CN111594841A - Reverse-pushing mechanical grate garbage incinerator installation construction method - Google Patents

Abstract

The invention discloses a reverse-push mechanical grate garbage incinerator installation and construction method, which comprises the following steps: 1) the installation of stand, horizontal beam, 2) the installation of feeder steel structural support, 3) the installation of feeder, 4) the grate installation, 5) the installation of grate actuating system, 6) the installation of grate piece, 7) the installation of shaking the piece of slagging tap, 8) the pneumatic cylinder installation, 9) the installation of stove outer covering, 10) feeder hopper and chute composite set, 11) the installation of primary air chamber ash bucket and infiltration liquid fill, 12) the installation of slagging-off machine, 13) hydraulic system installation and washing, 14) the debugging. The invention optimizes the construction procedure and the construction process, improves the construction quality, shortens the construction period and ensures the smooth operation of the whole set of the unit.

Description

Reverse-pushing mechanical grate garbage incinerator installation construction method

The technical field is as follows:

the invention relates to an installation program and specific steps of a garbage incinerator, in particular to an installation and construction method of a reverse-push mechanical grate garbage incinerator.

Background art:

at present, domestic garbage treatment forms in China mainly include sanitary landfill and incineration power generation forms; compared with the modes of landfill and the like, the garbage incineration not only can greatly reduce the volume and avoid secondary pollution to underground water and soil, but also can change waste into valuables to use household garbage to generate electricity, thereby obtaining great economic benefit; the garbage incinerator is the core equipment of a garbage incineration power plant, and the field installation quality of the garbage incinerator directly influences the operation capacity and the service life of the incinerator.

The invention content is as follows:

the technical problem to be solved by the invention is as follows: the reverse-pushing mechanical grate garbage incinerator installation construction method is provided, and the construction procedures and the construction process are optimized by using the method; the construction quality is improved, the construction period is shortened, and the smooth operation of the whole set of the unit is ensured.

The technical scheme adopted by the invention for solving the technical problem is as follows:

a reverse-push mechanical grate garbage incinerator installation and construction method is characterized in that: the method comprises the following steps:

A. construction preparation:

1) counting the accessories, placing the accessories in order and making a moisture-proof measure;

2) the method comprises the following steps of marking out a foundation, determining longitudinal and transverse datum lines of an incinerator, determining longitudinal and transverse center lines of a steel frame column base according to a marked longitudinal axis, measuring distances between adjacent axes point by point, and carrying out overall diagonal measurement;

3) marking the steel frame, marking the upright column according to the drawing size, marking a 1m height mark line from the top of the upright column downwards, and marking; marking a central line on the upright column so as to be convenient for vertical alignment measurement;

B. the method comprises the following specific steps:

1) the installation of the upright post and the horizontal beam:

a. the longitudinal and transverse reference lines of the incinerator are determined by taking the central line of the waste heat boiler as the reference, and after the longitudinal and transverse reference lines and the basic elevation of the incinerator are determined, a lower upright post and a horizontal cross beam can be installed;

b. finding out the cross line of each upright column on the basis, similarly finding out the center line of the cross on the steel column, wherein the plumb tolerance of the upright columns is 3 mm; after the upright posts are installed and adjusted, the upright posts are welded firmly, and after the upright posts are installed, surfacing is carried out; the height of the upper top surface of the upright post is adjusted according to the actual elevation sizing block, and the height difference of the upper top surfaces of the upright posts is 2 mm; the vertical and horizontal center lines of the upper plane of the horizontal beam must be superposed with the vertical and horizontal center lines of the foundation, and the allowance of the upper plane of the horizontal beam is 2 mm;

c. after the horizontal cross beam is installed, measuring and marking out longitudinal and transverse installation datum lines of the grate and feeder steel structure support by using a level gauge, and marking out installation positioning datum lines of the other four horizontal longitudinal beams and the inclined longitudinal beams to two sides respectively by taking a longitudinal central line as a standard; after the installation and acceptance of the upright columns and the horizontal cross beams are finished, foundation grouting is carried out;

2) the feeder steel structure supports and installs:

a. sheet beam installation:

firstly, a single furnace steel structure support comprises five groups of sheet beams, each sheet beam is subjected to positioning sample application blunderpunch when leaving a factory, each sheet beam consists of a rear longitudinal beam and a front steel structure, the rear longitudinal beam and the front horizontal beam are connected by bolts, a butt joint part is welded firmly after the straightness of the rear longitudinal beam and the front horizontal beam is confirmed to be qualified, and the height difference between a rear supporting point and a front supporting point is measured by a stay wire; finding out the height required by the rear supporting point by taking the top surface of the horizontal cross beam at the front part as a reference, and adjusting to the elevation of the drawing by using an adjusting base plate;

secondly, finding out longitudinal and transverse installation datum lines on the horizontal cross beam and the rear foundation embedded plate, and determining the installation position of the plate beam; before the sheet beam is installed, the height difference of the installation part of the sheet beam at the upper part of the horizontal cross beam is adjusted to the requirement of a drawing by using a gasket, and the height difference is ensured to be within 2 mm; during installation, the positioning point of each group of plate beams is required to be superposed with the scribed installation reference line on the horizontal cross beam;

sequentially hoisting and fixing the five groups of plate beams in place, firstly correcting the middle plate beam, welding temporary positioning blocks to fix the middle plate beam in the front-back and left-right directions, and then sequentially aligning the middle plate beam to two sides; after the sheet beam and the rear longitudinal beam are installed and fixed, checking whether the longitudinal and transverse installation positions of the sheet beam are qualified or not, and checking the verticality of the sheet beam by using a suspension wire, wherein the tolerance is less than or equal to 1 mm;

b. the feeder supports the connecting beam to be installed:

firstly, after the installation and acceptance of the plate beams are finished, the installation of grate driving hydraulic cylinder beams, front and rear inclined column reinforcing beams, plate beam front bracing, rear longitudinal beam bracing and other bottom connecting beams are carried out, all the connecting beams are sequentially installed towards two sides by taking a middle plate beam as a reference in the installation sequence, the space of each group of plate beams is ensured to be consistent with a drawing in the installation process, the space is adjusted by a gasket, and the tolerance is less than or equal to 2 mm;

secondly, when the upright columns and the front short inclined columns on the bottom plane of the plate girder are installed, the verticality of the upright columns and the angles of the short inclined columns are ensured, and bolts of all connecting surfaces are firmly connected and reliably fixed;

after the bottom connecting beam and the upright post are installed, the grate rocker arm and the percolate bucket are stored in place, the installation of a top plane connecting beam and an inclined strut is started, the flatness of a feeder supporting platform must be guaranteed when the top beam is installed and connected, and the tolerance is less than 5 mm; meanwhile, the requirements of the inside opening, the length and the diagonal size of each feeder supporting platform are met, the difference value of the diagonal lines in the allowance is less than or equal to 3mm, and the difference value of the large diagonal lines is less than or equal to 3 mm;

aligning the feeder supporting platform in sequence towards two sides by taking the middle sheet beam as a reference, adjusting the opening and the diagonal size by using an adjusting gasket, completely welding the feeder supporting steel structure after all the steel structure is installed and inspected, and preventing welding deformation by adopting symmetrical welding and paying attention to the welding speed during welding;

c. installing an oblique longitudinal beam:

firstly, taking the horizontal direction as a reference, setting the installation angle of the oblique longitudinal beams to be 24 degrees, and enabling the longitudinal central line of each oblique longitudinal beam to be superposed with the central line of the sheet beam, wherein the straightness tolerance of the oblique longitudinal beam is +/-3 mm;

when the oblique longitudinal beams are installed, the oblique longitudinal beams in the middle are installed, and the oblique longitudinal beams are installed in place and then sequentially installed towards the two sides; firstly, installing a sliding support base plate below an oblique longitudinal beam in place, and adjusting the sliding support base plate to the elevation size of a drawing by adjusting the base plate; the middle oblique longitudinal beam is a positioning beam, and after the middle oblique longitudinal beam is installed in place, a positioning block is installed on a lower support to ensure that the central line is not changed in the subsequent installation process; then, mounting left and right side oblique longitudinal beams, and reserving enough mounting allowance for bracing mounting of the oblique longitudinal beams in the mounting process;

thirdly, after the installation and adjustment of the inclined longitudinal beams are finished, the inclined longitudinal beam bracing can be installed, the installation sequence is sequentially installed from the middle to two sides, the supports below the left and right side inclined longitudinal beams are temporarily positioned after the alignment is finished, formal positioning blocks are installed after the grate frame is installed, the positioning blocks on two sides are gapless after the positioning block of the middle positioning inclined longitudinal beam is installed, the rest inclined longitudinal beams are movable beams, and a gap of 5mm is formed between the positioning block and the base;

fastening the bolts, opening the gear, and adjusting the diagonal lines and the angles by taking the middle positioning inclined longitudinal beams as the reference, wherein the inclined longitudinal beams are arranged in the same plane, the planeness of the adjacent inclined longitudinal beams is less than or equal to 3mm, the whole planeness is less than or equal to 5mm, the difference value of the large diagonal lines is less than or equal to 5mm, and the difference value of the small diagonal lines is less than or equal to 3 mm; after the acceptance is qualified, full welding is carried out on the flange at the joint;

d. welding a steel structure:

after the whole steel structure is assembled and qualified by inspection, welding each connecting position, fully welding the bottom surface of a feeder steel support with the connecting positions of a horizontal cross beam center positioning block, a rear longitudinal beam support positioning block and a steel structure support, wherein a welding angle on a beam plane cannot be too high in the welding process so as to avoid the influence on the installation position of equipment and grinding;

