CN107060919A - A kind of gas fired-boiler steam turbine power generation Quick starting energy-saving device and method - Google Patents

Abstract

An energy-saving device and method for quick start-up of gas-fired boiler steam turbine power generation, which belong to the technical field of gas-fired boiler steam turbine power generation equipment and methods, and are used for quick start-up of gas-fired boiler steam turbine power generation. The technical solution is: the invention adds a heating device for the lower part of the quick-start boiler, and adopts low-pressure circulation heating of the atmospheric deaerator, low-pressure circulation heating of the high-pressure deaerator, direct heating at the bottom of the external steam boiler, and low-pressure circulation of the steam turbine during the start-up process. Slip parameter start and other steps, the boiler is connected to the grid to replace the load for a total of 9 hours from the ignition and pressure generation, the main steam heating pipe, and the turbine slip parameter start. The invention greatly shortens the start-up time of the gas-fired boiler steam turbine generator set, reduces the large amount of steam released during the boiler start-up process, reduces the start-up cost of the unit, improves the safety problem of the gas-fired boiler and steam turbine quick start, and prevents the unit from being connected to the grid The current steam noise pollutes the surrounding residents and reduces the phenomenon of gas fires in iron and steel enterprises escaping.

Description

Energy-saving device and method for quick start-up of gas-fired boiler and steam turbine for power generation

technical field

The invention relates to a device and method for quickly starting and saving energy for gas-fired boiler steam turbine power generation in iron and steel enterprises, and belongs to the technical field of gas-fired boiler steam turbine power generation equipment and methods in iron and steel enterprises.

Background technique

At present, the occurrence and use of gas in iron and steel enterprises are volatile, such as when the blast furnace is closed or waiting for materials, the gas consumption of the hot blast furnace fluctuates, equipment maintenance, product requirements change, etc. The fluctuation coefficient of gas consumption is general. It is 15%-20%. The measure to balance this kind of gas fluctuation is to disperse a large number of open flames. In order to make reasonable use of gas energy, most iron and steel enterprises use boilers to burn blast furnace gas turbines to generate electricity. It is a new technology to use a large amount of low calorific value blast furnace gas to generate electricity. Without affecting the safe operation of boilers, it can be increased by adjusting the power generation load. Reducing the consumption of blast furnace gas not only makes effective use of blast furnace gas resources, but also adjusts the pressure fluctuations of the gas pipe network in a timely manner as a buffer for users. There are also cases where the steel rolling heating furnace and other equipment are scheduled to be repaired, or when hot rolling and hot delivery, the gas Wealthy, it is necessary to start the backup generating set for power generation to consume gas to prevent emission.

The current boiler steam turbine power generation starts and grid connection has to go through the following processes:

First of all, the water entering the cold boiler from the boiler water must be desalted water with deoxygenation, and its temperature is ≥150°C. In order to control the temperature difference of the drum wall, it should not exceed 50°C, reduce the thermal stress of the metal, and strictly control the water supply time and Speed, the general watering time ≥ 3 hours.

Secondly, carry out boiler point gas pressure boost and temperature rise. During the process of boosting the pressure of the boiler, the rising rate of the saturated temperature in the drum should be controlled not to exceed 1.75°C/min, and the boiler should be opened to vent the air to the air exhaust valve, and the noise pollution will be accompanied during the venting period. Especially during the period from 0.01MPa to 0.49MPa, the corresponding saturation temperature is 146°C, and the temperature rise rate is fast; as the pressure increases, the temperature does not change much, but because the boiler expands uniformly, a large amount of steam needs to be released. As the pressure increases, the noise pollution decibels bigger. It takes 4 hours for the boiler to rise to the pressure of the main steam of the turbine at 8.83Mpa and the temperature of the main steam at 535°C.

In addition, before the boiler supplies steam to the steam turbine, the steam pipe should be heated for 4 hours. When the main steam pressure of the turbine is about 8.83Mpa and the temperature of the main steam is about 535°C, it takes 4 hours for the steam turbine to warm up and run up to speed up and connect to the grid.

To sum up, it takes at least 15 hours for the normal start-up of boiler water supply until the steam turbine is warmed up and connected to the grid to bring the load to the load, and the start-up noise is loud, which seriously affects the lives of surrounding residents, and what is more serious is during the start-up period Since the load of the unit cannot be connected to the grid, the gas fire needs to be vented, and a large amount of steam is released and gas is consumed when the boiler is started.

With the development of production, the shortcomings of the current boiler and steam turbine power generation start-up, such as long start-up time, loud start-up noise, and large-scale release of steam and gas, are far from meeting production needs, and are not in line with energy saving and emission reduction, and avoiding environmental pollution. The social requirements need to be improved urgently.

By studying the heating mode and thermal characteristics during the start-up process of the unit, the technicians found that the reasonable start-up method and method of the unit should be to heat all parts of the unit evenly during the start-up process, so that the temperature difference, expansion difference, thermal stress and thermal deformation of each part etc. are changed within the allowable range, the total start-up time of the unit is shortened as much as possible, and the safety and economy of the unit start-up are taken into consideration.

