Steam network condensate collection device
By introducing low-pressure and medium-pressure steam separators and condensate collection tanks into the steam pipeline network, and combining them with the interlocking control of level transmitters and regulating valves, the problems of heat loss and corrosion accumulation of steam condensate have been solved, and the recycling of condensate and efficient utilization of steam have been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 新疆圣雄氯碱有限公司
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-14
AI Technical Summary
In existing technologies, the condensate of low-pressure and medium-pressure steam in steam pipelines suffers significant heat loss and cannot be recovered, leading to increased operation and maintenance costs. Furthermore, the accumulation of condensate may corrode pipelines, posing safety hazards.
Low-pressure steam separators and medium-pressure steam separators are used to collect condensate and return it to the steam pipeline through condensate collection tanks and corresponding pipelines. Combined with the interlocking control of level transmitters and regulating valves, the automated management of condensate and the cascade utilization of heat are realized.
It effectively reduces the amount of steam condensate discharged, saves operating costs, avoids pipeline corrosion caused by condensate accumulation, makes full use of the waste heat of steam, and reduces steam loss.
Smart Images
Figure CN224498169U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat source treatment technology and is a steam pipeline condensate collection device. Background Technology
[0002] The heat source for the stripping tower in the polymerization workshop comes from the low-pressure steam in the steam pipeline network, while the heat source for the dry air heater in the polymerization workshop comes from the medium-pressure steam in the steam pipeline network. During the transportation process, the low-pressure steam and medium-pressure steam cool down due to heat dissipation, producing condensate. If the condensate is not drained and accumulates, it will cause a water hammer effect. At the same time, the condensate may dissolve oxygen and carbon dioxide, and long-term accumulation may corrode the inner wall of the pipeline, shortening the service life of the pipeline. In severe cases, pipeline or valve leaks may cause the polymerization unit to shut down.
[0003] Currently, in the existing steam pipeline network, steam traps are installed every 15 meters along both low-pressure and medium-pressure steam pipelines to drain the condensate from these pipelines into underground trenches. To prevent steam leakage, faulty steam traps need to be replaced and maintained every two years, increasing operating and maintenance costs. Furthermore, during winter operation, to prevent pipeline freezing, the steam condensate drain valves are opened more fully, resulting in a condensate discharge rate of approximately 0.70 t / h, costing about 48.3 yuan / h. Simultaneously, the temperature of the discharged condensate is approximately 95℃, causing heat loss from the condensate of low-pressure and medium-pressure steam, which cannot be recovered and reused. Summary of the Invention
[0004] This invention provides a steam pipeline condensate collection device that overcomes the shortcomings of the prior art. It can effectively solve the problem of heat loss and non-recyclability of low-pressure steam condensate and medium-pressure steam condensate in the existing steam pipeline of the polymerization workshop.
[0005] The technical solution of this utility model is achieved through the following measures: A steam pipeline condensate collection device includes a low-pressure steam separator, a medium-pressure steam separator, a condensate collection tank, a first low-pressure steam pipeline, and a first medium-pressure steam pipeline. A first low-pressure steam condensate pipeline is fixedly connected between the first low-pressure steam pipeline and the upper inlet of the low-pressure steam separator. A low-pressure steam recovery pipeline is fixedly connected between the first low-pressure steam pipeline on the left side of the first low-pressure steam condensate pipeline and the top outlet of the low-pressure steam separator. A first medium-pressure steam condensate pipeline is fixedly connected between the first medium-pressure steam pipeline and the upper inlet of the medium-pressure steam separator. A medium-pressure steam recovery pipeline is fixedly connected between the first medium-pressure steam pipeline on the left side of the first medium-pressure steam condensate pipeline and the top outlet of the medium-pressure steam separator. A first condensate collection pipeline is fixedly connected between the bottom outlet of the low-pressure steam separator and the inlet of the condensate collection tank. A second condensate collection pipeline is fixedly connected between the bottom outlet of the medium-pressure steam separator and the first condensate collection pipeline.
[0006] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:
[0007] The first low-pressure steam pipeline and the first low-pressure steam condensate pipeline are fixedly connected by several first low-pressure steam condensate branch pipes, and the first medium-pressure steam pipeline and the first medium-pressure steam condensate pipeline are fixedly connected by several first medium-pressure steam condensate branch pipes.
