Clean steam system with waste heat recovery

Abstract

The utility model discloses a kind of steam line clean steam systems with waste heat recovery, including steam generator, live steam delivery line, steam line, waste steam recovery line and waste steam discharge line, the waste steam recovery line is communicated with steam line and steam generator, for recovering the waste steam generated by steam line to steam generator, including multi-matrix temperature sensing component, waste steam regulating valve and high-pressure steam compressor, the waste steam regulating valve is set to multi-channel valve body combination, according to the temperature data of multi-matrix temperature sensing component to open corresponding channel.The utility model constructs distributed sensor network using multi-matrix temperature sensing component, forms the dynamic thermodynamic atlas of waste steam recovery line, and different temperature zone waste heat is recovered accurately by waste steam regulating valve grading simultaneously.Compared with prior art, the steam line clean steam system with waste heat recovery of the utility model has less heat energy loss and high energy utilization rate.

Description

Technical Field

[0001] This utility model relates to the field of steam lines, and in particular to a clean steam system for steam lines with waste heat recovery. Background Technology

[0002] Currently, clean steam systems in steam production lines typically generate clean steam by cooling high-pressure live steam through a heat exchanger and pressure reducing valve, and then transporting the clean steam to the steam production line for material cooking. However, the waste heat steam generated during the cooking process exhibits significant temperature differences in different process zones, making it difficult to achieve efficient recovery and utilization within the system. In existing technologies, this waste heat steam is mostly directly discharged into the atmosphere, or simply recovered through heat exchange to produce low-temperature hot water for production and domestic use, failing to fully exploit its thermal energy potential. This extensive approach to thermal energy management results in significant overall system thermal energy loss and low energy utilization.

[0003] Based on the above, the existing clean steam system for steam lines needs further improvement. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of low energy utilization in existing clean steam line systems and to provide a clean steam line system with waste heat recovery. This system uses a multi-matrix temperature sensing component to construct a distributed sensor network, forming a dynamic thermodynamic spectrum of the waste steam recovery pipeline. At the same time, it uses a waste steam regulating valve to accurately and grade the waste heat in different temperature zones, thereby reducing heat loss and improving energy utilization.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a clean steam system for a steam line with waste heat recovery, comprising a steam line; a steam generator, the steam outlet of which is connected to the waste steam inlet of the steam line via a cooking pipeline; a waste steam recovery pipeline, comprising a multi-matrix temperature sensing component, a waste steam regulating valve, and a high-pressure steam compressor connected in sequence, the waste steam recovery pipeline connecting the waste steam outlet of the steam line and the steam inlet of the steam generator; the waste steam regulating valve is configured as a multi-channel combined valve body, and the multi-matrix temperature sensing component is used to monitor the temperature distribution at various locations within the waste steam recovery pipeline, the waste steam regulating valve selectively opening corresponding channels based on the temperature distribution data at various locations within the waste steam recovery pipeline; a live steam conveying pipeline, the live steam conveying pipeline being connected to the waste steam recovery pipeline, the waste steam being compressed by the high-pressure steam compressor and mixed with the live steam in the live steam conveying pipeline and conveyed to the steam generator; and a waste steam discharge pipeline, the waste steam discharge pipeline being connected to the waste steam outlet for discharging the waste steam generated by the steam generator.

[0006] This invention employs a multi-matrix temperature sensing component to construct a distributed sensor network, enabling real-time dynamic monitoring of the temperature distribution in each process section of the steam production line. This generates a dynamic thermodynamic map of the waste heat recovery pipeline, accurately identifying the waste heat distribution characteristics of the steam production line. Simultaneously, waste heat is precisely graded and recovered in different temperature zones based on real-time monitoring data via waste heat regulating valves. Compared to existing technologies, this invention's clean steam system with waste heat recovery results in less heat loss and higher energy utilization.

[0007] Preferably, the multi-matrix temperature sensing component includes several waste steam temperature sensors, which are used to monitor the temperature distribution on the waste steam recovery pipeline; the real-time data from the several waste steam temperature sensors form a dynamic thermodynamic spectrum on the waste steam recovery pipeline, providing adjustment data for the waste steam regulating valve.

[0008] Preferably, a clean steam regulating valve is provided on the waste steam discharge pipeline, and a clean steam pressure sensor is provided between the steam generator and the steam line. The clean steam regulating valve is linked with the high-pressure steam compressor for control, so that the clean steam pressure sensor is maintained at a set value. The clean steam pressure sensor is used to detect whether the clean steam output by the steam generator reaches the required pressure of the steam line. Since the steam line requires a specific clean steam pressure, the high-pressure steam compressor and the clean steam regulating valve respectively control the gas pressure input to the steam generator and the gas pressure discharged from the steam generator to achieve linkage control of the clean steam pressure.