Contents of the invention

The technical problem to be solved by the present invention is to provide an energy-saving device and method for quick start-up of gas-fired boiler steam turbine power generation. The problem of excessive length and gas release can also eliminate the problems of energy waste and noise pollution during the start-up of boilers and turbines.

The technical scheme that solves the above-mentioned technical problem is:

A quick-start energy-saving device for gas-fired boiler steam turbine power generation, which includes a high-pressure deaerator, a high-pressure feed water pump, a high-pressure heater, a boiler body, a steam turbine electric main steam valve, a steam turbine, and a generator. The high-pressure deaerator passes through pipelines and high-pressure The feedwater pump is connected, the high-pressure feedwater pump is connected to the high-pressure heater through the pipeline, the high-pressure heater is connected to the boiler water supply system through the pipeline, the boiler water supply system is connected to the boiler body through the pipeline, the boiler is connected to the steam turbine electric main steam valve through the steam pipeline, and the steam turbine electric The main steam valve is connected to the steam turbine through the steam pipe, and the steam turbine is connected to the generator. The improvement is that it also has a heating device for the lower part of the quick-start boiler. The heating device for the lower part of the quick-start boiler includes an atmospheric deaerator, a low-pressure feed Water pump, external heating steam valve, steam heating sub-cylinder, steam heating distribution valve, steam heating distribution check valve, external superheated steam pipeline is connected with steam heating sub-cylinder through external heating steam valve, and steam heating sub-cylinder is connected to the atmosphere through pipelines The steam heating distribution valve and the steam heating distribution check valve are installed in the connecting pipe between the steam heating sub-cylinder and the boiler water cooling wall header.

The above gas-fired boiler steam turbine power generation quick start energy-saving device, the boiler body includes an economizer, a steam drum, a downcomer, a water wall, a water wall header and a regular blowdown valve, which are connected through a high-pressure pipeline.

The gas-fired boiler steam turbine power generation quick-start energy-saving device described above, the turbine body includes a drainage system before the main steam valve of the turbine, an electric main steam valve of the turbine, a drainage system of the turbine body and the turbine, which are connected through high-pressure pipes.

The above-mentioned gas-fired boiler steam turbine power generation quick start energy-saving device, the steam heating sub-cylinder of the lower heating device of the quick start boiler is equipped with a pressure gauge, a thermometer and supporting valves, and the bottom of the steam heating sub-cylinder is installed with a drainage device for removing condensed water .

The gas-fired boiler steam turbine power generation quick-start energy-saving device mentioned above, the atmospheric deaerator of the heating device at the lower part of the quick-start boiler is equipped with a water level gauge, a deaerator head and supporting valves, and the cold refined desalted water pipeline outside the boiler passes through the electric The valve group is connected to the atmospheric deaerator, the bottom of the atmospheric deaerator is connected to the low-pressure feed water pump through the pipeline and the valve group, and the low-pressure feed water pump is connected to the high-pressure deaerator through the pipe and valve group to deliver the heated hot water for deaeration , the regular blowdown valve 9 of the boiler is connected with the atmospheric deaerator through a pipeline and an electric valve group.

A quick-start energy-saving method for gas-fired boiler steam turbine power generation using the above-mentioned device, which includes the following steps:

In the first step, the boiler is heated by low-pressure circulation through the atmospheric deaerator:

The external superheated steam is fed into the steam heating sub-cylinder, and the external cold fine desalted water is sent to the atmospheric deaerator, and the regulating valve of the steam heating sub-cylinder to send to the atmospheric deaerator is opened to control the fine deaerator of the atmospheric deaerator. The desalinated water is heated to remove oxygen; the low-pressure feed water pump sends water to the boiler, and the boiler water heats the boiler equipment. cycle, when the boiler drum wall temperature can reach 40°C;

The second step is to conduct low-pressure circulation heating of the boiler through the high-pressure deaerator:

When the wall temperature of the boiler drum is ≥40°C, put heating steam into the high-pressure deaerator, turn on the high-pressure feed water pump to send hot water from the high-pressure deaerator to the boiler through the high-pressure heater, and send it to the atmospheric deaerator after the hot water boiler releases heat. Oxygenator, and then sent to the high-pressure deaerator through the low-pressure feed water pump to form a low-pressure heating cycle for the boiler, when the boiler drum wall temperature can reach 80 °C;

In the third step, the external steam directly heats the bottom of the boiler:

The externally heated steam enters the boiler through the heating distribution valve and the steam heating distribution check valve to maintain uniform heating, and the boiler drum wall temperature can reach 100°C;

In the fourth step, the low-pressure slip parameter of the turbine is started:

The boiler ignites the gas. After the gas combustion is stable, the pressure of the boiler rises, and the saturated steam generated by the drum turns into superheated steam after heating to warm the main steam pipe. Start the warm-up, and after the turbine reaches the specified speed, the generator 20 is connected to the grid to generate electricity.

