CN218821856U - Waste gas waste heat recovery system - Google Patents
Waste gas waste heat recovery system Download PDFInfo
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- CN218821856U CN218821856U CN202222907513.3U CN202222907513U CN218821856U CN 218821856 U CN218821856 U CN 218821856U CN 202222907513 U CN202222907513 U CN 202222907513U CN 218821856 U CN218821856 U CN 218821856U
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- inlet pipeline
- heat recovery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model relates to a waste gas waste heat recovery system, which comprises a heat exchange device, an air inlet pipeline, an air outlet pipeline, a water inlet pipeline and a water outlet pipeline, wherein the air inlet pipeline, the air outlet pipeline, the water inlet pipeline and the water outlet pipeline are connected with the heat exchange device; a waste gas bypass pipeline is arranged between the air inlet pipeline and the air outlet pipeline, electric control valves are arranged on the air inlet pipeline and the waste gas bypass pipeline, and the electric control valves arranged on the air inlet pipeline and the waste gas bypass pipeline are connected with a common pneumatic actuator; and temperature sensors are arranged on the water inlet pipeline and the water outlet pipeline, and the temperature sensors and the pneumatic actuator are connected with a PLC control cabinet. Compared with the prior art, the utility model discloses make executor quantity reduce, investment cost reduces, and makes two way control valve's regulation more possess the controllability behind the shared actuator, has guaranteed the security among the heat recovery process.
Description
Technical Field
The utility model relates to a waste heat recovery technical field, concretely relates to waste gas waste heat recovery system.
Background
In the automobile production process, in order to save production running cost, a waste gas waste heat recovery system can be adopted to exchange heat of high-temperature waste gas to lower temperature for emission, reduce the emission temperature of the waste gas and recycle the released heat. The waste gas waste heat recovery system usually comprises a wind side and a water side, the waste gas on the wind side heats the water on the water side through heat exchange, the temperature of the waste gas is reduced, the temperature of the water is increased, and the energy consumption required by heating the water is reduced.
In the waste gas waste heat recovery system, valve control is mainly distributed on two parts of a water side and a wind side, the wind side part is generally provided with an electric control valve and a manual control valve on an air inlet pipeline and an air outlet pipeline, a bypass pipe is additionally arranged between two air pipes for safety, and the electric control valve is correspondingly additionally arranged. The conventional installation method is that each electric valve is correspondingly provided with an actuator, so that the defects are that the initial investment cost is higher, and meanwhile, the control logic is obviously complicated and is not beneficial to the setting of the control logic of the whole system.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a waste gas waste heat recovery system reduces executor quantity.
The purpose of the utility model can be realized by the following technical proposal: a waste gas waste heat recovery system comprises a heat exchange device, and an air inlet pipeline, an air outlet pipeline, a water inlet pipeline and a water outlet pipeline which are connected with the heat exchange device, wherein waste gas to be cooled enters from the air inlet pipeline and is discharged from the air outlet pipeline after passing through the heat exchange device, and heated water enters from the water inlet pipeline and is discharged from the water outlet pipeline after passing through the heat exchange device;
a waste gas bypass pipeline is arranged between the air inlet pipeline and the air outlet pipeline, electric control valves are arranged on the air inlet pipeline and the waste gas bypass pipeline, and the electric control valves arranged on the air inlet pipeline and the waste gas bypass pipeline are connected with a common pneumatic actuator;
and temperature sensors are arranged on the water inlet pipeline and the water outlet pipeline, and the temperature sensors and the pneumatic actuator are connected with a PLC control cabinet.
Preferably, the air inlet pipeline is provided with a temperature sensor and a pressure sensor, and the temperature sensor and the pressure sensor are connected with a PLC control cabinet.
Preferably, a temperature sensor and a manual air valve are arranged on the air outlet pipeline, and the temperature sensor is connected with the PLC control cabinet.
