CN-224229751-U - Waste heat utilization system and steam conveying pipeline

CN224229751UCN 224229751 UCN224229751 UCN 224229751UCN-224229751-U

Abstract

The utility model discloses a waste heat utilization system and a steam conveying pipeline, wherein the waste heat utilization system comprises a condensation water unit, a control unit and a drain pipe, wherein the condensation water unit comprises a first pipe, a second pipe, a water storage tank and a drain valve; the control unit comprises an electric control valve, a liquid level sensor and a controller, wherein the drain pipe is arranged against the steam conveying pipeline, and the middle part of the drain pipe extends to the upper part of the steam conveying pipeline. The steam conveying pipeline comprises a pipeline unit and a plurality of waste heat utilization systems, wherein the pipeline unit comprises a steam pipe, and the waste heat utilization systems are arranged at intervals along the length direction of the steam pipe. Compared with the prior art, the waste heat utilization system provided by the utility model utilizes the water storage tank to store the condensed water, and then utilizes the pressure in the steam pipeline to push the condensed water to flow to the upper part of the steam pipeline along the drainage pipe and then flow downwards, so that a circle of heat barrier is formed around the steam pipeline, and the heat loss of the steam pipeline is greatly reduced.

Inventors

YU XIAOMIN
YUAN XINYE
XIONG XINMING
DONG XUYANG
LI SHI

Assignees

湖北能源光谷热力有限公司

Dates

Publication Date: 20260512
Application Date: 20250528

Claims (10)

1. A waste heat utilization system for a steam delivery conduit, comprising: The condensation water unit comprises a first pipe, a second pipe, a water storage tank and a drain valve, wherein the upper ends of the first pipe and the second pipe are respectively used for being communicated with a steam conveying pipeline, the lower ends of the first pipe and the second pipe are respectively communicated with the water storage tank, and the drain valve is arranged on the first pipe; The control unit comprises an electric control valve, a liquid level sensor and a controller, wherein the electric control valve is arranged on the second pipe, the liquid level sensor is arranged in the water storage tank and is connected with the controller, and the controller is connected with the electric control valve; when the water level of the condensed water in the water storage tank rises to a preset maximum value, the controller controls the electric control valve to be opened, and when the water level of the condensed water in the water storage tank falls to a preset minimum value, the controller controls the electric control valve to be closed; and the inlet of the drain pipe is communicated with the water storage tank, the drain pipe is arranged against the steam conveying pipeline, the middle part of the drain pipe extends to the upper part of the steam conveying pipeline, and the water outlet of the drain pipe is positioned below the steam conveying pipeline.
2. The waste heat utilization system of claim 1, wherein the drain pipe comprises a main pipe and a plurality of branch pipes, wherein the water inlet of the main pipe is communicated with the water storage tank, the water outlet of the main pipe is positioned above the steam conveying pipeline, the water inlet of each branch pipe is communicated with the water outlet of the main pipe, the branch pipes are arranged close to the steam conveying pipeline, and the water outlet of each branch pipe is positioned below the steam conveying pipeline.
3. The waste heat utilization system of claim 2, wherein a portion of the branch pipes are located on one side of the vapor delivery conduit and another portion of the branch pipes are located on the other side of the vapor delivery conduit.
4. The waste heat utilization system of claim 1, wherein the control unit further comprises an energy supply module respectively connected to the electronic control valve, the liquid level sensor, and the controller to supply energy thereto.
5. The waste heat utilization system of claim 4, wherein the energy supply module comprises a battery and a solar panel, the solar panel is disposed on the steam delivery conduit and connected to the battery, and the battery is connected to the electronic control valve, the liquid level sensor, and the controller, respectively.
6. A steam delivery pipe, characterized in that it comprises a pipe unit and a plurality of waste heat utilization systems according to any one of claims 1-5, wherein the pipe unit comprises steam pipes, the waste heat utilization systems are arranged at intervals along the length direction of the steam pipes, the first pipe and the second pipe are respectively communicated with the steam pipes, and the drain pipe is arranged against the steam pipes.
7. The vapor delivery conduit of claim 6, wherein the conduit unit further comprises a first insulation layer surrounding the vapor tube arrangement, the first and second tubes extending through the first insulation layer and communicating with the vapor tube, the drain tube disposed against the first insulation layer.
8. The vapor delivery conduit of claim 7, wherein the conduit unit further comprises a thermally conductive layer surrounding the first insulation layer, and wherein the middle portion of the drain conduit is positioned within the thermally conductive layer.
9. The vapor delivery conduit of claim 8, wherein the conduit unit further comprises a second insulation layer surrounding the thermally conductive layer, the first and second tubes extending through the first insulation layer, the thermally conductive layer, and the second insulation layer, the two ends of the drain tube extending through the second insulation layer, and the middle of the drain tube being positioned within the thermally conductive layer.
10. The vapor delivery conduit of claim 6, wherein the first tube communicates with a bottom portion of the vapor tube and the second tube communicates with a middle or upper portion of the vapor tube.

