Large temperature-difference central heating system

A central heating and large temperature difference technology, which is applied in steam central heating systems, heating systems, hot water central heating systems, etc., can solve the problems of low energy utilization efficiency, achieve large heating temperature differences, increase transportation capacity, The effect of lowering the return water temperature

Active Publication Date: 2009-07-01
TSINGHUA UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this process, since the heat network recovery does not directly recover the waste heat of the steam turbine condenser, only a part of the waste heat of the condenser can be recovered entirely by the absorption heat pump, and most of the waste heat is still discharged to the atmosphere and wasted in vain. The energy utilization of the system low efficiency

Method used

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  • Large temperature-difference central heating system
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Examples

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Embodiment 1

[0014] Example 1: Basic heating method. like figure 1 As shown, the system consists of steam turbine 1, condenser 2, steam absorption heat pump 3, steam-water heat exchanger 4, hot water absorption heat pump 5, water-water heat exchanger 6, connecting pipelines and accessories. The exhaust steam from the final stage of the steam turbine 1 enters the condenser 2 to heat the circulating water, and then returns to the boiler for heating after being cooled and condensed; the steam extracted from the steam turbine 1 is divided into two paths, and one path enters the steam absorption heat pump 3 as a driving heat source to recover the waste heat of the circulating water , and heat the large heat network, and the other way enters the steam-water heat exchanger 4, directly heats the large heat network, and the steam condenses and returns to the boiler for heating; the circulating cooling water enters the condenser 2, is sent out after being heated by the exhaust steam of the steam tur...

Embodiment 2

[0016] Example 2: Three-stage steam absorption heat pumps are used for heating in series. like figure 2 As shown, the system consists of a steam turbine 1, a condenser 2, a first-stage steam absorption heat pump 3a, a second-stage steam absorption heat pump 3b, a third-stage steam absorption heat pump 3c, a steam-water heat exchanger 4, and a hot water absorption heat pump 5. The water-water heat exchanger 6 is composed of connecting pipelines and accessories. The exhaust steam from the final stage of steam turbine 1 enters the condenser 2 to heat the circulating water, and after being cooled and condensed, it returns to the boiler for heating; the steam extracted from steam turbine 1 is divided into two paths, and one path is used as a driving heat source to enter the first-stage steam absorption heat pump 3a and the second stage respectively. The first-stage steam absorption heat pump 3b and the third-stage steam absorption heat pump 3c recover the waste heat of the circul...

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Abstract

A kind of concentrated heat-supply system includes a steam turbine (1), which has a condenser (2), at least a steam absorption type heat pump (3), a steam-water heat exchanger (4) and pipes (7, 8, 9). The exhausted steam of the steam turbine (1) is used to pre-heat the back-water of the first heat network, and drive the steam absorption type heat pump (3). The hot water of the heat network is heated by the condenser (2), the steam absorption type heat pump (3) and the steam-water heat exchanger (4) for three times. At the end, the heat-supply hot water of the second network is heated by a hot water absorption type heat pump (5) and a water-water heat exchanger (6) in a combination form.

Description

technical field [0001] The invention belongs to a central heating system with a large temperature difference. Compared with the conventional central heating system, this system can not only greatly increase the temperature difference between the supply and return water of high-temperature hot water, increase the transmission capacity of the heat network, but also effectively recover the steam turbine of the power plant. Exhaust heat. Background technique [0002] With the continuous development of the city scale, the urban central heating area continues to increase, and the heat source of central heating is developing to large-scale thermal power plants. These thermal power plants have two problems in heat supply. It is relatively small, and a large amount of waste heat is discharged from the cooling tower through the exhaust steam at the end of the steam turbine; secondly, because such a large-scale thermal power plant is far away from the heating load center, and the heati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24D9/00F24D1/02F24D1/08F24D3/18
CPCF01K7/38Y02B30/52Y02B30/123Y02E20/14
Inventor 付林江亿张世钢肖常磊李永红胡鹏狄洪发陈闯
Owner TSINGHUA UNIV
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