CN218154402U - Device for synthesizing low-temperature heat recovery for heating and refrigeration - Google Patents
Device for synthesizing low-temperature heat recovery for heating and refrigeration Download PDFInfo
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- CN218154402U CN218154402U CN202220604377.8U CN202220604377U CN218154402U CN 218154402 U CN218154402 U CN 218154402U CN 202220604377 U CN202220604377 U CN 202220604377U CN 218154402 U CN218154402 U CN 218154402U
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Abstract
The utility model discloses a device for heating and refrigerating by recycling synthetic low-temperature heat, which comprises a two-section heat pipe exchanger, wherein the exhaust end of a waste heat boiler is connected with the air inlet end of the two-section heat pipe exchanger through a pipeline, and the air inlet end of the waste heat boiler is communicated with the exhaust end of a reactor; the exhaust end of the two-section heat pipe exchanger is communicated with a heating heat exchanger through a pipeline, and the exhaust end of the heating heat exchanger is connected with the air inlet end of a cooler through a pipeline; the two-section heat pipe heat exchanger is also provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively communicated with the water inlet and the water outlet on one side of the hot water type absorption refrigerator, and the water inlet and the water outlet on the other side of the hot water type absorption refrigerator are communicated with the water inlet and the water outlet of the cooler. The process can meet the requirements of heating and refrigerating of factories, reduce carbon emission, reduce energy consumption in the production process and improve energy utilization efficiency.
Description
Technical Field
The utility model belongs to the technical field of the chemical industry process is energy-conserving, a synthetic low temperature heat recovery is used for heating and cryogenic device is related to.
Background
High-grade waste heat in the chemical industry is generally recycled by a boiler to prepare steam, and low-temperature heat energy below 200 ℃ has low grade and is difficult to utilize; the treatment is generally carried out by preheating desalted water or cooling by circulating water. The total amount of waste heat from such industries is enormous, and direct discharge of waste heat not only results in a huge waste of energy, but also results in increased use of energy and carbon emissions. The waste heat resources in the chemical industry of China are mainly concentrated on low-temperature heat energy, and the recovery rate of the waste heat resources is less than 50%. The heat sources are typical in methanation reaction, methanol synthesis reaction and ammonia synthesis reaction in the chemical process, and the final cooling of the synthesis gas adopts circulating water for cooling.
The prior art has the following technical defects:
the manufacturing process in the prior art only meets the requirements of the production process, most of process gases after methanation, methanol synthesis and ammonia synthesis are cooled by air cooling or water cooling, and low-temperature heat energy after reaction is not recycled, so that a great deal of energy is wasted.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a synthetic low temperature heat is retrieved and is used for heating and cryogenic device, has solved the problem that the manufacturing process that exists does not effectively utilize low temperature heat among the prior art.
The technical scheme adopted by the utility model is that the device for heating and refrigerating by synthesizing low-temperature heat recovery comprises a two-section heat pipe exchanger, wherein the exhaust end of a waste heat boiler is connected with the air inlet end of the two-section heat pipe exchanger through a pipeline, and the air inlet end of the waste heat boiler is communicated with the exhaust end of a reactor; the exhaust end of the two-section heat pipe heat exchanger is communicated with the heating heat exchanger through a pipeline, and the exhaust end of the heating heat exchanger is connected with the air inlet end of the cooler through a pipeline; the two-section heat pipe exchanger is also provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively communicated with the water inlet and the water outlet at one side of the hot water type absorption refrigerator, and the water inlet and the water outlet at the other side of the hot water type absorption refrigerator are communicated with the water inlet and the water outlet of the cooler.
Furthermore, the heating heat exchanger is also provided with a water inlet and a water outlet, the water inlet and the water outlet are communicated with the water inlet and the water outlet on one side of the heating heat exchange station, and the water inlet and the water outlet on the other side of the heating heat exchange station are connected to a heat user.
Furthermore, the heating heat exchange station is also provided with a low-pressure steam supplement inlet.
The utility model has the advantages that:
the device for heating and refrigerating by synthesizing low-temperature heat recovery of the utility model has convenient implementation, simple flow and wide application range, and can be suitable for low-temperature heat recovery after chemical reaction processes such as methanation reaction, methanol synthesis, ammonia synthesis and the like; the process can meet the requirements of heating and refrigerating in factories, reduce carbon emission, reduce energy consumption in the production process and improve the energy utilization efficiency.
Drawings
FIG. 1 is a process flow diagram of the apparatus for synthesizing low temperature heat recovery for heating and refrigeration of the present invention;
in the figure, 1, a two-section heat pipe exchanger, 2, a hot water type absorption refrigerator, 3, a heating heat exchanger, 4, a heating heat exchange station, 5, a cooler, 6, a heat consumer, 7, a reactor and 8, a waste heat boiler.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the device for heating and cooling by recycling synthetic low-temperature heat is characterized by comprising a two-section heat pipe heat exchanger 1, wherein the exhaust end of a waste heat boiler 8 is connected with the air inlet end of the two-section heat pipe heat exchanger 1 through a pipeline, and the air inlet end of the waste heat boiler 8 is communicated with the exhaust end of a reactor 7; the exhaust end of the two-section heat pipe exchanger 1 is communicated with the heating heat exchanger 3 through a pipeline, and the exhaust end of the heating heat exchanger 3 is connected with the air inlet end of the cooler 5 through a pipeline; the two-section heat pipe heat exchanger 1 is also provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively communicated with the water inlet and the water outlet on one side of the hot water type absorption refrigerator 2, and the water inlet and the water outlet on the other side of the hot water type absorption refrigerator 2 are communicated with the water inlet and the water outlet of the cooler 5.