3) feeder mounting

a. Hoisting the nose-shaped frames in place, leaving a 14mm expansion gap between the two nose-shaped frames, welding after the installation is finished, and finally adding a Sisalan blanket into the gap between the nose-shaped frames and the grate frame for sealing;

b. when the material trolley, the sliding platform, the middle frame and the left and right side wall frames are installed, the installation sequence is from the middle to the two sides; firstly, installing a middle frame in the center, then installing a sliding platform and a feeding trolley, then installing middle frames on two sides, then installing corresponding sliding platforms and trolleys, and finally installing left and right side wall frames;

c. the requirement of the installation verticality of the middle frame is less than or equal to 1mm, and the gasket which does not meet the requirement is used for adjustment; the installation requirement of the sliding platform is that the transverse level is less than or equal to 1mm, the longitudinal level is less than or equal to 2mm, the relative levelness of the track is less than or equal to 0.5mm, and the adjustment which does not meet the requirement is realized by using a gasket;

d. after the middle frame and the sliding platform are aligned, a gasket is arranged between the feeder component and the steel support to ensure that the bolt fastening part cannot deform under stress; after the bolts are fastened, the feeding trolley is installed, and the flatness of a steel plate at the top of the feeding trolley is rechecked after the feeding trolley is installed in place, wherein the flatness is required to be less than or equal to 3 mm; finally, mounting a hydraulic cylinder and a hydraulic cylinder support;

4) grate mounting

a. Checking the steel structure support oblique longitudinal beam, finding out the center lines of the intermediate plate beam and the oblique longitudinal beam, and welding a center positioning block; mounting a barrier strip and a high-density high-strength heat-resistant plate on the inclined longitudinal beam, numbering the heat-resistant plates, taking out the heat-resistant plates, and mounting the fire grate frames when the fire grate frames are hoisted in place to prevent damage;

b. manufacturing five jack seats for adjusting the fire grate frame for later use, and adjusting the fire grate frame; when the grate frame is hoisted in place, the grate frame is placed on the inclined longitudinal beam at an inclination angle of 24 degrees, the frame edge is ensured to be superposed with the marked central line, and the lower end of the grate frame is jacked by a jack to prevent the grate frame from sliding downwards;

c. adjusting the distance between the top end of the grate frame and the contact surface of the steel structure, wherein four rows of grate frames are formed, firstly installing a second row of grate frame, adjusting the grate frame, and finally adjusting by using a jack to ensure that the diagonal error of the grate frame is less than or equal to 1 mm; after all the adjustment is finished, a fire grate frame fixing device is installed;

d. the third row of grate frames has the same installation and adjustment method as the second row, and after the installation and adjustment are finished, the two adjacent longitudinal walls of the second row of grate frames and the third row of grate frames are connected by bolts and the grate frame fixing devices are installed;

e. after the grate frames are installed, the adjacent middle longitudinal walls of the grate frames are clamped tightly by using clamps, a plurality of clamps are arranged at each seam, after the positions of welding seams are ensured to be free of gaps, the adjacent two rows of grate frames are welded, the welding requirement is full and firm, the upper planes of the welding seams are as high as the upper planes of the longitudinal walls, and the protruding parts are polished;

f. after the fire grate frame is completely adjusted, adjusting and connecting a fire grate driving system; the installation of a part of nose type frames of an ash hopper and a feeder of a primary air chamber can be simultaneously carried out, the connecting rod of the driving beam is ensured to be parallel to the longitudinal central line of the rocker arm during the installation, the longitudinal central line of the rocker arm is superposed with the central line of the hydraulic cylinder seat, the copper rod is used for knocking during the installation of the pin shaft, and the initial distance of the hydraulic cylinder is recorded after the adjustment is finished; the travel limit device is removed after the travel limit switch is put into use.

g. After the adjustment of the driving system is finished, a middle longitudinal frame casting begins to be installed, before the casting is installed, the width of a longitudinal wall of frame members of two grates is detected at first, the welding seam between the grates is determined to be welded, the grate frames are polished to be flat, and a tool for fastening a connecting piece is prepared; the castings need to be installed from the lower end of each row upwards in sequence, the combination of the castings and the positioning of the fixing blocks of each section need to be carried out simultaneously so as to avoid dislocation, and the fixing blocks are welded according to requirements; the top casting compresses the side casting tightly, and can not be loosened, after the installation is finished, the height difference of adjacent castings on the same plane is less than or equal to 0.5mm, the straightness is 2mm, the gap between the lap joints of the adjacent castings on the left side and the right side is 2mm, and the overall width of the castings is 200 +/-1 mm; and finally, checking whether the inner space size and the straightness after the casting is installed on each row of grate frames meet the requirements and recording.

h. The left side wall and the right side wall are provided with longitudinal frame castings, the castings are sequentially arranged from the lower end of each stage to the upper end during installation, and the castings are connected with the grate frame longitudinal walls through connecting pieces; the upper castings of the left and right longitudinal frames are required to be connected with the connecting beam of the furnace shell sealing part;

i. after the middle longitudinal wall casting and the left and right longitudinal wall castings are qualified through inspection, the rear material layer adjusting device is installed, and meanwhile, the longitudinal wall castings around the rotating shaft are installed synchronously; after the installation is finished, adjusting the gaps between the rear material layer adjusting device and the middle and left and right longitudinal wall castings to reach a design value, and recording the error smaller than or equal to 2 mm;

5) grate drive system installation

a. Each row of fire grates are controlled by two rocker arms (an upper fire grate and a lower fire grate) to operate, and after the fire grate frame is installed in place, corrected and positioned, the rocker arms are corrected and installed; the rocker arm needs to be installed synchronously with the installation of a steel structure support on the platform;

b. confirming the direction of the rocker arm, the fixed end and the movable end of the bearing seat, and aligning the center position to coincide with the center of the frame during installation; calibrating the rocker arm, adjusting the position of the rocker arm by using a gasket and an adjusting bolt, and installing a connecting rod shaft; checking the center lines of the connecting rods and the rocker arms, and the parallelism of the two connecting rods in the horizontal direction; after the rocker arm is positioned, checking the moving clearance of the moving end, and performing cushion adjustment;

c. a 5T hand-operated hoist is used for pulling the rocker arm to check the running condition, and whether the center of the movable beam moves back to the position and moves back to the position to deviate relative to the center of the frame is checked, wherein the requirement is less than or equal to 0.5 mm; the stroke of the lower grate is 400mm, the stroke of the upper grate is 395mm, and a limit support is arranged;

6) grate segment mounting

a. Each row of fire grate pieces are sequentially installed from top to bottom, clean cotton cloth is used for wiping the connecting surfaces between the fire grate pieces during installation, the fire grate pieces can be completely attached, gaps at two sides are kept the same after each row of fire grate pieces are installed, and bolts are fastened; the gap between the grate plate and the side wall is adjusted by a gasket to meet the installation requirement, the fixed row gap is 3-5mm, and the movable row gap is 4-6 mm; after the qualified positioning blocks are welded, the positioning blocks are firmly adhered and welded at the position close to the central line of the furnace arrangement, and the height of a welding line is 5mm, wherein: the two positioning blocks are respectively a positioning block on the movable grate and a positioning block on the fixed grate;

b. the fire grate segments are connected and fastened through bolts, and after the adjustment of the gap between the fire grate segments and the longitudinal wall casting is finished, fastening nuts are used for spot welding according to the requirements of a drawing; the height difference of the surfaces of adjacent grate segments in each row is less than or equal to 0.5mm, the thickness of the adjusting gasket between adjacent grate segments in the same row is less than or equal to 5mm, and the total thickness of the adjusting gaskets in a single row is less than or equal to 10 mm; the clearance error between the grate segments in the same row and the side wall in the two states of the advance position and the retreat position is less than or equal to 1 mm;

7) slag shaking piece installation

After the grate segment is adjusted and fastened and positioned, the scraper device is installed; when the grate is installed, the connecting surface of the arc-shaped scraping piece is wiped by clean cotton cloth, the gap between the arc-shaped scraping piece and the longitudinal wall casting is 5mm, and the arc-shaped scraping piece and the rear sealing plate of the grate frame are tightly pressed by a asbestos rope; after the installation and adjustment are finished, double nuts of the connecting bolt are fastened to prevent loosening, and the bolt is spot-welded according to the requirements of a drawing;

8) hydraulic cylinder mounting

When the movable grate slides down to the minimum closing height, the center of the bearing seat hole and the center of the rocker arm hole meet the size requirement; the oil pipe interface on the hydraulic cylinder should be at the upper or obliquely upper position so as to facilitate the connection of the oil pipe; after the hydraulic cylinder is installed, controlling a sliding dead point of the grate by using the hydraulic cylinder, removing a positioning support welded on a pull rod, and installing an oil receiving box of the hydraulic cylinder and a support of a limiting device;

9) furnace shell installation

a. The installation sequence of all parts of the furnace shell is as follows: side wall frame mounting → rear wall frame (lower) mounting → front and rear arch frame mounting → front wall frame mounting → rear wall frame (middle) mounting → rear wall frame (upper) mounting → slag hole mounting → furnace bottom column and panel mounting → furnace shell sealing mounting;

b. installing a side wall frame: firstly, determining the positioning points of the transverse and longitudinal central lines of the side wall upright columns, taking the fire grate reference point as an installation longitudinal positioning reference, taking the inner space size of the furnace shell as the transverse positioning size of the upright columns, and marking a positioning reference line; when the stand columns are installed, the top surface elevation of the stand columns is required to be used as a reference, the top surface elevation is adjusted by increasing and decreasing adjusting gaskets on the bottom surfaces of the stand columns, and after all the stand columns are installed, the verticality of the stand columns and the integral flatness requirement of the inner surfaces of the stand columns of the side walls are checked to be less than or equal to 5 mm; welding the side wall panel after acceptance inspection is finished, wherein a reasonable welding sequence is adopted during welding;

c. rear wall frame (lower) installation: determining the positioning size in the transverse direction and the longitudinal direction, drawing the installation center line of each stand column, adjusting the top surface elevation of the stand column by adopting a gasket during installation, and checking that the verticality and the integral planeness of the inner side are less than or equal to 5 mm; after the requirements are met, a rear wall frame (lower) panel and a fire observation hole are installed, and high-temperature glass on the fire observation hole can be installed before debugging in order to prevent damage;

d. the front arch frame and the rear arch frame are installed: the beam is positioned and welded according to requirements, the beam is temporarily supported to prevent the self weight from bending when being installed, the beam is positioned according to the size of a drawing when the hanging beam is installed, and the upper ends of the front arch hanging beam and the rear arch hanging beam are respectively connected with a front wall panel and a rear wall panel;

e. installing a front wall frame: firstly, positioning a crossbeam, and arranging two lifting points during lifting to prevent the crossbeam from deforming; continuously installing the front wall panel and the rib plate after the installation of the cross beam is finished; the front wall panel is overlapped on the outer side of the side wall panel when being installed, and a space with the thickness of the panel is reserved when the cross beam is installed so as to facilitate installation; the rear wall frame (middle and upper) is consistent with the front wall frame;

f. and (3) installing a slag outlet: the slag outlet is divided into an upper section and a lower section, and the upper section and the lower section are integrally hoisted in place after ground combination is completed; firstly, connecting the upper section and the lower section of the slag outlet, then welding, and installing a rib plate after welding is firm; the slag hole is connected with the lower panel of the rear wall and the side wall panel, and the panels are fastened by a connecting piece and then are welded firmly;

g. furnace bottom upright post and panel installation: the upright post sizing block at the bottom of the furnace shell is compact, the position is correct, the welding is firm, and the connection of the sealing plate is reliable;

h. and (3) sealing and installing a furnace shell: the furnace shell seal is divided into three regions, namely, the seal of the lower part of the chute with the front arch and the side wall, the seal of the furnace shell with the connecting beam and the side wall frame, and the seal of the furnace bottom frame with the fire grate and the furnace shell, wherein the seal of each part is strictly installed according to the requirements of drawings;

