Off-spec steam condensate recovery
Patent Information
- Application Number
- CN202522388452.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-11
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-11-11
AI Technical Summary
[0005]本实用新型的目的在于提供一种不合格蒸汽冷凝水回收装置，以解决上述背景技术中提出的缺少对不合格蒸汽冷凝水的回收装置，导致不合格蒸汽冷凝水无法进行回收使用，从而造成能源的浪费的技术问题
[0013]本实用新型首先对冷凝水进行监测时，冷凝水可以通过人工进行精准检验，形成“在线实时监测 + 人工精准核验” 的双重水质分析机制，确保水质数据的准确性与可靠性，为实现智能化管控，所有在线监测器测量数据均通过485通讯信号传输至中央控制系统，操作人员可在中控室远程查看实时水质参数，无需现场值守，其次不合格的冷凝水通过板式换热器传递给低温的糖厂软化水，使软化水供水温度得到提升，这一过程减少了糖厂后续加热软化水所需的蒸汽投入量，降低了蒸汽消耗与能源成本，符合节能降耗的生产需求。
Smart Images
Figure CN224920979U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste heat recovery and energy-saving technology, specifically to a substandard steam condensate recovery device. Background Technology
[0002] With the development of industrial technology and the growth of energy demand, energy conservation and consumption reduction have become important issues in the industrial sector. In the daily operation of thermal power plants, qualified steam condensate can be directly used as boiler feedwater, but discharging unqualified steam condensate is a waste of energy.
[0003] In existing thermal power plants, steam condensate that fails quality tests is directly discharged to the outside. Due to the lack of a recovery device for the substandard steam condensate, it cannot be recycled and reused, resulting in energy waste.
[0004] In view of this, it is necessary to develop a device for recovering substandard steam condensate, so as to recycle and reuse substandard steam condensate. Utility Model Content
[0005] The purpose of this utility model is to provide a device for recovering substandard steam condensate, so as to solve the technical problem mentioned in the background art of the lack of a device for recovering substandard steam condensate, which leads to the inability to recover and reuse substandard steam condensate, resulting in energy waste.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for recovering substandard steam condensate, comprising: a condensate transmission pipeline, a buffer tank, and a plate heat exchanger. A water quality monitoring module is embedded on the outside of the condensate transmission pipeline. A sampling valve is installed through one side of the condensate transmission pipeline. A first control valve is installed on the outside of the bottom of the condensate transmission pipeline. A second connecting pipe is installed through one side of the bottom of the buffer tank. One end of the second connecting pipe is connected to a transmission pump. The output end of the transmission pump is connected to a third connecting pipe. One end of the third connecting pipe is connected to the bottom inlet of the plate heat exchanger via a flange.
[0007] Preferably, the water quality monitoring module is connected to an online monitor via a connecting cable, and the online monitor has a display screen mounted on its front.
[0008] Preferably, a first connecting pipe is welded to the outside of the condensate transmission pipe, a second control valve is installed on the outside of the first connecting pipe, one end of the first connecting pipe is connected to a defective transmission pipe, and the other end of the defective transmission pipe is connected to a buffer water tank.
[0009] Preferably, the bottom outlet of the plate heat exchanger is equipped with a conduit via a flange, and the top outlet of the plate heat exchanger is equipped with a fourth connecting pipe and a fifth connecting pipe via flanges respectively.
[0010] Preferably, the top ends of the fourth connecting pipe and the fifth connecting pipe are respectively connected to a soft water main pipe, and a separation valve is installed on the outside of the soft water main pipe, and the separation valve is located between the top ends of the fourth connecting pipe and the fifth connecting pipe and the soft water main pipe.
[0011] Preferably, the water quality monitoring module includes a pH detector, a conductivity detector, and a hardness detector.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] This invention firstly monitors condensate water, which can be precisely tested manually, forming a dual water quality analysis mechanism of "online real-time monitoring + manual precise verification" to ensure the accuracy and reliability of water quality data. To achieve intelligent management, all online monitoring data is transmitted to the central control system via 485 communication signals. Operators can remotely view real-time water quality parameters in the central control room without on-site supervision. Secondly, substandard condensate water is transferred to the low-temperature softened water in the sugar factory through a plate heat exchanger, thereby increasing the temperature of the softened water supply. This process reduces the amount of steam required for subsequent heating of the softened water in the sugar factory, lowering steam consumption and energy costs, and meeting the production requirements for energy conservation and consumption reduction. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the condensate transmission pipeline structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the online monitoring device structure of this utility model;
[0017] Figure 4 This is a schematic diagram of the plate heat exchanger structure of this utility model.