[0008] The above also includes a second low-pressure steam pipeline and a second medium-pressure steam pipeline. The second low-pressure steam pipeline and the first low-pressure steam condensate pipeline are fixedly connected by a second low-pressure steam condensate branch pipe. The second medium-pressure steam pipeline and the first medium-pressure steam condensate pipeline are fixedly connected by a second medium-pressure steam condensate branch pipe.
[0009] A first level transmitter is fixedly installed on the low-pressure steam separator. A first regulating valve is provided on the first condensate collection pipeline between the low-pressure steam separator and the second condensate collection pipeline. A second level transmitter is fixedly installed on the medium-pressure steam separator. A second regulating valve is provided on the second condensate collection pipeline. The first level transmitter and the first regulating valve are interlocked. The second level transmitter and the second regulating valve are also interlocked.
[0010] Both the first and second level transmitters are differential pressure level transmitters. The high-pressure side interface of the first level transmitter is connected to the upper interface of the low-pressure steam separator, and the low-pressure side of the first level transmitter is connected to the lower interface of the low-pressure steam separator. The high-pressure side interface of the second level transmitter is connected to the upper interface of the medium-pressure steam separator, and the low-pressure side of the second level transmitter is connected to the lower interface of the medium-pressure steam separator.
[0011] This utility model has a reasonable and compact structure and is easy to use. By adding a low-pressure steam separator and a medium-pressure steam separator and matching pipelines, it collects the condensate of low-pressure steam and medium-pressure steam that accumulates in the pipeline into the low-pressure steam separator and the medium-pressure steam separator. The excess steam in the low-pressure steam separator and the medium-pressure steam separator is then recycled back to the first low-pressure steam pipeline and the first medium-pressure steam pipeline, which greatly reduces steam loss, avoids the waste of condensate heat, and effectively solves the problem of heat loss and non-recyclability of low-pressure steam condensate and medium-pressure steam condensate in the existing steam pipeline network of the polymerization workshop. Attached Figure Description
[0012] Appendix Figure 1 This is a schematic diagram of the process flow of this utility model.
[0013] Appendix Figure 1The codes in the diagram are as follows: 1 for low-pressure steam separator, 2 for medium-pressure steam separator, 3 for condensate collection tank, 4 for first low-pressure steam pipeline, 5 for first medium-pressure steam pipeline, 6 for first low-pressure steam condensate pipeline, 7 for low-pressure steam recovery pipeline, 8 for first medium-pressure steam condensate pipeline, 9 for medium-pressure steam recovery pipeline, 10 for first condensate collection pipeline, 11 for second condensate collection pipeline, 12 for second low-pressure steam pipeline, 13 for second medium-pressure steam pipeline, 14 for first low-pressure steam condensate branch pipe, 15 for first medium-pressure steam condensate branch pipe, 16 for second low-pressure steam condensate branch pipe, 17 for second medium-pressure steam condensate branch pipe, 18 for first level transmitter, 19 for second level transmitter, 20 for first regulating valve, and 21 for second regulating valve. Detailed Implementation
[0014] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.
[0015] Unless otherwise specified, all equipment and devices used in this invention are existing and commonly known in the art. For example, the first and second level transmitters are existing and commonly known devices.
[0016] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.
[0017] The present invention will be further described below with reference to the embodiments and accompanying drawings:
[0018] Example 1: As shown in the attached document Figure 1 As shown, the steam pipeline condensate collection device includes a low-pressure steam separator 1, a medium-pressure steam separator 2, a condensate collection tank 3, a first low-pressure steam pipeline 4, and a first medium-pressure steam pipeline 5. A first low-pressure steam condensate pipeline 6 is fixedly connected between the first low-pressure steam pipeline 4 and the upper inlet of the low-pressure steam separator 1. A low-pressure steam recovery pipeline 7 is fixedly connected between the first low-pressure steam pipeline 4 on the left side of the first low-pressure steam condensate pipeline 6 and the top outlet of the low-pressure steam separator 1. A first medium-pressure steam condensate pipeline 8 is fixedly connected between the first medium-pressure steam pipeline 5 and the upper inlet of the medium-pressure steam separator 2. A medium-pressure steam recovery pipeline 9 is fixedly connected between the first medium-pressure steam pipeline 5 on the left side of the first medium-pressure steam condensate pipeline 8 and the top outlet of the medium-pressure steam separator 2. A first condensate collection pipeline 10 is fixedly connected between the bottom outlet of the low-pressure steam separator 1 and the inlet of the condensate collection tank 3. A second condensate collection pipeline 11 is fixedly connected between the bottom outlet of the medium-pressure steam separator 2 and the first condensate collection pipeline 10.