10) feed hopper and chute combined installation

The installation sequence is as follows: firstly, mounting the lower part of a chute, then mounting the upper part of the chute, and finally mounting a feed hopper; the parts at the lower part of the chute are assembled and installed after being hoisted, the upper part of the chute and the feed hopper are assembled on the ground and then hoisted, and the feed hopper and the chute are hermetically welded after being assembled and adjusted, so that the odor in the garbage can is prevented from leaking;

11) installation of primary air chamber ash bucket and percolate bucket

a. Installation of a percolate bucket: firstly, installing the upper section of the percolate bucket, welding, performing a kerosene penetration test on a welding line after full welding to prevent percolate from leaking due to poor sealing, and then connecting the lower section of the percolate bucket; the manhole door and the door frame are sealed by asbestos ropes and are firmly connected by connecting pieces;

b. ash bucket installation:

the ash bucket is divided into four rows, wherein each row of four ash buckets are respectively an ash bucket (I), an ash bucket (II), an ash bucket (III) and an ash bucket (IV); firstly, combining on the ground, welding, and performing a kerosene penetration test on a welding seam after welding is finished;

secondly, after the grate frame is adjusted, the ash bucket is hoisted in place and welded; before the grate segment is installed, the ash bucket needs to be installed and welded so as to facilitate the hoisting and welding operation of the ash bucket;

12) installation of slag remover

Firstly, determining and scribing transverse and longitudinal datum lines of the slag remover, rechecking the elevation of a civil foundation, adjusting by using an adjusting base plate at the bottom of the slag remover if the elevation is not large, and connecting the slag remover with a slag outlet after the slag remover is adjusted horizontally;

13) hydraulic system installation and flushing

a. Installing hydraulic system pipelines: laying a pipeline, wherein a cold bending method is adopted for bending the pipe; before welding the pipe, a mechanical processing method is adopted for grooving; the pipelines and the pipe joints are welded by full argon arc welding, and an insertion type welding form cannot be adopted;

b. circularly flushing the pipeline:

firstly, adopting an off-station circulating flushing mode, performing circulating flushing by using oil, and connecting a valve platform with a field installation pipeline for partitioned serial flushing; the valve stand needs to be temporarily short-circuited before flushing, and flushing oil is strictly forbidden to enter the valve stand; the pipeline is divided into three parts for circulation flushing: the first part is a fire grate system, the second part is a feeder and sealing door system, and the third part is a slag remover and a material layer adjusting system;

secondly, heating the oil temperature in the oil tank to 40-60 ℃ by using a heater during flushing, increasing the construction oil temperature to 70 ℃ in winter, carrying out primary tapping vibration along the pipeline by using a wooden hammer, a copper hammer and a rubber hammer or using a vibrator every 3-4 h in the flushing process, and uniformly tapping around the periphery of the pipe during tapping so as not to damage the outer surface of the pipe;

flushing work is carried out immediately after the pipeline is welded, and the pipeline is blown and swept by compressed air before flushing oil is injected, so that the flushing efficiency is improved; qualified working oil is injected immediately after the pipeline is qualified by flushing, and equipment needs to be started for circulation every 3 days to prevent the pipeline from being corroded;

after the flushing loop is formed, a flushing pump source is connected to the loop at the end with the larger pipe diameter, and flushes from the main oil return pipe to the direction of the pressure oil pipe, so that sundries in the pipe can be flushed out smoothly; the flushing oil tank is clean and sealed as much as possible, an air filtering device is arranged, and the capacity of the oil tank is five times larger than the flow of the hydraulic pump; when oil is filled into the oil tank, a plate type oil filter is adopted to filter the oil;

fifthly, the oil for flushing the pipeline needs to be filtered before an oil return tank, and the filter element precision of the large-specification pipeline type oil return filter is replaced according to the oil cleaning condition in different flushing stages;

sixthly, selecting a flushing medium: the flushing medium is compatible with the working medium of the system itself, with the seal and with the lowest possible viscosity;

seventhly, the requirements of replacing the filter core in the flushing loop and flushing the sample are as follows: sampling inspection is carried out on the upstream of the return oil filter, impurities are more in the initial flushing stage, the filter element needs to be replaced at intervals of 4h, the filter element can be replaced at 8h in the subsequent stage along with the reduction of dirt, when the flushing time reaches 24h, sampling inspection can be carried out when the accuracy grade of oil is close to the requirement, and sampling is carried out once every 8 h;

14) debugging

a. Testing the single feeder in a test run: firstly, carrying out single feeder test run, controlling the speed according to 40% of the working speed, adjusting the position of a travel switch in a inching mode, and carrying out linkage test run on the feeder after the debugging and detection are qualified;

b. carrying out single-machine trial run detection on the fire grate pieces: adjusting the position of a travel switch, controlling the speed according to 40% of working speed, adjusting the position of the travel switch by inching, and performing linkage test run after debugging and detection are qualified; and finally, performing linkage trial run detection on the feeder and the grate until the detection is qualified.

The incinerator consists of a feed hopper, a chute, a feeder, a grate, a steel structure support, a furnace shell, a primary air chamber ash hopper, a percolate hopper, a slag remover, an overhaul platform, a hydraulic system and a centralized lubricating system.

The pipeline circulating flushing adopts a flushing pump station and N32 hydraulic oil to flush the oil pipeline, and during flushing flow, calculation is carried out according to the size of the pipeline and the form of a loop, so that oil in the pipeline is ensured to be in a turbulent flow state, and the flow velocity of the oil in the pipeline is more than or equal to 3 m/s; the flow velocity in the washing operation pipe is 2 times of the working flow velocity and is in a turbulent flow state.

And in the step 13), when the cleanliness of the flushing liquid meets the requirement through inspection, the flushing liquid is completely ejected out by using 0.8MPa of compressed air, and working hydraulic oil is injected as soon as possible.

The invention has the following positive beneficial effects:

1. the invention optimizes the construction procedure and process, provides necessary guidance for the installation and construction of the reverse-push mechanical grate garbage incinerator, shortens the installation period, improves the construction quality and ensures the smooth operation of the whole set of the unit.

2. According to the invention, the pipeline is circularly washed by using oil, so that mechanical impurities or other particles left in the pipeline installation process and the hydraulic component manufacturing process can be removed, the cleanliness required by the normal operation of a hydraulic system is achieved, the reliable operation of equipment is ensured, and the service life of the hydraulic component in the system is prolonged; the pipeline is divided into three parts for washing, so that the washing efficiency is improved, and the washing period is saved.

The specific implementation mode is as follows:

the invention is further explained and illustrated below:

example (b): a reverse-push mechanical grate garbage incinerator installation and construction method is characterized in that: the method comprises the following steps:

A. construction preparation:

1) counting the accessories, placing the accessories in order and making a moisture-proof measure;

2) the method comprises the following steps of marking out a foundation, determining longitudinal and transverse datum lines of an incinerator, determining longitudinal and transverse center lines of a steel frame column base according to a marked longitudinal axis, measuring distances between adjacent axes point by point, and carrying out overall diagonal measurement;

3) marking the steel frame, marking the upright column according to the drawing size, marking a 1m height mark line from the top of the upright column downwards, and marking; marking a central line on the upright column so as to be convenient for vertical alignment measurement;

B. the method comprises the following specific steps:

1) the installation of the upright post and the horizontal beam:

a. the longitudinal and transverse reference lines of the incinerator are determined by taking the central line of the waste heat boiler as the reference, and after the longitudinal and transverse reference lines and the basic elevation of the incinerator are determined, a lower upright post and a horizontal cross beam can be installed;

b. finding out the cross line of each upright column on the basis, similarly finding out the center line of the cross on the steel column, wherein the plumb tolerance of the upright columns is 3 mm; after the upright posts are installed and adjusted, the upright posts are welded firmly, and after the upright posts are installed, surfacing is carried out; the height of the upper top surface of the upright post is adjusted according to the actual elevation sizing block, and the height difference of the upper top surfaces of the upright posts is 2 mm; the vertical and horizontal center lines of the upper plane of the horizontal beam must be superposed with the vertical and horizontal center lines of the foundation, and the allowance of the upper plane of the horizontal beam is 2 mm;

c. after the horizontal cross beam is installed, measuring and marking out longitudinal and transverse installation datum lines of the grate and feeder steel structure support by using a level gauge, and marking out installation positioning datum lines of the other four horizontal longitudinal beams and the inclined longitudinal beams to two sides respectively by taking a longitudinal central line as a standard; after the installation and acceptance of the upright columns and the horizontal cross beams are finished, foundation grouting is carried out;

