阅读说明：本技术 一种用于燃气轮机的脉冲喷吹装置 (Pulse injection device for gas turbine ) 是由 杨晓光 王燎峰 刘世祥 张程 张帆 徐飞然 刘毅 王建平 陈毅 于 2021-08-17 设计创作，主要内容包括：一种用于燃气轮机的脉冲喷吹装置,包括过滤器单元,所述过滤器单元内设有滤筒,滤筒上方设有喷管,滤筒下方设有翻板加热器,所述翻板加热器与固定安装在过滤器单元内的气缸连接,所述气缸经电磁阀与PLC控制系统连接,所述PLC控制系统还分别与脉冲阀、露点仪、温湿度计、差压变压器连接,所述差压变压器分别与置于滤筒上下两端的2个感压膜片连接,所述喷管与置于过滤器单元外部的脉冲阀连接,所述电磁阀和脉冲阀均与压缩空气连接。该装置可根据不同气象条件按不同的喷吹模式启动,使空气过滤器在雨雪雾等气象条件下也能正常运行,有效保障燃气轮机的安全运行,具有喷吹效果好、环境适应性强、节能的特点。(The utility model provides a pulse jetting device for gas turbine, includes filter unit, be equipped with in the filter unit and strain a section of thick bamboo, strain a section of thick bamboo top and be equipped with the spray tube, strain a section of thick bamboo below and be equipped with and turn over the board heater, turn over the board heater and be connected with the cylinder of fixed mounting in filter unit, the cylinder is connected through solenoid valve and PLC control system, PLC control system still is connected with pulse valve, dew point meter, warm and humid acidimeter, differential pressure transformer respectively with arrange in and strain 2 pressure sensing diaphragms at a section of thick bamboo upper and lower both ends and be connected, the spray tube is connected with arranging the outside pulse valve of filter unit in, solenoid valve and pulse valve all are connected with compressed air. The device can be started according to different meteorological conditions and different blowing modes, so that the air filter can normally operate under meteorological conditions such as rain, snow, fog and the like, the safe operation of the gas turbine is effectively guaranteed, and the device has the characteristics of good blowing effect, strong environmental adaptability and energy conservation.)

1. The utility model provides a pulse injection device for gas turbine, includes filter unit (10), its characterized in that, be equipped with in filter unit (10) and strain a section of thick bamboo (3), strain a section of thick bamboo (3) top and be equipped with spray tube (2), strain a section of thick bamboo (3) below and be equipped with turn over plate heater (4), turn over plate heater (4) and be connected with cylinder (5) of fixed mounting in filter unit (10), cylinder (5) are connected with PLC control system (7) through solenoid valve (11), PLC control system (7) still are connected with pulse valve (1), dew point hygrometer (6), hygrothermograph (8), differential pressure transformer (9) respectively with arrange 2 pressure sensing membrane (12) of straining a section of thick bamboo (3) upper and lower reaches in and be connected, spray tube (2) are connected with pulse valve (1) of arranging filter unit (10) outside in, the electromagnetic valve (11) and the pulse valve (1) are both connected with compressed air.

2. The pulse blowing device for a gas turbine according to claim 1, characterised in that the flap heater (4) comprises a rotary shaft (401), a flap (402) and a connecting rod (403), one end of the flap (402) being connected to the rotary shaft (401), the other end of the flap (402) being connected to the connecting rod (403), the connecting rod (403) being connected to the output of the cylinder (5).

3. The pulse blowing device for the gas turbine as claimed in claim 1, wherein there are a plurality of rotating shafts (401) and turning plates (402), one end of each of the turning plates (402) is correspondingly connected to the plurality of rotating shafts (401), and the other end of each of the turning plates (402) is connected to a connecting rod (403).

4. The pulse blowing device for a gas turbine as claimed in claim 1, characterised in that the flap heater (4) is disposed at the inlet air in the filter unit (10); a heater is integrally installed in a turning plate (402) of the turning plate heater (4), and the heater and the turning plate (402) form an integral structure; the heating forms of the heater include, but are not limited to, electric heating, steam heating, and compressor bleed air heating.

Technical Field

The invention relates to a pulse injection device for a gas turbine.

