CN208727724U - Setting checks sieve on as-fired coal belt feeder - Google Patents

Abstract

The utility model discloses settings on a kind of as-fired coal belt feeder to check sieve.Recirculating fluidized bed power plant is crushed the setting of building as-fired coal belt layer and checks sieve.It by setting below fine crusher feed opening check sieve, as-fired coal belt feeder, belt mechanism at.The utility model by increasing in as-fired coal belt layer checks that riddler's skill and technological transformation solve the problems, such as the off grade size in cycle fluidized bed as-fired coal containing 3-30% in the case where realizing because being crushed building space and structure arrangement limitation.

Description

Setting checks sieve on as-fired coal belt feeder

Technical field

The utility model relates to a kind of screenings of thickness material, are related specifically to thermal power plant gangue coal handling system and enter Furnace coal size controlling field.

Background technique

Thermal power plant coal gangue power generation circulating fluidized bed boiler is the gangue of burning 0-10mm certain proportion partial size Grain.And the as-fired coal partial size in coal handling system after sieving approach cannot reach the grain size curve of boiler design burning at present.Enter It is greater than the off grade size accounting 3-30% of 10mm on furnace coal belt feeder.Mainly with partial size coal cinder bigger than normal and without heat in these partial sizes Based on the ore of value, it is in addition accompanied by ironware.If can sort out these unqualified coal cinder ores, this will be for boiler Major-minor system equipment energy-saving and emission-reduction of burning play an important role.

Well-known, coal-powder boiler plays calorific value, and fluidized-bed combustion boiler plays partial size.Boiler cans be compared to the stomach on human body, and burns in boiler Coal particle can be compared to rice, the ore of the coal gangue particle big more than rice and no calorific value seemingly has not a particle of for stomach than bone Benefit.These large coal particles spoils and ore, which enter boiler combustion, will absorb the heat reduction boiler thermal efficiency of boiler, aggravation Abrasion, increase blower motor power, raising deslagging difficulty, increase slag removing system equipment failure rate of boiler water wall etc..

Summary of the invention

The mesh of the utility model it is to solve the deficiencies in the prior art, provides and be arranged on a kind of novel as-fired coal belt feeder Check sieve.It, which relates generally to equipment, has fine crusher feed opening, checks sieve, flap valve, as-fired coal belt feeder, belt feeder, waste port.

The utility model is achieved through the following technical solutions: coal is sieved at material mouth to inspection and sets turnover panel under fine crusher Two tunnels of Vavle switching point.It when flap valve, which is opened, checks sieve side blanking, checks that sieve enters working condition, checks that sieve will be less than 0- Under the qualified material partial size sieve of 30mm, qualified partial size directly falls to as-fired coal belt, is sent into boiler combustion by as-fired coal belt It burns；The coarse partial size of not qualified oversize is delivered to oversize belt feeder through compass screen surface, and material is discharged by waste port, completes entire As-fired coal sieving technology.

As a preference, the flap valve has two kinds of settings, one is settings in fine crusher material blanking tube, another It is set to above inspection sieve compass screen surface.

As a preference, setting checks that sieve is all provided with interlocked control on the as-fired coal belt feeder, in material, whether there is or not sieves The different switching of divided working status progress control function.Automatically controlled interlock system be connected with central control room, it can be achieved that remotely with rise on the spot Stop.

As a preference, the as-fired coal belt layer, which increases setting on as-fired coal belt feeder, checks sieve, it is defeated coal measures Other spaces are limited in system, can only be arranged in the technological transformation technique of as-fired coal belt layer and design.

As a preference, the material refers to thermal power plant's coal.

As a preference, the inspection sieve installation site center line is located above as-fired coal belt feeder center line, and Check that sieve all qualified materials of screenings are fallen on as-fired coal belt feeder.

As a preference, the belt feeder, which is located at, checks sieve lower section, belt feeder position can be divided into two kinds: the first with The center of as-fired coal belt feeder is overlapped and on extended line.Second is two sides of left and right below as-fired coal belt feeder.

Belt feeder arrangement one: positional relationship is to check sieve, belt feeder, as-fired coal belt feeder in same center line On, upper and lower relation is to check sieve above, and belt feeder is in centre, and as-fired coal belt feeder is in lower section.

Belt feeder arrangement two: positional relationship is inspection sieve, as-fired coal belt feeder on same center line, belt feeder In as-fired coal belt feeder center line or so two sides, upper and lower relation is to check sieve above as-fired coal belt feeder and belt feeder.

As a preference, described flap valve or so switching opening and closing checks sieve channel and another wing passage.System is normal Flap valve closes another wing passage in the case of putting into operation, and material enters inspection sieve from inspection minus mesh channel.When dimension is repaired in inspection screening Turnover panel Vavle switching, which is closed, when shield checks minus mesh channel material from another wing passage blanking to as-fired coal belt feeder.To not influence Normally upper coal puts into operation system.