2) the feeder steel structure supports and installs:

a. sheet beam installation:

firstly, a single furnace steel structure support comprises five groups of sheet beams, each sheet beam is subjected to positioning sample application blunderpunch when leaving a factory, each sheet beam consists of a rear longitudinal beam and a front steel structure, the rear longitudinal beam and the front horizontal beam are connected by bolts, a butt joint part is welded firmly after the straightness of the rear longitudinal beam and the front horizontal beam is confirmed to be qualified, and the height difference between a rear supporting point and a front supporting point is measured by a stay wire; finding out the height required by the rear supporting point by taking the top surface of the horizontal cross beam at the front part as a reference, and adjusting to the elevation of the drawing by using an adjusting base plate;

secondly, finding out longitudinal and transverse installation datum lines on the horizontal cross beam and the rear foundation embedded plate, and determining the installation position of the plate beam; before the sheet beam is installed, the height difference of the installation part of the sheet beam at the upper part of the horizontal cross beam is adjusted to the requirement of a drawing by using a gasket, and the height difference is ensured to be within 2 mm; during installation, the positioning point of each group of plate beams is required to be superposed with the scribed installation reference line on the horizontal cross beam;

sequentially hoisting and fixing the five groups of plate beams in place, firstly correcting the middle plate beam, welding temporary positioning blocks to fix the middle plate beam in the front-back and left-right directions, and then sequentially aligning the middle plate beam to two sides; after the sheet beam and the rear longitudinal beam are installed and fixed, checking whether the longitudinal and transverse installation positions of the sheet beam are qualified or not, and checking the verticality of the sheet beam by using a suspension wire, wherein the tolerance is less than or equal to 1 mm;

b. the feeder supports the connecting beam to be installed:

firstly, after the installation and acceptance of the plate beams are finished, the installation of grate driving hydraulic cylinder beams, front and rear inclined column reinforcing beams, plate beam front bracing, rear longitudinal beam bracing and other bottom connecting beams are carried out, all the connecting beams are sequentially installed towards two sides by taking a middle plate beam as a reference in the installation sequence, the space of each group of plate beams is ensured to be consistent with a drawing in the installation process, the space is adjusted by a gasket, and the tolerance is less than or equal to 2 mm;

secondly, when the upright columns and the front short inclined columns on the bottom plane of the plate girder are installed, the verticality of the upright columns and the angles of the short inclined columns are ensured, and bolts of all connecting surfaces are firmly connected and reliably fixed;

after the bottom connecting beam and the upright post are installed, the grate rocker arm and the percolate bucket are stored in place, the installation of a top plane connecting beam and an inclined strut is started, the flatness of a feeder supporting platform must be guaranteed when the top beam is installed and connected, and the tolerance is less than 5 mm; meanwhile, the requirements of the inside opening, the length and the diagonal size of each feeder supporting platform are met, the difference value of the diagonal lines in the allowance is less than or equal to 3mm, and the difference value of the large diagonal lines is less than or equal to 3 mm;

aligning the feeder supporting platform in sequence towards two sides by taking the middle sheet beam as a reference, adjusting the opening and the diagonal size by using an adjusting gasket, completely welding the feeder supporting steel structure after all the steel structure is installed and inspected, and preventing welding deformation by adopting symmetrical welding and paying attention to the welding speed during welding;

c. installing an oblique longitudinal beam:

firstly, taking the horizontal direction as a reference, setting the installation angle of the oblique longitudinal beams to be 24 degrees, and enabling the longitudinal central line of each oblique longitudinal beam to be superposed with the central line of the sheet beam, wherein the straightness tolerance of the oblique longitudinal beam is +/-3 mm;

when the oblique longitudinal beams are installed, the oblique longitudinal beams in the middle are installed, and the oblique longitudinal beams are installed in place and then sequentially installed towards the two sides; firstly, installing a sliding support base plate below an oblique longitudinal beam in place, and adjusting the sliding support base plate to the elevation size of a drawing by adjusting the base plate; the middle oblique longitudinal beam is a positioning beam, and after the middle oblique longitudinal beam is installed in place, a positioning block is installed on a lower support to ensure that the central line is not changed in the subsequent installation process; then, mounting left and right side oblique longitudinal beams, and reserving enough mounting allowance for bracing mounting of the oblique longitudinal beams in the mounting process;

thirdly, after the installation and adjustment of the inclined longitudinal beams are finished, the inclined longitudinal beam bracing can be installed, the installation sequence is sequentially installed from the middle to two sides, the supports below the left and right side inclined longitudinal beams are temporarily positioned after the alignment is finished, formal positioning blocks are installed after the grate frame is installed, the positioning blocks on two sides are gapless after the positioning block of the middle positioning inclined longitudinal beam is installed, the rest inclined longitudinal beams are movable beams, and a gap of 5mm is formed between the positioning block and the base;

fastening the bolts, opening the gear, and adjusting the diagonal lines and the angles by taking the middle positioning inclined longitudinal beams as the reference, wherein the inclined longitudinal beams are arranged in the same plane, the planeness of the adjacent inclined longitudinal beams is less than or equal to 3mm, the whole planeness is less than or equal to 5mm, the difference value of the large diagonal lines is less than or equal to 5mm, and the difference value of the small diagonal lines is less than or equal to 3 mm; after the acceptance is qualified, full welding is carried out on the flange at the joint;

d. welding a steel structure:

after the whole steel structure is assembled and qualified by inspection, welding each connecting position, fully welding the bottom surface of a feeder steel support with the connecting positions of a horizontal cross beam center positioning block, a rear longitudinal beam support positioning block and a steel structure support, wherein a welding angle on a beam plane cannot be too high in the welding process so as to avoid the influence on the installation position of equipment and grinding;

3) feeder mounting

a. Hoisting the nose-shaped frames in place, leaving a 14mm expansion gap between the two nose-shaped frames, welding after the installation is finished, and finally adding a Sisalan blanket into the gap between the nose-shaped frames and the grate frame for sealing;

b. when the material trolley, the sliding platform, the middle frame and the left and right side wall frames are installed, the installation sequence is from the middle to the two sides; firstly, installing a middle frame in the center, then installing a sliding platform and a feeding trolley, then installing middle frames on two sides, then installing corresponding sliding platforms and trolleys, and finally installing left and right side wall frames;

c. the requirement of the installation verticality of the middle frame is less than or equal to 1mm, and the gasket which does not meet the requirement is used for adjustment; the installation requirement of the sliding platform is that the transverse level is less than or equal to 1mm, the longitudinal level is less than or equal to 2mm, the relative levelness of the track is less than or equal to 0.5mm, and the adjustment which does not meet the requirement is realized by using a gasket;

d. after the middle frame and the sliding platform are aligned, a gasket is arranged between the feeder component and the steel support to ensure that the bolt fastening part cannot deform under stress; after the bolts are fastened, the feeding trolley is installed, and the flatness of a steel plate at the top of the feeding trolley is rechecked after the feeding trolley is installed in place, wherein the flatness is required to be less than or equal to 3 mm; finally, mounting a hydraulic cylinder and a hydraulic cylinder support;

4) grate mounting

a. Checking the steel structure support oblique longitudinal beam, finding out the center lines of the intermediate plate beam and the oblique longitudinal beam, and welding a center positioning block; mounting a barrier strip and a high-density high-strength heat-resistant plate on the inclined longitudinal beam, numbering the heat-resistant plates, taking out the heat-resistant plates, and mounting the fire grate frames when the fire grate frames are hoisted in place to prevent damage;

b. manufacturing five jack seats for adjusting the fire grate frame for later use, and adjusting the fire grate frame; when the grate frame is hoisted in place, the grate frame is placed on the inclined longitudinal beam at an inclination angle of 24 degrees, the frame edge is ensured to be superposed with the marked central line, and the lower end of the grate frame is jacked by a jack to prevent the grate frame from sliding downwards;

c. adjusting the distance between the top end of the grate frame and the contact surface of the steel structure, wherein four rows of grate frames are formed, firstly installing a second row of grate frame, adjusting the grate frame, and finally adjusting by using a jack to ensure that the diagonal error of the grate frame is less than or equal to 1 mm; after all the adjustment is finished, a fire grate frame fixing device is installed;

d. the third row of grate frames has the same installation and adjustment method as the second row, and after the installation and adjustment are finished, the two adjacent longitudinal walls of the second row of grate frames and the third row of grate frames are connected by bolts and the grate frame fixing devices are installed;

e. after the grate frames are installed, the adjacent middle longitudinal walls of the grate frames are clamped tightly by using clamps, a plurality of clamps are arranged at each seam, after the positions of welding seams are ensured to be free of gaps, the adjacent two rows of grate frames are welded, the welding requirement is full and firm, the upper planes of the welding seams are as high as the upper planes of the longitudinal walls, and the protruding parts are polished;

f. after the fire grate frame is completely adjusted, adjusting and connecting a fire grate driving system; the installation of a part of nose type frames of an ash hopper and a feeder of a primary air chamber can be simultaneously carried out, the connecting rod of the driving beam is ensured to be parallel to the longitudinal central line of the rocker arm during the installation, the longitudinal central line of the rocker arm is superposed with the central line of the hydraulic cylinder seat, the copper rod is used for knocking during the installation of the pin shaft, and the initial distance of the hydraulic cylinder is recorded after the adjustment is finished; the travel limit device is removed after the travel limit switch is put into use.

g. After the adjustment of the driving system is finished, a middle longitudinal frame casting begins to be installed, before the casting is installed, the width of a longitudinal wall of frame members of two grates is detected at first, the welding seam between the grates is determined to be welded, the grate frames are polished to be flat, and a tool for fastening a connecting piece is prepared; the castings need to be installed from the lower end of each row upwards in sequence, the combination of the castings and the positioning of the fixing blocks of each section need to be carried out simultaneously so as to avoid dislocation, and the fixing blocks are welded according to requirements; the top casting compresses the side casting tightly, and can not be loosened, after the installation is finished, the height difference of adjacent castings on the same plane is less than or equal to 0.5mm, the straightness is 2mm, the gap between the lap joints of the adjacent castings on the left side and the right side is 2mm, and the overall width of the castings is 200 +/-1 mm; and finally, checking whether the inner space size and the straightness after the casting is installed on each row of grate frames meet the requirements and recording.