Preferably, a water bypass pipeline is arranged between the water inlet pipeline and the water outlet pipeline, and butterfly valves are arranged on the water inlet pipeline, the water outlet pipeline and the water bypass pipeline.
Preferably, the water outlet pipeline is connected with the energy center, a circulating water pump, a flowmeter and a target type water flow switch are arranged on the water outlet pipeline between the heat exchange device and the energy center, the target type water flow switch is arranged between the circulating water pump and the flowmeter, and the circulating water pump is connected with the PLC control cabinet.
Further preferably, the inlet side of the energy center is connected with a water outlet pipeline, the outlet side of the energy center is connected with a hot water supply pipeline, and a hot water circulating pump is arranged on the hot water supply pipeline.
Preferably, the water inlet pipeline and the water outlet pipeline are provided with pressure sensors, and the pressure sensors are connected with the PLC control cabinet.
Preferably, a safety valve is arranged on the water outlet pipeline.
Preferably, the heat exchange device is a waste heat recoverer.
Preferably, the air inlet pipeline is connected with the RTO smoke pipe, and the water inlet pipeline is connected with the workshop water outlet device.
Compared with the prior art, the utility model has the advantages of it is following:
1. the waste heat recovery system structure of the utility model reduces the number of actuators and the investment cost, and after the actuators are shared, the adjustment of two paths of control valves is more controllable, thereby ensuring the safety in the heat recovery process;
2. the utility model discloses a temperature sensor and the PLC switch board on pneumatic actuator, water inlet pipe and the outlet pipeline cooperate to set up, can control the start and stop of electric control valve on air inlet pipe and the waste gas bypass pipeline according to the temperature of water side, discharge unnecessary waste gas bypass to the atmosphere, play the purpose of safety protection, prevent that the temperature is too high to gasify;
3. the utility model can monitor the state of each pipeline by the matching arrangement of the temperature sensor, the pressure sensor and the PLC control cabinet, thereby improving the safety and the stability of the system;
4. the utility model can flexibly adjust the water outlet flow according to the requirement through the arrangement of the circulating water pump, the flowmeter and the target type water flow switch between the heat exchange device and the energy center;
5. the utility model discloses electric control valve control logic is simple, is favorable to overall system control logic to set for.
Drawings
Fig. 1 is a schematic structural diagram of the waste gas waste heat recovery system of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
in the figure: the system comprises a gas inlet pipeline, a gas outlet pipeline, a 3 water inlet pipeline, a 4 water outlet pipeline, a 5 waste gas bypass pipeline, a 6 PLC control cabinet, a 7 water bypass pipeline, an 8 energy source center, a 9 hot water supply pipeline, a 10 waste heat recoverer, an a electric control valve, a b pneumatic actuator, a c manual air valve, a d-butterfly valve, an e-circulating water pump, an f-flowmeter, a g-target type water flow switch, an h-hot water circulating pump and an i-safety valve.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The following examples are carried out on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following examples.
Example 1
A waste gas waste heat recovery system is shown in figure 1 and comprises a heat exchange device, an air inlet pipeline 1, an air outlet pipeline 2, a water inlet pipeline 3, a water outlet pipeline 4, a waste gas bypass pipeline 5 and a PLC control cabinet 6, wherein the air inlet pipeline 1, the air outlet pipeline 2, the water inlet pipeline 3 and the water outlet pipeline 4 are connected with the heat exchange device, the air inlet pipeline 1 and the air outlet pipeline 2 are located on the wind side, the water inlet pipeline 3 and the water outlet pipeline 4 are located on the water side, waste gas to be cooled enters from the air inlet pipeline 1 and is discharged from the air outlet pipeline 2 after passing through the heat exchange device, heated water enters from the water inlet pipeline 3 and is discharged from the water outlet pipeline 4 after passing through the heat exchange device.