[0009] Preferably, the exhaust gas discharge pipeline further includes an exhaust gas-soft water preheater and an exhaust gas pressure sensor connected in sequence, and the clean steam regulating valve is adjusted according to the pressure data of the exhaust gas pressure sensor.

[0010] Preferably, the live steam conveying pipeline is equipped with a live steam regulating valve, the input port of which is located between the high-pressure steam compressor and the steam generator; the live steam is mixed with the waste steam compressed by the high-pressure steam compressor and then input into the steam generator to work, thereby reducing the consumption of live steam.

[0011] Preferably, it also includes a water supply pipeline and a drainage pipeline. The steam generator is provided with a soft water inlet and a condensate outlet. The water supply pipeline is connected to the soft water inlet, and the drainage pipeline is connected to the condensate outlet and the sewage station. The water supply pipeline is used to provide soft water to the steam generator, and the drainage pipeline is used to discharge condensate.

[0012] Preferably, the drainage pipeline includes a condensate storage tank, a condensate pump, and a condensate-soft water preheater connected in sequence, with the other end of the condensate-soft water preheater connected to a sewage treatment plant.

[0013] Preferably, the condensate-soft water preheater is provided with a first inlet and a first outlet, and the waste steam-soft water preheater is provided with a second inlet and a second outlet. The water supply pipeline is sequentially connected to the first inlet, the first outlet, the second inlet, the second outlet, the soft water makeup valve, and the soft water inlet. Before the soft water is fed into the steam generator, it is preheated by the condensate-soft water preheater and the waste steam-soft water preheater, making full use of the heat from the condensate and waste steam to increase the temperature of the soft water, reduce the temperature difference required to boil the soft water, and reduce steam consumption.

[0014] Preferably, a flash steam recovery pipeline is connected between the waste steam regulating valve and the high-pressure steam compressor. The flash steam recovery pipeline is sequentially connected to a flash evaporation device, a flash evaporation pressure sensor, and a flash steam regulating valve. When the flash evaporation pressure sensor detects that the start-up conditions have been met, the flash steam regulating valve opens, and the flash evaporation waste steam enters the waste steam recovery pipeline. After mixing with the steam line waste steam, it is heated and pressurized by the high-pressure steam compressor and then enters the steam generator.

[0015] Preferably, the steam generator includes a shell and several heat exchange plates, which are evenly distributed inside the shell. The shell is provided with a drain outlet and a level gauge. When the level gauge detects that the liquid level has dropped to a set value, the soft water supply valve is opened. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the present invention.

[0017] Label Explanation: Clean steam system with waste heat recovery: 1. Steam generator; 2. Steam inlet; 21. Steam outlet; 22. Waste steam outlet; 23. Soft water inlet; 24. Condensate outlet; 25. Shell; 26. Heat exchange plate; 27. Drain outlet; 28. Level gauge; 29. ​​Steam line; 3. Water supply pipeline; 4. Soft water makeup valve; 41. Live steam delivery pipeline; 5. Live steam regulating valve; 51. Clean steam pressure sensor; 6. Waste steam recovery pipeline; 7. Multi-matrix temperature sensing assembly; 71. Waste steam temperature sensor. 711, Waste steam regulating valve; 72, High-pressure steam compressor; 73, Waste steam discharge pipeline; 8, Waste steam-soft water preheater; 81, Second inlet; 811, Second outlet; 812, Waste steam pressure sensor; 83, Clean steam regulating valve; 84, Drainage pipeline; 9, Condensate-soft water preheater; 91, First inlet; 911, First outlet; 912, Condensate storage tank; 92, Condensate pump; 93, Flash steam recovery pipeline; 10, Flash steam pressure sensor; 101, Flash steam regulating valve; 102. Detailed Implementation

[0018] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "horizontal", "inner", and "outer" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0019] See Figure 1 This embodiment discloses a clean steam system 1 with waste heat recovery for a steam line, including a steam line 3; a steam generator 2, the steam outlet 22 of which is connected to the waste steam inlet of the steam line via a cooking pipeline; and a waste steam recovery pipeline 7, which includes a multi-matrix temperature sensing assembly 71, a waste steam regulating valve 72, and a high-pressure steam compressor 73 connected in sequence, and the waste steam recovery pipeline connects the waste steam outlet of the steam line and the steam inlet of the steam generator; the waste steam regulating valve 72 is configured as a multi-channel combined valve body. The multi-matrix temperature sensing component 71 is used to monitor the temperature distribution at various locations within the waste steam recovery pipeline. The waste steam regulating valve can selectively open the corresponding channel based on the temperature distribution data at various locations within the waste steam recovery pipeline. The live steam conveying pipeline 5 is connected to the waste steam recovery pipeline. Waste steam is compressed by the high-pressure steam compressor and mixed with the live steam in the live steam conveying pipeline before being conveyed to the steam generator. The waste steam discharge pipeline 8 is connected to the waste steam outlet 23 and is used to discharge the waste steam generated by the steam generator 2.

