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Three-cylinder three-exhaust steam turbine capable of switching circulating water heat supply and switching method thereof

A three-cylinder, three-exhaust, circulating water technology, which is applied in steam engine installations, mechanical equipment, steam applications, etc., can solve the problems of partial blockage that cannot be mortgaged, and cannot use high back pressure circulating water for heating, etc., to improve energy utilization. efficiency, improving steam utilization, and improving the efficiency of low-pressure cylinders

Inactive Publication Date: 2021-02-26
DONGFANG TURBINE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The medium-pressure part and low-pressure part of the medium-low pressure cylinder of the existing three-exhaust steam unit both perform work, and the mortgage part cannot be blocked, so it cannot be applied to high back pressure circulating water heating

Method used

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  • Three-cylinder three-exhaust steam turbine capable of switching circulating water heat supply and switching method thereof
  • Three-cylinder three-exhaust steam turbine capable of switching circulating water heat supply and switching method thereof
  • Three-cylinder three-exhaust steam turbine capable of switching circulating water heat supply and switching method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as Figure 1 ~ Figure 3As shown, the three-cylinder three-exhaust steam turbine with switchable circulating water heating in this embodiment includes a medium and low pressure rotor 1, the other end of the medium and low pressure rotor 1 is connected with a coupling, and the other end of the coupling is connected with a low pressure rotor 2. The medium and low pressure rotor 1 includes a medium pressure section 11 of the medium and low pressure rotor and a low pressure section 12 of the medium and low pressure rotor. The low pressure section 12 of the medium and low pressure rotor is connected with a coupling, and the medium pressure section 11 of the medium and low pressure rotor is arranged with a medium pressure cylinder 3. The low-pressure section 12 of the medium-low pressure rotor is an optical axis, and the low-pressure section 12 of the medium-low pressure rotor is connected with a disc 4, and a steam seal body 5 is connected between the disc 4 and the mediu...

Embodiment 2

[0048] Such as Figure 1~3 As shown, the switching method of the three-cylinder three-exhaust steam turbine that can switch the circulating water heating of the present embodiment includes the following steps:

[0049] S1: Connect the steam seal body 5 between the disc 4 and the medium pressure cylinder 3; set the low pressure section 12 of the medium and low pressure rotor as the rotor of the optical axis, and the low pressure section 12 of the medium and low pressure rotor is connected with the disc 4;

[0050] S2: During the heating period, replace the low-pressure rotor 2 with the low-pressure rotor 2 that removes the last stage and the second-last stage rotor blade; open the shut-off valves on the heating network circulating water pipeline 81 and the intermediate pipeline 93, and close the circulating cooling water pipeline 82 , the shut-off valve on the water outlet pipe 83 on the turbine side and the water inlet pipe 91 on the motor side;

[0051] S3: In the non-heatin...

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Abstract

The invention belongs to the technical field of steam turbines, and particularly relates to a three-cylinder three-exhaust steam turbine capable of switching circulating water heat supply and a switching method thereof. According to the technical scheme, the three-cylinder three-exhaust steam turbine capable of switching circulating water heat supply is characterized in that only part of a wheel disc is reserved when moving blades are machined and removed at a low-pressure section of a medium-low-pressure rotor, the wheel disc is connected to the low-pressure section of the medium-low-pressurerotor, and a steam seal body is connected between the wheel disc and a medium-pressure cylinder; shut-off valves are mounted on a heat supply network circulating water pipeline, a circulating coolingwater pipeline, a steam turbine side water outlet pipeline, a motor side water inlet pipeline and a middle pipeline which are externally connected to a condenser. The invention provides a three-cylinder three-exhaust steam turbine capable of freely switching circulating cooling water and heating network circulating water and a switching method of the three-cylinder three-exhaust steam turbine.

Description

technical field [0001] The invention belongs to the technical field of steam turbines, and in particular relates to a three-cylinder three-row steam turbine capable of switching circulating water for heating and a switching method thereof. Background technique [0002] The three-exhaust steam unit was the main model in my country's thermal power field in the 1980s, which solved the manufacturing problem of long tail blades at that time, and had the advantage of modularization of low-pressure cylinders. But at present, the economic benefits and safety of its units are obviously not up to the contemporary level. [0003] There are two main methods for steam turbine heating and heating: one is the method of drilling holes in the middle row (cylinder block or connecting pipe) to extract steam. The parameters of the extracted steam (usually around 200°C, 0.5MPa) are much higher than the required temperature of the circulating water (70°C~130°C), which reduces the power generatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K11/02F01K7/02F01K7/16F01K17/02F01K13/02F01D13/02
CPCF01D13/02F01K7/02F01K7/16F01K11/02F01K13/02F01K17/02
Inventor 米斌管洪军宫卫平曾娅赵卫军王文中李煜李宏伟张月雷李伟董天文廖豪张道军李压伟
Owner DONGFANG TURBINE CO LTD