Waste heat recovery system and boiler system
The waste heat recovery system addresses the inefficiency in boiler systems by installing a bypass to recover waste heat for heating equipment and drain recovery, enhancing energy utilization and reducing waste.
Patent Information
- Application Number
- CN202420317390.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-20
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-02-20
AI Technical Summary
Existing boiler systems fail to recover the heat from continuous drainage, leading to waste of heat energy and inefficient utilization of drainage fluid, with drainage sewage overflowing to wastewater treatment stations.
A waste heat recovery system is installed downstream of the series expansion vessel, incorporating a first recovery bypass to contact equipment for heating, with optional temperature and pressure regulation, and a second bypass for drain recovery to a cooling pool, utilizing waste heat for heating and reducing energy waste.
The system effectively recovers waste heat for heating equipment and reduces energy waste by utilizing the heat in waste hot water, improving economic benefits and reducing overflow to wastewater treatment.
Smart Images
Figure CN222230518U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of heat recovery technology, and in particular, to a waste heat recovery system and a boiler system. Background Art
[0002] The existing boiler system does not recover the heat of the continuous drainage, nor does it recycle the drainage working fluid. The boiler continuous drainage waste heat recovery only recovers part of the continuous drainage waste heat to the deaerator, and the continuous drainage sewage enters the fixed drainage expansion tank and overflows to the wastewater treatment station through the fixed drainage pool, resulting in the waste of continuous drainage heat and drainage. Utility Model Content
[0003] The purpose of the present disclosure is to provide a waste heat recovery system and a boiler system, in which a recovery bypass is arranged downstream of the series expansion vessel to contact with the equipment to be heated, so as to recover and utilize the waste heat of the boiler.
[0004] In order to achieve the above object, the present disclosure provides a waste heat recovery system, comprising:
[0005] Fixed row expansion container, used to connect with the boiler;
[0006] A continuous expansion tank, used to be connected to the boiler, and the continuous expansion tank can be connected to the upstream of the fixed-row expansion tank in an on-off manner;
[0007] A first recovery bypass is connected to the downstream of the series expansion container. A heating part is formed downstream of the first recovery bypass. The heating part is used to contact with the equipment to be heated.
[0008] Optionally, a connecting pipeline is connected between the continuous row expansion tank and the fixed row expansion tank, and a first isolation valve capable of connecting the continuous row expansion tank and the fixed row expansion tank in an on-off manner is provided on the connecting pipeline, wherein the first recovery bypass is connected to the connecting pipeline, and the first recovery bypass is provided upstream of the first isolation valve.
[0009] Optionally, a temperature and pressure reduction element is further provided on the connecting pipeline, and the temperature and pressure reduction element is provided upstream of the first recovery bypass.
[0010] Optionally, the first recovery bypass includes a second isolation valve, and the second isolation valve can connect the series expansion container to the heating part in an on-off manner.
[0011] Optionally, the first recovery bypass further includes a temperature adjustment element, and the temperature adjustment element is arranged between the heating part and the second isolation valve.
[0012] Optionally, the first recovery bypass is also connected to a first branch, the first branch is connected upstream of the temperature adjustment element, and the upstream of the first branch is used to connect to a heating source.
[0013] Optionally, a second recovery bypass is connected to the downstream of the fixed-row expansion vessel, and the second recovery bypass is used to connect to a cooling pool.
[0014] Optionally, the downstream of the heating part is used to be connected to the cooling pool.
[0015] Optionally, a drain pump and a fixed drainage pool are further provided on the second recovery bypass, the fixed drainage pool is provided upstream of the drain pump, and the drain pump is used to be provided upstream of the cooling pool.
[0016] According to another aspect of the present disclosure, there is provided a boiler system, comprising a sootblowing drain end, a steam drum, a deaerator and the above-mentioned waste heat recovery system, wherein the upstream of the fixed-row expansion vessel is connected to the sootblowing drain end, the upstream of the continuous-row expansion vessel is connected to the steam drum, and the downstream of the continuous-row expansion vessel is connected to the deaerator.
[0017] Through the above technical solution, a first recovery bypass capable of contacting the equipment to be heated is installed on the series expansion tank, so that the heat in the waste hot water discharged from the series expansion tank can be utilized, thereby achieving the purpose of recovering the waste heat of the boiler, reducing energy waste and improving economic benefits.
[0018] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:
[0020] Figure 1 is a schematic diagram of a boiler system according to an embodiment of the present disclosure.
[0021] Description of Reference Numerals
[0022] 1-fixed row expansion tank; 2-continuous row expansion tank; 3-first recovery bypass; 30-heating part; 31-second isolating valve; 32-temperature regulating element; 33-first branch; 4-equipment to be heated; 5-connecting pipeline; 51-first isolating valve; 52-cooling and pressure reducing element; 6-second recovery bypass; 61-drain pump; 62-fixed drainage tank; 7-cooling tank; 80-heating source; 81-soot blowing drain end; 82-steam drum; 83-deaerator. DETAILED DESCRIPTION
[0023] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.