As a preference, setting checks that sieve is to be crushed building in built electric power plant coal transportation to enter furnace on the as-fired coal belt feeder Coal belt feeder layer technological transformation newly adds setting on as-fired coal belt feeder and checks sieve.

As a preference, setting checks that sieve is ciculation fluidized suitable for coal gangue power generation factory on the as-fired coal belt feeder Bed coal delivery of boiler system support.

As a preference, the inspection sieve screening machine includes vibrating screen, roller picker, impeller sieve, intersects sieve, screening cloth Glassware, step sieve, discaling roll sieve.

As a preference, connect on the described inspection sieve fine crusher include toothed roll crusher, it is reversible disintegrating machine, anti-blocking Formula crusher, screening crusher, ring hammer crusher.

As a preference, the inspection screen(ing) machine shell lower end and as-fired coal belt conveyor for preventing dust hood are tightly connected.

As a preference, described two kinds of apertures of check screening, one is bar shapeds to stitch aperture, and another kind is circular hole and side Hole, Sieving and casing are 0-30mm range.

As a preference, the turnover panel valve position has two kinds of settings checking above sieve compass screen surface in a kind of setting, separately It is a kind of that fine crusher is set, in the coal spout in dusting cover machine feed opening.

It is sifted out below material mouth as a preference, the belt machine inlet side is located at inspection, other side discharge port Outside broken building wall.

As a preference, the inspection sieve compass screen surface angle and as-fired coal belt are 0-85 degree.

As a preference, the flap valve is it acts as switching, whether there is or not sieving technologies.

As a preference, the flap valve can be divided into electronic, pneumatic, manual, hydraulic four seed types；Manually may be used It is substituted by easy stock guide.

The utility model solves as-fired coal partial size excessive problem.

Detailed description of the invention

Fig. 1 is that setting checks sieve belt feeder center line arrangement 1 on the utility model as-fired coal belt feeder.

Fig. 2 is that setting checks sieve belt feeder or so two side arrangements 2 on the utility model as-fired coal belt feeder.

In figure, 1- fine crusher, 2- fine crusher feed opening, 3- as-fired coal belt feeder, 4- flap valve, 5-, which is checked, to be sieved, 6- skin Band machine, 7- waste port.

Specific embodiment

The utility model is further described with reference to the accompanying drawings and examples:

As shown in Figure 1, setting checks sieve on as-fired coal belt feeder, it includes 1 fine crusher feed opening 2 of fine crusher, as-fired coal Belt feeder 3, flap valve 4 check sieve 5, belt feeder 6, waste port 7.

The working principle process of the example of the utility model is as follows:

It checks that sieve 5 connects fine crusher feed opening 2, the underproof as-fired coal partial size of the 3-30% to escape after crusher machine fine crushing is led to Cross the control that sieving technology realizes as-fired coal partial size.Material is entered by flap valve 4 after fine crusher is fine crushing checks sieve 5, checks sieve 5 To the greatest extent by partial size sieve qualified within the scope of 0-10mm, qualified partial size screenings drops to as-fired coal belt feeder 3 and enters boiler combustion, not qualified The coarse partial size of oversize drop to belt feeder 6, the bulky material of 3-30% not qualified after screening is delivered to waste port 7 by belt feeder 6 Discharge.

As shown in Fig. 2, belt feeder 6 is another material blanking tube connecting with as-fired coal belt feeder 3 of evacuation, thus two cloth of scheme It sets in 3 center line of as-fired coal belt feeder or so two sides.

Above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application, although referring to preferred embodiment pair The utility model is described in detail, those skilled in the art should understand that, it can be to the technical side of the utility model Case is modified or replaced equivalently, and without departing from the objective and range of technical solutions of the utility model, should all be covered and sent out In bright Claims scope.

Claims (1)

1. setting checks sieve on as-fired coal belt feeder, it is characterised in that: be located at as-fired coal belt layer, including fine crusher feed opening (2), as-fired coal belt feeder (3), inspection sieve (5), belt feeder (6), flap valve (4), waste port (7), inspection sieve (5) packet It includes vibrating screen, roller picker, impeller sieve, intersect sieve, screening distributor, step sieve or discaling roll sieve, check sieve (5) screenings qualification grain Diameter is within the scope of 0-30mm；

Check that sieve (5) is located above as-fired coal belt feeder (3) center line, two kinds of arrangements of belt feeder (6) point；

Belt feeder arrangement one: positional relationship is to check sieve (5), belt feeder (6), as-fired coal belt feeder (3) in same On center line, upper and lower relation is to check sieve (5) above, and belt feeder (6) is in centre, and as-fired coal belt feeder (3) is in lower section；

Belt feeder arrangement two: positional relationship is to check to sieve (5), as-fired coal belt feeder (3) on same center line, belt For machine (6) in as-fired coal belt feeder (3) center line or so two sides, upper and lower relation is to check sieve (5) in as-fired coal belt feeder (3) and skin Above band machine (6)；

It checks and is set flap valve (4) at sieve (5) feeding inlet, the switching opening and closing of described flap valve (4) left and right checks sieve channel and another Wing passage.