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Device for generating electricity by using dead steam discharged by steam turbine

A steam outlet and turbine technology, used in energy-saving projects and waste heat utilization, can solve problems such as system equipment corrosion, achieve high thermal energy quality, reduce costs, and simplify equipment.

Inactive Publication Date: 2011-11-02
唐应吉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, ammonia water is used as the working medium, which is easy to cause corrosion to the system equipment

Method used

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  • Device for generating electricity by using dead steam discharged by steam turbine
  • Device for generating electricity by using dead steam discharged by steam turbine
  • Device for generating electricity by using dead steam discharged by steam turbine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] According to the present invention, a device for generating electricity by exhausting exhaust steam from steam turbine 6 has a structure as follows: figure 1 As shown, it includes a liquid ammonia storage tank 3, a booster pump 4, an evaporator 5, a turbine 1 and a condenser 2; wherein, the turbine 1 is composed of a turbine and a generator connected to the turbine.

[0030] The inlet of the liquid ammonia storage tank 3 is connected with the outlet of the condenser 2, and the outlet of the liquid ammonia storage tank 3 is connected with the liquid ammonia inlet of the evaporator 5 through the booster pump 4, and the evaporator 5 The liquid ammonia steam outlet is connected with the inlet of turbine 1, and the outlet of said turbine 1 is connected with the inlet of said condenser 2, forming a closed circuit;

[0031] The heating circuit of the evaporator 5 is connected to the exhaust steam outlet of the steam turbine 6, and the exhaust steam exhausted by the steam t...

Embodiment 2

[0036] The structure of a device for generating electricity by using steam turbine 6 to discharge exhaust steam described in this embodiment is different from that of embodiment 1, as figure 2 As shown, a superheater 7 is arranged between the liquid ammonia vapor outlet of the evaporator 5 and the inlet of the turbine 1, and the superheater 7 can make the ammonia vapor entering the turbine 1 to do work have a higher thermal energy quality, thereby being able to Improve the overall thermal energy utilization efficiency of the power generation system. The heat source of the superheater may be waste flue gas with heat energy from a power plant.

[0037] As a preferred embodiment, such as Figure 4As shown, in this embodiment, the condensed water outlet of the heating circuit of the evaporator 5 is connected to the water inlet of the steam boiler, and the outlet of the steam boiler is connected to the steam inlet of the steam turbine.

[0038] The exhaust steam exhausted by the...

Embodiment 3

[0043] The structure of a device for generating power by exhausting exhaust steam from the steam turbine 6 described in this embodiment is the same as that in Embodiment 2.

[0044] The exhaust steam exhausted by the steam turbine 6 has a pressure of 0.85MPa and a temperature of 95°C.

[0045] In this embodiment, the power of the generating set is 300 MW, the exhaust steam flow rate is 950 t / h, and the liquid ammonia circulation rate is 1800 t / h.

[0046] When working, the liquid ammonia in the liquid ammonia storage tank 3 is pressurized to 4MPa by the booster pump 4 and sent to the evaporator 5, and the liquid ammonia in the evaporator 5 absorbs the phase change heat of exhaust steam exhausted by the steam turbine 6 and becomes Ammonia vapor with a temperature of 85°C and a pressure of 4MPa; then the ammonia vapor enters turbine 1 to do work, driving a generator to generate 57.3MW; the pressure of ammonia vapor from turbine 1 decreases to 1.5MPa, the temperature drops to 38°...

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Abstract

The invention discloses a device for generating electricity by using dead steam discharged by a steam turbine. The device comprises a liquid ammonia storage tank (3), a pressure boosting pump (4), an evaporator (5), a turbine (1) and a condenser (2). The inlet of the liquid ammonia storage tank (3) is connected with the outlet of the condenser (2), the outlet of the liquid ammonia storage tank (3) is connected with the liquid ammonia inlet of the evaporator (5) by the pressure boosting pump (4), the liquid ammonia steam outlet of the evaporator (5) is connected with the inlet of the turbine (1), and the outlet of the steam turbine (1) is connected with the inlet of the condenser (2), so that a closed loop is formed. The heating loop of the evaporator (5) is connected with the dead steam outlet of the steam turbine, and preferably, a superheater (7) is arranged between the liquid ammonia steam outlet of the evaporator (5) and the inlet of the turbine (1). Compared with the prior art, the invention has the advantages that: by selecting a proper medium, the low-grade heat energy of the dead steam discharged by the steam turbine is effectively utilized, equipment is simplified, cost is lowered, and the overall heat energy utilization efficiency of a generating system is improved.

Description

technical field [0001] The invention belongs to the technical fields of energy-saving engineering and waste heat utilization, and in particular relates to a device for generating electricity by using exhaust steam exhausted by a steam turbine. Background technique [0002] In the industry, water is usually preferred as the thermal working medium for thermal power generation. Water is heated to become high-temperature and high-pressure (temperature 400-500°C, pressure 4-10MPa) steam, and then the steam turbine drives the generator set to generate electricity to achieve heat energy conversion. into electrical energy. During this process, the steam discharged from the steam turbine still contains a large amount of condensation heat (that is, the latent heat of gasification), but its pressure is usually less than 0.1MPa, and its temperature is usually less than 100°C. Because the pressure and temperature are too low, in the above Under the conditions of pressure and temperature...

Claims

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Application Information

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IPC IPC(8): F01K17/02F01K25/10F01D15/10
CPCY02E20/14
Inventor 唐应吉王振宇唐莎张蕾李大鹏
Owner 唐应吉
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