Long heat transport net technology

A heating network and long-distance transmission technology, applied in heating methods, household heating, heating systems, etc., can solve the problems of limited heating radius, large heat loss, and large temperature drop, so as to reduce production costs and ensure heating parameters, the effect of reducing heat loss

Active Publication Date: 2008-03-05
南京苏夏设计集团股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, according to the current conventional design technology, in the steam transportation process, due to the limitation of the existing technology, the heat loss is large, the temperature drop is large (15-20°C temperature drop per kilometer), and the heating radius is greatly limited. , unable to meet the requirements of long-distance terminal heating users
Therefore, many enterprises cannot adopt central heating

Method used

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Examples

Experimental program
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Embodiment 1

[0046] The total length of a single pipeline line (starting point to end point) in a certain place is about 18.5 kilometers. If the outlet pressure of the thermal power plant is 0.94Mpa, the temperature is 300°C, and the flow rate is 18t / h (30% of the design load), the long-distance heating network technology of the present invention is adopted. After calculation, the end-user pressure can reach 0.84MPa, the temperature reaches 178.3°C, and the temperature drop per kilometer is about 6.58°C; when the flow rate reaches 25t / h (40% of the design load), the end-user pressure can reach The temperature reaches 0.8MPa, the temperature reaches 183°C, and the temperature drop per kilometer is about 6.32°C; when the flow rate reaches 40t / h, the pressure to the end user can reach 0.75MPa, the temperature reaches 188°C, and the temperature drop per kilometer is about 6°C. As long as the end user requires the pressure to be greater than 0.5MPa and the temperature to be greater than 165°C to...

Embodiment 2

[0048] The total length of a single pipeline (from the starting point to the end point) in a certain place is about 13.5 kilometers. Using the technical solution of the present invention, if the outlet pressure of the thermal power plant is 0.96Mpa, the temperature is 288°C, and the flow rate is 15t / h (25% of the design load), the calculated : When the end user reaches 12.5 kilometers away, the pressure can reach 0.85MPa, the temperature can reach 198.5℃, and the temperature drop per kilometer is about 6.63℃; The temperature drop was about 6.15°C.

[0049] The invention can greatly expand the heat supply range of thermoelectric enterprises, so that enterprises far away from thermal power plants can also apply to central heating, remove small boilers, effectively reduce coal consumption, increase heat-to-electricity ratio, reduce sulfur dioxide emissions, and protect the environment.

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Abstract

The invention relates a long- distance delivery heat network technique. Its characteristics as following: utilizing high temperature glass wool thermal insulating material and multi-layer heat insulating structure, an external top thermal insulating layer with a layer high temperature glass wool is added at external top part of outermost thermal insulating layer; flame resist aluminum foil glass fiber cloth reflective layer is coated at every layer of thermal insulating material; utilizing effective heat isolating energy sliding pipe carrier, color -wash plate is laded at outermost layer; steam pipeline is set at front and middle part of steam pipe network to start drainage; starting drainage and continuous drainage is set at rear part of the steam pipe network. The invention can lower effectively heat loss during the process of steam transporting.

Description

technical field [0001] The invention relates to a long-distance heating network technology, in particular to a long-distance steam pipeline network transmission technology for energy conservation and emission reduction, and belongs to the technical field of thermal energy engineering. Background technique [0002] According to the current conventional design technology of the steam pipe network, the transmission distance of the steam pipe network is generally 5 to 8 kilometers, and the longest is no more than 10 kilometers (the current design specification is also stipulated in this way). [0003] Following the requirements of the national energy conservation and emission reduction policy, the state compulsorily shuts down high-energy-consuming small thermal power plants below 200,000 Kwh. Energy, improve heat-to-electricity ratio. Therefore, at present, all power generation or thermal power enterprises must carry out unit transformation, provide external heating or increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24D1/08F16L59/02F16L59/08
Inventor 王国兴
Owner 南京苏夏设计集团股份有限公司
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