As shown in fig. 2, a waste gas bypass pipeline 5 is arranged between the air inlet pipeline 1 and the air outlet pipeline 2, electric control valves a are arranged on the air inlet pipeline 1 and the waste gas bypass pipeline 5, the electric control valves a arranged on the air inlet pipeline 1 and the waste gas bypass pipeline 5 are connected with a common pneumatic actuator b, temperature sensors are arranged on the water inlet pipeline 3 and the water outlet pipeline 4, and the temperature sensors and the pneumatic actuator b are connected with a PLC control cabinet 6.
In the embodiment, the electric control valves a on the air inlet pipeline 1 and the waste gas bypass pipeline 5 perform linkage control on the air inlet pipeline 1 and the waste gas bypass pipeline 5 through the shared pneumatic actuator b, the control logic is that when the temperature of the water side reaches a set temperature (measured through a temperature sensor), the pneumatic actuator b is started, the air inflow of waste gas is reduced by adjusting the opening through the electric control valve a on the air inlet pipeline 1, and meanwhile, the electric control valve a on the waste gas bypass pipeline 5 is opened to discharge the redundant waste gas bypass to the atmosphere, so that the purpose of safety protection is achieved, and the phenomenon that the water temperature is too high and gasified is prevented.
When the waste heat recovery system is used in a waste gas treatment station of a paint workshop of an automobile manufacturing plant, the air inlet pipeline and the bypass pipeline in the air side part of the waste heat recovery device are both additionally provided with an electric control valve, and share an actuator to control the air inflow. The operation logic is mainly that when the water side temperature reaches a set value, in order to prevent the water temperature from being excessively vaporized, the air inflow of the waste gas needs to be controlled, the actuators respectively give instructions to adjust the opening degrees of the two valves, and partial waste gas is discharged to the atmosphere through the bypass in the same proportion.
The waste heat recovery system structure of the embodiment reduces the number of the actuators, reduces the investment cost, enables the adjustment of the two control valves to be more controllable after the actuators are shared, and ensures the safety in the heat recovery process.
Example 2
A waste gas waste heat recovery system is characterized in that a heat exchange device is a waste heat recoverer 10, a temperature sensor and a pressure sensor are arranged on an air inlet pipeline 1, a temperature sensor and a manual air valve c are arranged on an air outlet pipeline 2, a water bypass pipeline 7 is arranged between a water inlet pipeline 3 and a water outlet pipeline 4, butterfly valves d are arranged on the water inlet pipeline 3, the water outlet pipeline 4 and the water bypass pipeline 4 respectively, a pressure sensor is arranged on the water inlet pipeline 3 and the water outlet pipeline 4, a safety valve i is arranged on the water outlet pipeline 4, the water outlet pipeline 4 is connected with an energy center 8, the energy center 8 can provide various energy sources such as cold, hot water, compressed air and the like, a circulating water pump e, a flow meter f and a target type water flow switch g are arranged on the water outlet pipeline 4 between the heat exchange device and the energy center 8, the target type water flow switch g is arranged between the circulating water pump e and the flow meter f, the inlet side of the energy center 8 is connected with the water outlet pipeline 4, the outlet side is connected with a hot water supply pipeline 9, and a hot water circulation pump h is arranged on the hot water supply pipeline 9. In this embodiment, the temperature sensor, the pressure sensor, the circulating water pump e, and the pneumatic actuator b are all connected to the PLC control cabinet 6.
In the embodiment, the system is a 90 ℃ hot water system for a paint process, the air inlet pipeline 1 is connected with an RTO smoke pipe, and the water inlet pipeline 3 is connected with a workshop water outlet device. 270 ℃ flue gas discharged by a paint workshop enters the waste heat recoverer 10 from the air inlet pipeline 1, is cooled to 130 ℃ through heat exchange and then is discharged from the air outlet pipeline 2, 70 ℃ process return water flowing out of the workshop enters from the water inlet pipeline 3, is heated to 90 ℃ through heat exchange and then is discharged from the water outlet pipeline 4, and is supplied to the paint workshop from the hot water supply pipeline 9 after passing through the energy center 8. The working principle of the waste heat recoverer 10 is as follows: the waste gas (270 ℃) is utilized to carry out total heat exchange with 70 ℃ hot water in a workshop to achieve the purposes of heating the hot water and recovering waste heat.