Description

Waste heat utilization system and steam conveying pipeline Technical Field The utility model relates to the technical field of steam conveying, in particular to a waste heat utilization system and a steam conveying pipeline. Background The steam has larger heat loss in the conveying process, the temperature is generally reduced by 8-10 ℃ per kilometer, the pressure is reduced by about 0.08MPa, and the pipeline loss becomes a main limiting factor of the steam pipeline conveying economy. Meanwhile, as part of the steam in the heat loss is condensed into water, along with the increase of the distance, the condensed water can cause water hammer accidents after gathering, so that a drainage device is required to be arranged at intervals in the design of the steam pipeline, and the drainage is generally discharged to a sewer on site due to small quantity. Whereas the condensation temperature is typically a saturation temperature at one atmosphere, slightly less than 100 ℃. This heat is wasted. The heat loss of the steam pipe is mainly dependent on the temperature of the steam, the ambient temperature and the total thermal resistance of the insulation structure. Through technical and economic analysis, the mode of reducing the heat loss of the pipeline by increasing the total heat resistance of the pipeline heat insulation structure is economically feasible when the heat supply radius is within 6 km. How to reduce the heat loss of the pipe by reducing the temperature difference between the steam temperature and the ambient temperature becomes one of the consideration ways to increase the heating radius. Chinese patent CN210219062U provides a condensate waste heat utilization system of long steam transmission pipeline, utilizes high temperature condensate to heat the heat preservation, thereby has reduced the difference in temperature of heat preservation both sides and has reduced the loss of steam. However, the condensed water pipeline of the scheme passes through the lower part of the heat insulation layer of the steam delivery pipe, and the upper part of the heat insulation layer cannot form a heat barrier, so that the effect of reducing the heat loss of the steam pipeline is not ideal. Disclosure of utility model The utility model aims to overcome the technical defects, and provides a waste heat utilization system and a steam conveying pipeline, which solve the technical problems that the prior art cannot establish a comprehensive heat barrier for the steam pipeline, so that the effect of reducing the heat loss of the steam pipeline is not ideal. In order to achieve the technical purpose, the utility model adopts the following technical scheme: In a first aspect, the utility model provides a waste heat utilization system for a steam delivery pipe, comprising a condensate unit, a control unit and a drain pipe, The condensation water unit comprises a first pipe, a second pipe, a water storage tank and a drain valve, wherein the upper ends of the first pipe and the second pipe are respectively used for being communicated with a steam conveying pipeline, the lower ends of the first pipe and the second pipe are respectively communicated with the water storage tank, and the drain valve is arranged on the first pipe; The control unit comprises an electric control valve, a liquid level sensor and a controller, wherein the electric control valve is arranged on the second pipe, the liquid level sensor is arranged in the water storage tank and is connected with the controller, and the controller is connected with the electric control valve; when the water level of the condensed water in the water storage tank rises to a preset maximum value, the controller controls the electric control valve to be opened, and when the water level of the condensed water in the water storage tank falls to a preset minimum value, the controller controls the electric control valve to be closed; The inlet of the drain pipe is communicated with the water storage tank, the drain pipe is arranged against the steam conveying pipeline, the middle part of the drain pipe extends to the upper part of the steam conveying pipeline, and the water outlet of the drain pipe is positioned below the steam conveying pipeline. In some embodiments, the drain pipe comprises a main pipe and a plurality of branch pipes, wherein the water inlet of the main pipe is communicated with the water storage tank, the water outlet of the main pipe is positioned above the steam conveying pipeline, the water inlet of each branch pipe is communicated with the water outlet of the main pipe, the branch pipes are arranged close to the steam conveying pipeline, and the water outlet of each branch pipe is positioned below the steam conveying pipeline. In some embodiments, a portion of the branch is located on one side of the vapor delivery conduit and another portion of the branch is located on the other side of the vapor delivery conduit. In some embodiments, the control unit furt