A kind of inner wall of stack anticorrosion high-molecular polythene layer
Technical field
This utility model relates to a kind of inner wall of stack anticorrosion high-molecular polythene layer, belongs to chimney anticorrosion technical field.
Background technology
In the industrial production, by the structures such as flue, chimney, aiutage, scrubbing tower etc. of the various waste gas of high altitude discharge,
All there is pollution and Anticorrosion Problems in great majority." fossil-fuel power plant atmospheric pollutant emission standard " (GB13223-2011) new standard is big
Width has tightened up the emission limit of nitrogen oxides, sulfur dioxide and flue dust, close to or up the requirement of developed countries and regions.
Thermal power plant in early days of China does not add desulfurizer, and chimney have employed armored concrete liner tile masonry in a large number.With
The commonly used of the domestic relevant regulation for environmental conservation and the execution of decree and wet desulfurizing process, these chimneys are carried out
Desulfurizing fly ash is the most imperative.But wet desulphurization brings chimney and flue significant corrosion problems.After desulfurization, whether install additional
Flue gas heat-exchange unit (GGH), flue-gas temperature is below acid dew-point temperature, although sulfur dioxide in flue gas, sulfur trioxide content reduce,
But these sour gas, especially sulfur trioxide will be dissolved in the water, form acid solution so that flue gas is at back-end ductwork and cigarette
Chimney inwall condenses, and for the inner wall of stack of different structure form, all has corrosion in various degree to occur.As can be seen here, thermal power plant
Chimney still can be caused heavy corrosion by flue gas after desulfurization, for ensureing the properly functioning of power plants generating electricity additional, chimney is installed anti-corrosion measure
Particularly necessary.
The anti-corrosion material of current domestic entrance chimney anticorrosion improvement project mainly has brushing class, patch block class, liner class.Brushing
Class: OM, glass flake and Sa Weizhen etc., be characterized in that cost is relatively low, and short construction period is easy to maintenance, but service life is short,
Poor durability.Patch block class: foam glass brick, acidproof brick and vitreous ceramic brick etc., be characterized in heatproof, resistance to ooze, moisture-proof, corrosion resistant
The characteristics such as erosion, aging resistance are good, and cost is general, but construction requirement is high, difficulty big, and life-time service easily comes off, for old chimney
Transform relatively difficult to achieve.Liner class: titanium plate alloy lining etc., is characterized in corrosion-resistant, heat resistance good, and major defect is construction difficulty
Degree is greatly, it is impossible to reaching whole welding requirements of alloy, life-time service there will be commissure steel plate corrosion Seepage, cost
Expensive.
Chinese patent literature CN103982079A discloses the construction method of the anti-corrosive apparatus of a kind of thermoelectricity chimney, including:
Step 1, is welded into the load bearing support ring of loop configuration;Step 2, forms the supporting frame of cylindric rack;Step 3, it is achieved hinge
Connect and cyclization, be spliced to form inner core corrosion-proof lining;Step 4, takes the fiberglass of 4-5 layer to mend to the glass epoxy place of being laterally hinged with
Strong construction, first levelling with resin flake to the vertical splicing part of glass epoxy, then on the surface of stitching portion, carry out the glass of 4-5 layer
Glass steel reinforcing construction is formed and seals.But, the service life of this anti-corrosive apparatus is short, poor durability.
Utility model content
For the deficiencies in the prior art, this utility model provides a kind of inner wall of stack anticorrosion high-molecular polythene layer.
The technical solution of the utility model is as follows:
A kind of inner wall of stack anticorrosion high-molecular polythene layer, including polylith interconnective high-molecular polythene sheet material and butterfly
Shape bolt, is provided with Embeded nut, the wing bolt described in Embeded nut connection at sheet material inner surface, and one end of wing bolt embeds
Chimney body makes high-molecular polythene sheet material be fitted on inner wall of stack formation high-molecular polythene layer.
Preferably, described high-molecular polythene sheet material with the addition of the polyphosphazene polymer of flame retardant constituent in the feed when being and produce
Ethylene plate.
Preferably, a length of 100-2000mm of described high-molecular polythene sheet material, a width of 200-4000mm, thickness is 5-
30mm。
Preferably, described wing bolt is stainless steel.The advantage of this design is, at the high score with Embeded nut
After sub-polyethylene board is produced, wing bolt is installed in Embeded nut.The specifications and models of wing bolt are according to pre-buried
Nut and the change of chimney body size and change accordingly.