h. The left side wall and the right side wall are provided with longitudinal frame castings, the castings are sequentially arranged from the lower end of each stage to the upper end during installation, and the castings are connected with the grate frame longitudinal walls through connecting pieces; the upper castings of the left and right longitudinal frames are required to be connected with the connecting beam of the furnace shell sealing part;

i. after the middle longitudinal wall casting and the left and right longitudinal wall castings are qualified through inspection, the rear material layer adjusting device is installed, and meanwhile, the longitudinal wall castings around the rotating shaft are installed synchronously; after the installation is finished, adjusting the gaps between the rear material layer adjusting device and the middle and left and right longitudinal wall castings to reach a design value, and recording the error smaller than or equal to 2 mm;

5) grate drive system installation

a. Each row of fire grates are controlled by two rocker arms (an upper fire grate and a lower fire grate) to operate, and after the fire grate frame is installed in place, corrected and positioned, the rocker arms are corrected and installed; the rocker arm needs to be installed synchronously with the installation of a steel structure support on the platform;

b. confirming the direction of the rocker arm, the fixed end and the movable end of the bearing seat, and aligning the center position to coincide with the center of the frame during installation; calibrating the rocker arm, adjusting the position of the rocker arm by using a gasket and an adjusting bolt, and installing a connecting rod shaft; checking the center lines of the connecting rods and the rocker arms, and the parallelism of the two connecting rods in the horizontal direction; after the rocker arm is positioned, checking the moving clearance of the moving end, and performing cushion adjustment;

c. a 5T hand-operated hoist is used for pulling the rocker arm to check the running condition, and whether the center of the movable beam moves back to the position and moves back to the position to deviate relative to the center of the frame is checked, wherein the requirement is less than or equal to 0.5 mm; the stroke of the lower grate is 400mm, the stroke of the upper grate is 395mm, and a limit support is arranged;

6) grate segment mounting

a. Each row of fire grate pieces are sequentially installed from top to bottom, clean cotton cloth is used for wiping the connecting surfaces between the fire grate pieces during installation, the fire grate pieces can be completely attached, gaps at two sides are kept the same after each row of fire grate pieces are installed, and bolts are fastened; the gap between the grate plate and the side wall is adjusted by a gasket to meet the installation requirement, the fixed row gap is 3-5mm, and the movable row gap is 4-6 mm; after the qualified positioning blocks are welded, the positioning blocks are firmly adhered and welded at the position close to the central line of the furnace arrangement, and the height of a welding line is 5mm, wherein: the two positioning blocks are respectively a positioning block on the movable grate and a positioning block on the fixed grate;

b. the fire grate segments are connected and fastened through bolts, and after the adjustment of the gap between the fire grate segments and the longitudinal wall casting is finished, fastening nuts are used for spot welding according to the requirements of a drawing; the height difference of the surfaces of adjacent grate segments in each row is less than or equal to 0.5mm, the thickness of the adjusting gasket between adjacent grate segments in the same row is less than or equal to 5mm, and the total thickness of the adjusting gaskets in a single row is less than or equal to 10 mm; the clearance error between the grate segments in the same row and the side wall in the two states of the advance position and the retreat position is less than or equal to 1 mm;

7) slag shaking piece installation

After the grate segment is adjusted and fastened and positioned, the scraper device is installed; when the grate is installed, the connecting surface of the arc-shaped scraping piece is wiped by clean cotton cloth, the gap between the arc-shaped scraping piece and the longitudinal wall casting is 5mm, and the arc-shaped scraping piece and the rear sealing plate of the grate frame are tightly pressed by a asbestos rope; after the installation and adjustment are finished, double nuts of the connecting bolt are fastened to prevent loosening, and the bolt is spot-welded according to the requirements of a drawing;

8) hydraulic cylinder mounting

When the movable grate slides down to the minimum closing height, the center of the bearing seat hole and the center of the rocker arm hole meet the size requirement; the oil pipe interface on the hydraulic cylinder should be at the upper or obliquely upper position so as to facilitate the connection of the oil pipe; after the hydraulic cylinder is installed, controlling a sliding dead point of the grate by using the hydraulic cylinder, removing a positioning support welded on a pull rod, and installing an oil receiving box of the hydraulic cylinder and a support of a limiting device;

9) furnace shell installation

a. The installation sequence of all parts of the furnace shell is as follows: side wall frame mounting → rear wall frame (lower) mounting → front and rear arch frame mounting → front wall frame mounting → rear wall frame (middle) mounting → rear wall frame (upper) mounting → slag hole mounting → furnace bottom column and panel mounting → furnace shell sealing mounting;

b. installing a side wall frame: firstly, determining the positioning points of the transverse and longitudinal central lines of the side wall upright columns, taking the fire grate reference point as an installation longitudinal positioning reference, taking the inner space size of the furnace shell as the transverse positioning size of the upright columns, and marking a positioning reference line; when the stand columns are installed, the top surface elevation of the stand columns is required to be used as a reference, the top surface elevation is adjusted by increasing and decreasing adjusting gaskets on the bottom surfaces of the stand columns, and after all the stand columns are installed, the verticality of the stand columns and the integral flatness requirement of the inner surfaces of the stand columns of the side walls are checked to be less than or equal to 5 mm; welding the side wall panel after acceptance inspection is finished, wherein a reasonable welding sequence is adopted during welding;

c. rear wall frame (lower) installation: determining the positioning size in the transverse direction and the longitudinal direction, drawing the installation center line of each stand column, adjusting the top surface elevation of the stand column by adopting a gasket during installation, and checking that the verticality and the integral planeness of the inner side are less than or equal to 5 mm; after the requirements are met, a rear wall frame (lower) panel and a fire observation hole are installed, and high-temperature glass on the fire observation hole can be installed before debugging in order to prevent damage;

d. the front arch frame and the rear arch frame are installed: the beam is positioned and welded according to requirements, the beam is temporarily supported to prevent the self weight from bending when being installed, the beam is positioned according to the size of a drawing when the hanging beam is installed, and the upper ends of the front arch hanging beam and the rear arch hanging beam are respectively connected with a front wall panel and a rear wall panel;

e. installing a front wall frame: firstly, positioning a crossbeam, and arranging two lifting points during lifting to prevent the crossbeam from deforming; continuously installing the front wall panel and the rib plate after the installation of the cross beam is finished; the front wall panel is overlapped on the outer side of the side wall panel when being installed, and a space with the thickness of the panel is reserved when the cross beam is installed so as to facilitate installation; the rear wall frame (middle and upper) is consistent with the front wall frame;

f. and (3) installing a slag outlet: the slag outlet is divided into an upper section and a lower section, and the upper section and the lower section are integrally hoisted in place after ground combination is completed; firstly, connecting the upper section and the lower section of the slag outlet, then welding, and installing a rib plate after welding is firm; the slag hole is connected with the lower panel of the rear wall and the side wall panel, and the panels are fastened by a connecting piece and then are welded firmly;

g. furnace bottom upright post and panel installation: the upright post sizing block at the bottom of the furnace shell is compact, the position is correct, the welding is firm, and the connection of the sealing plate is reliable;

h. and (3) sealing and installing a furnace shell: the furnace shell seal is divided into three regions, namely, the seal of the lower part of the chute with the front arch and the side wall, the seal of the furnace shell with the connecting beam and the side wall frame, and the seal of the furnace bottom frame with the fire grate and the furnace shell, wherein the seal of each part is strictly installed according to the requirements of drawings;

10) feed hopper and chute combined installation

The installation sequence is as follows: firstly, mounting the lower part of a chute, then mounting the upper part of the chute, and finally mounting a feed hopper; the parts at the lower part of the chute are assembled and installed after being hoisted, the upper part of the chute and the feed hopper are assembled on the ground and then hoisted, and the feed hopper and the chute are hermetically welded after being assembled and adjusted, so that the odor in the garbage can is prevented from leaking;

12) installation of primary air chamber ash bucket and percolate bucket

a. Installation of a percolate bucket: firstly, installing the upper section of the percolate bucket, welding, performing a kerosene penetration test on a welding line after full welding to prevent percolate from leaking due to poor sealing, and then connecting the lower section of the percolate bucket; the manhole door and the door frame are sealed by asbestos ropes and are firmly connected by connecting pieces;

b. ash bucket installation:

the ash bucket is divided into four rows, wherein each row of four ash buckets are respectively an ash bucket (I), an ash bucket (II), an ash bucket (III) and an ash bucket (IV); firstly, combining on the ground, welding, and performing a kerosene penetration test on a welding seam after welding is finished;

secondly, after the grate frame is adjusted, the ash bucket is hoisted in place and welded; before the grate segment is installed, the ash bucket needs to be installed and welded so as to facilitate the hoisting and welding operation of the ash bucket;

12) installation of slag remover

Firstly, determining and scribing transverse and longitudinal datum lines of the slag remover, rechecking the elevation of a civil foundation, adjusting by using an adjusting base plate at the bottom of the slag remover if the elevation is not large, and connecting the slag remover with a slag outlet after the slag remover is adjusted horizontally;