[0020] Specifically, the waste steam regulating valve 72 opens the corresponding channel and adjusts the valve opening size according to the monitoring data of the multi-matrix temperature sensing component 71 for waste heat in different temperature zones. It reduces the valve opening for waste heat with higher temperature and increases the valve opening for waste heat with lower temperature.

[0021] To construct a distributed sensor network on the waste gas recovery pipeline 7, the multi-matrix temperature sensing component 71 includes several waste gas temperature sensors 711, which are used to monitor the temperature distribution on the waste gas recovery pipeline 7.

[0022] A clean steam regulating valve 84 is installed on the waste steam discharge pipeline 8, and a clean steam pressure sensor 6 is installed between the steam generator 2 and the steam line 3. The clean steam regulating valve 84 is linked to the high-pressure steam compressor 73 for control, so that the clean steam pressure sensor 6 is maintained at a set value. In this scheme, the clean steam regulating valve 84 and the high-pressure steam compressor 73 respectively control the waste steam discharge pressure and input pressure of the steam generator 2, and the linkage ensures that the heat exchange efficiency of the waste steam pressure meets the process requirements of the steam line 3.

[0023] The waste steam discharge pipeline 8 also includes a waste steam-soft water preheater 81 and a waste steam pressure sensor 83 connected in sequence. The clean steam regulating valve 84 is adjusted according to the pressure data of the waste steam pressure sensor 83.

[0024] Specifically, when the pressure value of the clean steam pressure sensor 6 is maintained at the set value, the actual pressure value of the waste steam pressure sensor 83 is higher than the actual pressure value of the clean steam pressure sensor 6.

[0025] The live steam conveying pipeline 5 is equipped with a live steam regulating valve 51, whose input port is located between the high-pressure steam compressor 73 and the steam generator 2. In this scheme, the live steam regulating valve 51 and the high-pressure steam compressor 73 jointly control the process pressure required by the output steam line 3, eliminating the pressure reduction step in the existing process and reducing equipment redundancy and power consumption.

[0026] Specifically, in order to maintain the clean steam outlet pressure at the set value and ensure stable cooking in steam line 3, when the waste steam pressure in waste steam recovery pipeline 7 is insufficient and the clean steam outlet pressure cannot be maintained at the set value even with the linkage control of clean steam regulating valve 84 and high-pressure steam compressor 73, the live steam regulating valve 51 is opened.

[0027] To facilitate heat exchange within the steam generator 2 by supplying soft water inflow and condensate outflow, a water supply pipeline 4 and a drainage pipeline 9 are also included. The steam generator 2 is equipped with a soft water inlet 24 and a condensate outlet 25. The water supply pipeline 4 is connected to the soft water inlet 24, and the drainage pipeline 9 is connected to the condensate outlet 25 and the sewage treatment plant.

[0028] The drainage pipeline 9 includes a condensate storage tank 92, a condensate pump 93, and a condensate-soft water preheater 91 connected in sequence, with the other end of the condensate-soft water preheater 91 connected to a sewage treatment plant.

[0029] To fully recover and utilize the waste heat from waste steam and condensate, the condensate-soft water preheater 91 is provided with a first inlet 911 and a first outlet 912, and the waste steam-soft water preheater 81 is provided with a second inlet 811 and a second outlet 812. The water supply pipeline 4 is sequentially connected to the first inlet 911, the first outlet 912, the second inlet 811, the second outlet 812, the soft water supply valve 41, and the soft water inlet 24.

[0030] To simultaneously recover flash steam, a flash steam recovery pipeline 10 is connected between the waste steam regulating valve 72 and the high-pressure steam compressor 73. The flash steam recovery pipeline 10 is sequentially connected to a flash evaporation device (not shown in the figure), a flash pressure sensor 101, and a flash steam regulating valve 102.

[0031] The steam generator 2 includes a housing 26 and several heat exchange plates 27, which are evenly distributed within the housing 26. The housing 26 is equipped with a drain port 28 and a level gauge 29. In this design, when the level gauge 210 detects that the liquid level has dropped to a set value, the soft water supply valve 911 opens.

