Heavy ash furnace gas waste heat utilization device
By designing a gas waste heat utilization device for heavy ash furnace, the furnace gas heat is recovered and the desalinated water is heated, the problem of heat recovery of heavy ash furnace gas is solved, efficient utilization is achieved, and energy consumption and environmental pollution are reduced.
Patent Information
- Application Number
- CN202420096842.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-16
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-01-16
AI Technical Summary
During the production process of Haitian Company's soda ash, the high-quality heat in the heavy ash furnace gas was not effectively recovered, resulting in energy waste and environmental pollution.
A heavy ash furnace gas waste heat utilization device is designed, including a calciner, heat exchanger, furnace gas scrubber, water washing bucket and temperature lifting bucket. The heat is recovered through the furnace gas scrubber, and the heat exchanger and temperature lifting bucket are used to collect heat. Desalination water increases the temperature, reduces steam consumption and wash water temperature, and improves heat exchange efficiency.
Effectively absorb the heat of the furnace gas, increase the temperature of desalination water, reduce steam consumption and washing water temperature, improve the heat exchange efficiency of washing water and furnace gas, realize the efficient utilization of waste heat resources, and reduce energy waste and environmental pollution.
Smart Images
Figure CN222279372U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of waste heat utilization devices, in particular to a heavy ash furnace gas waste heat utilization device. Background Art
[0002] In the soda ash production of Haitian Company, there are multiple exothermic reaction operation units, which will generate a large amount of low-grade heat energy. The recycling of waste heat is an effective way to save energy and reduce consumption. In the heavy ash process of the calcination workshop, a large amount of furnace gas is generated during the calcination of soda ash. Its main component is water vapor at 100°C, and the gas volume is about 4.5t / h per furnace. At present, there are 4 calcination furnaces in the heavy ash process, of which the heat of the gas from 2 ordinary heavy ash furnaces has been recovered for heating the distillation mother liquor. The heat of the other 2 high-quality heavy ash furnaces has not been recovered and is directly discharged, which not only wastes energy but also affects the environment.
[0003] The water used in the company's thermal power boilers needs to be heated. The water used in the high-pressure boiler deaerator mainly includes desalted water, slag cooler heating water, and heat exchange desalted water in the energy collector. The deaerator design temperature is 150°C, the water temperature in the current production stage requires 125°C, and the steam consumption of the deaerator is 30t / h. Therefore, the unrecovered heat generated by the high-quality heavy ash furnace is used to heat the high-pressure boiler deaerator, which not only reduces steam consumption, but also reduces energy waste. This is in line with the trend of energy conservation and emission reduction in the national soda ash industry and reduces energy waste and emissions. Utility Model Content
[0004] The utility model aims to solve the shortcomings in the prior art and proposes a heavy ash furnace gas waste heat utilization device.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a heavy ash furnace gas waste heat utilization device, including a calcining furnace, a heat exchanger, a furnace gas washing tower, a washing water bucket, a temperature raising bucket, and a furnace gas induced draft fan. A high-temperature furnace gas outlet is provided at the upper part of the calcining furnace, and the high-temperature furnace gas outlet of the calcining furnace is connected to the furnace gas inlet of the furnace gas washing tower.
[0006] As a further description of the above technical solution:
[0007] The top of the heat exchanger is provided with a furnace gas inlet, and the bottom is provided with a desalted water outlet. The upper part of the heat exchanger away from the furnace gas inlet is provided with a desalted water outlet, and the lower part is provided with a desalted water inlet.
[0008] As a further description of the above technical solution:
[0009] The gas outlet of the gas washing tower is connected to the gas inlet of the heat exchanger, the desalted water outlet of the heat exchanger is connected to the washing water bucket, and the desalted water outlet on the upper side of the heat exchanger away from the gas inlet is connected to the temperature raising bucket.
[0010] As a further description of the above technical solution:
[0011] The furnace gas outlet at the top of the furnace gas washing tower is connected to the furnace gas inlet of the furnace gas induced draft fan, and the furnace gas outlet is arranged on the side of the furnace gas induced draft fan away from the furnace gas washing tower.