13) hydraulic system installation and flushing

a. Installing hydraulic system pipelines: laying a pipeline, wherein a cold bending method is adopted for bending the pipe; before welding the pipe, a mechanical processing method is adopted for grooving; the pipelines and the pipe joints are welded by full argon arc welding, and an insertion type welding form cannot be adopted;

b. circularly flushing the pipeline:

firstly, adopting an off-station circulating flushing mode, performing circulating flushing by using oil, and connecting a valve platform with a field installation pipeline for partitioned serial flushing; the valve stand needs to be temporarily short-circuited before flushing, and flushing oil is strictly forbidden to enter the valve stand; the pipeline is divided into three parts for circulation flushing: the first part is a fire grate system, the second part is a feeder and sealing door system, and the third part is a slag remover and a material layer adjusting system;

secondly, heating the oil temperature in the oil tank to 40-60 ℃ by using a heater during flushing, increasing the construction oil temperature to 70 ℃ in winter, carrying out primary tapping vibration along the pipeline by using a wooden hammer, a copper hammer and a rubber hammer or using a vibrator every 3-4 h in the flushing process, and uniformly tapping around the periphery of the pipe during tapping so as not to damage the outer surface of the pipe;

flushing work is carried out immediately after the pipeline is welded, and the pipeline is blown and swept by compressed air before flushing oil is injected, so that the flushing efficiency is improved; qualified working oil is injected immediately after the pipeline is qualified by flushing, and equipment needs to be started for circulation every 3 days to prevent the pipeline from being corroded;

after the flushing loop is formed, a flushing pump source is connected to the loop at the end with the larger pipe diameter, and flushes from the main oil return pipe to the direction of the pressure oil pipe, so that sundries in the pipe can be flushed out smoothly; the flushing oil tank is clean and sealed as much as possible, an air filtering device is arranged, and the capacity of the oil tank is five times larger than the flow of the hydraulic pump; when oil is filled into the oil tank, a plate type oil filter is adopted to filter the oil;

fifthly, the oil for flushing the pipeline needs to be filtered before an oil return tank, and the filter element precision of the large-specification pipeline type oil return filter is replaced according to the oil cleaning condition in different flushing stages;

sixthly, selecting a flushing medium: the flushing medium is compatible with the working medium of the system itself, with the seal and with the lowest possible viscosity;

seventhly, the requirements of replacing the filter core in the flushing loop and flushing the sample are as follows: sampling inspection is carried out on the upstream of the return oil filter, impurities are more in the initial flushing stage, the filter element needs to be replaced at intervals of 4h, the filter element can be replaced at 8h in the subsequent stage along with the reduction of dirt, when the flushing time reaches 24h, sampling inspection can be carried out when the accuracy grade of oil is close to the requirement, and sampling is carried out once every 8 h;

14) debugging

a. Testing the single feeder in a test run: firstly, carrying out single feeder test run, controlling the speed according to 40% of the working speed, adjusting the position of a travel switch in a inching mode, and carrying out linkage test run on the feeder after the debugging and detection are qualified;

b. carrying out single-machine trial run detection on the fire grate pieces: adjusting the position of a travel switch, controlling the speed according to 40% of working speed, adjusting the position of the travel switch by inching, and performing linkage test run after debugging and detection are qualified; and finally, performing linkage trial run detection on the feeder and the grate until the detection is qualified.

Wherein: the incinerator consists of a feed hopper, a chute, a feeder, a grate, a steel structure support, a furnace shell, a primary air chamber ash hopper, a percolate hopper, a slag remover, an overhaul platform, a hydraulic system and a centralized lubricating system.

The pipeline circulating flushing adopts a flushing pump station and N32 hydraulic oil to flush the oil pipeline, and the cleanliness is not lower than NAS1638-8 level;

in the above description, the process flow and parameters of the circular washing are as follows:

flushing flow rate: calculating according to the size of the pipe diameter and the loop form to ensure that the oil flow in the pipeline is in a turbulent flow state, and the flow velocity of the oil flow in the pipeline is above 3 m/s; the flow velocity in the washing operation pipe is at least 2 times of the working flow velocity and is in a turbulent flow state, and the minimum washing flow and the flow velocity are calculated according to the following formula: minimum flush flow: q ═ 6V ═ A (L/min)

Wherein: a: pipe cross-sectional area (c square meter)

A: minimum flow velocity (m/s) v =0.2m/s for generating turbulence

The allowable flow speed V of the common hose is less than or equal to 6m/s

m: kinematic viscosity mm/s of flushing medium

d: inner diameter (cm) of flushing pipe

Flushing pressure: during flushing, the flushing pressure is greater than the resistance of the flushing loop;

③ vibrating: in order to thoroughly remove iron oxide scales, welding and impurities adhered to the pipe wall, a wooden hammer, a copper hammer and a rubber hammer are used or a vibrator is used for knocking and vibrating once along the pipeline from head to tail at intervals of 3-4 h in the washing process; knocking welded junctions, flanges, reducing holes, elbows, tees and the like; when in beating, the pipe is beaten around the periphery of the pipe uniformly, so that the outer surface of the pipe cannot be damaged;

fourthly, top gas: when the cleanliness of the flushing liquid reaches NAS1638-7 grade after inspection, the flushing liquid is completely ejected out by using 0.8MPa compressed air, and working hydraulic oil is injected as soon as possible.

The invention optimizes the construction procedure and the construction process; the construction quality is improved, the construction period is shortened, and the smooth operation of the whole set of the unit is ensured.

Claims (4)

1. A reverse-push mechanical grate garbage incinerator installation and construction method is characterized in that: the method comprises the following steps:

A. construction preparation:

1) counting the accessories, placing the accessories in order and making a moisture-proof measure;

2) the method comprises the following steps of marking out a foundation, determining longitudinal and transverse datum lines of an incinerator, determining longitudinal and transverse center lines of a steel frame column base according to a marked longitudinal axis, measuring distances between adjacent axes point by point, and carrying out overall diagonal measurement;

3) marking the steel frame, marking the upright column according to the drawing size, marking a 1m height mark line from the top of the upright column downwards, and marking; marking a central line on the upright column so as to be convenient for vertical alignment measurement;

B. the method comprises the following specific steps:

1) the installation of the upright post and the horizontal beam:

a. the longitudinal and transverse reference lines of the incinerator are determined by taking the central line of the waste heat boiler as the reference, and after the longitudinal and transverse reference lines and the basic elevation of the incinerator are determined, a lower upright post and a horizontal cross beam can be installed;

b. finding out the cross line of each upright column on the basis, similarly finding out the center line of the cross on the steel column, wherein the plumb tolerance of the upright columns is 3 mm; after the upright posts are installed and adjusted, the upright posts are welded firmly, and after the upright posts are installed, surfacing is carried out; the height of the upper top surface of the upright post is adjusted according to the actual elevation sizing block, and the height difference of the upper top surfaces of the upright posts is 2 mm; the vertical and horizontal center lines of the upper plane of the horizontal beam must be superposed with the vertical and horizontal center lines of the foundation, and the allowance of the upper plane of the horizontal beam is 2 mm;

c. after the horizontal cross beam is installed, measuring and marking out longitudinal and transverse installation datum lines of the grate and feeder steel structure support by using a level gauge, and marking out installation positioning datum lines of the other four horizontal longitudinal beams and the inclined longitudinal beams to two sides respectively by taking a longitudinal central line as a standard; after the installation and acceptance of the upright columns and the horizontal cross beams are finished, foundation grouting is carried out;

2) the feeder steel structure supports and installs:

a. sheet beam installation:

firstly, a single furnace steel structure support comprises five groups of sheet beams, each sheet beam is subjected to positioning sample application blunderpunch when leaving a factory, each sheet beam consists of a rear longitudinal beam and a front steel structure, the rear longitudinal beam and the front horizontal beam are connected by bolts, a butt joint part is welded firmly after the straightness of the rear longitudinal beam and the front horizontal beam is confirmed to be qualified, and the height difference between a rear supporting point and a front supporting point is measured by a stay wire; finding out the height required by the rear supporting point by taking the top surface of the horizontal cross beam at the front part as a reference, and adjusting to the elevation of the drawing by using an adjusting base plate;

secondly, finding out longitudinal and transverse installation datum lines on the horizontal cross beam and the rear foundation embedded plate, and determining the installation position of the plate beam; before the sheet beam is installed, the height difference of the installation part of the sheet beam at the upper part of the horizontal cross beam is adjusted to the requirement of a drawing by using a gasket, and the height difference is ensured to be within 2 mm; during installation, the positioning point of each group of plate beams is required to be superposed with the scribed installation reference line on the horizontal cross beam;

sequentially hoisting and fixing the five groups of plate beams in place, firstly correcting the middle plate beam, welding temporary positioning blocks to fix the middle plate beam in the front-back and left-right directions, and then sequentially aligning the middle plate beam to two sides; after the sheet beam and the rear longitudinal beam are installed and fixed, checking whether the longitudinal and transverse installation positions of the sheet beam are qualified or not, and checking the verticality of the sheet beam by using a suspension wire, wherein the tolerance is less than or equal to 1 mm;

b. the feeder supports the connecting beam to be installed:

firstly, after the installation and acceptance of the plate beams are finished, the installation of grate driving hydraulic cylinder beams, front and rear inclined column reinforcing beams, plate beam front bracing, rear longitudinal beam bracing and other bottom connecting beams are carried out, all the connecting beams are sequentially installed towards two sides by taking a middle plate beam as a reference in the installation sequence, the space of each group of plate beams is ensured to be consistent with a drawing in the installation process, the space is adjusted by a gasket, and the tolerance is less than or equal to 2 mm;

secondly, when the upright columns and the front short inclined columns on the bottom plane of the plate girder are installed, the verticality of the upright columns and the angles of the short inclined columns are ensured, and bolts of all connecting surfaces are firmly connected and reliably fixed;

after the bottom connecting beam and the upright post are installed, the grate rocker arm and the percolate bucket are stored in place, the installation of a top plane connecting beam and an inclined strut is started, the flatness of a feeder supporting platform must be guaranteed when the top beam is installed and connected, and the tolerance is less than 5 mm; meanwhile, the requirements of the inside opening, the length and the diagonal size of each feeder supporting platform are met, the difference value of the diagonal lines in the allowance is less than or equal to 3mm, and the difference value of the large diagonal lines is less than or equal to 3 mm;

aligning the feeder supporting platform in sequence towards two sides by taking the middle sheet beam as a reference, adjusting the opening and the diagonal size by using an adjusting gasket, completely welding the feeder supporting steel structure after all the steel structure is installed and inspected, and preventing welding deformation by adopting symmetrical welding and paying attention to the welding speed during welding;

c. installing an oblique longitudinal beam:

firstly, taking the horizontal direction as a reference, setting the installation angle of the oblique longitudinal beams to be 24 degrees, and enabling the longitudinal central line of each oblique longitudinal beam to be superposed with the central line of the sheet beam, wherein the straightness tolerance of the oblique longitudinal beam is +/-3 mm;

