CN204786470U - Spiral dross removal mechanism of power plant boiler - Google Patents

Abstract

The utility model discloses a spiral dross removal mechanism of power plant boiler for the problem of difficulty is leaked out, is installed in the solution, partial sediment well, sediment well self -supporting steel column, spiral dragveyer and the ash crusher of including of device, spiral dragveyer is located the sediment well under, the slag notch position at spiral dragveyer is installed to the ash crusher, a serial communication port, the sediment well is installed between furnace hopper and spiral dragveyer, the sediment well passes through sediment well self -supporting steel column to be installed on the ground use annular water seal to carry out sealing connection between furnace hopper and the sediment well use the water seal to be connected between sediment well and the spiral dragveyer basin. Solved and received to accumulate after the hot side installation error of furnace hopper and to the influence of dross removal mechanism installation, have sealed effectual advantage.

Description

The spiral deslagging device of station boiler

Technical field

This utility model relates to the project installation technical fields such as spiral deslagging device, specifically a kind of spiral deslagging device.

Background technology

Modern large thermal power plant slag-eliminating device is the vitals of boiler, and running the safety of boiler and long-term economic has very large impact.The furnace bottom that deslagging device installation quality has influence on boiler leaks out, and air leakage coefficient often increases by 0.1 ~ 0.2 will make station boiler net efficiency reduce by 0.2% ~ 0.5%, will cause direct economic loss 43 ~ 1,100,000 yuan every year for 300MW unit; Air leakage coefficient often increases by 0.1 simultaneously, and air-introduced machine power consumption will increase 43kWh, and pressure fan power consumption also can significantly increase thereupon.

In current China wet slag removal device, dragveyer generally adopts submerged slag conveyor and screw cinder cleaner two kinds of types.Because spiral slag dragging machine advantage is that integral layout is compact flexibly, good seal performance, system are simple, reliable, failure rate is low, be therefore used in 300MW and above machine set system more.

Spiral deslagging device is senior as one, continuous print slag-eliminating device, because it adopts immersion baffle plate as sealing device, and parts are scattered, equipment interface is many, so installation method from bottom to top traditionally, easily there is the deviation of equipment interface position, accumulated error is installed and concentrates on top, furnace bottom is easily caused to leak out because heating surface expands during unit operation, furnace slag granulating effect is low, slag is leaked in device damage and appearance, leak water problem, not only increase energy resource consumption, strengthen disposal of pollutants, also reduce deslagging efficiency simultaneously, the steady in a long-term operation of the safety of unit is impacted.

Utility model content

In order to solve the deficiencies in the prior art, the utility model provides station boiler spiral deslagging device, for improving the operational efficiency in boiler running process, and solves the problem of the installation difficulty that furnace bottom narrow space causes further.

The utility model solves the technical scheme that its technical problem adopts:

The spiral deslagging device of station boiler, comprise slag well, slag well self-supporting steel column, spiral slag dragging machine and slag crusher, described spiral slag dragging machine is positioned at immediately below slag well, described slag crusher is arranged on the slag notch position of spiral slag dragging machine, it is characterized in that, described slag well is arranged between furnace hopper and spiral slag dragging machine, described slag well is arranged on ground by slag well self-supporting steel column, between described furnace hopper and slag well, use annular water seal to be connected and sealed, use water seal to be connected at described slag well with between spiral slag dragging machine tank.

Further, one is being had around the annular seal-water tank of outside a week near the arranged outside at top, the insulation construction that the borehole wall of described slag well is made up of inner casing, shell and the insulation material that is clipped in the middle, it is the mounting points coordinated with slag well brace steel post in the side of described slag well, the edge, bottom of described slag well is provided with connecting plate, one first water seal plate is arranged on the downside of connecting plate by Flange joint and is inserted in spiral slag dragging machine tank, and water seal depth wherein controls be not less than 300 millimeters.

Further, the top of described slag well inner space is square tube shape, and bottom is square cone tubular, and on slag well shell, arrange the reinforcement of vertical and horizontal.

Further, be provided with an annular second water seal plate in the edge, downside of furnace hopper, the second water seal plate is wherein inserted in the annular seal-water tank at slag well top, and water seal depth wherein controls be not less than 300 millimeters.