Preferably, connected by " V " type mouth, in-between by " V " type between about described high-molecular polythene sheet material
Mouth connects.
It is further preferred that the A/F of described " V " type mouth is 5-20mm, the degree of depth is 1-8mm.
Preferably, described Embeded nut is inserted in high-molecular polythene sheet material when producing high-molecular polythene sheet material.This
Design is advantageous in that, Embeded nut has been fixed on high-molecular polythene sheet material when high-molecular polythene sheet material forming,
Forming integrative-structure with high-molecular polythene sheet material, the size of nut changes according to board dimension and changes.
Preferably, described " V " type mouth carries out seamless welding by with the addition of the high-molecular polythene welding rod of flame retardant constituent
It is tightly connected.
The beneficial effects of the utility model are:
1, this utility model uses high-molecular polythene plate to do chimney corrosion-proof lining, has corrosion-resistant, high temperature resistant, water absorption rate
The advantages such as low, impact resistance is strong, wear-resistant, life-span length, can resist condensed on desulfurization after funnel sulphuric acid, sulfurous acid, chimney
Internal high and low temperature environment, the washing away of dust, be suitable for the internal harsh corrosive environment of chimney, effectively solve chimney and corrode
Problem.
2, the construction method of this utility model inner wall of stack anticorrosion high-molecular polythene layer, its operation is simple, construction is easy,
Old chimney can be played reinforcement effect, can complete by synchronous construction simultaneously for newly-built chimney, the duration is short, efficiency is high.
Accompanying drawing explanation
Fig. 1 is that this utility model inner wall of stack anticorrosion high-molecular polythene sheet material applies the structural representation before heat-insulation layer.
Fig. 2 is that this utility model chimney inner wall anti-corrosive high-molecular polythene sheet material applies the structural representation after heat-insulation layer
Figure.
Fig. 3 is the connected mode schematic diagram of this utility model chimney inner wall anti-corrosive high-molecular polythene sheet material.
Fig. 4 is the general assembly schematic diagram of this utility model chimney inner wall anti-corrosive high-molecular polythene layer.
Wherein: 1, high-molecular polythene sheet material;2, Embeded nut;3, wing bolt;4, " V " type mouth seam;5, chimney is originally
Body;6, heat-insulation layer.
Detailed description of the invention
Below by embodiment and combine accompanying drawing this utility model is described further, but it is not limited to this.
Embodiment 1:
As shown in Figures 1 to 4, a kind of inner wall of stack anticorrosion high-molecular polythene layer, including interconnective polyphosphazene polymer
Ethylene plate 1 and wing bolt 3, be provided with Embeded nut 2 at sheet material inner surface, and Embeded nut 2 connects described wing bolt 3,
One end of wing bolt 3 embeds chimney body makes high-molecular polythene sheet material be fitted on inner wall of stack formation high-molecular polythene
Layer.
The a length of 100-2000mm of high-molecular polythene sheet material, a width of 200-4000mm, thickness is 5-30mm.
The material of heat-insulation layer is polyurethane, thickness 50mm-200mm.
In the present embodiment, stainless steel selected by wing bolt.At the high-molecular polythene sheet material with Embeded nut 2
After producing, wing bolt 3 is installed on Embeded nut 2.The specifications and models of wing bolt 3 are according to Embeded nut and chimney
The change of body dimension and change accordingly.
Connected by " V " type mouth 4 between high-molecular polythene sheet material about 1, connected by " V " type mouth in-between.“V”
The A/F of type mouth 4 is 5-20mm, and the degree of depth is 1-8mm.
Embeded nut 2 is inserted in high-molecular polythene sheet material when producing high-molecular polythene sheet material 1.Embeded nut is at height
Be fixed on structure formed integrally on high-molecular polythene sheet material during molecular polyethylene sheet material forming, the size of nut according to
Board dimension changes and changes.
" V " type mouth 4 is carried out without seam welding according to prior art by with the addition of the high-molecular polythene welding rod of flame retardant constituent
Connect and be tightly connected.
