Sulfur waste heat recycling device

Abstract

The utility model relates to a sulfur waste heat recycling device which comprises a circulating tank, a circulating pump A, a circulating pump B, a sulfur furnace and a boiler water supplementing tank, a heating pipe is spirally arranged on the furnace wall of the sulfur furnace in a surrounding mode, a heat preservation layer is sleeved on the outer side of the heating pipe, and the top of the circulating tank is connected with a water supplementing pipeline. The bottom of the circulation tank is connected with a heating pipe, a boiler water supplementing tank, an eye washer water pipeline and a tap water heat tracing pipeline through a circulation pump A. The water outlet end of the heating pipe is connected with the top of the circulation tank through a water conveying pipeline, the bottom of the circulation tank is further connected with a circulation pump B, the circulation pump B is connected with the heating pipe, and the circulation tank, the circulation pump A, the heating pipe and the water conveying pipeline form a circulation pipeline. And the circulating tank, the circulating pump B, the heating pipe and the water conveying pipeline form a warming pipeline. Cooling water is heated through the circulating pipeline, hot water with a certain volume is stored in the circulating tank and then supplied, and the temperature stability of water is guaranteed.

Description

Technical Field

[0001] This utility model relates to a sulfur waste heat recovery device, belonging to the field of inorganic chemical technology. Background Technology

[0002] SO2 gas is an important raw material for the production of sodium sulfite. In existing technologies, SO2 gas is obtained by burning sulfur powder in a sulfur furnace. During operation, the furnace temperature is extremely high, typically between 1200 and 1450°C, and can reach up to 1500°C, resulting in significant external heat loss. The current mainstream method for utilizing waste heat from sulfur furnaces involves attaching the feed pipe to the furnace and using the waste heat from the furnace shell to heat boiler water, water in municipal water tracing pipelines, etc., while avoiding excessively high furnace wall temperatures or large temperature differences between the inside and outside of the furnace wall that could cause deformation. For example, Chinese patent document CN210004782U discloses a waste heat utilization device for sulfur furnaces. However, this device uses waste heat to heat cooling water, which is then directly supplied to the boiler or municipal water tracing pipelines. It lacks effective temperature control methods, cannot control the heating of the cooling water, and cannot guarantee the temperature stability of the heated cooling water, resulting in low waste heat utilization. Therefore, this utility model is proposed. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this utility model provides a sulfur waste heat recovery device that uses a circulating pipeline to heat cooling water. A certain volume of hot water is stored in the circulating tank before being supplied to ensure the stability of the water temperature. In addition, a separate heating pipeline is designed to effectively increase the water temperature when water consumption increases or when the weather is too cold, while ensuring the normal operation of the device.

[0004] The technical solution of this utility model is as follows:

[0005] A sulfur waste heat recovery device includes a circulating tank, a circulating pump A, a circulating pump B, a sulfur furnace, and a boiler feedwater tank. Heating pipes are spirally arranged around the furnace wall of the sulfur furnace, and an insulation layer is fitted around the outside of the heating pipes. A feedwater pipe is connected to the top of the circulating tank. The bottom of the circulating tank is connected to the heating pipes, the boiler feedwater tank, an eyewash station water pipe, and a tap water heating pipe via the circulating pump A. The outlet of the heating pipes is connected to the top of the circulating tank via a water supply pipe. The bottom of the circulating tank is also connected to the circulating pump B, which is connected to the heating pipes. The circulating tank, circulating pump A, heating pipes, and water supply pipe constitute a circulating pipeline, and the circulating tank, circulating pump B, heating pipes, and water supply pipe constitute a heating pipeline.

[0006] According to a preferred embodiment of the present invention, a temperature sensor is installed on the connecting pipe between the bottom of the circulation tank and circulation pumps A and B to monitor the outlet water temperature inside the circulation tank.

[0007] According to a preferred embodiment of this utility model, a solenoid valve A is installed on the connecting pipe between the circulating pump A and the circulating pump B and the heating pipe, a solenoid valve B is installed on the connecting pipe between the circulating pump A and the boiler feedwater tank, a manual valve A is installed on the water pipe for the eyewash station, and a manual valve B is installed on the tap water heating pipe.