The beneficial effects of the utility model are:

Add a slag well in this device, the flexibility in installation, maintenance process and convenience can be improved, and water seal design is carried out to all tie points, zero air leak rate of air curtain can be realized.Adopt inverted order " closed assembly ", install from top to bottom, by adjustment slag well self-supporting steel column and track level measuring, the impact that the error being accumulated to furnace hopper after solving heating surface installation is installed deslagging device.This installation method is easily grasped, easy to operate, and working security is higher.

Accompanying drawing explanation

Fig. 1 is installation procedure schematic diagram.

Fig. 2 is the spiral deslagging device schematic diagram of station boiler.

Fig. 3 is one of guide rails assembling schematic diagram.

Fig. 4 is guide rails assembling schematic diagram two.

Fig. 5 is the position view between slag well and water sealed tank.

Fig. 6 is the schematic diagram of overflow mechanism.

Fig. 7 is the sectional view of slag well.

In figure: 1 spiral slag dragging machine, 11 tracks, 111 embedded parts, 112 once grouting, 113 back-groutings, 12 frameworks, 13 rail wheels, 14 fixed structures, 15 spiral slag remover water sealed tanks, 151 overfalls, 152 overflow launders, 153 overflow plates, 154 overflow waters collect mouth, 2 slag wells, 21 slag well self-supporting steel columns, 22 annular seal-water tanks, 23 insulation materials, 24 mounting points, 25 connecting plates, 26 flanges, 27 first water seal plates, 3 furnace hoppers, 31 second water seal plates.

Detailed description of the invention

For existing defect, the applicant draws dragveyer installation experience, for the characteristic of spiral deslagging device, sums up and defines a set of easy, installation method fast and effectively, leak out for solving, the common quality problem such as expansion, and improve efficiency of construction.

What develop is a kind of for screw cinder cleaner device, and wherein spiral deslagging device comprises the equipment such as spiral slag dragging machine, slag crusher, slag well and slag well self-supporting steel column.

As shown in Figures 1 to 7, its basic principle is, according to the design feature of spiral slag dragging machine 1, spiral deslagging device first installs spiral slag dragging machine track 11 before installing, put in advance to relevant position by screw cinder cleaner 1, slag well 2 and supporting construction adopt " closed assembly " technique to carry out inverted order assembling.Namely at furnace bottom slag well 2 combined and be hung on furnace hopper 3 temporarily, keep certain terrain clearance, again slag well 2 is fallen after the installation of slag well self-supporting steel column 21 is fixing, gap (the being generally 300mm) installation in position afterwards between good slag well 2 to be adjusted and furnace hopper 3.After slag well 2 installation, spiral slag dragging machine body is installed again.After all devices such as spiral slag dragging machine 1 grade is in place, check rotating machinery is gone forward side by side the connection work in line pipe road.It is the absolute altitude and the sealing of levelness, slag well and spiral slag dragging machine, the boiler expansion spacing (200 millimeter) reserved between slag well and furnace hopper that ensure spiral slag dragging machine track and slag well that spiral deslagging device installs key, by measuring and adjust the above indices of strict control in construction.

Wherein, slag well 2 is a square funnel-form, is jagged edge at the top of slag well 2, and is being provided with one near the outer edge at top around the annular seal-water tank 22 of outside a week.Slag well 2 inside is divided into top to be square tube shape, and bottom is square cone tubular.Wherein, the borehole wall of slag well 2 is composite construction, is made up of, for improving heat insulation effect inner casing, shell and the insulation material 23 that is clipped in the middle.It is the mounting points 24 coordinated with slag well brace steel post 21 in the side of slag well 2.For improving bulk strength, slag well shell arranges the reinforcement of vertical and horizontal, outward appearance forms the reinforcement structure of groined type.

The edge, bottom of slag well 2 is provided with connecting plate 25, and material is steel plate, and pattern is consistent with the bottom of slag well, and for square, connect a first water seal plate 27 by a flange 26, material is steel plate, carries out removable connection with connecting plate 25.

Furnace hopper 3 is parts of boiler, be positioned at the downside of boiler, for square cone tubular, be provided with annular, a vertical second water seal plate 31 arranged in the edge, downside of furnace hopper 3, the second water seal plate wherein just in time can be inserted in the annular seal-water tank 22 at slag well top, forms a water seal, water seal depth wherein controls in the scope being not less than 300 millimeters, to ensure the safety run, and automatic makeup water pipe is set, makes water level wherein remain on safe height.