[0019] In this invention, by adding a low-pressure steam separator 1, the condensate generated in the first low-pressure steam pipeline 4 is sent to the low-pressure steam separator 1 through the first low-pressure steam condensate pipeline 6. The steam at the top of the low-pressure steam separator 1 is recovered back to the first low-pressure steam pipeline 4 through the low-pressure steam recovery pipeline 7 for reuse. The low-pressure steam in the first low-pressure steam pipeline 4 is sent to the stripping tower of the subsequent polymerization workshop as a heat source. Similarly, by adding a medium-pressure steam separator 2, the condensate generated in the first medium-pressure steam pipeline 5 is sent to the medium-pressure steam separator 2 through the first medium-pressure steam condensate pipeline 8. The steam at the top of the medium-pressure steam separator 2 is sent back to the first medium-pressure steam pipeline 5 through the medium-pressure steam recovery pipeline 9. The medium-pressure steam in the first medium-pressure steam pipeline 5 is sent to the dry air heater of the subsequent polymerization workshop as a heat source.
[0020] This invention, through the addition of a low-pressure steam separator 1 and a medium-pressure steam separator 2, along with supporting pipelines, collects the condensate from low-pressure and medium-pressure steam that accumulates in the pipelines into the low-pressure steam separator 1 and the medium-pressure steam separator 2 for cascaded heat utilization. The waste heat (recovered steam) in the low-pressure steam separator 1 and the medium-pressure steam separator 2 is then recovered to the first low-pressure steam pipeline 4 and the first medium-pressure steam pipeline 5, making full use of surplus steam, effectively reducing steam loss, avoiding waste of condensate waste heat, and effectively solving the problem of heat loss and non-recovery of low-pressure steam condensate in the existing steam pipeline network of polymerization workshops.
[0021] After this utility model is put into use, the discharge of steam condensate is reduced by 0.7t / h, which, based on 8000h per year, saves 364,000 yuan per year.
[0022] The above-mentioned steam pipeline condensate collection device can be further optimized and / or improved according to actual needs:
[0023] Example 2: Its difference from Example 1 is as follows: (See attached) Figure 1 As shown, a number of first low-pressure steam condensate branch pipes 14 are fixedly connected between the first low-pressure steam recovery pipeline 7 and the first low-pressure steam condensate pipeline 6, and a number of first medium-pressure steam condensate branch pipes 15 are fixedly connected between the first medium-pressure steam pipeline 5 and the first medium-pressure steam condensate pipeline 8.
[0024] In this invention, by setting a first low-pressure steam condensate branch pipe 14 and a first medium-pressure steam condensate branch pipe 15, condensate at each location of the first low-pressure steam pipeline 14 and the first medium-pressure steam condensate branch pipe 15 can be collected, avoiding long-term accumulation in the pipeline that may corrode the inner wall of the pipeline and shorten the service life of the pipeline.
[0025] Example 3: Its difference from Examples 1 to 2 is as follows: (See attached) Figure 1 As shown, it also includes a second low-pressure steam pipeline 12 and a second medium-pressure steam pipeline 13. The second low-pressure steam pipeline 12 and the first low-pressure steam condensate pipeline 6 are fixedly connected by a second low-pressure steam condensate branch pipe 16. The second medium-pressure steam pipeline 13 and the first medium-pressure steam condensate pipeline 8 are fixedly connected by a second medium-pressure steam condensate branch pipe 17.
[0026] In this invention, the condensate in the second low-pressure steam pipeline 12 and the second medium-pressure steam pipeline 13 of the steam network can be sent to the low-pressure steam separator 1 and the medium-pressure steam separator 2 for steam-water separation, respectively, to realize the recovery and utilization of condensate heat. The low-pressure steam in the second low-pressure steam pipeline 12 and the medium-pressure steam in the second medium-pressure steam pipeline 13 are used as heat sources for other processes outside the polymerization workshop.