The embodiments described above are intended to facilitate a person skilled in the art in understanding and using the invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.
Claims (10)
1. A waste gas waste heat recovery system is characterized by comprising a heat exchange device, and an air inlet pipeline (1), an air outlet pipeline (2), a water inlet pipeline (3) and a water outlet pipeline (4) which are connected with the heat exchange device;
a waste gas bypass pipeline (5) is arranged between the air inlet pipeline (1) and the air outlet pipeline (2), electric control valves (a) are respectively arranged on the air inlet pipeline (1) and the waste gas bypass pipeline (5), and the electric control valves (a) arranged on the air inlet pipeline (1) and the waste gas bypass pipeline (5) are connected with a common pneumatic actuator (b);
temperature sensors are arranged on the water inlet pipeline (3) and the water outlet pipeline (4), and the temperature sensors and the pneumatic actuator (b) are connected with a PLC control cabinet (6).
2. The exhaust gas waste heat recovery system according to claim 1, wherein a temperature sensor and a pressure sensor are arranged on the air inlet pipeline (1), and the temperature sensor and the pressure sensor are connected with a PLC control cabinet (6).
3. The waste gas waste heat recovery system according to claim 1, wherein a temperature sensor and a manual air valve (c) are arranged on the air outlet pipeline (2), and the temperature sensor is connected with the PLC control cabinet (6).
4. The exhaust gas waste heat recovery system according to claim 1, wherein a water bypass pipeline (7) is arranged between the water inlet pipeline (3) and the water outlet pipeline (4), and butterfly valves (d) are arranged on the water inlet pipeline (3), the water outlet pipeline (4) and the water bypass pipeline (7).
5. The exhaust gas waste heat recovery system according to claim 1, wherein the water outlet pipeline (4) is connected with the energy center (8), a circulating water pump (e), a flowmeter (f) and a target type water flow switch (g) are arranged on the water outlet pipeline (4) between the heat exchange device and the energy center (8), the target type water flow switch (g) is arranged between the circulating water pump (e) and the flowmeter (f), and the circulating water pump (e) is connected with the PLC control cabinet (6).
6. The exhaust gas waste heat recovery system according to claim 5, wherein the inlet side of the energy center (8) is connected with the water outlet pipeline (4), the outlet side of the energy center is connected with the hot water supply pipeline (9), and the hot water supply pipeline (9) is provided with a hot water circulating pump (h).
7. The exhaust gas waste heat recovery system according to claim 1, wherein pressure sensors are arranged on the water inlet pipeline (3) and the water outlet pipeline (4), and the pressure sensors are connected with a PLC control cabinet (6).
8. The exhaust gas waste heat recovery system according to claim 1, characterized in that a safety valve (i) is arranged on the water outlet pipeline (4).
9. The exhaust gas waste heat recovery system according to claim 1, wherein the heat exchanging device is a waste heat recovery device (10).
10. The exhaust gas waste heat recovery system according to claim 1, wherein the air inlet pipeline (1) is connected with an RTO smoke pipe, and the water inlet pipeline (3) is connected with a workshop water outlet device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222907513.3U CN218821856U (en) | 2022-11-02 | 2022-11-02 | Waste gas waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222907513.3U CN218821856U (en) | 2022-11-02 | 2022-11-02 | Waste gas waste heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218821856U true CN218821856U (en) | 2023-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222907513.3U Active CN218821856U (en) | 2022-11-02 | 2022-11-02 | Waste gas waste heat recovery system |
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| Country | Link |
|---|---|
| CN (1) | CN218821856U (en) |
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2022
- 2022-11-02 CN CN202222907513.3U patent/CN218821856U/en active Active
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