CN102874508A

CN102874508A - Intelligent blocking cleaning nozzle-containing blade rotating solid material conveying method

Info

Publication number: CN102874508A
Application number: CN2012102051615A
Authority: CN
Inventors: 程晓堂
Original assignee: 程晓堂
Current assignee: Shandong plain energy saving equipment Co., Ltd.
Priority date: 2012-06-19
Filing date: 2012-06-19
Publication date: 2013-01-16
Anticipated expiration: 2032-06-19
Also published as: CN102874508B

Abstract

The invention provides a solid material conveying method which adopts solid material conveying equipment, wherein the equipment comprises at least one tapered hopper; the tapered hopper comprises an upper part feeding section and a lower part discharging section; a blade is arranged in the lower part feeding section; a clearance is formed between the blade and the internal wall of the lower part discharging section; the blade is connected with a rotating shaft and is rotated through the rotating shat, thus, the blade has a nozzle for jetting gas to an internal wall of the lower part discharging section; flow measuring equipment is arranged at an outlet section of the lower part discharging section; when flow is reduced in a certain amount by being measured via the flow measuring equipment, the rotating shaft can be started; the rotating shaft can be started only; or the rotating shaft and the nozzle of the blade can be synchronously started. With the adoption of the method provided by the invention, anti-blocking efficiency can be improved, and energy consumption can be reduced.

Description

The nozzle blade that contains of intelligence block clearing rotates the solid material carrying method

Technical field

The invention belongs to the solid material transportation art, be specifically related to a kind of solid material carrying method with intelligent block clearing and/or choke preventing function, particularly a kind of solid material carrying method that when carrying along gravitational field, has intelligent block clearing and/or choke preventing function.

Background technology

At present, the solid material conveying is very general process in chemical industry, field of boilers, and wherein the vertical transport of solid material is modal process.In general, carry in order to save energy along the solid material of gravitational field, all be rely on gravity carry out solid material freely descend carry.Solid material load transfer device along gravitational field comprises at least one broach hopper, and this broach hopper comprises top material loading section and bottom blanking section.Although the outlet size of blanking section much larger than the particle diameter of powder, still might form bridge formation when the whole discharging downwards of solid material.This obstruction can cause the fault of load transfer device, and then has influence on the fault of whole system.The major cause that results in blockage is such as having friction force between solid material and the equipment inner wall, having friction force etc. between the solid material.In order to prevent latch up phenomenon, corresponding block clearing and/or anti-block apparatus must be set in load transfer device.

For many years, in order to solve blockage problem, developed vibration or beaten the methods such as inwall, rotation scraping inwall, gas injection inwall.200810140442.0 proposed the equipment of rotary conic hopper stationary blade, 201020262144.1 proposed the fixedly equipment of broach hopper of rotating blade, although these two kinds of equipment can reach the effect that prevents from stopping up, it is all higher that but it prevents from stopping up the energy consumption that needs, and still needs a kind of solid material carrying method of stopping up of preventing efficiently.

Summary of the invention

Blockage problem when carrying in order to solve powder material, the design people provides a kind of powder load transfer device and method with block clearing and/or choke preventing function.

Solid material carrying method proposed by the invention, use the solid material load transfer device, described equipment is drawn together at least one broach hopper, this broach hopper comprises top material loading section and bottom blanking section, has blade in the bottom blanking section, and blade and bottom blanking section inwall have a fixed gap, blade is connected with S. A., by S. A. rotation, blade has the nozzle of subordinate's section of expecting inwall jet gas down, has flow measurement at the outlet section of bottom blanking section;

The flow that measures when flow measurement drops to when a certain amount of, starts S. A., can only start S. A., also can start simultaneously the nozzle of S. A. and blade.

Wherein, be connected with pressure sensor at least one blade, preferably be connected with pressure sensor at each blade.

Wherein, the space of blade and bottom blanking section inwall accounts for the 0.3-10% of bottom blanking section inwall radius, preferred 1.0%-6.6%, more preferably 1.6%-3.3%.