Spiral slag dragging machine 1 is positioned at immediately below boiler furnace hopper 3, and slag crusher 4 is arranged on the slag notch position of spiral slag dragging machine 1, form one, supported by a framework 12, and rail wheel 13 is set in the bottom of framework 12, for coordinating with track 11, and being provided with fixed structure 14 between framework 12 and ground, the fixing of dragveyer after putting in place, can be realized.Spiral slag dragging machine is prior art, has a water sealed tank wherein, and wherein fill full aqueous water, the first water seal plate 27 in slag well 2 is inserted into water sealed tank inside, forms one water seal.Wherein the water seal depth at this place is not less than 300 millimeters, ensures safety.

Open a circular hole in the side of spiral slag remover water sealed tank 15, draw an overfall 151 by pipeline, and at overfall arranged outside overflow mechanism.Wherein, this overflow mechanism comprises overflow launder 152, overflow plate 153 and overflow water and collects mouth 154, and the setting height(from bottom) of overflow plate 153 wherein determines the liquid level of water sealed tank through with it.

Between described furnace hopper 3 and slag well 2, use annular water seal to be connected and sealed, use water seal to be connected at described slag well with between spiral slag dragging machine tank.Based on above-mentioned description, specific implementation process of the present utility model is as follows:

Step one: device enumerates, inspection, numbering, transport

Equipment is verified a statement after unpacking, and whether conscientious checkout facility quantity is complete, and whether size, specification, material and equipment appearance etc. meet designing requirement.Part of appliance is numbered and performs record, for subsequent use.Wherein, spiral slag dragging machine 1 uses 25 tons of flat cars to be transported to infield, other equipment use less than 10 tons transport vehicles.

Step 2: basis checks, line

1) burner hearth center line is checked, with burner hearth center line for origin reference location spiral slag dragging machine 1 mounting center line.

2) with datum mark check spiral slag dragging machine track 11, slag well self-supporting steel-column foundation cross centre line in length and breadth that civil engineering provides, if deviation is excessive, the position of adjustment center line that should be suitable, then marks installation reference line on basis; Check each foundation elevation, and on basis, arrange absolute altitude datum mark, set-up mode is setting-out.

Step 3: slag well group closes

This slag well 2 is four, the two W type self-support type slag well of composition, and size is comparatively large, is therefore divided into two large part combinations when combining and installing.

1) slag well discrete piece is transported to below furnace hopper, makes falsework with channel-section steel, side plate is propped rear group and fixes, spot welding.

2) aboveground, the bottom size of the complete rear measurement slag of entire combination, carries out seal welding after meeting the requirements, and welding adopts skip welding, intermittent weld method reduces welding deformation, carries out detection experiment after welding.

3) in place for ease of spiral slag dragging machine 1, slag down-hole portion sealing plug-in board connects with bolt after spiral slag dragging machine is in place again.

Step 4: slag well lifts

Lightweight packages is taken into full account, reasonable selection steel wire rope, chain block and sling point during lifting.According to slag well Hoisting Program, below furnace hopper 3 after combination, be hung on furnace hopper, hanging height is about 300mm higher than plane on slag well self-supporting steel column temporarily, reserve sufficient space to the installation of slag well self-supporting steel column.

In above-mentioned hanging process, one more conveniently scheme is: slag well is directly hung on boiler bottom furnace hopper, distortion is caused because local pressure is excessive for reducing furnace hopper, the contact area of suspension centre and furnace hopper should be increased, therefore, the I-steel of the interspersed appropriate length in furnace hopper inside before Boiler Furnace, after stove, slag well weight uniformity is distributed on furnace hopper, wherein I-steel is inner at furnace hopper with the load at that time of two ends cross-arm, forms an interim crossbeam, installs rear dismountable.

Step 5: the installation of slag well self-supporting steel column 21

1 slag well 2 is hung well, carries out the installation of slag well self-supporting steel column 21.Slag well self-supporting steel column is in place according to the cross centre line be labeled on basis, spacing, perpendicularity and absolute altitude between rear measurement slag well self-supporting steel column in place, regulated by parallels if absolute altitude is inconsistent, after every data fit requires, carry out welding of slag well self-supporting steel column and embedded part, realize fixing.