[0018] In the diagram: 1. Condensate transfer pipe; 2. Water quality monitoring module; 3. Sampling valve; 4. First control valve; 5. First connecting pipe; 6. Second control valve; 7. Online monitor; 8. Display screen; 9. Non-conforming transfer pipe; 10. Buffer tank; 11. Second connecting pipe; 12. Transfer pump; 13. Plate heat exchanger; 14. Third connecting pipe; 15. Conduit; 16. Fourth connecting pipe; 17. Fifth connecting pipe; 18. Soft water main pipe; 19. Separator valve. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do 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, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0022] Please see Figures 1-4 A substandard steam condensate recovery device;
[0023] The system includes: a condensate transfer pipe 1, a buffer tank 10, and a plate heat exchanger 13. A water quality monitoring module 2 is embedded on the outside of the condensate transfer pipe 1. A sampling valve 3 is installed through one side of the condensate transfer pipe 1. A first control valve 4 is installed on the outside of the bottom of the condensate transfer pipe 1. A second connecting pipe 11 is installed through one side of the bottom of the buffer tank 10. One end of the second connecting pipe 11 is connected to a transfer pump 12. The output end of the transfer pump 12 is connected to a third connecting pipe 14. One end of the third connecting pipe 14 is connected to the bottom inlet of the plate heat exchanger 13 through a flange. The water quality monitoring module 2 includes a pH detector, a conductivity detector, and a hardness detector. The connection end of the water quality monitoring module 2 is connected to an online monitor 7 through a connecting wire. A display screen 8 is installed on the front of the online monitor 7. A first connecting pipe 5 is welded to the outside of the condensate transfer pipe 1. A second control valve 6 is installed on the outside of the first connecting pipe 5. One end of the first connecting pipe 5 is connected to a non-conforming transfer pipe 9, and the other end of the non-conforming transfer pipe 9 is connected to the buffer tank 10.
[0024] The condensate transfer pipeline 1 transmits condensate from the first-line production line, the second-line production line, and the starch process return water. During transmission through pipeline 1, the water quality is monitored by a water quality monitoring module 2, providing core data support for subsequent water treatment processes and system stability. The water quality monitoring module 2 includes a pH detector, a conductivity detector, and a hardness detector, which can monitor the acidity / alkalinity, ionic conductivity, and calcium and magnesium ion content (hardness) of the water in real time. The monitored values are displayed on the screen 8 of the online monitor 7. Simultaneously, the sampling valve 3 is opened by rotation, allowing for precise manual testing of the condensate. This forms a dual water quality analysis mechanism of "online real-time monitoring + precise manual verification," ensuring the accuracy and reliability of water quality data. To achieve intelligent control, all measurement data from the online monitor 7 are transmitted via 485... The communication signal is transmitted to the central control system, and operators can remotely view real-time water quality parameters in the central control room without on-site supervision. When the online monitor 7 shows that the return water quality is qualified, the central control system will automatically command the first control valve 4 to open and the second control valve 6 to close, so that the qualified return water can be connected to the steam and water system for recycling. When the monitoring data shows that the water quality is unqualified, the first control valve 4 will close and the second control valve 6 will open. The system will immediately cut off the qualified return water path and allow the unqualified return water to enter the buffer water tank 10 for temporary storage, so as to avoid the unqualified water quality from causing pollution or damage to the steam and water system, thus realizing the "unmanned" and "automated" water quality control.
[0025] The bottom outlet of the plate heat exchanger 13 is connected to a conduit 15 via a flange. The top outlet of the plate heat exchanger 13 is connected to a fourth connecting pipe 16 and a fifth connecting pipe 17 via flanges. The top ends of the fourth connecting pipe 16 and the fifth connecting pipe 17 are connected to a soft water header 18. A separation valve 19 is installed on the outside of the soft water header 18, and the separation valve 19 is located between the top ends of the fourth connecting pipe 16 and the fifth connecting pipe 17 and the soft water header 18.
