High-effect steam turbine impulse rotation parameter optimization device

Abstract

The utility model relates to the field of steam turbine adjusting equipment, in particular to a high-effect steam turbine impulse rotation parameter optimizing device which comprises a steam pipeline, a discharge non-return pipeline and a drain pipeline which are connected to a high-pressure cylinder. The discharge non-return pipeline is connected to the steam discharge end of the high-pressure cylinder; the drain pipeline is connected to the steam pipeline and comprises a first drain branch and a second drain branch which are led out of the condenser, the first drain branch comprises two manual branches, each manual branch comprises a drain primary manual door and a drain secondary manual door which are connected in series, and the second drain branch comprises two drain pneumatic control branches. The water draining pneumatic control branch comprises an automatic front water draining pneumatic control door and a front water draining pneumatic control door front manual door which are connected in series, and the water draining primary manual door and the front water draining pneumatic control door front manual door are connected with a steam pipeline. The utility model can shorten the time for burning parameters of the boiler and quickly improve the impulse parameter of the steam turbine.

Description

Technical Field

[0001] The utility model relates to the field of steam turbine regulating equipment, in particular to a high-efficiency steam turbine run-up parameter optimization device. Background Art

[0002] At present, the high-pressure cylinder preheating system is put into use before the steam turbine of 300MW unit in my country is started up, so that the cylinder temperature reaches the warm start condition. After the boiler is ignited, it is necessary to wait for the boiler side burning parameters to reach the start-up parameter conditions before the steam turbine can be started up. Since the diameter of the drain pipe in front of the automatic main steam valve of the steam turbine is small, the boiler side needs to burn oil for 3 hours to reach the warm start-up parameter conditions of the steam turbine. The time to reach the start-up parameter adjustment is long, and the temperature difference between the main steam temperature on the boiler side and the steam turbine side is large. Due to the increasingly tense power generation form at present, only by successfully starting the steam turbine in time and connecting the generator to the grid can more power generation be obtained, so that the enterprise has more benefits. Therefore, it is urgent to shorten the boiler burning parameter time and quickly improve the steam turbine start-up parameters and start-up and grid connection. Utility Model Content

[0003] The utility model aims to provide a high-efficiency steam turbine startup parameter optimization device to solve the problems of long time to achieve startup parameter adjustment and large temperature difference.

[0004] The high-efficiency steam turbine run-up parameter optimization device in this scheme comprises a steam pipeline and a discharge check pipeline connected to the high-pressure cylinder, wherein the steam pipeline is connected to one end of the high-pressure cylinder close to the medium-pressure cylinder, and the discharge check pipeline is connected to the steam discharge end of the high-pressure cylinder;

[0005] It also includes a drain pipeline, which is connected to the steam pipeline. The drain pipeline includes a first drain branch and a second drain branch led out from the condenser. The first drain branch includes two manual branches, and the manual branch includes a primary drain manual door and a secondary drain manual door connected in series with each other. The second drain branch includes two drain air-controlled branches, and the drain air-controlled branch includes an automatic front drain air-controlled door and a front manual door in front of the front drain air-controlled door connected in series with each other. The primary drain manual door and the front manual door in front of the front drain air-controlled door are connected to the steam pipeline.

[0006] The beneficial effects of this program are:

[0007] Compared with the existing main steam system, this scheme adds two more drains on the main steam pipes in front of the automatic main steam valves on the left and right sides. The setting of the drain pipes on both sides increases the circulation of steam and speeds up the discharge of water accumulated in the steam pipes. The temperature of the main steam can be quickly increased in a shorter time, thereby quickly increasing the main steam temperature required for the turbine start-up parameters and reducing the main steam temperature on the boiler side and the main steam temperature on the turbine side.

[0008] Further, the steam pipeline includes a main steam electric valve connected to the steam inlet end of the superheater, the main steam electric valve is connected to a first automatic main steam valve through a pipeline, the first automatic main steam valve is connected to two first high-pressure regulating steam valves through a pipeline, and the first high-pressure regulating steam valves are both connected to one side of the high-pressure cylinder;

[0009] The main steam electric valve is connected to a second automatic main steam valve through a pipeline, and the second automatic main steam valve is connected to two second high-pressure regulating steam valves through pipelines, and the second high-pressure regulating steam valves are both connected to the other side of the high-pressure cylinder.

[0010] The beneficial effect is that steam can flow to the high-pressure cylinder through the arrangement of the steam pipeline.

[0011] Furthermore, the discharge check pipeline includes two high-pressure discharge check valves connected to the end of the high-pressure cylinder through a pipeline, and the high-pressure discharge check valves are used for exhausting steam from the high-pressure cylinder.

[0012] The beneficial effect is that the setting of the discharge check pipe can prevent the backflow of air that needs to be discharged.