The mounting process of 2 slag well self-supporting steel columns 21

1) measure the actual elevation of furnace hopper, according to the swell increment of furnace hopper actual elevation, furnace hopper and the size of drawing requirement, whether the absolute altitude calculating the slag well self-supporting steel column strong point meets the demands.

2) measure slag well self-supporting steel column longitudinally, laterally between spacing, whether meet drawing and on-the-spot requirement.

3) measure slag well self-supporting verticality of steel column, meet drawing requirement.

Note: during slag well self-supporting steel column is installed, if control the absolute altitude of the bad slag well self-supporting steel column strong point, the expansion clearance occurring because of furnace hopper and slag well after being easy to cause slag well to install in unit operation causes the phenomenon of device damage not.Carry out according to this technique the appearance can avoiding above situation is installed, ensure that progress and the quality of installation.

Step 6, slag platform shaft staircase are installed

For convenience of the installation in place of slag well, slag well carries out platform, ladder and railing and installs before installing, affect the delayed dress that slag well is in place, measured location dimension during mounting platform, then weld with bracket.Mounted platform staircase will ensure that platform is solid and reliable, and railing post will ensure vertically, spacing is wanted evenly, and cross bar is straight.Forbid with gas flame cuttiug railing pipe.

Step 7, slag well are in place

After satisfying the requirements, slag well 2 is placed on slag well self-supporting steel column 21.Now to ensure that slag well export center is consistent with spiral slag dragging machine 1 cinder notch center, measure the space D 2 between the second water seal plate of space D 1 between the first water seal plate and the water sealed tank water surface and furnace hopper lower end and annular seal-water tank, realize the water seal at two places, after meeting the requirements, slag well is welded with slag well self-supporting steel column.

Step 8: the track installing spiral slag dragging machine

First slag shaft bottom end actual elevation, the height of spiral slag dragging machine body, orbit altitude in conjunction with drawing is measured, calculate track embedded part actual elevation, carry out once grouting 112 after the embedded part 111 of track 11 is good according to Pass line adjustment with the nut on foundation bolt, reach attachment rail 11 (see Fig. 3) after intensity.Track 11 must measure the actual pitch of spiral slag dragging machine rail wheel 13 before installing, install according to actual measurement spacing, spacing after track installation between the absolute altitude of focus measurement track 11, levelness and track, ensure consistent with the spacing that spiral slag dragging machine rail is taken turns, in order to avoid cause spiral slag dragging machine not slide smoothly.By drawing track 11 is welded with embedded part 111 after pending data is qualified, and carry out back-grouting 113 (see Fig. 4).

Step 9, spiral slag dragging machine 1 scene is placed

1) layout of spiral slag dragging machine haul slideway

Before spiral slag dragging machine equipment is transported to job site, form slideway along spiral slag dragging machine track 11 stove rear to parallel laid two channel-section steels, add hound reinforcing between two channel-section steels to ensure to haul the stability of slideway.Haul slideway docks (dock intensity for strengthening, channel-section steel welds with outside orbital docking place) with the formal track of spiral slag dragging machine is straight.

2) spiral slag dragging machine haul

Spiral slag dragging machine 1 equipment is transported to job site before front flue steel bracket is installed, be located on haul slideway, due to bottom spiral slag dragging machine 1 be movable pulley support, can move along track 11 direction, utilize 5 tons of chain blocks (such as, chain block is fixed on the column on front side of boiler) that spiral slag dragging machine is directly dragged to installation site along haul slideway after stove.

This method reduce transport and the hoisted in position difficulty (lift limited space in workshop, crane is difficult to enter) of spiral slag dragging machine, effective saving manpower and mechanical one-shift, arrive the object of cost efficiency.

Step 10, spiral slag dragging machine are installed

Spiral slag dragging machine 1 is pushed into below slag well 2 by 1, installs the overflow mechanism of spiral slag dragging machine, the first water seal plate 27 of slag well junction.

1) the first water seal plate 27 place is Flange joint, asbestos cord of should jumping a queue during installation, the tightness that reinforcing flange connects.