The above-mentioned gas-fired boiler steam turbine power generation quick start energy-saving method, the first step includes the following steps:

a. Open the steam trap of the steam heating sub-cylinder, slowly open the external heating steam valve to warm the system pipes, and after the heating pipe is qualified, when the pressure of the steam heating sub-cylinder is greater than or equal to 0.05MPa, close the trap;

b. Slowly open the external heating steam valve to deliver superheated steam to the steam heating sub-cylinder. When the superheated steam pressure of the steam heating sub-cylinder is ≥0.3MPa and the superheated steam temperature is ≥150℃, turn off the external heating steam valve to keep the steam heating in the sub-cylinder Stable superheated steam pressure and temperature;

c. Send the external cold fine desalted water into the atmospheric deaerator through the pipeline and electric valve group, and keep the liquid level at 2/3;

d. Open the steam heating sub-cylinder and the regulating valve of the atmospheric deaerator, heat and deoxygenate the refined desalted water in the atmospheric deaerator, and keep the water temperature in the atmospheric deaerator ≥ 100°C;

e. Turn on the low-pressure feed water pump to send water to the boiler, the hot water is sent to the steam drum through the economizer, and the hot water of the steam drum is sent to the water-cooled wall header through the downcomer and the water cooler, and the temperature of the water after heat release is reduced, and the heat in the water is used Heating the metal temperature of the boiler equipment, opening the regular blowdown valve, sending the lowered boiler water into the atmospheric deaerator to heat up the temperature, after the temperature rises, the water passes through the low-pressure feed water pump and then into the boiler economizer to form a low-pressure cycle heating process, according to the atmosphere The temperature in the atmospheric deaerator, adjust the heating steam volume of the atmospheric deaerator, and always keep the water temperature in the atmospheric deaerator ≥ 100 ℃, carry out low-pressure cycle heating for the boiler system, and the low-pressure cycle time is within 1 hour. When the boiler drum wall temperature can reach 40°C.

In the above gas-fired boiler steam turbine power generation quick start energy-saving method, the second step includes the following steps:

f. When the wall temperature of the boiler drum is ≥40°C, put heating steam into the high-pressure deaerator, keep the water temperature of the high-pressure deaerator ≥150°C, close the low-pressure circulating water valve of the boiler economizer, open the high-pressure circulating water valve, Turn on the high-pressure feed water pump to send water from the high-pressure deaerator, and send it to the boiler economizer through the high-pressure heater. The hot water is sent to the steam drum through the economizer. The sewage valve is sent to the atmospheric deaerator, and then sent to the high-pressure deaerator through the low-pressure feed water pump to form a low-pressure heating cycle, and the water temperature in the high-pressure deaerator is always kept at ≥ 150 ° C, and the boiler system is heated in a low-pressure cycle;

g. When the wall temperature of the boiler drum is ≥80°C, close the regular blowdown valve of the boiler, stop the low-pressure feed water pump, stop the high-pressure feed water pump, stop the circulation heating, and fill the boiler with water to the lowest visible water level of the drum water level gauge. Within 1 hour of cycle time, the boiler Drum wall temperature can reach 80 ℃.

In the above gas-fired boiler steam turbine power generation quick start energy-saving method, the third step includes the following steps:

h. Slowly open the steam heating distribution valve, the heating steam enters the water-cooled wall header through the heating distribution valve and the steam heating distribution check valve to keep the heating uniform, the pipeline does not vibrate, and the temperature difference between the upper and lower walls of the steam drum is controlled not to exceed 40°C (national standard), and the steam heating The sub-cylinder is kept at 0.1 MPa, and heating is strengthened; when the temperature of the boiler water rises to about 100°C, according to the vibration of the pipeline, slowly fully open the external heating steam valve, and fully put into the heating system at the bottom of the boiler to fully increase the pressure and temperature without fire, within 1 hour , When the boiler drum wall temperature can reach 100 ℃.

In the above gas-fired boiler steam turbine power generation quick start energy-saving method, the fourth step includes the following steps:

I． The boiler ignites the gas, and after the gas burns stably, because the temperature in the boiler has reached above 100°C, the pressure increase speed is accelerated, and the boiler pressure rises directly to 0.49MPa. When the steam drum pressure is greater than 0.5MPa, close the steam heating distribution valve and steam heating Distribute the non-return valve, close the external heating steam valve, exit the heating system at the bottom of the boiler, and slightly open the boiler to exhaust steam to the air according to the requirements of the boiler steam temperature and steam pressure rising speed, so as to speed up the pressure and temperature rise;

j. When the pressure of the main steam of the boiler reaches 0.59Mpa and the temperature of the main steam is 190-205°C, close the motorized main steam valve of the turbine, open the drain system before the main steam valve of the turbine and the drain system of the turbine body, and the saturated steam generated by the steam drum will change after being heated. The superheated steam is sent to the electric main steam valve of the turbine, and the main steam pipeline is warmed through the drainage system in front of the main steam valve of the turbine;

k． When the main steam heating pipe is qualified, and the steam pressure in front of the electric main steam valve of the turbine is ≥1.2 MPa, the main steam temperature is ≥220°C, and the superheat is ≥50°C, the boiler is turned off to exhaust steam to the air to maintain stable combustion of the boiler, and the main steam pressure and If the temperature does not drop, start the warm-up with the slip parameters of the steam turbine. When the turbine speeds up to 400 r/min~500 r/min, listen to the sound and check the low-speed warm-up for 5 minutes;

l. The steam turbine speeds up to 1200 r/min evenly within 10 minutes, and warms up at 1200 r/min for 30 minutes;

m. The speed of the steam turbine is increased from 1200 r/min to 3000 r/min at a constant speed within 20 minutes (when passing the critical speed of the steam turbine and power generation, it should be passed quickly and smoothly), and the warm-up inspection is carried out at 3000 r/min for 15 minutes. Generators connected to the grid for power generation;

n． Turn off the drainage system of the steam turbine body. When the steam parameters and evaporation at the boiler outlet reach the rated value, the steam turbine just takes on the rated load. The start-up procedure with slip parameters will be started in another 4 hours and the grid connection will be completed. Within 6 hours, it will warm up with load and have full capacity Load condition.

