Temperature adjusting device for segmented water supply

Abstract

The utility model discloses a temperature adjusting device adopting segmented water supply. The temperature adjusting device comprises a first stop valve set, a second stop valve set, a third stop valve set, a three-way adjusting valve set, a connecting pipeline and a water supply adjusting valve set. According to the adjusting device for segmented water supply, two adjusting valves are arranged, one adjusting valve is located on a water supply operation table, and a water supply adjusting valve set is arranged so as to adapt to the adaptability of the boiler to different loads; and the three-way regulating valve group is arranged at the inlet of the water supply air heater, so that reasonable hot air temperature is obtained by controlling flow. The water supply regulating valve group and the three-way regulating valve group have a mutual synergistic effect, the hot air temperature and the smoke exhaust temperature are jointly regulated through the inlet temperature and the flow, the adaptability of the boiler to different loads is improved, and the efficiency of the boiler is improved.

Description

Technical Field

[0001] The present application belongs to the field of thermal energy engineering technology, and in particular relates to a temperature control device for segmented water supply. Background Art

[0002] In the design and operation of modern industrial boilers, low-temperature corrosion is one of the factors that affect the performance and life of air preheaters. In order to effectively alleviate this problem, the industry has widely adopted the innovative technical strategy of external feedwater air heaters. This technology significantly increases the air temperature entering the air preheater by adding a special feedwater heating device to the boiler system, thereby effectively suppressing the metal corrosion caused by low temperature. In addition, by accurately controlling the feedwater flow rate, the system also achieves flexible control of the furnace combustion air temperature, further optimizing the combustion efficiency and boiler operation stability.

[0003] However, with the introduction of external feedwater air heaters, the overall layout of the boiler's steam-water system has encountered challenges. This introduction not only increases the complexity of the system, but also changes the operating procedures and adjustment mechanisms of the feedwater system. Specifically, the distribution and adjustment methods of feedwater flow before and after the feedwater station and before and after the economizer have changed significantly, which has put forward higher requirements on the technical requirements of boiler operators and the automation level of the system. At the same time, how to further take into account the precise control of exhaust gas temperature on the basis of meeting the demand for feedwater heating air has become an important issue that needs to be solved in the current field of boiler design and optimization. Utility Model Content

[0004] The utility model provides a temperature regulating device using segmented water supply, which can adjust the hot air temperature and the exhaust smoke temperature, so that the arrangement of the steam-water system can not only meet the demand for water supply to heat the air, but also take into account the regulation of the exhaust smoke temperature.

[0005] In order to achieve the above application purpose, the technical solution adopted in this application is as follows:

[0006] The embodiment of the present application provides a temperature control device using segmented water supply, comprising: a first stop valve group, a second stop valve group, a third stop valve group, a three-way regulating valve group, a connecting pipeline, and a water supply regulating valve group;

[0007] One end of the first stop valve group and one end of the second stop valve group are connected to the water supply operation table, the other end of the first stop valve group is connected to the low-temperature economizer inlet header, and the other end of the second stop valve group is connected to the low-temperature economizer outlet header;

[0008] The mixing header is connected to the low-temperature economizer outlet header and the first stop valve of the three-way regulating valve group, the second stop valve of the three-way regulating valve group is connected to the feedwater air heater inlet header, the feedwater air heater outlet header is connected to the third stop valve group, and the third stop valve group is also connected to the high-temperature economizer inlet header;

[0009] The three-way regulating valve of the three-way regulating valve group is connected to the middle of the third stop valve group through a connecting pipe, and a feed water regulating valve group is provided on the feed water operation platform.

[0010] Optionally, the first stop valve group, the second stop valve group, and the third stop valve group each include two stop valves connected in series.

[0011] Optionally, the three-way regulating valve group includes a first stop valve, a three-way regulating valve, and a second stop valve arranged in sequence according to the medium flow direction.

[0012] Optionally, there are two sets of feed water regulating valve groups, and the two sets of feed water regulating valve groups are connected in parallel.

[0013] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0014] A temperature regulating device using segmented feed water provided by the embodiments of the present application only has two sets of regulating valve groups: one is located on the feed water operation platform and is provided with a feed water regulating valve group to adapt to the load adaptability of the boiler; the other is located at the inlet of the feed water air heater and is provided with a three-way regulating valve group to obtain a reasonable hot air temperature through flow control. The above-mentioned feed water regulating valve group and three-way regulating valve group cooperate with each other, and jointly regulate the hot air temperature and the exhaust gas temperature through the inlet temperature and flow rate, improving the load adaptability of the boiler and increasing the boiler efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0016] Figure 1 Shows a schematic structural diagram of a temperature regulating device with segmented feed water provided by the embodiments of the present application.

[0017] Illustration:

[0018] 1. First stop valve group; 2. Second stop valve group; 3. Three-way regulating valve group; 4. Third stop valve group; 5. Connecting pipe; 6. Feed water operation platform; 7. Low-temperature economizer inlet header; 8. Low-temperature economizer outlet header; 9. Mixing header; 10. High-temperature economizer inlet header; 11. High-temperature economizer outlet header; 12. Feed water air heater inlet header; 13. Feed water air heater outlet header; 14. Feed water regulating valve group. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clear and understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0021] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0022] In order to illustrate the technical solutions described in the present application, the following will be described by means of specific embodiments.