[0012] The utility model has the following beneficial effects:
[0013] 1. In the utility model, the heat in the furnace gas can be effectively absorbed to increase the temperature of the desalted water and reduce the steam consumption. The temperature of the washing water can be reduced by raising the temperature of the desalted water, thereby improving the heat exchange efficiency of the washing water and the furnace gas and realizing the efficient utilization of the waste heat resources. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The present invention is a flow chart of a heavy ash furnace gas waste heat utilization device proposed by the present invention. DETAILED DESCRIPTION
[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0016] Reference Figure 1 The utility model provides an embodiment: a heavy ash furnace gas waste heat utilization device, including a calcining furnace, a heat exchanger, a furnace gas washing tower, a washing water bucket, a temperature raising bucket, and a furnace gas induced draft fan. A high-temperature furnace gas outlet is provided on the upper part of the calcining furnace, and the high-temperature furnace gas outlet of the calcining furnace is connected to the furnace gas inlet of the furnace gas washing tower, which can effectively absorb the heat in the furnace gas to increase the temperature of the desalted water and reduce the steam consumption. In addition, the washing water temperature can be reduced by raising the temperature of the desalted water, thereby improving the heat exchange efficiency of the washing water and the furnace gas, and realizing the efficient utilization of waste heat resources.
[0017] A furnace gas inlet is arranged at the top of the heat exchanger, and a desalted water outlet is arranged at the bottom. A desalted water outlet is arranged at the upper part of the side of the heat exchanger away from the furnace gas inlet, and a desalted water inlet is arranged at the lower part. The furnace gas outlet of the furnace gas washing tower is connected to the furnace gas inlet of the heat exchanger, and the desalted water outlet of the heat exchanger is connected to the washing water bucket. The desalted water outlet at the upper part of the side of the heat exchanger away from the furnace gas inlet is connected to the temperature raising bucket. The furnace gas outlet at the top of the furnace gas washing tower is connected to the furnace gas inlet of the furnace gas induced draft fan. A furnace gas outlet is arranged on the side of the furnace gas induced draft fan away from the furnace gas washing tower.
[0018] Working principle: After the high-quality heavy ash gas is washed by the gas washing tower to wash the alkali dust and recover the heat in the gas, it is discharged through the gas induced draft fan. After the washing water in the washing bucket is directly in contact with the gas in the gas washing tower, part of it enters the heat exchanger to heat the desalted water from the thermoelectric power and then returns to the washing water bucket, and part of it directly returns to the washing water bucket. The desalted water after heat exchange and heating enters the temperature raising barrel and uses steam to raise the temperature to meet the thermoelectric use needs before returning to the thermoelectric high-pressure deaerator.
[0019] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A device for utilizing waste heat from heavy ash furnace gas, comprising a calcining furnace, a heat exchanger, a furnace gas washing tower, a washing water bucket, a temperature raising bucket, and a furnace gas induced draft fan, characterized in that: A high-temperature gas outlet is provided at the upper portion of the calcining furnace, and the high-temperature gas outlet of the calcining furnace is connected to the gas inlet of the gas washing tower.
2. The device for utilizing waste heat from heavy ash furnace gas according to claim 1, characterized in that: The top of the heat exchanger is provided with a furnace gas inlet, and the bottom is provided with a desalted water outlet. The upper part of the heat exchanger away from the furnace gas inlet is provided with a desalted water outlet, and the lower part is provided with a desalted water inlet.
3. The device for utilizing waste heat from heavy ash furnace gas according to claim 1, characterized in that: The gas outlet of the gas washing tower is connected to the gas inlet of the heat exchanger, the desalted water outlet of the heat exchanger is connected to the washing water bucket, and the desalted water outlet on the upper side of the heat exchanger away from the gas inlet is connected to the temperature raising bucket.
4. The device for utilizing waste heat from heavy ash furnace gas according to claim 1, characterized in that: The furnace gas outlet at the top of the furnace gas washing tower is connected to the furnace gas inlet of the furnace gas induced draft fan, and the furnace gas outlet is arranged on the side of the furnace gas induced draft fan away from the furnace gas washing tower.