The beneficial effects of the present invention are:

The gas-fired boiler steam turbine power generation quick-start energy-saving device of the present invention adds a quick-start boiler lower part heating device, and adopts atmospheric type deaerator low-pressure circulation heating, high-pressure deaerator low-pressure circulation heating, and external steam boiler in the start-up process. Bottom direct heating, steam turbine low-pressure sliding parameter start-up and other steps, the boiler starts from ignition pressure generation, main steam heating pipe, turbine sliding parameter start-up and grid-connected load generation for a total of 9 hours. During the start-up process, only a small amount of steam is released, and gas release is eliminated And start the whole process without noise pollution.

The invention greatly shortens the start-up time of the gas-fired boiler steam turbine generator set, reduces the large amount of steam released during the boiler start-up process, reduces the start-up cost of the unit, improves the safety problem of the gas-fired boiler and steam turbine quick start, and prevents the unit from being connected to the grid The current steam noise pollutes the surrounding residents and reduces the phenomenon of gas fires in iron and steel enterprises escaping.

The invention opens up a new way of efficient utilization of gas in iron and steel enterprises, and solves the problem of long start-up time of the gas boiler and turbine for power generation, and has significant economic and social benefits.

Description of drawings

Fig. 1 is a structural schematic diagram of a gas-fired boiler steam turbine power generation quick-start energy-saving device according to the present invention.

The marks in the figure are as follows: high-pressure deaerator 1, high-pressure feed water pump 2, high-pressure heater 3, economizer 4, steam drum 5, downcomer 6, water wall 7, water wall header 8, regular blowdown valve 9, atmosphere Type deaerator 10, low-pressure feed water pump 11, external heating steam valve 12, steam heating sub-cylinder 13, steam heating distribution valve 14, steam heating distribution check valve 15, steam turbine main steam valve front drainage system 16, turbine electric main steam Valve 17, steam turbine body drainage system 18, steam turbine 19, generator 20, low-pressure circulating water valve 21, high-pressure circulating water valve 22, refined and desalinated water 23, superheated steam 24, and heating device 25 at the bottom of the quick-start boiler.

detailed description

The gas-fired boiler steam turbine power generation quick-start energy-saving device of the present invention includes a high-pressure deaerator 1, a high-pressure feed water pump 2, a high-pressure heater 3, a boiler body, a steam turbine electric main steam valve 17, a steam turbine 19, and a heating device for the lower part of the quick-start boiler 25.

The figure shows that the high-pressure deaerator 1 is connected to the high-pressure feed water pump 2 through the pipeline, the high-pressure feed water pump 2 is connected to the high-pressure heater 3 through the pipeline, the high-pressure heater 3 is connected to the boiler water supply system through the pipeline, and the boiler water supply system is connected to the boiler through the pipeline. Ontology connection. The boiler is connected to the steam turbine electric main steam valve 17 through the steam pipeline, the steam turbine electric main steam valve 17 is connected to the steam turbine 19 through the steam pipeline, and the steam turbine 19 is connected to the generator 20 .

As shown in the figure, the boiler body includes an economizer 4, a steam drum 5, a downcomer 6, a water wall 7, a water wall header 8 and a regular blowdown valve 9, which are connected through high-pressure pipes.

As shown in the figure, the turbine body includes a drainage system 16 before the main steam valve of the turbine, an electric main steam valve 17 of the turbine, a drainage system 18 of the turbine body and a turbine 19, which are connected through high-pressure pipelines.

As shown in the figure, the heating device 25 at the lower part of the quick-start boiler includes an atmospheric deaerator 10, a low-pressure feed water pump 11, an external heating steam valve 12, a steam heating sub-cylinder 13, a steam heating distribution valve 14, and a steam heating distribution check valve 15 And related pipeline valves and other equipment.

As shown in the figure, the steam heating sub-cylinder 13 of the superheated steam system is equipped with a pressure gauge, a thermometer and supporting valves, and a drain device is installed at the bottom of the steam heating sub-cylinder 13 to remove condensed water. The superheated steam 24 is connected with the steam heating sub-cylinder 13 through a pipeline through the external heating steam valve 12 . Part of the superheated steam 24 in the steam heating sub-cylinder 13 is connected to the atmospheric deaerator 10 through pipelines and regulating valves, and the other part of the superheated steam 24 is connected to the steam heating distribution valve 14 and the steam heating distribution check valve 15 through pipelines. 24 is connected to the boiler water wall header through steam heating distribution valve 14 and steam heating distribution check valve 15 pipes.

