Compilation:
Review:
Approval: February 13th, 26
Contents
Chapter I
Overview
Chapter II Regulations, Specifications and Standards Required for this Project
Chapter III Labor Plan, Construction Machine Plan and Construction Site. Construction progress plan
chapter iv boiler foundation acceptance and marking
chapter v steel frame combined hoisting
chapter vi air preheater installation
chapter vii water wall installation
chapter viii economizer installation
chapter ix superheater installation
chapter x drum installation
chapter xi separator installation. Installation of flue gas duct
chapter XIII boiler water pressure test
chapter XIV quality assurance measures
chapter XV measures for safe production and civilized construction
chapter I summarizes that the installation project of a chemical industry group limited liability company's 75t/h circulating fluidized bed boiler is located in the factory area of the group, and the scope of the project includes the installation, single-machine commissioning and debugging of machines, electricity and instruments within the battery limit of the 75t boiler. Section 1 Main Parameters and Basic Dimensions of Boiler Model ZG-75/3.82-m Rated Evaporation 75t/ H Rated steam pressure 3.82Mpa Rated steam temperature 45℃ Feed water temperature 15℃ Primary air outlet temperature 128.4℃ Secondary air outlet temperature 142.1℃ Exhaust smoke temperature 128.7℃ Applicable fuel bituminous coal thermal efficiency 88.9% Cold air temperature 3℃ Hydrostatic test pressure 5.35Mpa Fuel granularity -1 ㎜ Limestone granularity requirements < 1 ㎜. Shape and size: width (including platform) 1118 ㎜ depth (including platform) 163 ㎜ Drum centerline elevation 319 ㎜ Body highest point elevation 34346.5 ㎜ The boiler structure in Section II adopts ZG-75/3.82-M circulating fluidized bed boiler produced by Zhengzhou Boiler Co., Ltd., and single drum natural circulating water tube boiler, with all-welded metal structure. The boiler adopts a circulating combustion system consisting of a furnace, a cyclone separator and a feeder. Dynamic lighting under the bed. Two igniters are arranged at the rear side of the air chamber. The ignition oil is # light diesel oil, and coal and limestone are fed by three screw coal feeders located in front of the second furnace. Membrane wall structure of boiler furnace, in which a water-cooled air distribution plate is arranged on the water wall of the air chamber at the lower part, and air caps are uniformly arranged on the air distribution plate, and the air caps adopt bell-jar type air caps with unique design to form a fluidized bed, which is also a membrane wall structure; Annular water cooling jackets are arranged at the cyclone separator return feeder, each of which constitutes a water circulation system independently. The boiler uses a single main pipe for water supply. The steam drum is supported on the steel frame through two drums, and there are several downcomers below it. An unheated recirculation pipe is installed between the drums and the economizer. Two cyclone separators with fender structure are arranged in parallel in the middle of the boiler, lined with fire-resistant and wear-resistant materials, and there is a feeder at the lower part for material return. The smoke and dust generated by the combustion in the furnace enters the two cyclone separators in two tangential directions through the two upper windows of the rear water wall. The particles in the smoke and dust are captured by the cyclone separators, unscrewed and returned to the furnace for re-combustion. The smoke and dust leaving the cyclone separators enter the tail flue of the tail shaft through the central tube and the outlet flue, and leave the boiler through the superheater, economizer and air preheater from top to bottom. A superheater, an economizer and an air preheater are arranged in the tail shaft of this boiler from top to bottom according to the flow direction of flue gas. Boiler superheaters are divided into high and low temperature superheaters, and the superheaters are arranged in the inclined flue behind the cyclone separator. Low-temperature superheater adopts mixed-flow arrangement, which is divided into two parts, and high-temperature superheater adopts downstream arrangement. The temperature of superheated steam is adjusted by spraying water to reduce the temperature, and the desuperheater is placed between two superheaters. The economizer is a serpentine tube, which is arranged in three stages. There are two groups of high-temperature economizer and one group of low-temperature economizer. The serpentine tube bundle is supported on the hollow beam by the bracket, and the feed water flows reversely with the flue gas along the serpentine tube from bottom to top. The air preheater is tubular and arranged in two stages. The upper stage is the secondary air preheater, and the lower stage is the primary air preheater. The flue gas is washed laterally outside the pipe, and the primary air passes through one stroke and the secondary air passes through two strokes. Attached is the steam-water flow chart 3. Feed water is low in inlet, high in inlet and high in outlet. Coal economizer is mixed with header. Coal economizer is outlet header. Coal economizer is outlet header. Desuperheater before steam bag and desuperheater after steam bag. Section 3: Preparation before construction. 3.1 Under the guidance of quality assurance plan, technical and engineering management personnel are in place on time and make good preparations for manpower and material resources. 