Background

The gas turbine is one of internal combustion engines, and converts internal energy of fuel into electric energy by combusting the fuel and pushing an impeller to rotate and generate electricity by air compressed by an air compressor. In the process of energy conversion, a gas turbine sucks a large amount of air, and dust and pollutants in the air make the gas turbine be easily damaged by erosion, scaling, melting, corrosion and the like, so that serious consequences such as rotor thermal unbalance vibration, creep deformation and fracture of turbine blades, thermal coating abrasion, blade abrasion, combustor part burning loss and the like are caused. At present, a gas turbine adopts a mode of arranging a plurality of filters in front of a compressor to purify air, and requires long-time continuous operation. One of the common forms is to configure a set of pulse blowing devices to blow off dust accumulated on filter cartridges, so as to prolong the service life of the filter cartridges and ensure long-term stable operation of a gas turbine generator set. The typical control modes are three, one is manual opening; one is timing start; one is to arrange a detection device for detecting the pressure difference between the upstream and the downstream of the filter, and when the pressure difference reaches a set value, pulse back blowing is started. The common defects of the methods are poor reliability and energy conservation, and particularly when the high-humidity environment such as rain, snow or haze is met, water vapor can be condensed on the filter cylinder and is fused with accumulated dust to form paste or even ice, so that the power of the filter cylinder rapidly rises, pulse injection cannot blow off, and the resistance of the gas turbine rapidly rises to a trip set value, so that a production stop accident is caused.

Disclosure of Invention

The invention aims to provide a pulse injection device for a gas turbine, which can ensure that an air filter can normally operate under meteorological conditions such as rain, snow, fog and the like, and effectively ensure the safe operation of the gas turbine, so as to solve the problems in the background technology.

The technical scheme who takes for realizing above-mentioned purpose is, a pulse injection device for gas turbine, including the filter unit, be equipped with in the filter unit and strain a section of thick bamboo, strain a section of thick bamboo top and be equipped with the spray tube, strain a section of thick bamboo below and be equipped with the turn-over plate heater, the turn-over plate heater is connected with the cylinder of fixed mounting in the filter unit, the cylinder is connected with PLC control system through the solenoid valve, PLC control system still is connected with pulse valve, dew point meter, warm and humid acidimeter, differential pressure transformer respectively with arrange in and strain 2 pressure sensing diaphragm in the section of thick bamboo upper and lower reaches and be connected, the spray tube is connected with the pulse valve of arranging the filter unit outside in, solenoid valve and pulse valve all are connected with compressed air.

Furthermore, the turnover plate heater comprises a rotating shaft, a turnover plate and a connecting rod, wherein one end of the turnover plate is connected with the rotating shaft, the other end of the turnover plate is connected with the connecting rod, and the connecting rod is connected with the output end of the air cylinder.

Furthermore, the rotating shaft and the turning plates are provided with a plurality of rotating shafts, one ends of the turning plates are correspondingly connected with the rotating shafts, and the other ends of the turning plates are connected with the connecting rods.

Further, the flap heater is arranged at the air inlet in the filtering unit; the heater is integrally installed in a turning plate of the turning plate heater, and the heater and the turning plate form an integral structure; the heating forms of the heater include, but are not limited to, electric heating, steam heating, and compressor bleed air heating.

Advantageous effects

Compared with the prior art, the invention has the following advantages.

1. The invention has the functions of heating and drying, turning over the board and turning over the throttle and pulse injection, etc., can be started according to different meteorological conditions and different injection modes, make the air filter can operate normally under the meteorological conditions such as rain, snow, fog, etc., guarantee the safe operation of the gas turbine effectively;

2. the invention is suitable for various types of gas turbines, and has the advantages of good blowing effect, strong environmental adaptability and energy saving.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the flap heater of the present invention.

FIG. 3 is a control flow chart of the present invention.

Detailed Description

The invention is further described with reference to the following examples and the accompanying drawings.

As shown in fig. 1 and 2, a pulse injection device for a gas turbine includes a filter unit 10, a filter cartridge 3 is arranged in the filter unit 10, a spray pipe 2 is arranged above the filter cartridge 3, a turning plate heater 4 is arranged below the filter cartridge 3, the turning plate heater 4 is connected with a cylinder 5 fixedly installed in the filter unit 10, the cylinder 5 is connected with a PLC control system 7 through an electromagnetic valve 11, the PLC control system 7 is further connected with a pulse valve 1, a dew point meter 6, a hygrothermograph 8 and a differential pressure transformer 9, the differential pressure transformer 9 is connected with 2 pressure sensing diaphragms 12 arranged on the upper and lower streams of the filter cartridge 3, the spray pipe 2 is connected with the pulse valve 1 arranged outside the filter unit 10, and the electromagnetic valve 11 and the pulse valve 1 are both connected with compressed air.