when the oblique longitudinal beams are installed, the oblique longitudinal beams in the middle are installed, and the oblique longitudinal beams are installed in place and then sequentially installed towards the two sides; firstly, installing a sliding support base plate below an oblique longitudinal beam in place, and adjusting the sliding support base plate to the elevation size of a drawing by adjusting the base plate; the middle oblique longitudinal beam is a positioning beam, and after the middle oblique longitudinal beam is installed in place, a positioning block is installed on a lower support to ensure that the central line is not changed in the subsequent installation process; then, mounting left and right side oblique longitudinal beams, and reserving enough mounting allowance for bracing mounting of the oblique longitudinal beams in the mounting process;

thirdly, after the installation and adjustment of the inclined longitudinal beams are finished, the inclined longitudinal beam bracing can be installed, the installation sequence is sequentially installed from the middle to two sides, the supports below the left and right side inclined longitudinal beams are temporarily positioned after the alignment is finished, formal positioning blocks are installed after the grate frame is installed, the positioning blocks on two sides are gapless after the positioning block of the middle positioning inclined longitudinal beam is installed, the rest inclined longitudinal beams are movable beams, and a gap of 5mm is formed between the positioning block and the base;

fastening the bolts, opening the gear, and adjusting the diagonal lines and the angles by taking the middle positioning inclined longitudinal beams as the reference, wherein the inclined longitudinal beams are arranged in the same plane, the planeness of the adjacent inclined longitudinal beams is less than or equal to 3mm, the whole planeness is less than or equal to 5mm, the difference value of the large diagonal lines is less than or equal to 5mm, and the difference value of the small diagonal lines is less than or equal to 3 mm; after the acceptance is qualified, full welding is carried out on the flange at the joint;

d. welding a steel structure:

after the whole steel structure is assembled and qualified by inspection, welding each connecting position, fully welding the bottom surface of a feeder steel support with the connecting positions of a horizontal cross beam center positioning block, a rear longitudinal beam support positioning block and a steel structure support, wherein a welding angle on a beam plane cannot be too high in the welding process so as to avoid the influence on the installation position of equipment and grinding;

3) feeder mounting

a. Hoisting the nose-shaped frames in place, leaving a 14mm expansion gap between the two nose-shaped frames, welding after the installation is finished, and finally adding a Sisalan blanket into the gap between the nose-shaped frames and the grate frame for sealing;

b. when the material trolley, the sliding platform, the middle frame and the left and right side wall frames are installed, the installation sequence is from the middle to the two sides; firstly, installing a middle frame in the center, then installing a sliding platform and a feeding trolley, then installing middle frames on two sides, then installing corresponding sliding platforms and trolleys, and finally installing left and right side wall frames;

c. the requirement of the installation verticality of the middle frame is less than or equal to 1mm, and the gasket which does not meet the requirement is used for adjustment; the installation requirement of the sliding platform is that the transverse level is less than or equal to 1mm, the longitudinal level is less than or equal to 2mm, the relative levelness of the track is less than or equal to 0.5mm, and the adjustment which does not meet the requirement is realized by using a gasket;

d. after the middle frame and the sliding platform are aligned, a gasket is arranged between the feeder component and the steel support to ensure that the bolt fastening part cannot deform under stress; after the bolts are fastened, the feeding trolley is installed, and the flatness of a steel plate at the top of the feeding trolley is rechecked after the feeding trolley is installed in place, wherein the flatness is required to be less than or equal to 3 mm; finally, mounting a hydraulic cylinder and a hydraulic cylinder support;

4) grate mounting

a. Checking the steel structure support oblique longitudinal beam, finding out the center lines of the intermediate plate beam and the oblique longitudinal beam, and welding a center positioning block; mounting a barrier strip and a high-density high-strength heat-resistant plate on the inclined longitudinal beam, numbering the heat-resistant plates, taking out the heat-resistant plates, and mounting the fire grate frames when the fire grate frames are hoisted in place to prevent damage;

b. manufacturing five jack seats for adjusting the fire grate frame for later use, and adjusting the fire grate frame; when the grate frame is hoisted in place, the grate frame is placed on the inclined longitudinal beam at an inclination angle of 24 degrees, the frame edge is ensured to be superposed with the marked central line, and the lower end of the grate frame is jacked by a jack to prevent the grate frame from sliding downwards;

c. adjusting the distance between the top end of the grate frame and the contact surface of the steel structure, wherein four rows of grate frames are formed, firstly installing a second row of grate frame, adjusting the grate frame, and finally adjusting by using a jack to ensure that the diagonal error of the grate frame is less than or equal to 1 mm; after all the adjustment is finished, a fire grate frame fixing device is installed;

d. the third row of grate frames has the same installation and adjustment method as the second row, and after the installation and adjustment are finished, the two adjacent longitudinal walls of the second row of grate frames and the third row of grate frames are connected by bolts and the grate frame fixing devices are installed;

e. after the grate frames are installed, the adjacent middle longitudinal walls of the grate frames are clamped tightly by using clamps, a plurality of clamps are arranged at each seam, after the positions of welding seams are ensured to be free of gaps, the adjacent two rows of grate frames are welded, the welding requirement is full and firm, the upper planes of the welding seams are as high as the upper planes of the longitudinal walls, and the protruding parts are polished;

f. after the fire grate frame is completely adjusted, adjusting and connecting a fire grate driving system; the installation of a part of nose type frames of an ash hopper and a feeder of a primary air chamber can be simultaneously carried out, the connecting rod of the driving beam is ensured to be parallel to the longitudinal central line of the rocker arm during the installation, the longitudinal central line of the rocker arm is superposed with the central line of the hydraulic cylinder seat, the copper rod is used for knocking during the installation of the pin shaft, and the initial distance of the hydraulic cylinder is recorded after the adjustment is finished; the travel limit device is removed after the travel limit switch is put into use;

g. after the adjustment of the driving system is finished, a middle longitudinal frame casting begins to be installed, before the casting is installed, the width of a longitudinal wall of frame members of two grates is detected at first, the welding seam between the grates is determined to be welded, the grate frames are polished to be flat, and a tool for fastening a connecting piece is prepared; the castings need to be installed from the lower end of each row upwards in sequence, the combination of the castings and the positioning of the fixing blocks of each section need to be carried out simultaneously so as to avoid dislocation, and the fixing blocks are welded according to requirements; the top casting compresses the side casting tightly, and can not be loosened, after the installation is finished, the height difference of adjacent castings on the same plane is less than or equal to 0.5mm, the straightness is 2mm, the gap between the lap joints of the adjacent castings on the left side and the right side is 2mm, and the overall width of the castings is 200 +/-1 mm; finally, checking whether the inner space size and the straightness after the casting is installed on each row of grate frames meet the requirements and recording;

h. the left side wall and the right side wall are provided with longitudinal frame castings, the castings are sequentially arranged from the lower end of each stage to the upper end during installation, and the castings are connected with the grate frame longitudinal walls through connecting pieces; the upper castings of the left and right longitudinal frames are required to be connected with the connecting beam of the furnace shell sealing part;

i. after the middle longitudinal wall casting and the left and right longitudinal wall castings are qualified through inspection, the rear material layer adjusting device is installed, and meanwhile, the longitudinal wall castings around the rotating shaft are installed synchronously; after the installation is finished, adjusting the gaps between the rear material layer adjusting device and the middle and left and right longitudinal wall castings to reach a design value, and recording the error smaller than or equal to 2 mm;

5) grate drive system installation

a. Each row of fire grates are controlled by two rocker arms (an upper fire grate and a lower fire grate) to operate, and after the fire grate frame is installed in place, corrected and positioned, the rocker arms are corrected and installed; the rocker arm needs to be installed synchronously with the installation of a steel structure support on the platform;

b. confirming the direction of the rocker arm, the fixed end and the movable end of the bearing seat, and aligning the center position to coincide with the center of the frame during installation; calibrating the rocker arm, adjusting the position of the rocker arm by using a gasket and an adjusting bolt, and installing a connecting rod shaft; checking the center lines of the connecting rods and the rocker arms, and the parallelism of the two connecting rods in the horizontal direction; after the rocker arm is positioned, checking the moving clearance of the moving end, and performing cushion adjustment;

c. a 5T hand-operated hoist is used for pulling the rocker arm to check the running condition, and whether the center of the movable beam moves back to the position and moves back to the position to deviate relative to the center of the frame is checked, wherein the requirement is less than or equal to 0.5 mm; the stroke of the lower grate is 400mm, the stroke of the upper grate is 395mm, and a limit support is arranged;

6) grate segment mounting

a. Each row of fire grate pieces are sequentially installed from top to bottom, clean cotton cloth is used for wiping the connecting surfaces between the fire grate pieces during installation, the fire grate pieces can be completely attached, gaps at two sides are kept the same after each row of fire grate pieces are installed, and bolts are fastened; the gap between the grate plate and the side wall is adjusted by a gasket to meet the installation requirement, the fixed row gap is 3-5mm, and the movable row gap is 4-6 mm; after the qualified positioning blocks are welded, the positioning blocks are firmly adhered and welded at the position close to the central line of the furnace arrangement, and the height of a welding line is 5mm, wherein: the two positioning blocks are respectively a positioning block on the movable grate and a positioning block on the fixed grate;

b. the fire grate segments are connected and fastened through bolts, and after the adjustment of the gap between the fire grate segments and the longitudinal wall casting is finished, fastening nuts are used for spot welding according to the requirements of a drawing; the height difference of the surfaces of adjacent grate segments in each row is less than or equal to 0.5mm, the thickness of the adjusting gasket between adjacent grate segments in the same row is less than or equal to 5mm, and the total thickness of the adjusting gaskets in a single row is less than or equal to 10 mm; the clearance error between the grate segments in the same row and the side wall in the two states of the advance position and the retreat position is less than or equal to 1 mm;