3.2 Organize construction personnel to learn boiler drawings and relevant technical regulations, and make technical safety disclosure. 3.3 Equipment, tools, appliances, construction materials and means materials will be organized as planned. 3.4 Level the site and roads, and prepare for the combination of boiler body. 3.5 Prepare all kinds of forms for the management table cards and construction records of boiler equipment. 3.6 The equipment shall be unloaded and placed in the sequence of combined hoisting to prevent deformation. 3.7 Review and inspect the boiler foundation and equipment parts. Section IV Boiler Installation Procedure The boiler installation adopts the truck crane as the main hoisting equipment. Within the performance range of the truck crane, all components that can be combined on the ground should be integrated as far as possible and hoisted as a whole to minimize aerial work. 4.1 Boiler construction sequence: foundation grinding, shim configuration → steel frame combination → bent frame hoisting (four bent frames) → air preheater → steam drum → right water wall → rear water wall → front water wall → left water wall → air chamber water wall → coal economizer → superheater → body piping → wind pressure and water pressure test → lining masonry, heat preservation → cold adjustment → drying and boiling furnace → blowing. The cyclone separator can be installed in the tail shaft synchronously after the steel frame is aligned and welded. 4. 2 Construction sequence of boiler auxiliary equipment: acceptance and setting-out of auxiliary equipment foundation → on-site inspection and cleaning of equipment → installation of auxiliary equipment → installation of air ducts and pipes, pressure test and insulation → trial operation → having oven-drying conditions. During the construction arrangement, the deaerator and feed water pump shall be installed first, and then the primary fan, secondary fan and induced draft fan shall be installed. Boiler frame: According to the structural characteristics, the columns are assembled into four bent frames and hoisted as a whole. Drum: when the steel frame is aligned and welded, the water wall is hung in place and then hoisted in place. Furnace heating surface: front, back and side water cooling walls are combined on the ground. Hoist in the order of right, rear, front, left water wall and air chamber water wall. In the middle of the boiler, firstly, the steel frame of the return feeder, the water cooling jacket of the return leg, the lower cone (the water cooling jacket of the return leg and the lower cone are hoisted together), the upper cone and the top guard plate of the cyclone separator are installed in layers from bottom to top, and the expansion joint at the entrance of the cyclone drum is installed in advance. After the equipment installation, alignment and welding are completed, the construction of wear-resistant materials inside the cyclone drum is carried out. The construction principle of the tail shaft is from bottom to top, the flue guard plate and the wear-resisting and heat-insulating work in the furnace are carried out simultaneously, and the air preheater, low-temperature economizer, high-temperature economizer and superheater are installed in turn. Synchronous operation of primary and secondary air ducts and feeders. At the assembly position of bent frame and water wall, fully reserve the position of truck crane, and make full use of the site in boiler assembly to make the hoisting of large pieces uninterrupted. Chapter II: Rules, specifications, Standard Provisional Regulations on Installation Supervision of Boilers and Pressure Vessels and Implementation Rules (the State Council) Regulations on Safety and Technical Supervision of Steam Boilers Regulations on Safety Supervision of Pressure Vessels No.276 issued by the Ministry of Labor, No.154 issued by the Bureau of Quality and Technical Supervision No.154 issued by the Ministry of Quality and Technical Supervision DL 438-91 Typical Outline of Quality Supervision and Inspection of Key Projects of Thermal Power Transmission and Power Transmission Project Quality (1995) No.94 Guide to Boiler Boiling in Thermal Power Plants SD 135-86 Management Rules for Welder Examination of Boiler, Pressure Vessel and Pressure Pipeline (No.19 [22] of China Quality Inspection Pot) DL/ T679-99 Guide to Chemical Supervision of Thermal Equipment in Electric Power Capital Construction SDJJS3-88 Electric Power Construction and Construction T547—95 Technical Specification for Construction and Acceptance of Electric Power Construction (Piping) DL531—94 Technical Specification for Construction and Acceptance of Electric Power Construction (Welding) DL57—92 Technical Specification for Construction and Acceptance of Electric Power Construction (Chemistry) DLJ5—81 Technical Specification for Construction and Acceptance of Electric Power Construction (Radiographic Inspection of Butt Welds of Steel Pressure-Bearing Pipes) DL T569—96 Technical Code for Construction and Acceptance of Electric Power Construction (Ultrasonic Inspection of Pipeline Welds) DL/ T548-95 Technical Specification for Construction and Acceptance of Electric Power Construction (Thermal Instruments and Control Devices) SDJ 279-9 Code for Start-up and Completion Acceptance of Basic Construction Projects of Thermal Power Plants, Electric Power Industry Technical Regulations (Trial) No.159 (8) No.26 Standard for Inspection and Evaluation of Thermal Power Construction (Boiler) Piping (1983 Edition) (Thermal