74) is arranged on the safety pipe (73).

6. The kiln tail gas waste heat utilization system as claimed in any one of claims 1-5, characterized in that a gas analyzer (8) is arranged on the recovery pipe (51) close to the air outlet of the fan (52).

7. The kiln tail gas waste heat utilization system according to claim 6, characterized in that a control valve (53) is arranged on the recovery pipe (51), an exhaust pipe (54) used for exhausting tail gas in the recovery pipe (51) is communicated with the recovery pipe (51) between the control valve (53) and the fan (52), and an exhaust valve (55) is arranged on the exhaust pipe (54).