Wherein, blade is identical everywhere with the space of bottom blanking section inwall; Perhaps, the space of blade and bottom blanking section inwall reduces from top to bottom gradually.

Wherein, blade plan form can be in the shape of a spiral, straight tabular or swash plate shape.

Wherein, the nozzle Jet with downward flow direction gas on the blade.

Wherein, the nozzle on the blade and horizontal sextant angle are 15-95 °, preferred 35-75 °, and more preferably 55-75 °, most preferably 75 °.

The flow that measures when flow measurement drops to when a certain amount of, starts S. A., can only start S. A., also can start simultaneously the nozzle of S. A. and blade.Also can only start all the time S. A., also can start simultaneously all the time the nozzle of S. A. and blade

According to the character of powder material the condition of startup is set, in general when flow drops to the 80%-40% of normal discharge, starts anti-blocking equipment, reduction energy consumption that can maximal efficiency.Carry for power plant boiler fine coal, in general when flow drop to normal discharge 70% the time startup; And for the fly ash carry of flying dust treating system, in general when flow drop to normal discharge 50% the time start.

Equipment of the present invention is judged stopping state by discharge measurement, selects start anti-block apparatus suitable opportunity, has improved anti-blocking efficient, has reduced energy consumption.At blade nozzle is set, in the rotation of bottom blanking section, sprays, improved anti-blocking efficient, reduced energy consumption.Adjust the spray angle of blade top nozzle, improved anti-blocking efficient, reduced energy consumption.

In real-world operation; resistance between blade and the solid material is very large; the problems such as blade often can become flexible, disconnect, comes off; in case generation the problems referred to above; not only can cause blocking-proof result obviously to descend; also may damage the parts such as hopper, therefore must in time find the problems referred to above, and immediately maintenance.The present invention can detect in real time the situation of blade, thereby solve the problems referred to above by pressure sensor is set.

Description of drawings

Fig. 1 represents the structural representation of this equipment.

The specific embodiment

This equipment is referring to Fig. 1.Its structure comprises: at least one broach hopper, this broach hopper comprise top material loading section 1 and bottom blanking section 2, have blade 4 in bottom blanking section 2.Blade has the nozzle (not shown in FIG.) of subordinate's section of expecting inwall jet gas down.Nozzle Jet with downward flow direction gas on the blade.Outlet section in bottom blanking section has flow measurement 5, and blade plan form is the swash plate shape.Blade 4 is connected with S. A. 3, rotates by S. A..Be connected with the pressure sensor (not shown in FIG.) at each blade 4.

When the conveying powder material, flow measurement 5 measuring flows change, and when flow drops to when a certain amount of, start S. A. 3; When starting S. A. 3, the nozzle that can start blade 4 also can not start the nozzle of blade 4, thereby prevents that efficiently powder material from stopping up.Pressure sensor on the blade is worked all the time, becomes flexible, disconnects, comes off etc. when unusual if find blade, can report to the police, and as early as possible blade is repaired.

Embodiment 1:

Take fine coal as example, when flow drop to normal discharge 70% the time start S. A. 3 (not starting the nozzle of blade), the space of blade and bottom blanking section 2 inwalls accounts for 0.1%, 0.3%, 1.0%, 1.6%, 3.3%, 6.6%, 10%, 15% of bottom blanking section radius (internal diameter).Measuring flow returns to 95% energy consumption of normal discharge.Energy consumption take 0.3% is 1, calculates the energy consumption of other ratio, sees Table 1.

0.1％

0.3％

1.0％

1.6％

3.3％

6.6％

10％

15％

Energy consumption

100％

95％

85％

70％

95％

110％

Wherein 0.1% space pressure sensor when testing is for the third time reported to the police, on inspection the loosening phenomenon of leaf development; 15% can't return to 95% of normal discharge.

The space of employing 3.3% blade warning and bottom blanking section do not occur and rotates unusually apart from contact running 1000 hours.