[0027] Example 4: Its difference from Examples 1 to 3 is as follows: (See attached) Figure 1 As shown, a first level transmitter 18 is fixedly installed on the low-pressure steam separator 1, and a first regulating valve 20 is provided on the first condensate collection pipeline 10 between the low-pressure steam separator 1 and the second condensate collection pipeline 11. A second level transmitter 19 is fixedly installed on the medium-pressure steam separator 2, and a second regulating valve 21 is provided on the second condensate collection pipeline 11. The first level transmitter 18 and the first regulating valve 20 are interlocked, and the second level transmitter 19 and the second regulating valve 21 are interlocked.
[0028] In this invention, when the condensate level in the low-pressure steam separator 1 reaches the upper limit detected by the first level transmitter 18, the first regulating valve 20 is interlocked and opened. The condensate in the low-pressure steam separator 1 is then temporarily stored in the condensate collection tank 3 via the first condensate collection pipeline 10. When the first level transmitter 18 detects that the condensate level in the low-pressure steam separator 1 is below the lower limit, the first regulating valve 20 is interlocked and closed. The interlocking control process of the second level transmitter 19 and the second regulating valve 21 installed on the medium-pressure steam separator 2 is similar. The second level transmitter 19 monitors the condensate level inside the medium-pressure steam separator 2 and interlocks and controls the opening and closing of the second regulating valve 21. This effectively improves the automation of the device, making operation efficient and convenient, while also preventing personnel burns caused by the discharge of steam condensate.
[0029] Example 5: It differs from Examples 1 to 4 in that: as shown in the appendix Figure 1As shown, both the first level transmitter 18 and the second level transmitter 19 are differential pressure level transmitters. The high-pressure side interface of the first level transmitter 18 is connected to the upper interface of the low-pressure steam separator 1, and the low-pressure side of the first level transmitter 18 is connected to the lower interface of the low-pressure steam separator 1. The high-pressure side interface of the second level transmitter 19 is connected to the upper interface of the medium-pressure steam separator 2, and the low-pressure side of the second level transmitter 19 is connected to the lower interface of the medium-pressure steam separator 2.
[0030] Depending on the needs, the various pipelines and equipment of the steam network condensate collection device may also be equipped with conventional valves, thermometers, and pressure gauges that are known and commonly used in the field, according to production requirements.
[0031] The above technical features constitute the embodiments of this utility model, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.
[0032] The usage process of this utility model embodiment:
[0033] First, low-pressure steam is sent via the first low-pressure steam pipeline 4 to the stripping tower in the subsequent polymerization workshop as a heat source. The condensate in the first low-pressure steam pipeline 4 is sent via the first low-pressure steam condensate pipeline 6 or several first low-pressure steam condensate branch pipes 14 to the low-pressure steam separator 1 for steam-water separation. The low-pressure steam in the second low-pressure steam pipeline 12 is sent to the outside of the polymerization workshop as a heat source for other processes. The condensate in the second low-pressure steam pipeline 12 is sent via the second low-pressure steam condensate branch pipe 16 and the first low-pressure steam condensate pipeline 6 to the low-pressure steam separator 1 for steam-water separation. The preheated (excess steam) in the low-pressure steam separator 1 is sent via the low-pressure steam recovery pipeline 7 back to the first low-pressure steam pipeline 4 for reuse. The condensate in the low-pressure steam separator 1 is detected by the first level transmitter 18. When the first level transmitter 18 detects that the condensate in the low-pressure steam separator 1 has reached the upper limit, the first regulating valve 20 is interlocked and opened, and the condensate in the low-pressure steam separator 1 is sent to the condensate collection tank 3 for temporary storage. When the first level transmitter 18 detects that the liquid level in the low-pressure steam separator 1 has reached the lower limit, the first regulating valve 20 is interlocked and closed.
[0034] Similarly, the medium-pressure steam is sent through the first medium-pressure steam pipeline 5 to the dry air heater in the subsequent polymerization workshop as a heat source, and the condensate in the first medium-pressure steam pipeline 5 is sent through the first medium-pressure steam condensate pipeline 8 or several first medium-pressure steam condensate branch pipes 15 to the medium-pressure steam separator 2 for steam-water separation. The medium-pressure steam in the second medium-pressure steam pipeline 13 is sent to the outside of the polymerization workshop as a heat source for other processes. The condensate in the second medium-pressure steam pipeline 13 is sent to the medium-pressure steam separator 2 for steam-water separation through the second medium-pressure steam condensate branch pipe 17 and the first medium-pressure steam condensate pipeline 8. The waste heat (excess steam) in the medium-pressure steam separator 2 is sent to the first medium-pressure steam pipeline 5 for reuse through the medium-pressure steam recovery pipeline 9. The condensate in the medium-pressure steam separator 2 is detected by the second level transmitter 19. When the second level transmitter 19 detects that the condensate in the medium-pressure steam separator 2 has reached the upper limit, it interlocks and opens the second regulating valve 21. The condensate in the medium-pressure steam separator 2 is sent to the condensate collection tank 3 for temporary storage. When the second level transmitter 19 detects that the liquid level in the medium-pressure steam separator 2 has reached the lower limit, it interlocks and closes the second regulating valve 21.