The heating heat exchanger 3 is also provided with a water inlet and a water outlet which are communicated with the water inlet and the water outlet at one side of the heating heat exchange station 4, and the water inlet and the water outlet at the other side of the heating heat exchange station 4 are connected to the heat consumer 6.
The heating heat exchange station 4 is also provided with a low-pressure steam supplement port.
Adopt this device to be used for heating and refrigerated device for low temperature heat recovery after methanation reaction, methyl alcohol synthesis, ammonia synthesis chemical reaction process, including the following step:
and 5, the heating heat exchange station 4 is also provided with low-pressure steam supplement. The device is used for supplementing heat when the reactor is stopped or the heat is insufficient, and does not influence the heating of downstream users.
The synthesis gas comprises coal gasification process gas, coke oven gas and semi coke tail gas.
And (3) after heat exchange is carried out by the heating heat exchanger 3 in the step 3, the temperature of the synthetic gas is reduced to 65 ℃. The temperature of the cooling water was 13 ℃. And 4, the heating effluent after heat extraction in the step 4 is 75 ℃.
The utility model discloses a working process does:
synthetic gas such as methanation reaction, methanol synthesis, ammonia synthesis and the like comes out of the reactor 7 and then enters the waste heat boiler 8, synthetic gas at about 200 ℃ coming out of the waste heat boiler 8 enters the two-section heat pipe exchanger 1, synthetic gas at about 100 ℃ coming out of the two-section heat pipe exchanger 1 enters the heating heat exchanger 3, the temperature of the synthetic gas after heat exchange is about 65 ℃, the synthetic gas enters the cooler 5, and the synthetic gas cooled to 18 ℃ by the cooler 5 is sent to the subsequent working section for treatment;
the hot water with the temperature of 80 ℃ from the hot water type absorption refrigerator 2 enters the two-section heat pipe heat exchanger 1 for heat exchange, the hot water with the temperature of 90 ℃ after heat exchange returns to the hot water type absorption refrigerator 2 for preparing the chilled water with the temperature of 13 ℃, the chilled water enters the cooler 5 for providing cold energy, and the water with the temperature of 18 ℃ after the synthesis gas is cooled returns to the hot water type absorption refrigerator 2 for heat exchange and recycling;
heating water of about 50 ℃ from the heating heat exchange station 4 enters the heating heat exchanger 3, the temperature of the heating water after heat exchange is about 75 ℃ and returns to the heating heat exchange station 4, hot water from the heating heat exchange station 4 is used for heating of a heat user 6, the heating hot water is returned for recycling at 50 ℃, and low-pressure steam is used for heat supplement when the heat is insufficient due to the change of heat load of the heat user 6.
The utility model has the advantages that:
the device for heating and refrigerating by synthesizing low-temperature heat recovery of the utility model has convenient implementation, simple flow and wide application range, and can be suitable for low-temperature heat recovery after chemical reaction processes such as methanation reaction, methanol synthesis, ammonia synthesis and the like; the process can meet the requirements of heating and refrigerating in factories, reduce carbon emission, reduce energy consumption in the production process and improve the energy utilization efficiency.
Claims (3)
1. The device for heating and refrigerating by recycling synthetic low-temperature heat is characterized by comprising a two-section heat pipe heat exchanger (1), wherein the exhaust end of a waste heat boiler (8) is connected with the air inlet end of the two-section heat pipe heat exchanger (1) through a pipeline, and the air inlet end of the waste heat boiler (8) is communicated with the exhaust end of a reactor (7); the exhaust end of the two-section heat pipe heat exchanger (1) is communicated with the heating heat exchanger (3) through a pipeline, and the exhaust end of the heating heat exchanger (3) is connected with the air inlet end of the cooler (5) through a pipeline; the two-section heat pipe heat exchanger (1) is also provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively communicated with the water inlet and the water outlet at one side of the hot water type absorption refrigerator (2), and the water inlet and the water outlet at the other side of the hot water type absorption refrigerator (2) are communicated with the water inlet and the water outlet of the cooler (5).
2. The apparatus for heating and cooling by synthetic low temperature heat recovery according to claim 1, wherein the heating heat exchanger (3) is further provided with a water inlet and a water outlet which are communicated with the water inlet and the water outlet of one side of the heating heat exchange station (4), and the water inlet and the water outlet of the other side of the heating heat exchange station (4) are connected to the heat consumer (6).
3. A plant for heating and cooling with combined low temperature heat recovery according to claim 2, characterized in that the heating and heat exchange station (4) is also provided with a low pressure steam supplementary inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220604377.8U CN218154402U (en) | 2022-03-21 | 2022-03-21 | Device for synthesizing low-temperature heat recovery for heating and refrigeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220604377.8U CN218154402U (en) | 2022-03-21 | 2022-03-21 | Device for synthesizing low-temperature heat recovery for heating and refrigeration |
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| Publication Number | Publication Date |
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| CN218154402U true CN218154402U (en) | 2022-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220604377.8U Active CN218154402U (en) | 2022-03-21 | 2022-03-21 | Device for synthesizing low-temperature heat recovery for heating and refrigeration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114738815A (en) * | 2022-03-21 | 2022-07-12 | 西安陕鼓动力股份有限公司 | Device and method for heating and refrigerating by synthesizing low-temperature heat recovery |
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2022
- 2022-03-21 CN CN202220604377.8U patent/CN218154402U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114738815A (en) * | 2022-03-21 | 2022-07-12 | 西安陕鼓动力股份有限公司 | Device and method for heating and refrigerating by synthesizing low-temperature heat recovery |
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