[0013] Further, one of the drain primary manual door and the front drain air-controlled door manual door is connected between the main steam electric door and the first automatic main steam valve, and the other of the drain primary manual door and the front drain air-controlled door manual door is connected between the main steam electric door and the second automatic main steam valve.

[0014] The beneficial effects are: the setting of the positions of various valves can conveniently connect to the drain pipe, making the modification easier, and the corresponding drain pipes are set for the two steam pipes respectively, which can quickly increase the main steam temperature required for the turbine start-up parameters and reduce the temperature difference between the main steam temperature on the boiler side and the main steam temperature on the turbine side.

[0015] Furthermore, the pipeline flow rate of the drain pipeline is 30m 3 / s, the pipe diameter of the drain pipe is one third of the pipe diameter of the steam pipe.

[0016] The beneficial effect is that by setting the parameters of the drain pipeline, the main steam temperature required for the turbine start-up parameters can be increased, and the main steam temperature on the boiler side and the main steam temperature on the turbine side can be reduced without affecting the normal steam pipeline.

[0017] Furthermore, the primary drain manual door, the secondary drain manual door, the automatic front drain air-controlled door and the front manual door of the front drain air-controlled door adopt high temperature and high pressure resistant valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of an embodiment of the utility model of a high-efficiency steam turbine run-up parameter optimization device. DETAILED DESCRIPTION

[0019] The following is further explained in detail through specific implementation methods.

[0020] The figure marks in the drawings of the specification include: main steam electric door 1, drain primary manual door 2, drain secondary manual door 3, drain pipeline 4, front drain air-controlled door front manual door 5, automatic front drain air-controlled door 6, first automatic main steam valve 7, second automatic main steam valve 8, first high-pressure regulating valve 9, second high-pressure regulating valve 10, high-exhaust check valve 11.

[0021] Example

[0022] High-efficiency steam turbine run-up parameter optimization device, such as Figure 1 As shown: it includes a steam pipeline and a discharge check pipeline connected to the high-pressure cylinder, the steam pipeline is connected to one end of the high-pressure cylinder close to the medium-pressure cylinder, and the discharge check pipeline is connected to the steam discharge end of the high-pressure cylinder, wherein the high-pressure cylinder and the medium-pressure cylinder are high- and medium-pressure combined cylinders.

[0023] It also includes a drain pipeline 4, which is connected to the steam pipeline. The drain pipeline 4 includes a first drain branch and a second drain branch led out from the condenser. The first drain branch includes two manual branches, one end of the two manual branches is connected to the condenser, and the other end of the two manual branches is connected to the steam pipeline. The manual branch includes a primary drain manual door 2 and a secondary drain manual door 3 connected in series with each other. The second drain branch includes two drain air-controlled branches, one end of the two drain air-controlled branches is connected to the condenser, and the other end of the two drain air-controlled branches is connected to the steam pipeline. The drain air-controlled branch includes an automatic front drain air-controlled door 6 and a front manual door 5 in front of the front drain air-controlled door connected in series with each other. The primary drain manual door 2 and the front manual door 5 in front of the front drain air-controlled door are connected to the steam pipeline.

[0024] The steam pipeline includes a main steam electric valve 1 connected to the steam inlet end of the superheater. The main steam electric valve 1 is connected to the first automatic main steam valve 7 through a pipeline. The first automatic main steam valve 7 is connected to two first high-pressure regulating valves 9 through two pipelines respectively. The first high-pressure regulating valves 9 are all connected to one side of the high-pressure cylinder.

[0025] The main steam electric valve 1 is connected to the second automatic main steam valve 8 through another pipeline. The second automatic main steam valve 8 is connected to two second high-pressure regulating valves 10 through two pipelines respectively. The second high-pressure regulating valves 10 are connected to the other side of the high-pressure cylinder, that is, the first high-pressure regulating valve 9 and the second high-pressure regulating valve 10 are respectively connected to the two sides of the high-pressure cylinder.

[0026] The discharge check pipeline includes a pipe connected to the end of the high-pressure cylinder, and two high-discharge check valves 11 are respectively located on the two pipes. The high-discharge check valves 11 are used for exhausting steam from the high-pressure cylinder.

[0027] A drain primary manual door 2 and a front drain air-controlled door front manual door 5 are connected between the main steam electric door 1 and the first automatic main steam valve 7, and another drain primary manual door 2 and a front drain air-controlled door front manual door 5 are connected between the main steam electric door 1 and the second automatic main steam valve 8.

[0028] The flow rate of drain pipe 4 is 30m 3 / s, the pipe diameter of the drain pipe 4 is one third of the pipe diameter of the steam pipe. The primary drain manual door 2, the secondary drain manual door 3, the automatic front drain air control door 6 and the front drain air control door front manual door 5 are valves resistant to high temperature and high pressure.