[0024] In the present disclosure, unless otherwise stated, the directional words such as "upstream" and "downstream" used are defined according to the order of the actual water inlet flow direction of the boiler system, and the terms "first" and "second" used are used to distinguish different components and do not have order and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same reference numerals in different drawings represent the same or similar elements.
[0025] According to one embodiment of the present disclosure, there is provided a waste heat recovery system, comprising a fixed-row expansion tank 1, a continuous-row expansion tank 2 and a first recovery bypass 3. The fixed-row expansion tank 1 is used to be connected to a boiler. The continuous-row expansion tank 2 is used to be connected to a boiler, and the continuous-row expansion tank 2 can be connected to the upstream of the fixed-row expansion tank 1 in an on-off manner. The first recovery bypass 3 can be connected to the downstream of the continuous-row expansion tank 2, and a heating part 30 is formed downstream of the first recovery bypass 3, and the heating part 30 is used to contact with the equipment 4 to be heated. It should be noted that the fixed-row expansion tank 1 refers to a periodic sewage expansion tank in a boiler system, and the continuous-row expansion tank 2 refers to a continuous sewage expansion tank in a boiler system.
[0026] Through the above technical solution, a first recovery bypass 3 capable of contacting the equipment to be heated 4 is installed on the series expansion tank 2, so that the heat in the waste hot water discharged from the series expansion tank 2 can be utilized, thereby achieving the purpose of recovering the waste heat of the boiler, reducing energy waste and improving economic benefits.
[0027] It should be noted that the heating part 30 here can be the part of the downstream of the first recovery bypass 3 that contacts the device to be heated 4, so that the waste hot water in the first recovery bypass 3 performs heat exchange with the device to be heated 4 to increase the temperature of the device to be heated 4, and the heating part 30 can also directly contact the heating source in the device to be heated 4, which is not limited in the present disclosure. The heating part 30 can be spiral or wavy, which is also not limited in the present disclosure. The device to be heated 4 can be a swimming pool, and heaters such as raw water heaters and fan heaters in power plants are also within the protection scope of the present disclosure.
[0028] Furthermore, if Figure 1As shown, a connecting pipeline 5 may be connected between the continuous expansion tank 2 and the fixed-row expansion tank 1, and a first isolation valve 51 is provided on the connecting pipeline 5, which enables the continuous expansion tank 2 and the fixed-row expansion tank 1 to be connected and disconnected, wherein the first recovery bypass 3 is connected to the connecting pipeline 5, and the first recovery bypass 3 is arranged upstream of the first isolation valve 51. In this way, if the device to be heated 4 needs to be heated, the first isolation valve 51 is closed, the continuous expansion tank 2 is connected to the first recovery bypass 3, and the device to be heated 4 is heated. If the device to be heated 4 does not need to be heated, the first isolation valve 51 is opened, the continuous expansion tank 2 is connected to the fixed-row expansion tank 1, and the waste hot water in the continuous expansion tank 2 flows into the fixed-row expansion tank 1 for treatment.
[0029] Furthermore, if Figure 1 As shown, a temperature and pressure reducing element 52 may also be provided on the connecting pipeline 5, and the temperature and pressure reducing element 52 is provided upstream of the first recovery bypass 3. This is to prevent the temperature and pressure of the working fluid discharged from the row expansion vessel 2 from being too high, causing the row expansion vessel 1 or the equipment to be heated 4 to be unable to withstand and cause equipment damage.
[0030] According to one embodiment of the present disclosure, Figure 1 As shown, the first recovery bypass 3 may include a second isolation valve 31, and the second isolation valve 31 can connect the series expansion tank 2 and the heating part 30 in an on-off manner. The second isolation valve 31 can be an electric valve, which does not need to be manually operated. The second isolation valve 31 can also control the opening degree, so that not only the on-off condition of the first recovery bypass 3 can be effectively controlled, but also the flow rate of waste hot water flowing through the first recovery bypass 3 can be controlled, so as to effectively control the heating condition of the heating equipment 4.
[0031] Furthermore, if Figure 1 As shown, the first recovery bypass 3 may further include a temperature regulating element 32, which is disposed between the heating portion 30 and the second isolation valve 31. The temperature regulating element 32 may be a temperature regulating valve to regulate the heating temperature of the device to be heated 4, and further effectively control the heating condition of the device to be heated 4.
[0032] Furthermore, if Figure 1 As shown, the first recovery bypass 3 may also be connected to a first branch 33, the first branch 33 is connected upstream of the temperature adjustment element 32, and the upstream of the first branch 33 is used to connect a heating source 80. When the waste hot water flow or temperature of the row expansion tank 2 flowing to the first recovery bypass 3 is insufficient, the heating source of the first branch 33 may be connected to supplement the heat to ensure the heating of the device to be heated 4. The heating source 80 here may be a heating device, or may be connected to a related heating pipeline or a standby steam source in an adjacent boiler, which is not limited in the present disclosure.