[0008] According to a preferred embodiment of this invention, a shell-and-tube heat exchanger is installed on the water supply pipeline. The water supply pipeline is connected to the shell side of the shell-and-tube heat exchanger, and the tube side of the shell-and-tube heat exchanger is connected to a waste acid pipeline. The outlet pipeline of circulating pump A is connected to a spray absorption tower. Here, the aforementioned sulfur waste heat recovery device is combined with the bromine production process. Both the spray absorption tower and the waste acid pipeline are equipment used in the bromine production process. Bromine production adopts the acid air blowing method. The main process is to adjust the pH of seawater or underground brine with low bromine content to about 3 using hydrochloric acid or sulfuric acid, introduce chlorine gas to oxidize bromide ions into bromine molecules, and then blow the molecules out with air. The bromine molecules are then absorbed by sulfur dioxide and water in a spray absorption tower, transforming them into hydrobromic acid and increasing the bromine content to 30-100 g / L. The bromine product is then obtained through distillation and separation. The high-temperature waste acid generated after distillation is discharged through a waste acid pipeline. The waste acid in the pipeline is the product of distillation and is at a high temperature. It is added to the water supply pipeline through a shell-and-tube heat exchanger to further increase the temperature of the water in the circulation pipeline. The hot water in the circulation tank enters the spray absorption tower via circulation pump A, allowing the spray absorption tower to use hot water for the spray reaction, reducing the energy consumption ratio in the bromine production process and increasing the bromine extraction rate.

[0009] According to a preferred embodiment of the present invention, a solenoid valve C is installed on the connecting pipe between the circulating pump A and the spray absorption tower.

[0010] During use, the water supply pipe replenishes the circulating tank with water. After replenishment, the water supply pipe is closed, and the circulating pump A starts, driving the cooling water in the circulating tank into the heating pipe. The water is heated by the waste heat of the sulfur furnace. The heated water returns to the circulating tank through the water supply pipe. The temperature sensor monitors the outlet water temperature of the circulating tank. Once the set value is reached, the water supply pipe is reopened, and solenoid valves B and C, as well as manual valves A and B, are opened. The hot water in the circulating tank is pumped into the boiler feedwater tank, the spray absorption tower, the eyewash station water pipe, and the tap water heating pipe, respectively. At the same time, some of the water in the circulating tank is also pumped into the heating pipe for heating to compensate for the cooling caused by the water replenishment in the circulating tank.

[0011] If water consumption increases or the weather is too cold, the water temperature in the circulation tank will decrease. When it drops to the set threshold, circulation pump B will start, pumping water from the circulation tank into the heating element to increase the water volume and flow rate in the heating element, thereby raising the water temperature and ensuring normal water supply.

[0012] The beneficial effects of this utility model are as follows:

[0013] This utility model provides a sulfur waste heat recovery device, which uses a circulation pipeline to heat cooling water. A certain volume of hot water is stored in the circulation tank and then supplied to ensure the stability of the water temperature. In addition, a separate heating pipeline is designed to effectively increase the water temperature when the water consumption increases or the weather is too cold, while ensuring the normal operation of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] In the diagram: 1. Circulation tank, 2. Temperature sensor, 3. Circulation pump A, 4. Solenoid valve A, 5. Sulfur furnace, 6. Shell and tube heat exchanger, 7. Solenoid valve B, 8. Spray absorption tower, 9. Solenoid valve C, 10. Boiler water tank, 11. Manual valve A, 12. Manual valve B, 13. Circulation pump B, 14. Water supply pipeline, 15. Air vent valve, 16. Water delivery pipeline. Detailed Implementation

[0016] The present invention will be further described below with reference to the embodiments and accompanying drawings, but is not limited thereto.

[0017] Example 1:

[0018] like Figure 1 As shown, this utility model provides a sulfur waste heat recovery device, including a circulation tank 1, a circulation pump A3, a circulation pump B13, a sulfur furnace 5, and a boiler feedwater tank 10. The sulfur furnace 5 has a heating pipe spirally arranged around its wall, with an insulation layer fitted around the outside of the heating pipe. A feedwater pipe 14 is connected to the top of the circulation tank 1. The bottom of the circulation tank 1 is connected to the heating pipe, the boiler feedwater tank 10, an eyewash station water pipe, and a tap water heating pipe via the circulation pump A3. The boiler feedwater tank 10 is used for heating. The outlet of the heating pipe is connected to the top of the circulation tank 1 via a water supply pipe 16. The bottom of the circulation tank 1 is also connected to the circulation pump B13, which is connected to the heating pipe. The circulation tank 1, circulation pump A3, heating pipe, and water supply pipe constitute a circulation pipeline, and the circulation tank 1, circulation pump B13, heating pipe, and water supply pipe 16 constitute a heating pipeline.

[0019] Temperature sensor 2 is installed on the connecting pipe between the bottom of circulation tank 1 and circulation pumps A3 and B13 to monitor the outlet water temperature inside the circulation tank.

[0020] Solenoid valve A4 is installed on the connecting pipes of circulating pump A3 and circulating pump B13 to the heating pipe, solenoid valve B7 is installed on the connecting pipe of circulating pump A3 to boiler feedwater tank 10, manual valve A11 is installed on the water pipe of eyewash station, and manual valve B12 is installed on the tap water heating pipe.

