Annular steam pipeline steam distribution structure

Abstract

The utility model relates to the technical field of steam conveying, in particular to a steam distributing structure of an annular steam pipeline, and aims to solve the problems that in the steam conveying process of a factory at present, most existing steam pipeline structures are branch-shaped, one pipeline is provided with a plurality of steam users, the steam consumption of each user is extremely unstable, and the steam consumption of upstream users is often increased, so that the steam is wasted. The steam pressure fluctuation of downstream users is large, and the steam pressure balance cannot be kept. According to the steam distribution structure, the pressure change of the second-stage annular steam pipeline is found through the pressure gauge, steam is supplemented through the electric gate valve, the pressure of the second-stage annular steam pipeline is stabilized, and flexible adjustment of zoning and pressure distribution is achieved; and the load of the peak regulation boiler is adjusted through the first-stage annular main steam pipeline pressure gauge, so that the pressure of the first-stage annular main steam pipeline is stabilized, the phenomenon that the steam consumption pressure of downstream users of branch pipelines is sharply reduced when the steam consumption amount of the users is greatly changed is prevented, the no-load rate and the heat supply conveying loss of a heat supply pipe network are reduced, and safe and efficient operation of the heat supply pipe network is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of steam transportation, and particularly relates to a steam distribution structure for an annular steam pipeline. Background Art

[0002] Steam pipelines are used to transport steam in industry. Steam is transported from a heat source to multiple users. The existing steam pipeline structure is a branched structure. One pipeline serves multiple steam users. The steam consumption of each user is unstable. Often, after the upstream user increases the steam consumption, the steam pressure of the downstream user fluctuates greatly, and the steam pressure balance cannot be maintained. Another is to install a large steam distribution cylinder, but the steam distribution cylinder is restricted by the on-site planar space position, which is not conducive to the transformation of old industrial parks. The branched steam pipelines adopted in existing industrial parks include a boiler, a main road, and four steam user branch roads each. One end of each of the four branch roads is respectively connected to the main road, and double-sided hard-sealed butterfly valves are installed on the branch roads. When in use, when the steam consumption of one branch road in the branch suddenly increases, the steam pressure of the downstream branch road drops suddenly. When one branch road in the branch suddenly stops using steam, the pressure of the main road 4 increases, and the boiler load needs to be adjusted separately in a timely manner, which increases the operation difficulty of the boiler and reduces the overall efficiency of steam transportation. Content of the Utility Model

[0003] The utility model provides a steam distribution structure for an annular steam pipeline to solve the problems existing in the above background.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] A steam distribution structure for an annular steam pipeline includes a first-level annular main steam pipeline, a second-level annular steam pipeline, multiple waste heat boiler parallel steam branch pipelines, a peak-shaving boiler parallel steam branch pipeline, and multiple first user steam consumption branch pipelines located above the first-level annulus, and multiple second user steam consumption branch pipelines located above the second-level annulus. One end of each of the waste heat boiler parallel steam branch pipelines, the peak-shaving boiler parallel steam branch pipeline, and the first user steam consumption branch pipelines is connected and arranged on the first-level annular main steam pipeline, and one end of each of the second user steam consumption branch pipelines is connected and arranged on the second-level annular steam pipeline.

[0006] Further, the first-level annular main steam pipeline and the second-level annular steam pipeline are connected and arranged through a connecting pipeline, and an electric control double-sided sealed gate valve is arranged on the connecting pipeline.

[0007] Further, a pressure gauge is arranged on the second-level annular steam pipeline, and the pressure gauge is connected to the electric control double-sided sealed gate valve.

[0008] Further, a pressure gauge is arranged on the first-level annular main steam pipeline, and the pressure gauge is connected to the peak-shaving boiler.

[0009] Further, double-sided hard-sealed butterfly valves are provided on the parallel steam branch pipes of the waste heat boiler, the parallel steam branch pipes of the peak-shaving boiler, the steam supply branch pipes for the first user, and the steam supply branch pipes for the second user, and the double-sided hard-sealed butterfly valves are arranged close to the sides of the first-stage annular main steam pipe and the second-stage annular steam pipe.