Shown in the figure, the atmospheric deaerator 10 of the steam system is equipped with a water level gauge, a deaerator head and supporting valves. The boiler uses the external cold fine desalinated water 23 to connect with the atmospheric deaerator 10 through the pipeline and the electric valve group, and the bottom of the atmospheric deaerator 10 is connected with the low-pressure feed water pump 11 through the pipeline and the valve group, and transports deoxygenated heated Hot water, low-pressure feed water pump 11 is connected with high-pressure deaerator 1 through pipeline and valve group.

The figure shows that the periodic blowdown valve 9 of the boiler of the boiler circulating heating water system is connected with the atmospheric deaerator 10 through a pipeline and an electric valve group.

The energy-saving method for quick start-up of gas-fired boiler steam turbine power generation in the start-up process adopts the steps of low-pressure circulation heating of atmospheric deaerator, low-pressure circulation heating of high-pressure deaerator, direct heating at the bottom of external steam boiler, and start-up of steam turbine with low-pressure slip parameters. The boiler was started for 9 hours from ignition and pressure generation, main steam heating pipe, and turbine sliding parameters to grid connection and load generation. During the start-up process, only a small amount of steam was released, and the phenomenon of gas release was eliminated at the same time, and there was no noise pollution during the start-up process. Specific steps are as follows:

In the first step, the boiler is heated by low-pressure circulation through the atmospheric deaerator:

a. Open the steam trap of the steam heating sub-cylinder 13, slowly open the external heating steam valve 12 to warm the system, and after the heating pipe is qualified, when the pressure of the steam heating sub-cylinder 13 is greater than or equal to 0.05MPa, close the steam trap;

b. Slowly open the external heating steam valve 12 to deliver superheated steam to the steam heating sub-cylinder 13. When the superheated steam pressure of the steam heating sub-cylinder 13 is ≥ 0.3MPa and the superheated steam temperature is ≥ 150℃, turn off the external heating steam valve 12 to keep the steam The pressure and temperature of the superheated steam in the heating sub-cylinder 13 are stable;

c. Send the external cold fine desalted water 23 into the atmospheric deaerator 10 through the pipeline and electric valve group, and keep the liquid level at 2/3;

d. Open the regulating valve of the steam heating sub-cylinder 13 and the atmospheric deaerator 10, heat and deoxygenate the refined desalted water 23 in the atmospheric deaerator 10, and keep the water temperature in the atmospheric deaerator 10 ≥ 100°C;

e. Turn on the low-pressure feed water pump 11 to send water to the boiler, hot water is sent to the steam drum 5 through the economizer 4, and the hot water from the steam drum 5 is sent to the water-cooled wall header 8 through the downcomer 6 and the water cooler 7, and the water temperature after heat release The heat in the water is used to heat the metal temperature of the boiler equipment, and the regular blowdown valve 9 is opened to send the boiler water with reduced temperature to the atmospheric deaerator 10 to heat up. The coal heater 4 forms a low-pressure cycle heating process. According to the temperature in the atmospheric deaerator 10, the heating steam volume of the atmospheric deaerator 10 is adjusted, and the water temperature in the atmospheric deaerator 10 is always kept at ≥ 100°C. The system carries out low-pressure circulation heating, and the low-pressure circulation time is within 1 hour, when the boiler drum wall temperature can reach 40°C.

The second step is to conduct low-pressure circulation heating of the boiler through the high-pressure deaerator:

f. When the wall temperature of the boiler drum is ≥40°C, put heating steam 24 into the high-pressure deaerator 1, keep the temperature of the water in the high-pressure deaerator 1 ≥150°C, and close the low-pressure circulating water valve 21 for the boiler economizer 4, Turn on the high-pressure circulating water valve 22, turn on the high-pressure feed water pump 2 to send water from the high-pressure deaerator 1, and send it to the boiler economizer 4 through the high-pressure heater 3, and send hot water to the steam drum 5 through the economizer 4, and the steam drum 5 is heated The water is sent to the atmospheric deaerator 10 through the downcomer 6, the water cooler 7, the water-cooled wall header 8 and the regular blowdown valve 9, and then sent to the high-pressure deaerator 1 through the low-pressure feed water pump 11 to form a low-pressure heating cycle, which is always kept at When the temperature of the water in the high-pressure deaerator 1 is ≥150°C, the boiler system is heated in a low-pressure cycle;

g. When the wall temperature of the boiler drum is ≥80°C, close the boiler periodic blowdown valve 9, stop the low-pressure feed water pump 11, stop the high-pressure feed water pump 1, stop the circulation heating, fill the boiler with water to the lowest visible water level of the drum water level gauge, and cycle for 1 hour Inside, when the boiler drum wall temperature can reach 80°C.

In the third step, the external steam directly heats the bottom of the boiler:

h. Slowly open the steam heating distribution valve 14, the heating steam 24 enters the water-cooled wall header 8 through the steam heating distribution valve 14 and the steam heating distribution check valve 15 to maintain uniform heating, the pipeline does not vibrate, and the temperature difference between the upper and lower walls of the steam drum is controlled not to exceed 40°C ( According to the national standard), the steam heating sub-cylinder 13 is kept at 0.1 MPa, and the heating is strengthened; when the temperature of the boiler water rises to about 100°C, according to the vibration of the pipeline, the external heating steam valve 12 is slowly and fully opened, and the heating system at the bottom of the boiler is fully put into the bottom of the boiler. The fire boosts the pressure and heats up, and within 1 hour, the wall temperature of the boiler drum can reach 100°C.

