CN202281223U

CN202281223U - Control valve unit device for coal water slurry combustor

Info

Publication number: CN202281223U
Application number: CN2011204147100U
Authority: CN
Inventors: 杨文学
Original assignee: SHANGHAI XIANENG NEW ENERGY TECHNOLOGY CO LTD
Current assignee: SHANGHAI XIANENG NEW ENERGY TECHNOLOGY CO LTD
Priority date: 2011-10-27
Filing date: 2011-10-27
Publication date: 2012-06-20
Anticipated expiration: 2021-10-27

Abstract

The utility model relates to a control valve unit device for a coal water slurry combustor, which comprises a light oil combustion valve unit, a coal water slurry combustion valve unit, a mixed combustion valve unit, an automatic online cleaning spray gun and a pipeline valve unit. One end of a light oil tank is sequentially connected with a ball valve, a filter, a high pressure oil pump and a pressure gauge, the outside of the light oil tank is connected with a light oil gun through an electromagnetic valve, a hearth above the light oil gun is respectively provided with an igniter electrode and a coal water slurry gun, a flame detection unit is positioned under the coal water slurry, and a hearth negative pressure detection unit and a hearth temperature detection unit are respectively arranged on the hearth above the light oil gun. The control valve unit device for the coal water slurry combustor has the advantages of being favorable of enlarging load adjusting range of a boiler, meeting different load requirements, being capable of timely adjusting air output and air induced quantity, being capable of achieving full and economical combustion when the load of the boiler is different and guaranteeing clean and safe combustion, being capable of adjusting medium flow, and greatly reducing fluctuation of medium temperature of coal water slurry boilers.

Description

A kind of control valve group device that is used for water coal slurry burner

Technical field

The utility model relates to the coal water slurry boiler device, relates in particular to a kind of control valve group device that is used for water coal slurry burner.

Background technology

The existing industry coal water slurry boilers such as polyester, section, dyeing and finishing that are used for; According to general principle of design; Its combustion process will keep rational wind slurry to cooperate; Reasonably primary and secondary air cooperate with rationally give, air inducing cooperates, also requires the fire box temperature that keeps suitable, the cooperation of so-called reasonably wind slurry will keep the excess air coefficient of the best exactly; Reasonably primary and secondary air cooperate be exactly guarantee to catch fire rapidly, stable and fully burning, reasonably send, air inducing cooperates and will keep suitable combustion chamber draft exactly; When operating condition changed, these cooperated control proper, just can reduce combustible loss, improve boiler efficiency.Whether normal for combustion conditions; Also tackle flame and observe judgement: during the normal and stable burning; Golden yellow flame, the heat color that has light in the stove stablized, flame is even and be full of the combustion chamber; But the water-cooling wall around not touching, flame kernel is at the middle part, combustion chamber, and the flame bottom is not less than half degree of depth of furnace hopper; Ignition point should be apart from the not far place of burner; The water-coal-slurry that do not have in flame segregation, the tangible asterism that also do not have (have asterism represent furnace temperature cross low or the slurry grain too thick); To cause the fluctuation of steam parameter like the combustion process shakiness; Even causing the burner hearth fire-putting-out emergency, the too high or flame kernel deflection of fire box temperature will cause water-cooling wall and the slagging scorification of furnace outlet heating surface, and may strengthen the thermal deviation of superheater; Local overtemperature of tube wall; Even booster, so whether burning control successfully concerns combustion conditions whether stablize, be the essential condition of monoblock safe and reliable operation.Therefore; When the designed combustion Process Control System is accomplished above-mentioned task; Usually select fuel quantity, air output and air inducing amount as controlled quentity controlled variable; Select boiler load or vapour pressure, flue gas oxygen content or excess air coefficient, combustion chamber draft as controlled volume, each control section should be furnished with control corresponding valve group and accomplish entire work process.

Summary of the invention

To above defective; The utility model provides a kind of regulation quality that helps improving system, the air output of boiler is coordinated with fuel quantity mutually, can satisfy the control valve group device that is used for water coal slurry burner for the different needs of temperature, thereby realizes the control optimization of fuel quantity, air quantity, medium temperature and reach the excellent control of coal water slurry boiler combustion process.

For realizing above-mentioned purpose, the utility model adopts following technical scheme:

A kind of control valve group device that is used for water coal slurry burner; Comprise light oil combustion valve group, cool water mixture burning valve group, mixed combustion valve group, automatic on-line cleaning spray gun and pipeline valve group; Light oil combustion valve group wherein comprises light oil case, ball valve, filter, high-pressure oil pump, Pressure gauge, magnetic valve; Automatic on-line cleaning spray gun wherein and pipeline valve group comprise air door executing agency, water-coal-slurry rifle, combustion chamber draft detecting unit, fire box temperature detecting unit, ignitor and light oil rifle; A said light oil case wherein end is connected to ball valve, filter, high-pressure oil pump, Pressure gauge successively; This light oil case is outside to be connected with the light oil rifle of automatic on-line cleaning spray gun and pipeline valve group through magnetic valve; Said light oil rifle both sides are provided with ignitor and water-coal-slurry rifle respectively, are positioned at water-coal-slurry rifle below and are provided with flame detection unit, are positioned at the ignitor top and are provided with air door executing agency; Said light oil rifle top burner hearth is provided with combustion chamber draft detecting unit and fire box temperature detecting unit respectively.