The flap heater 4 comprises a rotating shaft 401, a flap 402 and a connecting rod 403, wherein one end of the flap 402 is connected with the rotating shaft 401, the other end of the flap 402 is connected with the connecting rod 403, and the connecting rod 403 is connected with the output end of the cylinder 5.

The rotating shaft 401 and the turning plates 402 are respectively provided with a plurality of rotating shafts 401, one ends of the turning plates 402 are correspondingly connected with the rotating shafts 401, and the other ends of the turning plates 402 are respectively connected with the connecting rods 403.

The flap heater 4 is arranged at the air inlet in the filtering unit 10; the heater is integrated in the turning plate 402 of the turning plate heater 4, and the heater and the turning plate 402 form an integral structure; the heating forms of the heater include, but are not limited to, electric heating, steam heating, and compressor bleed air heating.

In the present invention, the filter unit 10 can be used in combination of a plurality of units; the flap heater 4 consists of a rotating shaft 401, a flap 402 and a connecting rod 403, and a heater is integrated in the flap 402; the connecting rod 403 is connected with the cylinder 5 and can drive the turning plate 402 to turn along the rotating shaft 401.

The invention has the functions of heating and drying, turnover plate turning and throttling, pulse blowing and the like, and the pressure difference value is preset: Δ p1 < Δ p2, and pulse blowing can be started according to different weather conditions and different blowing modes, wherein the blowing modes include a first mode and a second mode, and the control flow is shown in fig. 3:

the first mode is as follows: starting when the following environmental conditions are met.

t_{Dew point}Not more than 0 ℃ or t_{Environment(s)}-t_{Dew point}≤5°C；

In the first mode, when the detected pressure difference delta p reaches the preset value delta p1, the turning plate heater starts the heating time T, and meanwhile, the air cylinder 5 drives the turning plate heater 2 to rotate to enable the angle alpha to reach the preset angle alpha₁And the PLC control system 7 starts the pulse valve 1 to enable the airflow to be sprayed out from the spray holes on the spray pipe 2 to the filter cartridge 3, so that dust in the filter cartridge 3 is blown off, and the self-cleaning process is completed.

The mode is a mode for coping with a high-humidity environment, when the environment condition is met, heating is started firstly, the relative humidity of inlet air is reduced, and the moisture of the filter cylinder is dried, so that dust is easy to blow off; secondly, the turning plate heater is turned over, so that the air enters after turning, and the turning plate heater has two benefits, on one hand, partial moisture in the air is separated through turning of the air, on the other hand, the air inlet resistance of the unit is improved, more air enters from other units, so that the air inlet flow of the unit is reduced, and dust is blown off more easily during blowing; thirdly, the preset value delta p1 is less than delta p2, so that the blowing system can blow back in advance compared with the mode II, and the trip fault caused by rapid rise of pressure difference can be avoided more easily.

And a second mode: starting a second mode when the environmental condition of the first mode is not met;

in the second mode, when the detected pressure difference delta p reaches the preset value delta p2, the heating is not started, and the air cylinder 5 drives the turning plate heater 2 to rotate to enable the angle alpha to reach the preset angle alpha₁And the PLC control system 7 starts the pulse valve 1 to enable the airflow to be sprayed out from the spray holes on the spray pipe 2, so that the dust of the filter cartridge 3 is blown off, and the self-cleaning process is completed.

The heater is not started in the mode, so that the energy consumption of the system is reduced; the turnover plate is turned over to improve the blowing effect, the preset value delta p2 is more than delta p1, the blowing frequency is further reduced, and the energy consumption is reduced.

When the pulse blowing is not started, the turnover angle alpha =90 degrees and the turnover panel is in a fully opened state, and at the moment, the air inlet resistance is lowest, so that the energy-saving and energy-consumption effects are achieved. Because some dust can not be blown off after each blowing, the preset angle alpha can be a plurality of angles through the further invention, the corresponding value K = resistance after blowing/resistance before blowing, and when the value K is smaller than the threshold value Ki, the corresponding turning angle alpha i is obtained. During initial use, jetting is effectual, and the K value is less, can overturn less angle of predetermineeing, along with the K value constantly promotes in the use, and rotation angle constantly increases is favorable to promoting jetting effect, increase of service life. When the K value reaches a certain higher set value Ks, the effect of recovering the performance of the filter cylinder through blowing is very poor, and a filter cylinder replacement signal can be sent at the moment, so that early warning is facilitated, and the filter cylinder can be replaced in time when production is stopped.