In the fourth step, the low-pressure slip parameter of the turbine is started:

I． The boiler ignites the gas, and after the gas burns stably, because the temperature inside the boiler has reached above 100°C, the pressure increase speed is accelerated, and the boiler pressure rises directly to 0.49MPa. When the pressure of the steam drum 5 is greater than 0.5MPa, close the steam heating distribution valve 14 and The steam heating distribution check valve 15 closes the external heating steam valve 12, exits the heating system at the bottom of the boiler, and slightly opens the boiler to exhaust steam to the air according to the requirements of the boiler steam temperature and steam pressure rising speed to speed up the pressure increase and temperature rise;

j. When the main steam pressure of the boiler reaches 0.59Mpa and the main steam temperature is 190-205°C, close the electric main steam valve 17 of the turbine, open the drainage system 16 before the main steam valve of the turbine and the drainage system 18 of the turbine body, and the saturated steam generated by the steam drum 5 After being heated, it becomes superheated steam and sends it to the electric main steam valve 17 of the turbine, and the main steam pipeline is warmed through the drainage system 16 in front of the main steam valve of the turbine;

k． When the main steam heating pipe is qualified, and the steam pressure in front of the steam turbine electric main steam valve 17 is ≥1.2 MPa, the main steam temperature is ≥220°C, and the superheat is ≥50°C, the boiler is turned off to exhaust steam to the air to maintain stable combustion of the boiler and the main steam pressure and the temperature does not drop, the turbine slip parameters start the warm-up, when the turbine rushes to 400 r/min-500 r/min, listen to the sound and check the low-speed warm-up check for 5 minutes;

l. The steam turbine speeds up to 1200 r/min evenly within 10 minutes, and warms up at 1200 r/min for 30 minutes;

m. The speed of the steam turbine is increased from 1200 r/min to 3000 r/min at a constant speed within 20 minutes (when passing the critical speed of the steam turbine and power generation, it should be passed quickly and smoothly), and the warm-up inspection is carried out at 3000 r/min for 15 minutes. The generator 20 is connected to the grid for power generation;

n． Turn off the drainage system 18 of the steam turbine body. When the steam parameters and evaporation at the boiler outlet reach the rated value, the steam turbine just takes on the rated load. The start-up procedure of the sliding parameter will be started in 4 hours and the grid connection will be completed. Within 6 hours, it will warm up with load and have Full load condition.

Claims (10)

1. a kind of burning gas boiler steam turbine power generation Quick starting energy-saving device, it includes higher-pressure deaerator（1）, high pressure water pump （2）, high-pressure heater（3）, boiler body, the electronic main vapour valve of steam turbine（17）, steam turbine（19）, generator（20）, high pressure deoxygenation Device（1）Pass through pipeline and high pressure water pump（2）Connection, high pressure water pump（2）Pass through pipeline and high-pressure heater（3）Connection, it is high Press heater（3）It is connected by pipeline with the feed water system of boiler, the feed water system of boiler is connected by pipeline with boiler body, boiler Pass through jet chimney and the electronic main vapour valve of steam turbine（17）Connection, the electronic main vapour valve of steam turbine（17）Pass through jet chimney and steam turbine （19）Connection, steam turbine（19）With generator（20）It is connected, it is characterised in that：It also has instant starting boiler lower curtate heater （25）, instant starting boiler lower curtate heater（25）Including atmospheric type deaerator（10）, low pressure feed water pump（11）, external heat Steam valve（12）, steam heating gas-distributing cylinder（13）, steam heating dispense valve（14）, steam heating distribution check (non-return) valve（15）, Outside superheat steam pipeline passes through external heat steam valve（12）Gas-distributing cylinder is heated with steam（13）It is connected, steam heating point Cylinder（13）Pass through pipeline and atmospheric type deaerator respectively（10）, boiler water wall header（8）It is connected, in steam heating point vapour Cylinder（13）With boiler water wall header（8）Connecting pipe in be provided with steam heating dispense valve（14）Heat and distribute with steam Check (non-return) valve（15）.

2. burning gas boiler steam turbine power generation Quick starting energy-saving device according to claim 1, it is characterised in that：The pot Furnace body includes economizer（4）, drum（5）, down-comer（6）, water-cooling wall（7）, water-cooling wall header（8）With periodical blowdown valve（9）, They are attached by pressure piping.

3. burning gas boiler steam turbine power generation Quick starting energy-saving device according to claim 2, it is characterised in that：The vapour Machine body includes draining system before steam turbine stop valve（16）, the electronic main vapour valve of steam turbine（17）, steam turbine body draining system（18） And steam turbine（19）, they are attached by pressure piping.

