Multi-user pipeline route layout method capable of greatly reducing pressure loss of long-distance steam pipeline

Abstract

The invention discloses a multi-user pipeline route layout method capable of greatly reducing pressure loss of a long-distance steam pipeline. A universal scientific and reasonable economic design method is provided for early-stage line selection of a long-distance pipeline route. The overall conception of the invention is as follows: the gravity center point of a steam conveying heat source A position point and N long-distance steam conveying user position points which are not in the same direction is the closest point to the above points, so that the gravity center point is used as a bifurcation point of a steam conveying main pipeline and a first-stage steam conveying branch pipeline; therefore, the sum of pipelines among a single heat source and multiple users is the shortest, and the purpose of the minimum pressure loss of the pipelines is achieved by only arranging one-stage steam conveying branch pipelines. According to the method, through the two-dimensional coordinate system and the universal calculation formula, the multi-point user branch point coordinates are conveniently obtained, and design by designers is facilitated.

Description

Technical Field

[0001] This invention relates to a method for selecting and laying out a long-distance heat transmission pipeline for multiple users, and particularly to a method for laying out a long-distance heat transmission pipeline for multiple users whose heat is supplied by the same heat source and whose users are not on a straight line. Background Technology

[0002] In the routing design of long-distance steam transmission pipelines, it is common to encounter a situation where there is a single steam heating source and multiple heat users, scattered over long distances in various directions. Current design methods for this situation rely on rudimentary methods such as on-site surveys and individual user measurements to preliminarily determine the routes of the main pipeline and its branches. During route selection, the primary considerations are objective obstacles and the total length of the pipeline, without theoretical scientific calculations. This crude design approach often leads to high pipeline costs and uneconomical branch point selection. To overcome these shortcomings, some design institutes have begun to adopt a hierarchical method for determining the centroid of adjacent users. The following is a detailed explanation of this method using a single heat source and three heat users as an example: First, connect the locations of the second and third heat users with a straight line. Determine the virtual load centroid of the second and third heat users along this line. Then, connect this virtual load centroid with the first heat user... Using the location and heat source location as the three vertices of a triangle, the centroid of this triangle is identified as the first branch point of the transmission pipeline. Then, using the first branch point, the second heat user, and the third heat user as the three vertices of a second triangle, the centroid of this second triangle is identified as the second branch point. This second branch point is then connected to the second and third heat users respectively, forming a secondary branch. Finally, the second branch point is connected to the first branch point, forming a primary branch. If there are more than three heat users, the number of branch levels increases with the number of users. This increase in the number of branch levels leads to a decrease in pressure in the steam transmission pipeline, severely affecting the steam production and use by users. This renders the above-mentioned steam pipeline routing method unusable in practical engineering. Therefore, inventing a universal pipeline routing method with only one branch point, where each user is located on a primary branch pipeline, achieving both economic efficiency and overcoming significant pressure attenuation, has become a pressing problem that needs to be solved. Summary of the Invention

[0003] This invention provides a multi-user pipeline routing method that can significantly reduce pressure loss in long-distance steam pipelines, and offers a general, scientific, reasonable, and economical design method for the initial route selection of long-distance pipelines.

[0004] The present invention solves the above technical problems through the following technical solutions: A method for laying out a multi-user pipeline route that can significantly reduce pressure loss in long-distance steam pipelines includes a steam transmission heat source A and N long-distance steam transmission users that are not in the same direction, characterized by the following steps: Step 1: Establish an XY plane coordinate system, with the X-axis as the horizontal coordinate axis and the Y-axis as the vertical coordinate axis. Place the steam heat source A and N long-distance steam users in the first quadrant of the XY plane coordinate system, and obtain the position coordinates (X1, Y1) of the steam heat source A and the position coordinates (XN, YN) of the Nth long-distance steam user, where N = 2, 3, 4, ... The second step is to set the branch point between the main steam transmission pipeline and each primary branch of steam transmission pipeline as O, and set the coordinates of the branch point O in the first quadrant of the XY plane coordinate system as (X0, Y0). Step 3: Calculate the coordinate values ​​of X0 and Y0 using the following formulas: X0=(X1+ X2+ … + XN) / N; Y0=(Y1+ Y2+ … + YN) / N; Thus, the coordinates of the bifurcation point O in the first quadrant are (X0, Y0); Step 4: Connect the location coordinates (X1, Y1) of the steam heat source A with the location coordinates (X0, Y0) of the branch point O. This connection line serves as the main steam pipeline. Connect the location coordinates (X0, Y0) of the branch point O with the coordinates (XN, YN) of each long-distance steam user to obtain the first-level steam branch pipeline from the branch point O to each user. This completes the layout design of the multi-user pipeline route.

[0005] The length of the main steam pipeline obtained in step four is corrected by multiplying the length of the main steam pipeline by the weight correction factor per unit length of the main steam pipeline; the length of the primary steam pipeline for each user obtained in step four is also corrected by multiplying the length of the primary steam pipeline for each user by the weight correction factor per unit length of the primary steam pipeline.