Instruments and Control Devices) 1998 Edition (Water Treatment and Hydrogen Production Devices) 1983 Edition 6 (Adjustment and Trial Operation) 1986 Edition (Electrical) 1983 Edition Regulations for Start-up and Commissioning of Thermal Power Engineering (1996) No.4 Chapter 3: Labor Plan, Construction Machine Plan and Construction Site Plan. Construction progress plan 3.1 Labor force plan (see the table below) List of construction personnel planNo. Job title Number 1 Management personnel 1 2 Plumbers 2 3 fitters 6 4 welders 2 5 welders 6 6 riggers 6 7 electricians 4 8 flaw detectors 3 9 scaffolders 4 1 ordinary workers 3 11 hoisters 4 12 drivers 3 13 Total 1 16 Construction Organization Table Job Title Name Remarks Project Manager Assistant Engineer Project Assistant Manager Assistant Engineer Project Assistant Manager Assistant Engineer Technical Director Assistant Engineer Quality Inspection Engineer Assistant Engineer Safety Director Assistant Engineer Material Director Technician Financial Director Accountant Information Officer Assistant Statistician 7 3.2 Construction Machine Plan Main Construction Machine Arrangement Serial Number Machinery or Equipment name, model, specification and quantity remarks 1 car crane QY12 1 set 2 car crane QY25 1 set 3 truck 1t 1 set 4 truck 5t 1 set 5 tool truck 1.5t 1 set 6 electric hoist 5t 2 sets slow 7 inverter welding machine ZX-315 14 sets 8 AC welding machine BX3-5 6 sets 9. DC welding machine AX3-5 15 sets of 1 lathes C63 1 set of 11 shaper B665 1 set of 12 drilling machine Z535 1 set of 13 shearing machine 6.3×2 1 set of 14 bending machine 6×2 1 set of 15 air compressor VF-617 1 set of 16 far infrared covered electrode drying box 5℃ 1 set of 17. Covered electrode incubator 3℃ 1 18 hydraulic bending press YW-6D 2 19 electric beveling machine φ 35 1 2 electric pressure testing pump YSD-25MPa 2 21 X-ray flaw detector XXQ255 1 22 ultrasonic flaw detector LA-1 1 1 25 hardness tester HLN-11A 1 26 heat treatment automatic thermostat D. JK-3A, 1 set of 27 theodolite, 2 sets of 8 3.3 construction site plan (omitted) 9 Chapter IV Acceptance and marking of boiler foundation Section 1: In order to ensure the installation quality of boiler, the contents of comprehensive inspection of boiler foundation before installation are as follows: 1. Appearance inspection of foundation. Observe whether there are beehives, dog holes, pits, cracks, surface peeling and exposed steel bars in the concrete. If the above defects occur, they should be treated until they are qualified. 2. Tensile strength test of foundation concrete. Check whether the strength test report meets the relevant codes and standards. If there is any doubt, the rebound instrument shall be used for on-site strength testing, and the quality meets the design and acceptance standards. 3. Find out the standard elevation points of boiler foundation for recheck, and test the elevation of each column foundation to see if it exceeds the standard. If qualified, draw 1m elevation lines on each column foundation. 4. Find out the longitudinal centerline and transverse centerline of boiler foundation and recheck the centerline of each column foundation: whether there is deviation or not, and whether the deviation meets the standard. The allowable deviation of boiler and its auxiliary equipment foundation is shown in the following table: allowable deviation of serial number item (mm) 1 coordinate position of foundation (vertical and horizontal axis) 2 2 elevation of different surfaces of foundation (including embedded steel plates on the foundation surface of columns) + -2 3 plane shape size on the convex surface of foundation+2++2- plane size on the foundation. Pingdu total length is 1 elevation (top) +2 - 5 reserved anchor bolt center distance (measured at top and root) 21. Center position 1 2. Hole depth +2 - 6 reserved anchor bolt hole 3. Verticality of hole wall (per meter) 1 Chapter 5 Combined hoisting of boiler steel frame This boiler steel frame is composed of eight steel columns, connecting beams between columns and cable-stayed braces. The steel columns are delivered in sections, and the total steel frame is total. During installation, the steel columns are combined into four bent frames on the ground. Then, firstly, lift the bent frames Z 1 and Z 2, and after alignment, connect the right cross beam between Z 1 column and Z 2 column. Hoist the bent frames Z 3 Z 4 and Z 3Z 4, and after alignment, install the beams and supports between Z3 and Z 4. (1) Set-up bent frame of combined frame shall be welded on combined frame. When the combined frame is erected on the ground, the spacing between piers shall be determined first, and the diagonal method shall be used to check whether the positions of all piers are correct, and the upper surfaces of piers shall be in the same plane, so that the positions of piers shall avoid the joints of steel frames and the positions of brackets. (2) Docking of steel columns (1) Put the segmented columns on the platform, and check the bending and distortion of each section. If there is out of tolerance, technical measures should be taken to adjust them. (2) the welding groove should comply with the regulations, the groove must be perpendicular to the center of the column, and the paint or rust on the column should be removed within 15mm from the groove. ③ Review the total length of the column before welding, and accurately calculate the influence of welding seam shrinkage on the column. 11 Z1 Z4 Z2 Z3 Z1 Z4 Z2 Z3 45 52 3 Foundation Layout Figure 6