4. burning gas boiler steam turbine power generation Quick starting energy-saving device according to claim 3, it is characterised in that：It is described fast Fast starting trouble lower curtate heater（25）Steam heating gas-distributing cylinder（13）Pressure gauge, thermometer and mating valve are installed, Steam heats gas-distributing cylinder（13）Bottom is installed by the steam trap connection to exclude condensate.

5. burning gas boiler steam turbine power generation Quick starting energy-saving device according to claim 4, it is characterised in that：It is described fast Fast starting trouble lower curtate heater（25）Atmospheric type deaerator（10）Water-level gauge, deoxygenation head and mating valve, pot are installed The smart desalted water pipeline of cold conditions passes through electrically operated valve group and atmospheric type deaerator outside stove（10）Connection, atmospheric type deaerator（10） Bottom passes through pipeline and valve group and low pressure feed water pump（11）Connection, low pressure feed water pump（11）Pass through pipeline and valve group and high pressure Oxygen-eliminating device（1）Connection, the periodical blowdown valve of boiler（9）Pass through pipeline and electrically operated valve group and atmospheric type deaerator（10）It is connected Connect.

6. a kind of burning gas boiler steam turbine power generation Quick starting energy-saving method of use said apparatus, it is characterised in that：It includes Following steps：

The first step, passes through atmospheric type deaerator（10）Low pressure recycle heating is carried out to boiler：

Gas-distributing cylinder is heated to steam（13）It is passed through outside superheated steam（24）, the smart desalted water of outside cold conditions（23）Send into air suspended type Oxygen-eliminating device（10）, open steam heating gas-distributing cylinder（13）Send and atmospheric type deaerator（10）Regulating valve, to atmospheric type deaerator （10）Smart desalted water（23）Carry out heating deoxygenation；Low pressure feed water pump（11）Water is sent to boiler, boiler water is heated to boiler plant, Boiler water after cooling passes through atmospheric type deaerator（10）Heat temperature raising, then by low pressure feed water pump（11）Water is sent to boiler, it is real Now to the low pressure thermal cycle of boiler, when boiler-steam dome wall temperature can reach 40 DEG C；

Second step, passes through high voltage type oxygen-eliminating device（）Low pressure recycle heating is carried out to boiler：

When boiler-steam dome wall temperature >=40 DEG C, to higher-pressure deaerator（1）Input heating steam, opens high pressure water pump（2）By height Press oxygen-eliminating device（1）Hot water passes through high-pressure heater（3）Boiler is sent into, atmospheric type deaerator is sent into after hot-water boiler heat release（10）, Pass through low pressure feed water pump again（11）Send into higher-pressure deaerator（1）Formed and the low-pressure heating of boiler is circulated, boiler-steam dome wall temperature can When reaching 80 DEG C；

3rd step, external steam is directly heated to boiler bottom：

External heat steam is dispensed valve by heating（14）With steam heating distribution check (non-return) valve（15）Keep heating into boiler Uniformly, when boiler-steam dome wall temperature can reach 100 DEG C；

4th step, steam turbine low pressure sliding parameter starts：

Boiler point coal gas, after gas-fired is stable, boiler pressure liter, drum（5）Become after the saturated vapor of generation is heated Superheated steam carries out heating coil to main steam line；After main steam heating coil is qualified, maintain boiler combustion stable, steam turbine sliding parameter is opened Warming-up is moved, steam turbine is reached after egulation rotating speed, generator（20）Generate electricity by way of merging two or more grid systems.

7. burning gas boiler steam turbine power generation Quick starting energy-saving method according to claim 6, it is characterised in that：Described One step comprises the following steps：

A. steam heating gas-distributing cylinder is opened（13）Drain valve, slow crack external heat steam valve（12）System is warmed up Pipe, after waiting heating coil qualified, when steam heats gas-distributing cylinder（13）Pressure it is big >=0.05MPa when, close drain valve；

B. it is slow to open external heat steam valve（12）Gas-distributing cylinder is heated to steam（13）Convey superheated steam（24）, work as steam Heat gas-distributing cylinder（13）Superheated steam pressure >=0.3MPa and superheat steam temperature >=150 DEG C it is normal after, turn down external heat Steam valve（12）, keep steam heating gas-distributing cylinder（13）Interior superheated steam pressure and temperature is stable；

C. by the smart desalted water of outside cold conditions（23）Atmospheric type deaerator is sent into by pipeline and electrically operated valve group（10）, and keep Liquid level is at 2/3；

D. steam heating gas-distributing cylinder is opened（13）With atmospheric type deaerator（10）Regulating valve, to atmospheric type deaerator（10）Interior Smart desalted water（23）Deoxygenation is heated, atmospheric type deaerator is kept（10）Interior coolant-temperature gage >=100 DEG C；

E. low pressure feed water pump is opened（11）Water is sent to boiler, hot water passes through economizer（4）Send into drum（5）, drum（5）Hot water is passed through Cross down-comer（6）And water cooler（7）It is sent to water-cooling wall header（8）, the coolant-temperature gage reduction after heat release, the heat in water is used for The metal temperature of heating boiler equipment, opens periodical blowdown valve（9）, the boiler water after reduction temperature is sent into atmospheric type deaerator （10）Water passes through low pressure feed water pump after heat temperature raising, heating（11）It is re-fed into boiler economizer（4）Form low pressure recycle heated Journey, according to atmospheric type deaerator（10）Interior temperature, adjusts atmospheric type deaerator（10）Quantity of steam is heated, remains at and works as air Formula oxygen-eliminating device（10）Interior coolant-temperature gage >=100 DEG C, low pressure recycle heating is carried out to steam generator system, and the time 1 low pressure recycle time is small When it is interior, when boiler-steam dome wall temperature can reach 40 DEG C.