[0010] The utility model has the following beneficial effects:

[0011] A steam distribution structure of an annular steam pipe provided by the utility model, through the annular steam pipe structure, prevents the phenomenon that when the steam consumption of users changes greatly, the steam supply pressure of downstream users in the branch pipe drops sharply, affecting the production process. The annular steam pipe can stabilize the steam transmission pressure at the front end of the users and reduce the floor area occupied by installing a steam header; the pressure change of the second-stage annular steam pipe can be detected in time through a pressure gauge, and the pressure automatic control electric gate valve is used to supplement steam in time and stabilize the pressure of the second-stage annular network steam pipe, realizing flexible adjustment by region, pressure, household and season; and through the pressure gauge of the first-stage annular main steam pipe, the load of the peak-shaving boiler is adjusted in time, the first-stage annular main steam pipe is stabilized at a stable operating pressure, gradually reducing the no-load rate, self-consumption rate and transmission loss of the heat supply network, ensuring the safe, economic, efficient and reliable operation of the heat supply network, and solving the problem that in the process of steam transmission in the factory area at present, due to the existing steam pipe structure mostly being a branch structure, one pipe serves multiple steam users, and the steam consumption of each user is extremely unstable. After the upstream user increases the steam consumption, the steam pressure of the downstream user fluctuates greatly and the steam pressure balance cannot be maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] The meanings of the reference numerals are as follows:

[0014] 1. First-stage annular main steam pipe; 2. Second-stage annular steam pipe; 3. Parallel steam branch pipe of waste heat boiler; 4. Parallel steam branch pipe of peak-shaving boiler; 5. Steam supply branch pipe for the first user; 6. Steam supply branch pipe for the second user; 7. Connecting pipe; 8. Electrically controlled double-sided sealed gate valve; 9. First pressure gauge; 10. Second pressure gauge; 11. Peak-shaving boiler; 12. Double-sided hard-sealed butterfly valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The present utility model will be further described below with reference to the drawings and specific embodiments.

[0016] As Figure 1As shown in the figure, a steam distribution structure for a ring-shaped steam pipeline includes a primary ring-shaped main steam pipeline 1, a secondary ring-shaped steam pipeline 2, multiple parallel steam inlet branch pipelines 3 for waste heat boilers, a parallel steam inlet branch pipeline 4 for peak-shaving boilers, multiple first user steam extraction branch pipes 5 located above the primary ring, and multiple second user steam extraction branch pipes 6 located above the secondary ring. One end of each of the parallel steam inlet branch pipelines 3 for waste heat boilers, the parallel steam inlet branch pipeline 4 for peak-shaving boilers, and the first user steam extraction branch pipes 5 is connected and arranged on the primary ring-shaped main steam pipeline 1, and one end of each of the second user steam extraction branch pipes 6 is connected and arranged on the secondary ring-shaped steam pipeline 2.

[0017] The primary ring-shaped main steam pipeline 1 and the secondary ring-shaped steam pipeline 2 are connected and arranged through a connecting pipeline 7, and an electric control double-sided sealed gate valve 8 is arranged on the connecting pipeline 7.

[0018] A pressure gauge 9 is arranged on the secondary ring-shaped steam pipeline 2, and the pressure gauge 9 is connected to the electric control double-sided sealed gate valve 8.

[0019] A pressure gauge 10 is arranged on the primary ring-shaped main steam pipeline 1, and the pressure gauge 10 is connected to the peak-shaving boiler 11.

[0020] Double-sided hard-sealed butterfly valves 12 are arranged on each of the parallel steam inlet branch pipelines 3 for waste heat boilers, the parallel steam inlet branch pipeline 4 for peak-shaving boilers, the first user steam extraction branch pipes 5, and the second user steam extraction branch pipes 6, and the double-sided hard-sealed butterfly valves 12 are arranged close to the side parts of the primary ring-shaped main steam pipeline 1 and the secondary ring-shaped steam pipeline 2.