Embodiment 2:

Take fine coal as example, when flow drop to normal discharge 70% the time start S. A. 3 and (start simultaneously the nozzle of blade, nozzle Jet with downward flow direction gas on the blade, 75 ° of nozzle and horizontal sextant angles, the space of blade and bottom blanking section 2 inwalls account for bottom blanking section radius (internal diameter) 3.3%), measuring flow returns to 95% energy consumption of normal discharge.

Take the energy consumption of embodiment 1 as 1, calculate the energy consumption of embodiment 2, see Table 2.

	Embodiment 1	Embodiment 2
			Energy consumption	100％	95％

As can be seen from the table, the nozzle that starts on the blade in blade rotation can reduce anti-blocking energy consumption.

Embodiment 3:

Take fine coal as example, when flow drop to normal discharge 70% the time start S. A. 3 and (start simultaneously the nozzle of blade, the space of blade and bottom blanking section 2 inwalls account for bottom blanking section radius (internal diameter) 3.3%), wherein, nozzle Jet with downward flow direction gas on the blade, nozzle and horizontal sextant angle 15,35,55,75,95 °.Measuring flow returns to 95% energy consumption of normal discharge.Take the energy consumption of 15 ° of angles as 1, calculate the energy consumption of other angle, see Table 3.

	15°	35°	55°	75°	95°
						Energy consumption	100％	95％	80％	75％	100％

As can be seen from the table, 75 ° have lowest energy consumption.

Embodiment 4:

Take fine coal as example, when flow drop to normal discharge 40%, 50%, 60%, 70%, 80% the time start S. A. 3 and (start simultaneously the nozzle of blade, the space of blade and bottom blanking section 2 inwalls account for bottom blanking section radius (internal diameter) 3.3%), wherein, nozzle Jet with downward flow direction gas on the blade, 75 ° of nozzle and horizontal sextant angles, flow return to normal discharge 95% the time close S. A. 3 (closing simultaneously the nozzle of blade), calculate the energy consumption of carrying the anti-blocking equipment of 10kg material.Energy consumption take 40% is 1, calculates other energy consumption, sees Table 4.

40％

50％

60％

70％

80％

Energy consumption

100％

95％

90％

100％

As can be seen from the table, start 70% the time and have lowest energy consumption.

Embodiment 5:

Similar to Example 4, just change fine coal into flying dust, the results are shown in Table 5.

	40％	50％	60％	70％	80％
						Energy consumption	100％	85％	95％	100％	105％

As can be seen from the table, start 50% the time and have lowest energy consumption.

Claims

1. solid material carrying method, use the solid material load transfer device, described equipment comprises at least one broach hopper, this broach hopper comprises top material loading section and bottom blanking section, has blade in the bottom blanking section, and blade and bottom blanking section inwall have a fixed gap, blade is connected with S. A., by S. A. rotation, blade has the nozzle of subordinate's section of expecting inwall jet gas down, has flow measurement at the outlet section of bottom blanking section;

2. the method for claim 1 is connected with pressure sensor at least one blade, preferably is connected with pressure sensor at each blade.

3. such as each described method of claim 1-2, the space of blade and bottom blanking section inwall accounts for the 0.3%-10% of bottom blanking section inwall radius, preferred 1.0%-6.6%, more preferably 1.6%-3.3%.

4. such as each described method of claim 1-3, its Leaf is identical everywhere with the space of bottom blanking section inwall.

5. such as each described method of claim 1-3, the space of its Leaf and bottom blanking section inwall reduces from top to bottom gradually.

6. such as each described method of claim 1-5, wherein blade plan form can be in the shape of a spiral, straight tabular or swash plate shape.

7. such as each described method of claim 1-6, the nozzle Jet with downward flow direction gas on its Leaf.

8. method as claimed in claim 7, the nozzle on the blade and horizontal sextant angle are 15-95 °, preferred 45-90 °, more preferably 55-75 °, most preferably 75 °.

9. such as each described method of claim 1-8, it is the 80%-40% that drops to normal discharge that described flow drops to a certain amount of.

10. method as claimed in claim 9, when for delivery of fine coal, flow drops to 70% of normal discharge; When for delivery of flying dust, flow drops to 50% of normal discharge.