7) slag shaking piece installation

After the grate segment is adjusted and fastened and positioned, the scraper device is installed; when the grate is installed, the connecting surface of the arc-shaped scraping piece is wiped by clean cotton cloth, the gap between the arc-shaped scraping piece and the longitudinal wall casting is 5mm, and the arc-shaped scraping piece and the rear sealing plate of the grate frame are tightly pressed by a asbestos rope; after the installation and adjustment are finished, double nuts of the connecting bolt are fastened to prevent loosening, and the bolt is spot-welded according to the requirements of a drawing;

8) hydraulic cylinder mounting

When the movable grate slides down to the minimum closing height, the center of the bearing seat hole and the center of the rocker arm hole meet the size requirement; the oil pipe interface on the hydraulic cylinder should be at the upper or obliquely upper position so as to facilitate the connection of the oil pipe; after the hydraulic cylinder is installed, controlling a sliding dead point of the grate by using the hydraulic cylinder, removing a positioning support welded on a pull rod, and installing an oil receiving box of the hydraulic cylinder and a support of a limiting device;

9) furnace shell installation

a. The installation sequence of all parts of the furnace shell is as follows: side wall frame mounting → rear wall frame (lower) mounting → front and rear arch frame mounting → front wall frame mounting → rear wall frame (middle) mounting → rear wall frame (upper) mounting → slag hole mounting → furnace bottom column and panel mounting → furnace shell sealing mounting;

b. installing a side wall frame: firstly, determining the positioning points of the transverse and longitudinal central lines of the side wall upright columns, taking the fire grate reference point as an installation longitudinal positioning reference, taking the inner space size of the furnace shell as the transverse positioning size of the upright columns, and marking a positioning reference line; when the stand columns are installed, the top surface elevation of the stand columns is required to be used as a reference, the top surface elevation is adjusted by increasing and decreasing adjusting gaskets on the bottom surfaces of the stand columns, and after all the stand columns are installed, the verticality of the stand columns and the integral flatness requirement of the inner surfaces of the stand columns of the side walls are checked to be less than or equal to 5 mm; welding the side wall panel after acceptance inspection is finished, wherein a reasonable welding sequence is adopted during welding;

c. rear wall frame (lower) installation: determining the positioning size in the transverse direction and the longitudinal direction, drawing the installation center line of each stand column, adjusting the top surface elevation of the stand column by adopting a gasket during installation, and checking that the verticality and the integral planeness of the inner side are less than or equal to 5 mm; after the requirements are met, a rear wall frame (lower) panel and a fire observation hole are installed, and high-temperature glass on the fire observation hole can be installed before debugging in order to prevent damage;

d. the front arch frame and the rear arch frame are installed: the beam is positioned and welded according to requirements, the beam is temporarily supported to prevent the self weight from bending when being installed, the beam is positioned according to the size of a drawing when the hanging beam is installed, and the upper ends of the front arch hanging beam and the rear arch hanging beam are respectively connected with a front wall panel and a rear wall panel;

e. installing a front wall frame: firstly, positioning a crossbeam, and arranging two lifting points during lifting to prevent the crossbeam from deforming; continuously installing the front wall panel and the rib plate after the installation of the cross beam is finished; the front wall panel is overlapped on the outer side of the side wall panel when being installed, and a space with the thickness of the panel is reserved when the cross beam is installed so as to facilitate installation; the rear wall frame (middle and upper) is consistent with the front wall frame;

f. and (3) installing a slag outlet: the slag outlet is divided into an upper section and a lower section, and the upper section and the lower section are integrally hoisted in place after ground combination is completed; firstly, connecting the upper section and the lower section of the slag outlet, then welding, and installing a rib plate after welding is firm; the slag hole is connected with the lower panel of the rear wall and the side wall panel, and the panels are fastened by a connecting piece and then are welded firmly;

g. furnace bottom upright post and panel installation: the upright post sizing block at the bottom of the furnace shell is compact, the position is correct, the welding is firm, and the connection of the sealing plate is reliable;

h. and (3) sealing and installing a furnace shell: the furnace shell seal is divided into three regions, namely, the seal of the lower part of the chute with the front arch and the side wall, the seal of the furnace shell with the connecting beam and the side wall frame, and the seal of the furnace bottom frame with the fire grate and the furnace shell, wherein the seal of each part is strictly installed according to the requirements of drawings;

10) feed hopper and chute combined installation

The installation sequence is as follows: firstly, mounting the lower part of a chute, then mounting the upper part of the chute, and finally mounting a feed hopper; the parts at the lower part of the chute are assembled and installed after being hoisted, the upper part of the chute and the feed hopper are assembled on the ground and then hoisted, and the feed hopper and the chute are hermetically welded after being assembled and adjusted, so that the odor in the garbage can is prevented from leaking;

installation of primary air chamber ash bucket and percolate bucket

a. Installation of a percolate bucket: firstly, installing the upper section of the percolate bucket, welding, performing a kerosene penetration test on a welding line after full welding to prevent percolate from leaking due to poor sealing, and then connecting the lower section of the percolate bucket; the manhole door and the door frame are sealed by asbestos ropes and are firmly connected by connecting pieces;

b. ash bucket installation:

the ash bucket is divided into four rows, wherein each row of four ash buckets are respectively an ash bucket (I), an ash bucket (II), an ash bucket (III) and an ash bucket (IV); firstly, combining on the ground, welding, and performing a kerosene penetration test on a welding seam after welding is finished;

secondly, after the grate frame is adjusted, the ash bucket is hoisted in place and welded; before the grate segment is installed, the ash bucket needs to be installed and welded so as to facilitate the hoisting and welding operation of the ash bucket;

12) installation of slag remover

Firstly, determining and scribing transverse and longitudinal datum lines of the slag remover, rechecking the elevation of a civil foundation, adjusting by using an adjusting base plate at the bottom of the slag remover if the elevation is not large, and connecting the slag remover with a slag outlet after the slag remover is adjusted horizontally;

13) hydraulic system installation and flushing

a. Installing hydraulic system pipelines: laying a pipeline, wherein a cold bending method is adopted for bending the pipe; before welding the pipe, a mechanical processing method is adopted for grooving; the pipelines and the pipe joints are welded by full argon arc welding, and an insertion type welding form cannot be adopted;

b. circularly flushing the pipeline:

firstly, adopting an off-station circulating flushing mode, performing circulating flushing by using oil, and connecting a valve platform with a field installation pipeline for partitioned serial flushing; the valve stand needs to be temporarily short-circuited before flushing, and flushing oil is strictly forbidden to enter the valve stand; the pipeline is divided into three parts for circulation flushing: the first part is a fire grate system, the second part is a feeder and sealing door system, and the third part is a slag remover and a material layer adjusting system;

secondly, heating the oil temperature in the oil tank to 40-60 ℃ by using a heater during flushing, increasing the construction oil temperature to 70 ℃ in winter, carrying out primary tapping vibration along the pipeline by using a wooden hammer, a copper hammer and a rubber hammer or using a vibrator every 3-4 h in the flushing process, and uniformly tapping around the periphery of the pipe during tapping so as not to damage the outer surface of the pipe;

flushing work is carried out immediately after the pipeline is welded, and the pipeline is blown and swept by compressed air before flushing oil is injected, so that the flushing efficiency is improved; qualified working oil is injected immediately after the pipeline is qualified by flushing, and equipment needs to be started for circulation every 3 days to prevent the pipeline from being corroded;

after the flushing loop is formed, a flushing pump source is connected to the loop at the end with the larger pipe diameter, and flushes from the main oil return pipe to the direction of the pressure oil pipe, so that sundries in the pipe can be flushed out smoothly; the flushing oil tank is clean and sealed as much as possible, an air filtering device is arranged, and the capacity of the oil tank is five times larger than the flow of the hydraulic pump; when oil is filled into the oil tank, a plate type oil filter is adopted to filter the oil;

fifthly, the oil for flushing the pipeline needs to be filtered before an oil return tank, and the filter element precision of the large-specification pipeline type oil return filter is replaced according to the oil cleaning condition in different flushing stages;

sixthly, selecting a flushing medium: the flushing medium is compatible with the working medium of the system itself, with the seal and with the lowest possible viscosity;

seventhly, the requirements of replacing the filter core in the flushing loop and flushing the sample are as follows: sampling inspection is carried out on the upstream of the return oil filter, impurities are more in the initial flushing stage, the filter element needs to be replaced at intervals of 4h, the filter element can be replaced at 8h in the subsequent stage along with the reduction of dirt, when the flushing time reaches 24h, sampling inspection can be carried out when the accuracy grade of oil is close to the requirement, and sampling is carried out once every 8 h;

14) debugging

a. Testing the single feeder in a test run: firstly, carrying out single feeder test run, controlling the speed according to 40% of the working speed, adjusting the position of a travel switch in a inching mode, and carrying out linkage test run on the feeder after the debugging and detection are qualified;

b. carrying out single-machine trial run detection on the fire grate pieces: adjusting the position of a travel switch, controlling the speed according to 40% of working speed, adjusting the position of the travel switch by inching, and performing linkage test run after debugging and detection are qualified; and finally, performing linkage trial run detection on the feeder and the grate until the detection is qualified.

2. The method for installing and constructing the reverse-push mechanical grate garbage incinerator according to claim 1, wherein: the incinerator consists of a feed hopper, a chute, a feeder, a grate, a steel structure support, a furnace shell, a primary air chamber ash hopper, a percolate hopper, a slag remover, an overhaul platform, a hydraulic system and a centralized lubricating system.

3. The method for installing and constructing the reverse-push mechanical grate garbage incinerator according to claim 1, wherein: the pipeline circulating flushing adopts a flushing pump station and N32 hydraulic oil to flush the oil pipeline, and during flushing flow, calculation is carried out according to the size of the pipeline and the form of a loop, so that oil in the pipeline is ensured to be in a turbulent flow state, and the flow velocity of the oil in the pipeline is more than or equal to 3 m/s; the flow velocity in the washing operation pipe is 2 times of the working flow velocity and is in a turbulent flow state.

4. The method for installing and constructing the reverse-push mechanical grate garbage incinerator according to claim 1, wherein: and in the step 13), when the cleanliness of the flushing liquid meets the requirement through inspection, the flushing liquid is completely ejected out by using 0.8MPa of compressed air, and working hydraulic oil is injected as soon as possible.