[0029] Before the boiler is started, close the main steam electric door 1, open the two automatic front drain gas control doors 6, the two front drain gas control door front manual doors 5, the drain primary manual door 2 and drain secondary manual door 3 of the left manual branch, and the drain primary manual door 2 and drain secondary manual door 3 of the right manual branch. Close the first automatic main steam valve 7, the two first high-pressure regulating steam valves 9 from left to right, the second automatic main steam valve 8, and the two second high-pressure regulating steam valves 10 from left to right. There is no order for opening or closing multiple valves. Close the two high-discharge check valves 11.

[0030] After the boiler is started, the main steam electric door 1 is opened, and the steam goes along the pipeline to the left side to start the primary drain manual door 2 and the secondary drain manual door 3 of the left manual branch, and at the same time to the right side to start the primary drain manual door 2 and the secondary drain manual door 3 of the right manual branch; then along the pipeline to the front drain air control door front manual door 5 and the automatic front drain air control door 6 of the left drain air control branch, and at the same time to the front drain air control door front manual door 5 and the automatic front drain air control door 6 of the right drain air control branch, and finally drains to the condenser 20 for recovery.

[0031] Compared with the traditional technology that requires 3 hours for the boiler burning parameters to reach the turbine warm start-up conditions and the temperature difference between the main steam temperature on the boiler side and the main steam temperature on the turbine side reaches about 100°C, the scheme of this embodiment adds two more drains on the main steam pipes in front of the automatic main steam valves on the left and right sides, quickly increases the main steam temperature required for the turbine start-up parameters, and reduces the temperature difference between the main steam temperature on the boiler side and the main steam temperature on the turbine side to about 50°C, which can enable the unit to be started and connected to the grid 2 hours in advance. On the one hand, it can generate 400,000 kW.h more electricity (calculated based on 200MW load when the unit is normal). Calculated at the grid price of 0.4 yuan / kW.h, it can increase revenue by 160,000 yuan, and at the same time reduce the boiler fuel consumption by about 8.8 tons, saving fuel costs by 70,400 yuan, that is, each cold start of the unit can generate revenue of 158,400 yuan, and 1.584 million yuan can be generated in total based on 10 cold starts of the unit per year.

[0032] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A high-efficiency steam turbine run-up parameter optimization device, comprising a steam pipeline and a discharge check pipeline connected to a high-pressure cylinder, wherein the steam pipeline is connected to one end of the high-pressure cylinder close to the intermediate-pressure cylinder, and the discharge check pipeline is connected to the steam discharge end of the high-pressure cylinder; Features: It also includes a drain pipeline, which is connected to the steam pipeline. The drain pipeline includes a first drain branch and a second drain branch led out from the condenser. The first drain branch includes two manual branches, and the manual branch includes a primary drain manual door and a secondary drain manual door connected in series. The second drain branch includes two drain air-controlled branches, and the drain air-controlled branch includes an automatic front drain air-controlled door and a front manual door of the front drain air-controlled door connected in series. The primary drain manual door and the front manual door of the front drain air-controlled door are connected to the steam pipeline.

2. The high-efficiency steam turbine running parameter optimization device according to claim 1, characterized in that: The steam pipeline includes a main steam electric valve connected to the steam inlet end of the superheater, the main steam electric valve is connected to a first automatic main steam valve through a pipeline, the first automatic main steam valve is connected to two first high-pressure regulating steam valves through a pipeline, and the first high-pressure regulating steam valves are both connected to one side of the high-pressure cylinder; The main steam electric valve is connected to a second automatic main steam valve through a pipeline, and the second automatic main steam valve is connected to two second high-pressure regulating steam valves through pipelines, and the second high-pressure regulating steam valves are both connected to the other side of the high-pressure cylinder.

3. The high-efficiency steam turbine running parameter optimization device according to claim 2 is characterized in that: The discharge check pipeline includes two high-pressure discharge check valves connected to the end of the high-pressure cylinder through a pipeline, and the high-pressure discharge check valves are used for exhausting steam from the high-pressure cylinder.

4. The high-efficiency steam turbine running parameter optimization device according to claim 1, characterized in that: One of the drain primary manual door and the front drain air-controlled door is connected between the main steam electric door and the first automatic main steam valve, and the other of the drain primary manual door and the front drain air-controlled door is connected between the main steam electric door and the second automatic main steam valve.

5. The high-efficiency steam turbine run-up parameter optimization device according to claim 1, characterized in that: The pipeline flow rate of the drain pipeline is 30m 3 / s, the pipe diameter of the drain pipe is one third of the pipe diameter of the steam pipe.

6. The high-efficiency steam turbine running parameter optimization device according to claim 2, characterized in that: The primary drain manual door, the secondary drain manual door, the automatic front drain air-controlled door and the front manual door of the front drain air-controlled door adopt high temperature and high pressure resistant valves.

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