[0032] Specifically, this scheme uses a PID algorithm for control, and coordinates the variable frequency motor, the live steam regulating valve 51 and the clean steam regulating valve 84 to generate clean steam that meets the process pressure requirements directly based on the feedback data from the pressure sensor.

[0033] This invention employs a multi-matrix temperature sensing component 71 to construct a distributed sensor network, enabling real-time dynamic monitoring of the temperature distribution in each process section of the steam line 3. This generates a dynamic thermodynamic map of the waste heat recovery pipeline 7, accurately identifying the waste heat distribution characteristics of the steam line 3. Simultaneously, the waste heat regulating valve 72 performs precise graded recovery of waste heat from different temperature zones based on real-time monitoring data. Compared with existing technologies, the clean steam system 1 of the steam line with waste heat recovery in this invention exhibits lower heat loss and higher energy utilization.

[0034] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A clean steam system for a steam line with waste heat recovery, characterized in that, include Steam line (3); Steam generator (2), the steam outlet (22) of the steam generator (2) is connected to the waste steam inlet of the steam line through the cooking pipeline; Waste steam recovery pipeline (7), the waste steam recovery pipeline (7) includes a multi-matrix temperature sensing component (71), a waste steam regulating valve (72) and a high-pressure steam compressor (73) connected in sequence. The waste steam recovery pipeline connects the waste steam outlet of the steam line and the steam inlet of the steam generator. The waste steam regulating valve (72) is configured as a multi-channel combined valve body. According to the temperature distribution of each position in the waste steam recovery pipeline monitored by the multi-matrix temperature sensing component (71), the waste steam regulating valve can selectively open the corresponding channel according to the temperature distribution data of each position in the waste steam recovery pipeline. The live steam conveying pipeline (5) is connected to the waste steam recovery pipeline. The waste steam is compressed by the high-pressure steam compressor and mixed with the live steam in the live steam conveying pipeline and then conveyed to the steam generator. Waste steam discharge pipeline (8) is connected to waste steam outlet (23) and is used to discharge waste steam generated by steam generator (2).

2. The steam system according to claim 1, characterized in that, The multi-matrix temperature sensing component (71) includes several waste gas temperature sensors (711), which are used to monitor the temperature distribution on the waste gas recovery pipeline (7).

3. The steam system according to claim 1, characterized in that, The waste steam discharge pipeline (8) is equipped with a clean steam regulating valve (84), and a clean steam pressure sensor (6) is provided between the steam generator (2) and the steam line (3). The clean steam regulating valve (84) is linked to the high-pressure steam compressor (73) for control, so that the clean steam pressure sensor (6) is maintained at the set value.

4. The steam system according to claim 3, characterized in that, The waste steam discharge pipeline (8) also includes a waste steam-soft water preheater (81) and a waste steam pressure sensor (83) connected in sequence. The clean steam regulating valve (84) is adjusted according to the pressure data of the waste steam pressure sensor (83).

5. The steam system according to claim 1, characterized in that, The live steam conveying pipeline (5) is equipped with a live steam regulating valve (51), the input port of which is located between the high-pressure steam compressor (73) and the steam inlet (21).

6. The steam system according to claim 4, characterized in that, It also includes a water supply pipeline (4) and a drainage pipeline (9). The steam generator (2) is provided with a soft water inlet (24) and a condensate outlet (25). The water supply pipeline (4) is connected to the soft water inlet (24), and the drainage pipeline (9) is connected to the condensate outlet (25) and the sewage station.

7. The steam system according to claim 6, characterized in that, The drainage pipeline (9) includes a condensate storage tank (92), a condensate pump (93), and a condensate-soft water preheater (91) connected in sequence, with the other end of the condensate-soft water preheater (91) connected to a sewage treatment plant.

8. The steam system according to claim 7, characterized in that, The condensate-soft water preheater (91) is provided with a first inlet (911) and a first outlet (912), and the waste steam-soft water preheater (81) is provided with a second inlet (811) and a second outlet (812). The water supply pipeline (4) is connected in sequence to the first inlet (911), the first outlet (912), the second inlet (811), the second outlet (812), the soft water supply valve (41), and the soft water inlet (24).

9. The steam system according to claim 1, characterized in that, A flash steam recovery pipeline (10) is connected between the waste steam regulating valve (72) and the high-pressure steam compressor (73). The flash steam recovery pipeline (10) is connected in sequence to a flash steam device, a flash steam pressure sensor (101) and a flash steam regulating valve (102).

10. The steam system according to claim 1, characterized in that, The steam generator (2) includes a shell (26) and several heat exchange plates (27), which are evenly distributed inside the shell (26). The shell (26) is provided with a drain port (28) and a level gauge (29).

Images