[0021] When the present utility model is specifically applied and steam passes through the first user steam branch pipe 5 and the second user steam branch pipe 6 where some steam users have no requirement for steam moisture content and the branch pipeline is short, the condensate water in the primary annular main steam pipe 1 and the secondary annular steam pipe 2 flows into the user production process system along the first user steam branch pipe 5 and the second user steam branch pipe 6 through the steam extraction point at the bottom of the pipeline, reducing the external discharge of condensate water and increasing the energy utilization rate. The pressure gauge 9 installed on the secondary annular steam pipe 2 is used to detect whether there are large fluctuations in the operating pressure of the secondary annular steam pipe 2. When the reading of the pressure gauge 9 is lower than the set pressure value, the pressure gauge 9 gives a controller signal to the electric control double-sided sealed gate valve 8, causing the controller to open the electric control double-sided sealed gate valve 8. When the reading of the pressure gauge 9 is higher than the set pressure value, the pressure gauge 9 gives a controller signal to the electric control double-sided sealed gate valve 8, causing the controller to close the electric control double-sided sealed gate valve 8, so as to stabilize and balance the pressure of the secondary annular steam pipe 2 and ensure the smoothness of the user steam pressure. The pressure gauge 10 installed on the primary annular main steam pipe 1 is used to detect the operating pressure of the primary annular main steam pipe 1. When the reading of the pressure gauge 10 is lower than the set pressure value, the peak shaving boiler 11 increases the operating load. When the reading of the pressure gauge 10 is higher than the set pressure value, the peak shaving boiler 11 reduces the operating load. The operating pressure of the primary annular main steam pipe 1 only needs to be adjusted by the peak shaving boiler 11, and other waste heat boilers do not need to be adjusted according to the pressure of the primary annular main steam pipe 1, which is beneficial to the flexible adjustment of the waste heat boilers and is not restricted by the external main steam pipe pressure, effectively ensuring the balance of the conveyed steam pressure.

Claims

1. A steam separation structure for an annular steam pipeline, characterized in that: The invention comprises a primary annular main steam pipeline (1), a secondary annular steam pipeline (2), a plurality of waste heat boiler steam branch pipelines (3), a peak shaving boiler steam branch pipeline (4), a plurality of first user steam branch pipes (5) located at the upper part of the primary annular shape, and a plurality of second user steam branch pipes (6) located at the upper part of the secondary annular shape, and is characterized in that one end of the waste heat boiler steam branch pipeline (3), the peak shaving boiler steam branch pipeline (4) and the first user steam branch pipe (5) are all connected and arranged on the primary annular main steam pipeline (1), and one end of the second user steam branch pipe (6) is all connected and arranged on the secondary annular steam pipeline (2).

2. The annular steam pipe steam separation structure according to claim 1 is characterized in that: The primary annular main steam pipeline (1) and the secondary annular steam pipeline (2) are connected via a connecting pipeline (7), and an electrically controlled double-sided sealing gate valve (8) is provided on the connecting pipeline (7).

3. The annular steam pipe steam separation structure according to claim 2 is characterized in that: The secondary annular steam pipeline (2) is provided with a pressure gauge (9), and the pressure gauge (9) is connected to the electrically controlled double-sided sealing gate valve (8).

4. The annular steam pipe steam separation structure according to claim 2 is characterized in that: The primary annular main steam pipeline (1) is provided with a pressure gauge (10), and the pressure gauge (10) is connected to the peak-shaving boiler (11).

5. The annular steam pipe steam separation structure according to claim 1 is characterized in that: The waste heat boiler steam branch pipeline (3), the peak load boiler steam branch pipeline (4), the first user steam branch pipeline (5) and the second user steam branch pipeline (6) are all provided with double-sided hard-sealed butterfly valves (12), and the double-sided hard-sealed butterfly valves (12) are arranged close to the sides of the primary annular main steam pipeline (1) and the secondary annular steam pipeline (2).

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