[0006] This invention overcomes the drawback of high pressure loss caused by multiple-stage steam branch pipes in traditional long-distance steam transmission pipelines due to multiple users by setting only one pipeline branch node on the main steam transmission pipeline. At the same time, it achieves a shorter total pipeline length, thereby reducing the pipeline layout cost. This provides a simple, easy-to-operate, and economical design method for design institutes to conduct preliminary design of pipeline routes. Attached Figure Description

[0007] Figure 1 This is a schematic diagram showing the pipeline routing when there are two heat users according to the present invention. Detailed Implementation

[0008] The present invention will now be described in detail with reference to the accompanying drawings: A method for laying out a multi-user pipeline route that can significantly reduce pressure loss in long-distance steam pipelines includes a steam transmission heat source A and N long-distance steam transmission users that are not in the same direction, characterized by the following steps: Step 1: Establish an XY plane coordinate system, with the X-axis as the horizontal coordinate axis and the Y-axis as the vertical coordinate axis. Place the steam heat source A and N long-distance steam users in the first quadrant of the XY plane coordinate system, and obtain the position coordinates (X1, Y1) of the steam heat source A and the position coordinates (X1, Y1) of the Nth long-distance steam user. N ,Y N ), where N = 2, 3, 4, ...; The second step is to set the branch point between the main steam transmission pipeline and each primary branch of steam transmission pipeline as O, and set the coordinates of the branch point O in the first quadrant of the XY plane coordinate system as (X0, Y0). Step 3: Calculate the coordinate values ​​of X0 and Y0 using the following formulas: X0 = (X1 + X2 + … + X) N ) / N; Y0 = (Y1 + Y2 + … + Y) N ) / N; Thus, the coordinates of the bifurcation point O in the first quadrant are (X0, Y0); Step 4: Connect the location coordinates (X1, Y1) of the steam heat source A with the location coordinates (X0, Y0) of the branch point O. This connecting line serves as the main steam pipeline. Connect the location coordinates (X0, Y0) of the branch point O with the coordinates (X1, Y1) of each long-distance steam user. N ,Y N The system connects the points to obtain the primary steam transmission branch pipelines from the branch point O to each user, thus completing the layout design of the multi-user pipeline. The overall concept of this invention is to take the centroid of the steam transmission heat source A and the N long-distance steam transmission user locations that are not in the same direction as the centroid, since this centroid is the closest point to each of the above points, and use this centroid as the branch point of the main steam transmission pipeline and the primary steam transmission branch pipeline. This achieves the shortest total pipeline length between a single heat source and multiple users, and by setting only the primary steam transmission branch pipeline, the goal of minimizing pipeline pressure loss is achieved. This invention uses a two-dimensional coordinate system and a universal calculation formula to conveniently obtain the coordinates of the branch points of multiple users, which is convenient for designers.

[0009] The length of the main steam pipeline obtained in step four is corrected by multiplying it by the weight correction factor per unit length of the main steam pipeline. The length of the primary steam pipeline for each user obtained in step four is also corrected by multiplying it by the weight correction factor per unit length of the primary steam pipeline for each user. The weight correction factor per unit length of the pipeline needs to be derived based on factors such as pressure drop, temperature drop, and strength of the pipeline.

Claims

1. A method for laying out a multi-user pipeline route that can significantly reduce pressure loss in long-distance steam pipelines, comprising a steam transmission heat source A and N long-distance steam transmission users not in the same direction, characterized by the following steps: Step 1: Establish an XY plane coordinate system, with the X-axis as the horizontal coordinate axis and the Y-axis as the vertical coordinate axis. Place the steam heat source A and N long-distance steam users in the first quadrant of the XY plane coordinate system, and obtain the position coordinates (X1, Y1) of the steam heat source A and the position coordinates (X1, Y1) of the Nth long-distance steam user. N ,Y N ), where N = 2, 3, 4, ...; The second step is to set the branch point between the main steam transmission pipeline and each primary branch of steam transmission pipeline as O, and set the coordinates of the branch point O in the first quadrant of the XY plane coordinate system as (X0, Y0). Step 3: Calculate the coordinate values ​​of X0 and Y0 using the following formulas: X0=(X1+ X2+ … + X N ) / N: Y0=(Y1+ Y2+ … + Y N ) / N; Thus, the coordinates of the bifurcation point O in the first quadrant are (X0, Y0); Step 4: Connect the location coordinates (X1, Y1) of the steam heat source A with the location coordinates (X0, Y0) of the branch point O. This connecting line serves as the main steam pipeline. Connect the location coordinates (X0, Y0) of the branch point O with the coordinates (X1, Y1) of each long-distance steam user. N ,Y N The connection is made to obtain the primary steam transmission branch pipeline from the branch point O to each user; thus completing the layout design of the multi-user pipeline route.

2. The multi-user pipeline routing method according to claim 1, which can significantly reduce pressure loss in long-distance steam pipelines, is characterized in that... The length of the main steam pipeline obtained in step four is corrected by multiplying the length of the main steam pipeline by the weight correction factor per unit length of the main steam pipeline; the length of the primary steam pipeline for each user obtained in step four is also corrected by multiplying the length of the primary steam pipeline for each user by the weight correction factor per unit length of the primary steam pipeline.

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