[0026] After the substandard condensate enters the buffer tank 10, it is transferred by the transfer pump 12 to the plate heat exchanger 13 through the third connecting pipe 14. Since the temperature of the substandard return water temporarily stored in the buffer tank 10 is too high, it would exceed the equipment's tolerance range if it directly entered the water treatment system, resulting in a decrease in water treatment efficiency or even equipment failure. Therefore, the substandard condensate is transferred to the plate heat exchanger 13 to regulate the temperature of the substandard return water, thus achieving dual benefits.
[0027] Increasing the temperature of the sugar factory's water supply: Plate heat exchanger 13 uses softened water from the sugar factory as the heat exchange medium. The high-temperature heat from the substandard return water is transferred to the low-temperature softened water from the sugar factory through plate heat exchanger 13, thereby increasing the temperature of the softened water supply. This process reduces the amount of steam required for subsequent heating of the softened water in the sugar factory, reducing steam consumption and energy costs, and meeting the production requirements for energy conservation and emission reduction.
[0028] Lowering the return water temperature: While transferring heat, the temperature of the substandard return water will drop simultaneously, eventually reaching the inlet water temperature requirement of the water treatment system (usually ≤40℃, subject to adjustment based on equipment parameters). This ensures that the cooled substandard return water can smoothly enter the water treatment system for purification. After passing the purification process, it can be recycled again, forming a closed-loop process of "return water - heat exchange - treatment - reuse", thereby improving water resource utilization.
[0029] The working principle is as follows: First, three condensate transmission pipes 1 are installed to transmit condensate from the first-line production water, the second-line production water, and the starch process return water, respectively. During the transmission process, the water quality is detected by an online monitor 7. Qualified condensate enters the steam-water system for recycling through the bottom of the condensate transmission pipe 1. Unqualified condensate is transmitted to the buffer tank 10 for temporary storage. The transmission pump 12 then transmits the unqualified condensate to the plate heat exchanger 13, where the plate heat exchanger 13 exchanges heat and recycles the unqualified condensate, thereby improving the utilization rate of water resources.
[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A substandard steam condensate recovery device, characterized in that, Includes: a condensate transmission pipe (1), a buffer tank (10) and a plate heat exchanger (13). A water quality monitoring module (2) is embedded on the outside of the condensate transmission pipe (1). A sampling valve (3) is installed through one side of the condensate transmission pipe (1). A first control valve (4) is installed on the outside of the bottom of the condensate transmission pipe (1). A second connecting pipe (11) is installed through one side of the bottom of the buffer tank (10). A transmission pump (12) is connected to one end of the second connecting pipe (11). A third connecting pipe (14) is connected to the output end of the transmission pump (12). One end of the third connecting pipe (14) is connected to the bottom inlet of the plate heat exchanger (13) through a flange.
2. The substandard steam condensate recovery device according to claim 1, characterized in that: The water quality monitoring module (2) is connected to an online monitor (7) via a connecting line. The online monitor (7) has a display screen (8) installed on its front.
3. The substandard steam condensate recovery device according to claim 2, characterized in that: The condensate transmission pipe (1) is welded to the outside of a first connecting pipe (5), and a second control valve (6) is installed on the outside of the first connecting pipe (5). One end of the first connecting pipe (5) is connected to a defective transmission pipe (9), and the other end of the defective transmission pipe (9) is connected to a buffer water tank (10).
4. The substandard steam condensate recovery device according to claim 1, characterized in that: The bottom outlet of the plate heat exchanger (13) is fitted with a conduit (15) via a flange, and the top outlet of the plate heat exchanger (13) is fitted with a fourth connecting pipe (16) and a fifth connecting pipe (17) via flanges.
5. A device for recovering substandard steam condensate according to claim 4, characterized in that: The top ends of the fourth connecting pipe (16) and the fifth connecting pipe (17) are respectively connected to the soft water mother pipe (18). A separation valve (19) is installed on the outside of the soft water mother pipe (18), and the separation valve (19) is located between the top ends of the fourth connecting pipe (16) and the fifth connecting pipe (17) and the soft water mother pipe (18).
6. The substandard steam condensate recovery device according to claim 1, characterized in that: The water quality monitoring module (2) includes a pH detector, a conductivity detector and a hardness detector.