[0021] A shell-and-tube heat exchanger 6 is installed on the water supply pipeline 16. The shell side of the shell-and-tube heat exchanger is connected to the water supply pipeline 16, and the tube side of the shell-and-tube heat exchanger is connected to the waste acid pipeline. The outlet pipeline of the circulating pump A3 is connected to the spray absorption tower 8. Here, the above-mentioned sulfur waste heat recovery device is combined with the bromine production process. Both the spray absorption tower and the waste acid pipeline are equipment used in the bromine production process. Bromine production adopts the acid air blowing method. The main process is to adjust the pH of seawater or underground brine with low bromine content to about 3 using hydrochloric acid or sulfuric acid, introduce chlorine gas to oxidize bromide ions into bromine molecules, and blow out the molecular bromine with air. Then, sulfur dioxide and water are used in the spray absorption tower to absorb bromine molecules, converting them into hydrobromic acid, increasing the bromine content to 30-100 g / L. Subsequently, bromine products are obtained through distillation and separation. The high-temperature waste acid generated after distillation is discharged through the waste acid pipeline. The waste acid in the waste acid pipeline is the product after distillation and has a high temperature. It is added to the water supply pipeline through a shell-and-tube heat exchanger, which can further increase the temperature of the water in the circulation pipeline. The hot water in the circulation tank enters the spray absorption tower through circulation pump A, so that the spray absorption tower uses hot water for spraying reaction, reducing the energy consumption ratio in the bromine production process and increasing the extraction rate of bromine production.

[0022] A solenoid valve C9 is installed on the connecting pipe between the circulating pump A3 and the spray absorption tower 8. An air vent valve 15 is installed on the water supply pipe 16 to facilitate the discharge of gas from the pipe.

[0023] During use, the water supply pipe replenishes the circulating tank with water. After replenishment, the water supply pipe is closed, and the circulating pump A starts, driving the cooling water in the circulating tank into the heating pipe. The water is heated by the waste heat of the sulfur furnace. The heated water returns to the circulating tank through the water supply pipe. The temperature sensor monitors the outlet water temperature of the circulating tank. Once the set value is reached, the water supply pipe is reopened, and solenoid valves B and C, as well as manual valves A and B, are opened. The hot water in the circulating tank is pumped into the boiler feedwater tank, the spray absorption tower, the eyewash station water pipe, and the tap water heating pipe, respectively. At the same time, some of the water in the circulating tank is also pumped into the heating pipe for heating to compensate for the cooling caused by the water replenishment in the circulating tank.

[0024] If water consumption increases or the weather is too cold, the water temperature in the circulation tank will decrease. When it drops to the set threshold, circulation pump B will start, pumping water from the circulation tank into the heating element to increase the water volume and flow rate in the heating element, thereby raising the water temperature and ensuring normal water supply.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for recovering waste heat from sulfur, characterized in that, The system includes a circulating tank, circulating pump A, circulating pump B, a sulfur furnace, and a boiler feedwater tank. Heating pipes are spirally arranged around the furnace wall of the sulfur furnace, and an insulation layer is fitted around the outside of the heating pipes. A feedwater pipe is connected to the top of the circulating tank. The bottom of the circulating tank is connected to the heating pipes, the boiler feedwater tank, the eyewash station water pipe, and the tap water heating pipe via circulating pump A. The outlet of the heating pipes is connected to the top of the circulating tank via a water supply pipe. Circulating pump B is also connected to the bottom of the circulating tank, and circulating pump B is connected to the heating pipes. The circulating tank, circulating pump A, heating pipes, and water supply pipe constitute a circulating pipeline, and the circulating tank, circulating pump B, heating pipes, and water supply pipe constitute a heating pipeline.

2. The sulfur waste heat recovery device as described in claim 1, characterized in that, Temperature sensors are installed on the connecting pipes at the bottom of the circulation tank to circulation pumps A and B.

3. The sulfur waste heat recovery device as described in claim 2, characterized in that, Solenoid valve A is installed on the connecting pipes of circulating pump A and circulating pump B to the heating pipe; solenoid valve B is installed on the connecting pipe of circulating pump A to the boiler feedwater tank; manual valve A is installed on the water pipe of the eyewash station; and manual valve B is installed on the tap water heating pipe.

4. The sulfur waste heat recovery device as described in claim 3, characterized in that, A shell-and-tube heat exchanger is installed on the water supply pipeline. The water supply pipeline is connected to the shell side of the shell-and-tube heat exchanger, and the tube side of the shell-and-tube heat exchanger is connected to a waste acid pipeline. The outlet pipeline of circulating pump A is connected to a spray absorption tower.

5. The sulfur waste heat recovery device as described in claim 4, characterized in that, A solenoid valve C is installed on the connecting pipe between the circulating pump A and the spray absorption tower.

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