Compared with prior art, the described beneficial effect that is used for the control valve group device of water coal slurry burner of the utility model is:

(1) helps adding the load regulation range of cauldron, can satisfy 30%-120% workload demand;

(2) can in time regulate air output and air inducing amount, it is asynchronous fully and economical combustion and guarantee the sanitary safe burning to satisfy boiler load;

(3) but the real-time regulated rate-of flow, thereby reduced the medium temperature fluctuation of combusting coal water slurry boiler greatly, make coal water slurry boiler can be widely used in industries such as the exigent polyester of temperature stability, section, dyeing and finishing.

Description of drawings

According to accompanying drawing the utility model is done further explain below.

Fig. 1 is the said structural representation that is used for the control valve group device of water coal slurry burner of the utility model embodiment.

Among the figure:

1, light oil case; 2, ball valve; 3, filter; 4, high-pressure oil pump; 5, Pressure gauge; 6, magnetic valve; 7, automatic pressure detecting unit; 8, two five ports valves; 9, air door executing agency; 10, automatic flow meter; 11, water-coal-slurry rifle; 12, pneumatic actuator; 13, automatic pressure regulator; 14, combustion chamber draft detecting unit; 15, fire box temperature detecting unit; 16, flame detection unit; 17, ignitor; 18, light oil rifle; 19, pneumatic operated valve.

The specific embodiment

As shown in Figure 1; The described control valve group device that is used for water coal slurry burner of the utility model embodiment; Comprise light oil combustion valve group, cool water mixture burning valve group, mixed combustion valve group, automatic on-line cleaning spray gun and pipeline valve group; These several parts are connected and composed by corresponding assembly respectively; Light oil combustion valve group wherein comprises light oil case 1, ball valve 2, filter 3, high-pressure oil pump 4, Pressure gauge 5, magnetic valve 6, automatic pressure detecting unit 7; Cool water mixture burning valve group wherein comprises automatic flow meter 10, some pneumatic operated valves 19, some Pressure gauges 5, automatic pressure regulator 13 and pressure detecting part, and automatic on-line cleaning spray gun wherein and pipeline valve group comprise two five ports valves 8, air door executing agency 9, water-coal-slurry rifle 11, pneumatic actuator 12, combustion chamber draft detecting unit 14, fire box temperature detecting unit 15, ignitor 17 and light oil rifle 18; Said light oil case 1 a wherein end is connected to ball valve 2, filter 3, high-pressure oil pump 4, Pressure gauge 5 successively; This light oil case 1 outside magnetic valve 6 that passes through is connected with the light oil rifle 18 of automatic on-line cleaning spray gun and pipeline valve group; Said light oil rifle 18 both sides are provided with ignitor 17 and water-coal-slurry rifle 11 respectively; Be positioned at water-coal-slurry rifle 11 belows and be provided with flame detection unit 16, be positioned at ignitor 17 tops and be provided with air door executing agency 9; Said light oil rifle 18 top burner hearths are provided with combustion chamber draft detecting unit 14 and fire box temperature detecting unit 15 respectively.

The described control valve group device that is used for water coal slurry burner of above the utility model embodiment, its operation principle is following:

1. light oil combustion valve group: under the prerequisite that conduction oil circulating pump, air blast, air-introduced machine are opened, press the burning starting switch, after program is received enabling signal, the light oil pump startup; The fuel feed pump threeway is regulated ball valve and is opened, and filter cuts out, and the oil return pipe magnetic valve is opened, the light oil circulation; Utilize light oil pressure transmitter control threeway to regulate ball valve, make light oil pressure stability 0.8Mpa, after the time was controlled at about 1 minute, light oil rifle cylinder was given and is entered assigned address; The burning torch cylinder is entered assigned address, and filter (little fire) is opened, oil return pipe closed electromagnetic valve, high-tension ignition simultaneously; Be controlled at the duration of ignition 3 to 5 seconds, the flame detection signal feeds back to the control system immediately, as the success of lighting a fire, and the burning torch cylinder returns to assigned address; Burn after 1 minute, wind of burner opens 50%, and secondary wind is closed, and magnetic valve (big fire) is opened; Big fire combustion furnace hall temperature reaches the temperature (350 ℃) (mixing the combustion temperature sets) that coal slurry mixes combustion always in program, like loss of ignition, the control system closes the fuel feed pump magnetic valve moment in the time of setting, and opens the oil return pipe magnetic valve; Guarantee negative pressure state (under the prerequisite that boiler drum, air-introduced machine are not activated, being forbidden to open the burner auto-programming) in the burner hearth simultaneously; Let the light oil circulation after about 1 minute, beginning is start-up routine for the second time, till lighting a fire successfully.