8. burning gas boiler steam turbine power generation Quick starting energy-saving method according to claim 7, it is characterised in that：Described Two steps comprise the following steps：

F. when boiler-steam dome wall temperature >=40 DEG C, to higher-pressure deaerator（1）Input heating steam, keeps higher-pressure deaerator（1）'s Boiler economizer is sent in temperature >=150 DEG C of water, closing（4）Low pressure recycle penstock（21）, open cycle of higher pressure penstock（22）, Open high pressure water pump（2）From higher-pressure deaerator（1）Water is sent, by high-pressure heater（3）Send into boiler economizer（4）, hot water By economizer（4）Send into drum（5）, drum（5）Hot water passes through down-comer（6）, water cooler（7）, water-cooling wall header（8）With it is fixed Phase blowoff valve（9）Send into atmospheric type deaerator（10）, then by low pressure feed water pump（11）Send into higher-pressure deaerator（1）Form low pressure Heat cycles, are remained at when high voltage type oxygen-eliminating device（1）Interior coolant-temperature gage >=150 DEG C, carry out low pressure recycle to steam generator system and add Heat；

G. when boiler-steam dome wall temperature >=80 DEG C, boiler periodical blowdown valve is closed（9）, stop low pressure feed water pump（11）, stop high Press feed pump（12）, stop circulating-heating, boiler water filling to the minimum visible water-level of steam water-level meter, in 1 hour circulation time, pot When stove drum wall temperature can reach 80 DEG C.

9. burning gas boiler steam turbine power generation Quick starting energy-saving method according to claim 8, it is characterised in that：Described Three steps comprise the following steps：

H. slow unlatching steam heating is dispensed valve（14）, heat steam and dispensed valve by steam heating（14）With steam heating Distribute check (non-return) valve（15）Into water-cooling wall header（8）Homogeneous heating is kept, pipeline does not vibrate, control drum up-draft gasifier is little In 40 DEG C（National regulation）, steam heating gas-distributing cylinder（13）0.1 MPa is maintained at, strengthens heating；Treat that stove coolant-temperature gage rises to 100 DEG C or so, according to pipe vibration situation, slow standard-sized sheet external heat steam valve（12）, boiler bottom heating system is put into comprehensively Carry out comprehensively without fire boosting heating, in 1 hour, when boiler-steam dome wall temperature can reach 100 DEG C.

10. burning gas boiler steam turbine power generation Quick starting energy-saving method according to claim 9, it is characterised in that：It is described 4th step comprises the following steps：

I. boiler point coal gas, after gas-fired is steadily determined, because pot in-furnace temperature is up to more than 100 DEG C, accelerate the rate of rise, Boiler pressure is directly raised to 0.49MPa, and when drum pressure is more than 0.5MPa, steam off heating is dispensed valve（14）And steam Heating distribution check (non-return) valve（15）, close external heat steam valve（12）, boiler bottom heating system is exited, according to boiler vapour Temperature, the requirement of the vapour pressure rate of climb, the crack boiler that opens accelerate boosting heating to idle discharge vapour；

J. when the main steam pressure of boiler reaches 0.59Mpa, 190~205 DEG C of main steam temperature closes the electronic main vapour valve of steam turbine tight （17）, open draining system before steam turbine stop valve（16）With steam turbine body draining system（18）, drum（5）The saturated vapor of generation Become superheated steam after heated and deliver to the electronic main vapour valve of steam turbine（17）Before, pass through draining system before steam turbine stop valve（16）It is right Main steam line carries out heating coil；

K. after main steam heating coil is qualified, and the electronic main vapour valve of steam turbine（17）The MPa of preceding steam pressure >=1.2, Stream temperature degree >= 220 DEG C, the degree of superheat >=50 DEG C when, boiler is closed to idle discharge vapour, maintains boiler combustion stable, main steam pressure and temperature not under Fall, steam turbine sliding parameter starts warming-up, when the r/min auditions of steam turbine red switch to 400 r/min~500 check that low speed warming checks 5 points Clock；

L. uniform raising speed is checked 30 minutes to 1200 r/min, and in 1200 r/min warming-ups in steam turbine 10 minutes；

M. in steam turbine 20 minutes rotating speed from 1200 r/min at the uniform velocity raising speeds to 3000 r/min（Cross steam turbine and generating critical speed When, quick and stable to pass through）, and checked 15 minutes in 3000 r/min warming-ups, generator（20）Generate electricity by way of merging two or more grid systems；

N. steam turbine body draining system 18 is closed, when boiler export steam parameter and evaporation reach rated value, steam turbine Just take rated load, sliding parameter startup program again 4 hours start it is grid-connected complete, on-load warming-up and have in 6 hours Standby operating mode at full capacity.