[0023] Please refer to Figure 1 As shown, the embodiment of the present application provides a temperature regulating device using segmented water supply, including a first stop valve group 1, a second stop valve group 2, a third stop valve group 4, a three-way regulating valve group 3, and a connecting pipe 5 between the valve groups.

[0024] The first stop valve group 1, the second stop valve group 2, and the third stop valve group 4 each include two stop valves connected in series. The three-way regulating valve group 3 arranges a first stop valve, a three-way regulating valve, and a second stop valve in sequence according to the medium flow direction.

[0025] Specifically, one end of the first stop valve group 1 and one end of the second stop valve group 2 are jointly connected to a water supply operation table 6, the other end of the first stop valve group 1 is connected to the inlet header 7 of the low-temperature economizer, and the other end of the second stop valve group 2 is connected to the outlet header 8 of the low-temperature economizer. The mixing header 9 is connected to the outlet header 8 of the low-temperature economizer and the first stop valve of the three-way regulating valve group 3. The second stop valve of the three-way regulating valve group 3 is connected to the inlet header 12 of the feed water air heater, the outlet header 13 of the feed water air heater is connected to the third stop valve group 4, and the third stop valve group 4 is also connected to the inlet header 10 of the high-temperature economizer. The three-way regulating valve of the three-way regulating valve group 3 is connected to the middle of the third stop valve group 4 through the connecting pipe 5. The water supply operation table 6 is also provided with a water supply regulating valve group 14.

[0026] The working principle of the above temperature regulating device using segmented water supply is as follows:

[0027] The fluid medium of the first shut-off valve group 1 and the second shut-off valve group 2 is the feed water from behind the feed water operation console 6. One path of the feed water directly enters the inlet header 7 of the low-temperature economizer through the first shut-off valve group 1. Another path of the feed water enters the outlet header 8 of the low-temperature economizer through the second shut-off valve group 2. After being mixed with the medium heated by the first shut-off valve group 1 and the low-temperature economizer, it enters the three-way regulating valve group 3 through the mixing header 9, and then is cooled by heating the air through the feed water heater (i.e., passing through the inlet header 12 and the outlet header 13 of the feed water air heater), and then is led out by the third shut-off valve group 4 and led out through the high-temperature economizer (i.e., passing through the inlet header 10 and the outlet header 11 of the high-temperature economizer).

[0028] For the above temperature regulating device using segmented feed water, the feed water from the feed water operation console 6 is divided into two paths and enters the low-temperature economizer at two positions with different working medium temperatures. After being evenly mixed in the mixing header 9, it enters the feed water air heater through the three-way regulating valve group 3. The flow rate of the working medium entering the feed water air heater is controlled by the three-way regulating valve to control the hot air temperature.

[0029] In other words, the above adjustment device for segmented feed water has two regulating valves: one is located at the feed water operation console 6, and the feed water regulating valve group 14 is set to adapt to the load adaptability of the boiler; the other is located at the inlet of the feed water air heater, and the three-way regulating valve group 3 is set to obtain a reasonable hot air temperature by controlling the flow rate. The above feed water regulating valve group 14 and the three-way regulating valve group 3 cooperate with each other to jointly regulate the hot air temperature and the flue gas temperature through the inlet temperature and the flow rate.

[0030] The temperature regulating device using segmented feed water provided by the embodiment of the present application adopts a temperature regulating method of segmented feed water. By introducing the feed water into the economizer in segments, then flowing through the feed water air heater, and rectifying and converging again by adjusting the valve opening, the hot air outlet temperature and the flue gas outlet temperature are adjusted, the load adaptability of the boiler is improved, and the boiler efficiency is increased.

[0031] The above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A temperature control device using segmented water supply, characterized in that: include: A first stop valve group, a second stop valve group, a third stop valve group, a three-way regulating valve group, a connecting pipeline, and a water supply regulating valve group; One end of the first stop valve group and one end of the second stop valve group are connected to the water supply operation table, the other end of the first stop valve group is connected to the low-temperature economizer inlet header, and the other end of the second stop valve group is connected to the low-temperature economizer outlet header; The mixing header is connected to the low-temperature economizer outlet header and the first stop valve of the three-way regulating valve group, the second stop valve of the three-way regulating valve group is connected to the feedwater air heater inlet header, the feedwater air heater outlet header is connected to the third stop valve group, and the third stop valve group is also connected to the high-temperature economizer inlet header; The three-way regulating valve of the three-way regulating valve group is connected to the middle of the third stop valve group through the connecting pipeline, and the water supply regulating valve group is provided on the water supply operating table.

2. The temperature control device using segmented water supply according to claim 1 is characterized in that: The first stop valve group, the second stop valve group and the third stop valve group each include two stop valves connected in series.

3. The temperature control device using segmented water supply according to claim 1 is characterized in that: The three-way regulating valve group includes the first stop valve, the three-way regulating valve, and the second stop valve which are arranged in sequence according to the flow direction of the medium.

4. The temperature control device using segmented water supply according to claim 1 is characterized in that: The water supply regulating valve groups are provided with two groups, and the two groups of water supply regulating valve groups are connected in parallel.

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