2. light oil and water-coal-slurry mixed combustion valve group: when light oil normal combustion, fire box temperature reach when mixing 350 ℃ of combustion temperature, mix the combustion program and receive enabling signal, water-coal-slurry rifle cylinder is entered assigned address automatically, lets the water-coal-slurry circulation after 5 minutes; Wind of burner opens 50%, and secondary wind opens 50%, and compressed air valve is opened the compressed air that drops into 0.1 Mpa simultaneously, waits for 10 seconds; Drop into water-coal-slurry and mix so, the while pneumatic operated valve opens the purging return pipe and cuts out after 1 minute, fails if throw mixed combustion of slurry, and at this moment flame detects does not have signal; The instantaneous light solenoid is closed, and lets the light oil circulation wait for new igniting task after 1 minute, and the water-coal-slurry pneumatic operated valve cuts out in the time of the light oil closed electromagnetic valve, and the light oil ignition procedure begins to start after 2 minutes; When throw starch successfully burnt 1 minute after, compressed air pressure rises to 0.3Mpa, along with the rising of fire box temperature, throws the slurry amount according to the rising of fire box temperature rise (changing slurry amount setting analog function according to fire box temperature); Reach the specified slurry amount of boiler, the while compressed air pressure also should rise to 0.8 Mpa according to the rising of slurry amount always, and (compressed air set basis slurry amount rises, until 0.8Mpa reduces like amount of pulp always; Compressed air pressure does not allow and then slurry amount downward modulation and reduces) when fire box temperature reaches 650 ℃, the light oil closed electromagnetic valve, light oil pressure is lowered to 0.5 Mpa simultaneously; Auxiliary cool water mixture burning, when fire box temperature reached 800 ℃, the light oil system closing withdrawed from playback automatically; After stopping like light oil, cool water mixture burning is unsuccessful, after moment, program was received the fire extinguishing signal; The return pipe pneumatic operated valve is opened, and the flow inlet pneumatic operated valve cuts out, and lets water-coal-slurry circulate; Compressed air valve works on, and plays the effect that purges gun barrel, and water valve opens (cutting out after 20 seconds) simultaneously; Compressed air valve is opened after 1 minute and is closed, and purging work is accomplished, and receives cool water mixture burning procedure failure signal after 1 minute in oil drop fire program; The fiery program of oil drop is startup oil drop fire automatically, comprises that the mixed combustion program of water-coal-slurry of back follows up automatically, that is to say when for the first time fiery from oil drop; Coal slurry can repeat all programs after mixing all right procedure failures automatically, till the normal back of coal slurry burning.

3. cool water mixture burning valve group: when mixed combustion program normal termination, the light oil system withdraws from, during the water-coal-slurry normal combustion; Fire box temperature continues to rise, and explains that cool water mixture burning is normal, according to the operating position of boiler; Set conduction oil temperature/steam pressure as the control datum mark; Regulate the normal amount of using of boiler operatiopn load and water-coal-slurry, the water-coal-slurry amount is found automatically and the balance of the control datum mark set, that is to say according to the load of setting to make the water-coal-slurry amount find equalization point automatically.

4. automatic on-line cleaning spray gun and pipeline valve group: at first switch board is provided with ignition starting switch and shutdown switch, when boiler is wanted blowing out, presses shutdown switch, after program is received stop signal; Time, the return pipe pneumatic operated valve was opened about 5 seconds, and the flow inlet pneumatic operated valve cuts out and stops to supply slurry simultaneously; The water-coal-slurry inner loop; Compressed air valve and purging pneumatic operated valve, water valve is opened to maximum pressure, remaining water-coal-slurry in the scavenging conduit simultaneously automatically; Purge time is closed after about 1 minute automatically, and the slurry rifle withdraws from automatically.

Claims

1. control valve group device that is used for water coal slurry burner; Comprise light oil combustion valve group, cool water mixture burning valve group, mixed combustion valve group, automatic on-line cleaning spray gun and pipeline valve group; Light oil combustion valve group wherein comprises light oil case (1), ball valve (2), filter (3), high-pressure oil pump (4), Pressure gauge (5), magnetic valve (6); Automatic on-line cleaning spray gun wherein and pipeline valve group comprise air door executing agency (9), water-coal-slurry rifle (11), combustion chamber draft detecting unit (14), fire box temperature detecting unit (15), ignitor (17) and light oil rifle (18); It is characterized in that: said light oil case (a 1) wherein end is connected to ball valve (2), filter (3), high-pressure oil pump (4), Pressure gauge (5) successively; This light oil case (1) is outside to be connected with the light oil rifle (18) of automatic on-line cleaning spray gun and pipeline valve group through magnetic valve (6); Said light oil rifle (18) both sides are provided with ignitor (17) and water-coal-slurry rifle (11) respectively; Be positioned at water-coal-slurry rifle (11) below and be provided with flame detection unit (16), be positioned at ignitor (17) top and be provided with air door executing agency (9); Said light oil rifle (18) top burner hearth is provided with combustion chamber draft detecting unit (14) and fire box temperature detecting unit (15) respectively.