Claims
1. A steam pipeline condensate collection device, characterized in that... The system includes a low-pressure steam separator, a medium-pressure steam separator, a condensate collection tank, a first low-pressure steam pipeline, and a first medium-pressure steam pipeline. A first low-pressure steam condensate pipeline is fixedly connected between the first low-pressure steam pipeline and the upper inlet of the low-pressure steam separator. A low-pressure steam recovery pipeline is fixedly connected between the first low-pressure steam pipeline to the left of the first low-pressure steam condensate pipeline and the top outlet of the low-pressure steam separator. A first medium-pressure steam condensate pipeline is fixedly connected between the first medium-pressure steam pipeline to the left of the first medium-pressure steam condensate pipeline and the top outlet of the medium-pressure steam separator. A first condensate collection pipeline is fixedly connected between the bottom outlet of the low-pressure steam separator and the inlet of the condensate collection tank. A second condensate collection pipeline is fixedly connected between the bottom outlet of the medium-pressure steam separator and the first condensate collection pipeline.
2. The steam pipeline condensate collection device according to claim 1, characterized in that... A number of first low-pressure steam condensate branch pipes are fixedly connected between the first low-pressure steam pipeline and the first low-pressure steam condensate pipeline. A number of first medium-pressure steam condensate branch pipes are fixedly connected between the first medium-pressure steam pipeline and the first medium-pressure steam condensate pipeline.
3. The steam pipeline condensate collection device according to claim 1 or 2, characterized in that... It also includes a second low-pressure steam pipeline and a second medium-pressure steam pipeline. The second low-pressure steam pipeline is fixedly connected to the first low-pressure steam condensate pipeline by a second low-pressure steam condensate branch pipe, and the second medium-pressure steam pipeline is fixedly connected to the first medium-pressure steam condensate pipeline by a second medium-pressure steam condensate branch pipe.
4. The steam pipeline condensate collection device according to claim 1 or 2, characterized in that... A first level transmitter is fixedly installed on the low-pressure steam separator. A first regulating valve is provided on the first condensate collection pipeline between the low-pressure steam separator and the second condensate collection pipeline. A second level transmitter is fixedly installed on the medium-pressure steam separator. A second regulating valve is provided on the second condensate collection pipeline. The first level transmitter and the first regulating valve are interlocked. The second level transmitter and the second regulating valve are also interlocked.
5. The steam pipeline condensate collection device according to claim 3, characterized in that... A first level transmitter is fixedly installed on the low-pressure steam separator. A first regulating valve is provided on the first condensate collection pipeline between the low-pressure steam separator and the second condensate collection pipeline. A second level transmitter is fixedly installed on the medium-pressure steam separator. A second regulating valve is provided on the second condensate collection pipeline. The first level transmitter and the first regulating valve are interlocked. The second level transmitter and the second regulating valve are also interlocked.
6. The steam pipeline condensate collection device according to claim 4, characterized in that... Both the first and second level transmitters are differential pressure level transmitters. The high-pressure side interface of the first level transmitter is connected to the upper interface of the low-pressure steam separator, and the low-pressure side of the first level transmitter is connected to the lower interface of the low-pressure steam separator. The high-pressure side interface of the second level transmitter is connected to the upper interface of the medium-pressure steam separator, and the low-pressure side of the second level transmitter is connected to the lower interface of the medium-pressure steam separator.
7. The steam pipeline condensate collection device according to claim 5, characterized in that... Both the first and second level transmitters are differential pressure level transmitters. The high-pressure side interface of the first level transmitter is connected to the upper interface of the low-pressure steam separator, and the low-pressure side of the first level transmitter is connected to the lower interface of the low-pressure steam separator. The high-pressure side interface of the second level transmitter is connected to the upper interface of the medium-pressure steam separator, and the low-pressure side of the second level transmitter is connected to the lower interface of the medium-pressure steam separator.