2) insertion depth (being generally 200 millimeter) of overflow mechanism setting height(from bottom) and slag well sealing plug-in board, affect the sealing property of slag well and spiral slag dragging machine, slag crusher, spiral slag dragging machine, slag crusher inspection manhole door should be opened herein, detailed height measuring and calculating is carried out to sealing plug-in board, determines the setting height(from bottom) of overflow mechanism.

Step 11, spiral slag dragging machine rotating machinery check, cleaning

1) spiral slag dragging machine motor and reductor, slag crusher motor and reductor are liquid coupling axial organ type of attachment, should check liquid even oil level during installation.Spiral slag dragging machine reductor and spiral slag dragging machine rotating shaft are gimbal coupling, need to its grease up, and the dynamic reductor of dish checks that whether the rotation of gimbal coupling is smooth.

2) foreign matter between cleaning spiral formula dragveyer flight and spiral slag dragging machine body inside groove, whether the dynamic reductor of dish, check that whether flight rotation is smooth, occur to rub or collide with spiral slag dragging machine body inside groove.

3), after spiral slag dragging machine equipment inspection, spiral slag dragging machine cell body is cleared up again and closes manhole door.

4) after equipment is installed and terminated, adopt douche to carry out the overall leakage detection of slag removing system, prevent and leak, leak grey phenomenon.

Step 12, subsidiary pipeline are installed

1) slag removing system that this spiral slag dragging machine and slag well group close is slag tap, need the impact of liquid by nozzle of large strength, wash away the object reaching deslagging, therefore must purge before pipeline construction, ensure that its internal sweep is totally led to ball afterwards and seals, avoid because foreign body obstruction nozzle causes deslagging not smooth.

2) first every sheet flange four bolts are connected with valve during Flange joint, then start tube welding work.Subsidiary pipeline is installed and is wanted neat appearance, valve convenient operation, does not hinder overhaul of the equipments and normal pass.

Spiral deslagging device leak out a little main at water sealed tank place, slag well and dragveyer adpting flange place, slag Jing Mifengchabanchu.In installation process, adopt inverted order " closed assembly " technique, ensure construction quality by the mode measured and adjust, solve leaking out a little of spiral deslagging device.

Adopt the method to carry out the installation of dragveyer, safety and steady, superior in quality, sealing is good, and air leak rate of air curtain is zero substantially, and equipment cold conditions is debugged and in hot running, expansion clearance fully, meets the requirements, stable and reliable operation.

Embodiment recited above is only be described preferred embodiment of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; relevant technical staff in the field, to various distortion of the present utility model and improvement, all should expand in protection domain as determined in the utility model claims.

Claims (4)

1. the spiral deslagging device of station boiler, comprise slag well, slag well self-supporting steel column, spiral slag dragging machine and slag crusher, described spiral slag dragging machine is positioned at immediately below slag well, described slag crusher is arranged on the slag notch position of spiral slag dragging machine, it is characterized in that, described slag well is arranged between furnace hopper and spiral slag dragging machine, described slag well is arranged on ground by slag well self-supporting steel column, between described furnace hopper and slag well, use annular water seal to be connected and sealed, use water seal to be connected at described slag well with between spiral slag dragging machine tank.

2. the spiral deslagging device of station boiler according to claim 1, it is characterized in that, one is being had around the annular seal-water tank of outside a week near the arranged outside at slag well top, the borehole wall of described slag well is by inner casing, the insulation construction that shell and the insulation material be clipped in the middle form, it is the mounting points coordinated with slag well brace steel post in the side of described slag well, the edge, bottom of described slag well is provided with connecting plate, first water seal plate is arranged on the downside of connecting plate by Flange joint and is inserted in spiral slag dragging machine tank, water seal depth is wherein not less than 300 millimeters.

3. the spiral deslagging device of station boiler according to claim 2, is characterized in that, the top of described slag well inner space is square tube shape, and bottom is square cone tubular, and on slag well shell, arrange the reinforcement of vertical and horizontal.

4. the spiral deslagging device of station boiler according to claim 2, it is characterized in that, an annular second water seal plate is provided with in the edge, downside of furnace hopper, the second water seal plate is wherein inserted in the annular seal-water tank at slag well top, and water seal depth is wherein not less than 300 millimeters.