[0033] According to one embodiment of the present disclosure, Figure 1 As shown, a second recovery bypass 6 may be connected to the downstream of the fixed-row expansion vessel 1, and the second recovery bypass 6 is used to connect to a cooling pool 7, where the cooling pool 7 may be a fore pool of a cooling tower, or a water storage area in other cooling equipment, and the present disclosure does not limit this. The second recovery bypass 6 connected to the cooling pool 7 may partially recover the drain generated by the waste hot water flowing out of the fixed-row expansion vessel 1, thereby reducing the waste of drain from the fixed-row expansion vessel 1. It should be noted here that the drain is the steam condensate in the steam pipe and steam-using equipment in the boiler system. During the troubleshooting of the heater in the equipment to be heated 4, the drain may be the drain of the boiler's continuous row expansion vessel 2. During the correct operation of the heater in the equipment to be heated 4, the drain may be the drain of the boiler soot blower.
[0034] Furthermore, if Figure 1 As shown, the downstream of the heating unit 30 can also be used to connect to the cooling pool 7, where the cooling pool 7 can also be the fore pool of the cooling tower mentioned above, or can be a water storage area in other cooling equipment, which is not limited in the present disclosure. After the waste hot water discharged from the row expansion tank 2 flows through the heating unit 30 to heat the heating equipment 4, the generated drain can be recovered, which can reduce the drain waste of the boiler system while utilizing the waste heat.
[0035] According to an embodiment of the present disclosure, a drain pump 61 and a fixed drainage pool 62 are further provided on the second recovery bypass 6. The fixed drainage pool 62 is provided upstream of the drain pump 61, and the drain pump 61 is used to be provided upstream of the cooling pool 7. The fixed drainage pool 62 can collect the drain water generated by the waste hot water discharged from the fixed discharge expansion tank 1, and the drain water can be at least partially discharged into the cooling pool 7 through the drain pump 61 to at least partially recover the drain water. The fixed drainage pool 62 can also be connected to a sewage pool to discharge the waste water that cannot be recycled.
[0036] Based on the above solution, the present disclosure also provides a boiler system, such as Figure 1 As shown, it may include a sootblowing drain end 81, a steam drum 82, a deaerator 83 and the above-mentioned waste heat recovery system, the upstream of the fixed row expander 1 may be connected to the sootblowing drain end 81, the upstream of the continuous row expander 2 is connected to the steam drum 82, and the downstream of the continuous row expander 2 is connected to the deaerator 83. In this way, the steam of the continuous row expander 2 can also be recovered to the deaerator 83 for utilization.
[0037] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
[0038] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.
[0039] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.
Claims
1. A waste heat recovery system, characterized in that: include: Fixed row expansion container, used to connect with the boiler; A continuous expansion tank, used for connecting to the boiler, and the continuous expansion tank can be connected to the upstream of the fixed-row expansion tank in an on-off manner; A first recovery bypass is connected to the downstream of the series expansion container. A heating portion is formed downstream of the first recovery bypass. The heating portion is used to contact with the equipment to be heated.
2. The waste heat recovery system according to claim 1, characterized in that: A connecting pipeline is connected between the continuous row expander and the fixed row expander, and a first isolation valve is arranged on the connecting pipeline, which can connect the continuous row expander and the fixed row expander in an on-off manner, wherein the first recovery bypass is connected to the connecting pipeline, and the first recovery bypass is arranged upstream of the first isolation valve.
3. The waste heat recovery system according to claim 2, characterized in that: The connecting pipeline is also provided with a temperature-reducing and pressure-reducing element, and the temperature-reducing and pressure-reducing element is arranged upstream of the first recovery bypass.
4. The waste heat recovery system according to claim 1, characterized in that: The first recovery bypass includes a second isolation valve, and the second isolation valve can connect the series expansion container and the heating part in an on-off manner.
5. The waste heat recovery system according to claim 4, characterized in that: The first recovery bypass further includes a temperature adjustment element, and the temperature adjustment element is disposed between the heating portion and the second isolation valve.
6. The waste heat recovery system according to claim 5, characterized in that: The first recovery bypass is also connected to a first branch, the first branch is connected upstream of the temperature adjustment element, and the upstream of the first branch is used to connect to a heating source.
7. The waste heat recovery system according to claim 1, characterized in that: A second recovery bypass is connected to the downstream of the fixed-row expansion container, and the second recovery bypass is used to connect to a cooling pool.
8. The waste heat recovery system according to claim 7, characterized in that: The downstream of the heating part is used to be connected to the cooling pool.
9. The waste heat recovery system according to claim 7, characterized in that: The second recovery bypass is also provided with a drain pump and a fixed drainage pool. The fixed drainage pool is arranged upstream of the drain pump, and the drain pump is arranged upstream of the cooling pool.
10. A boiler system, characterized in that: It comprises a sootblowing drain end, a steam drum, a deaerator and a waste heat recovery system according to any one of claims 1 to 9, wherein the upstream of the fixed-row expansion vessel is connected to the sootblowing drain end, the upstream of the continuous-row expansion vessel is connected to the steam drum, and the downstream of the continuous-row expansion vessel is connected to the deaerator.