CN-224214237-U - Condensing steam turbine exhaust steam waste heat utilization system

CN224214237UCN 224214237 UCN224214237 UCN 224214237UCN-224214237-U

Abstract

The utility model discloses a condensing steam turbine exhaust waste heat utilization system, which efficiently utilizes latent heat of exhaust steam of a condensing steam turbine and avoids heat waste. The condensing steam turbine Rankine cycle system comprises a boiler, a steam turbine, a condenser, a pump and a preheater, wherein the condenser and the preheater are respectively provided with a heating section and a heat absorption section, the outlet end of the boiler is sequentially connected with the steam turbine, the condenser heating section, the pump, the heat absorption section of the preheater and the inlet end of the boiler, the condensing steam turbine Rankine cycle system is formed, the circulating working medium of the condensing steam turbine Rankine cycle system is water, the condensing steam turbine Rankine cycle system further comprises a compressor and an expansion valve, the outlet end of the heat absorption section of the condenser is sequentially connected with the inlet ends of the compressor, the heating section of the preheater, the expansion valve and the heat absorption section of the condenser, the heat pump cycle system is formed, and the circulating working medium of the heat pump cycle system is organic working medium.

Inventors

LIU FENG
DENG HAO
ZHANG JIANYUN
GUO QING
DAN GUANGJU
HE XIAORONG
HU XUAN
WU JUNBO

Assignees

重庆江增重工有限公司

Dates

Publication Date: 20260508
Application Date: 20250714

Claims (2)

1. The condensing steam turbine exhaust waste heat utilization system comprises a condensing steam turbine Rankine cycle system and is characterized by comprising a boiler, a steam turbine, a condenser, a pump and a preheater, wherein the condenser and the preheater are respectively provided with a heating section and a heat absorption section; The outlet end of the boiler is sequentially connected with a steam turbine, a condenser heating section, a pump, a preheater heat absorption section and the inlet end of the boiler, and a condensing steam turbine Rankine cycle system is formed, and the circulating working medium of the condensing steam turbine Rankine cycle system is water; The heat pump cycle system further comprises a compressor and an expansion valve, wherein the outlet end of the condenser heat absorption section is sequentially connected with the inlet ends of the compressor, the preheater heating section, the expansion valve and the condenser heat absorption section, and a heat pump cycle system is formed, and the cycle working medium of the heat pump cycle system is an organic working medium.
2. The condensing steam turbine exhaust steam waste heat utilization system of claim 1, wherein the working medium of the heat pump circulation system is R245fa.

Description

Condensing steam turbine exhaust steam waste heat utilization system Technical Field The utility model relates to the technical field of low-temperature waste heat utilization, in particular to a condensing steam turbine exhaust waste heat utilization system. Background Under the development background of national advocations of low carbon, environmental protection, energy saving and consumption reduction, more and more low-temperature waste heat such as industrial waste gas, waste liquid, waste material is effectively utilized. In the condensing steam turbine rankine cycle, as shown in fig. 1, the steam turbine exhaust steam is cooled to a liquid state by circulating cooling water, and latent heat released from the conversion of the steam state to the liquid state of the exhaust steam is taken away by the circulating cooling water and released to the natural environment. The exhaust temperature of the medium and small units is generally above 60 ℃, the temperature from the cooled exhaust to the liquid state is generally about 35 ℃, and the exhaust temperature is equivalent to the fact that the part of latent heat of the exhaust steam of the steam turbine is changed from the gas state to the liquid state and is totally released to the natural environment, so that the heat is wasted. Therefore, the utility model disclosed herein aims at the part of heat, and makes efficient use of the heat, so as to assist China to realize the strategic development targets of carbon peak and carbon neutralization in the early days. Disclosure of Invention The utility model aims to overcome the defects of the prior art and provide a condensing steam turbine exhaust waste heat utilization system which is used for efficiently utilizing the latent heat of the condensing steam turbine exhaust steam and avoiding heat waste. The purpose of the utility model is realized in the following way: The condensing steam turbine exhaust waste heat utilization system comprises a condensing steam turbine Rankine cycle system, comprising a boiler, a steam turbine, a condenser, a pump and a preheater, wherein the condenser and the preheater are respectively provided with a heating section and a heat absorption section, The outlet end of the boiler is sequentially connected with a steam turbine, a condenser heating section, a pump, a preheater heat absorption section and the inlet end of the boiler, and a condensing steam turbine Rankine cycle system is formed, and the circulating working medium of the condensing steam turbine Rankine cycle system is water; The heat pump cycle system further comprises a compressor and an expansion valve, wherein the outlet end of the condenser heat absorption section is sequentially connected with the inlet ends of the compressor, the preheater heating section, the expansion valve and the condenser heat absorption section, and a heat pump cycle system is formed, and the cycle working medium of the heat pump cycle system is an organic working medium. Preferably, the working medium of the heat pump circulation system is R245fa. Due to the adoption of the technical scheme, the utility model has the following beneficial effects: 1. Said utility model can effectively utilize the latent heat of steam discharged from condensing steam turbine, and can prevent heat waste, specially can save resource. 2. In the utility model, the high-temperature gas generated by the heat pump system is used as a heat source, and the heat is transferred to the condensing steam turbine Rankine cycle system, so that the heat is effectively transferred and used. 3. In the utility model, the high-temperature gas generated by the heat pump system is used as a heat source, and the water supply of the boiler in the condensing steam turbine Rankine cycle system is preheated, so that the water temperature supplied to the boiler is increased, the heat load of a boiler section is effectively reduced, the fuel gas or the fire coal of a burning boiler is saved, and the mineral resources are effectively saved. 4. Said utility model can accurately respond to the national related energy-saving and emission-reducing policy, and can effectively promote the development of green, high-efficiency and continuous high-quality of China. Drawings FIG. 1 is a schematic diagram of a conventional condensing steam turbine Rankine cycle system; fig. 2 is a schematic diagram of a condensing steam turbine exhaust waste heat utilization system. Reference numerals In fig. 1, 1 a high temperature vapor state working medium, 2 a low temperature vapor state working medium, 3 a low temperature liquid state working medium, a heated liquid state working medium, b a low temperature liquid state working medium; In fig. 2, 1 high temperature vapor state working medium, 2 low temperature vapor state working medium, 3 low temperature liquid state working medium, 4 medium temperature liquid state working medium, a superheated gaseous state working medium, B high temperature vapor stat