For the construction method of the inner wall of stack anticorrosion High molecular weight polyethylene layer in the present embodiment, with newly-built chimney body
Synchronous construction completes, and newly-built chimney body is concrete material, and Specific construction step is as follows,
(1) first heat-insulation layer is applied on high-molecular polythene sheet material 1, Embeded nut 2 is connected with wing bolt 3, group
Dressing up high-molecular polythene sheet unit, a length of 3000mm of every block of high-molecular polythene sheet material 1, a width of 1500mm, thickness is
12mm。
(2) in newly-built chimney body 5 work progress, when carrying out concreting, by the polyphosphazene polymer second in step (1)
Wing bolt 3 one end on alkene sheet unit embeds in chimney body, is consolidated with concreting, makes polyphosphazene polymer second
Alkene sheet material 1 is fitted on chimney body 5 inwall, and adjacent two pieces of high-molecular polythene sheet units combine between up and down shape
Becoming " V " type mouth 4, " V " type width suitable for reading is 10mm, and the degree of depth is 4mm;
(3) use the high-molecular polythene welding rod that with the addition of flame retardant constituent that " V " type mouth 4 is carried out seamless welding, make phase
Adjacent two pieces of high-molecular polythene sheet units are tightly connected.
When utilizing the inner wall of stack anticorrosion high-molecular polythene layer described in the present embodiment that old chimney anticorrosion layer is transformed,
Construction procedure is as follows:
(1) first heat-insulation layer 6 is applied on high-molecular polythene sheet material 1, Embeded nut 2 is connected with wing bolt 3, group
Dress up high-molecular polythene sheet unit, standby;
(2) the former liner of old chimney is removed: remove the thermal insulation layer on old inner wall of stack, vitrified tile facility, and by old chimney
Wall is cleaned out, and the hopper that the waste material removed is promoted by hoist engine is transported to chimney ground;
(3) sheet material fixed position concrete chisel removal: reinforcing of high-molecular polythene sheet unit uses pre-buried M16 bolt
Mode, reliable in order to reinforce, M16 bolt need to catch on reinforcing bar inside former chimney wall, and every piece of upper and lower 2 points of sheet unit, in advance
Anchor point by barrel concrete chisel removal and is dug out in the position installing high-molecular polythene sheet unit, spills former chimney wall steel
Muscle, installs M16 bolt, every piece of at least corresponding 4 anchor points of high-molecular polythene anticorrosion sheet unit;
(4) reinforcing bar binding: carry out the vertical muscle of bar-mat reinforcement colligation, first colligation, then colligation circumferential reinforcement according to design requirement.
By surveying setting-out and the progressively assembling reinforcement of colligation program, reinforcing bar binding " eight words " intersects, and each button is with no less than 2 22# iron wires
Colligation, should mutually stagger by design requirement joint, the bar-mat reinforcement set up follow-up pour lightweight concrete time, can make lightweight mix
Solidifying soil is more firmly more solid after solidifying;
(5) sheet unit is installed: start to install high-molecular polythene sheet unit, adjacent two pieces of high scores after reinforcing bar binding is complete
Sub-polyethylene board unit combines between up and down formation " V " type mouth seam;Pre-buried M16 bolt one end caught on and digs out
Former barrel reinforcing bar, screw thread one end, through the bolt hole on sheet unit, is placed reinforcing bar and is enclosed purlin, triangle rod standing to polyphosphazene polymer second
Alkene sheet unit is reinforced, and is tightened by M16 nut;
(6) solder joint: use and with the addition of the high-molecular polythene welding rod of flame retardant constituent to adjacent high-molecular polyethylene
" V " type mouth seam between sheet unit is welded;
(7) lightweight concrete pours: after sheet unit installation, starts to old inner wall of stack and high-molecular polythene plate
Space between material unit pours lightweight concrete;
(8) sheet unit girth member is removed: lightweight concrete poured after reaching initial set (lightweight concrete intensity >=
3MPa), carry out the dismounting of sheet unit girth member, back out M16 nut, pull down triangle rod standing, reinforcing bar encloses purlin, with angular machine/
The pre-embedded bolt part exposed is cut away by pressure clamp, the facet plate of material identical with high-molecular polythene sheet unit
Welding closure;
(9) repeat construction according to above-mentioned steps (1)-(8), until construction is to top, be finally completed changing of old chimney anticorrosion layer
Make.