CN1827985A - Boiler chimney body and method for forming its inner wall protection structure - Google Patents
Boiler chimney body and method for forming its inner wall protection structure Download PDFInfo
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- CN1827985A CN1827985A CN 200610066486 CN200610066486A CN1827985A CN 1827985 A CN1827985 A CN 1827985A CN 200610066486 CN200610066486 CN 200610066486 CN 200610066486 A CN200610066486 A CN 200610066486A CN 1827985 A CN1827985 A CN 1827985A
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Abstract
The invention relates to a boiler chimney and the method for forming inner-wall protective element. The inventive boiler comprises an outer frame and a liner. Wherein, said liner has a inner-wall protective, which is formed by a polymer silicate solidify layer, a epoxy paint solidify layer while said two layers can be resistant to acid and high temperature, and a strength layer; the polymer silicate solidify layer is fixed on the inner surface of liner; the epoxy paint solidify layer is fixed on the polymer silicate solidify layer; the strength layer is glass fiber grid cloth, which is extended and embedded into the polymer silicate solidify layer, or individually embedded into the polymer silicate solidify layer and the epoxy paint solidify layer to form the inner-wall protective element. Said invention has lower cost, the high temperature resistance, antisepsis property and the anti-leakage property.
Description
Technical field
The present invention relates to a kind of chimney body and form the method for its inner wall protection structure, be particularly suitable as the boiler chimney of steam power station.
Background technology
The boiler chimney body (described chimney body is meant the above barrel of chimney raft) of conventional steam power station comprises shell body and the lining that is fixed in the shell body, shell body is made by the reinforced concrete concrete usually, and on the short transverse of inwall, one circle supports step from lining to projecting inward being used to is set every a segment distance, the lining of chimney body generally is to adopt heat-barrier materials such as light ceramic, alumina cement, light-weight brick sand to form through the formwork cast, also has plenty of the light-weight brick of employing or clay matter common brick and is built into.Also be provided with between the non-step part of shell body and the lining and be used to carry out cross-ventilated space.Generally temperature be flue gas about 150 ℃ by under the situation of chimney, these linings all can satisfy the requirement of operating mode, anticorrosion are required not high, can reach more than 10 years application life.But along with the raising of national requirements for environmental protection, the steam power station has been proposed flue gas must desulfurization (SO
2), denitration (NO
X) requirement.At present, the domestic multiple wet desulphurization technology such as CaO method, MgO method, ammonia process, seawater method that generally adopt reach the purpose of flue gas desulfurization, denitration.This desulfur technology is to contain SO
2, NO
XCome in contact collision etc. alkaline aqueous solutions such as multiple complicated sour gas and CaO, MgO, ammoniacal liquor, behind chemical reaction, generate CaSO
4(gypsum), MgSO
4, (NH
4)
2SO
4Salts such as (chemical fertilizer).Flue gas can only and contain a large amount of acid water steam about 40 ℃ through temperature behind the chemical reaction.If with such low temperature sour gas directly by smoke stack emission, cause serious sour corrosion can for the lining of chimney, at first vast and be the lining of chimney bottom, cause lining to peel off or collapse, and then progressively leak into the cement concrete shell body of chimney, in the course of time, acid water or acid water steam slowly corrode the cement concrete shell body of chimney, the bed rearrangement chimney will be fallen down, and this is a very fearful problem.In order to solve this difficult problem, do not make one act of fearful generation, heating is more all extensively adopted in countries in the world, to improve the temperature of clean flue gas, its operating principle is: a heat interchanger (hereinafter to be referred as GGH) is installed in the flue before desulfurization, clean flue gas after desulfurization heats by GGH again, realizes improving the purpose of discharging flue-gas temperature.The acid water corrosion that lining forms after by acid gas or dewfall that can remove smoke of this method, but many troubles brought to desulfurizer, and total cost also will improve thereupon greatly.At first, a GGH is set, its equipment complex cost accounts for 8～10% of total cost, equipment total cost as the desulfurizer of 2 300MW units is 1.8 hundred million yuan, GGH then needs about 1,800 ten thousand yuan, secondly, owing to increased the resistance of flue gas, make exhaust blower, air-introduced machine power improve 15～20%, the integrated operation cost will increase by 8～10%.Then, because the heat pipe surface among this GGH both had been subjected to the test of high-temperature flue gas, be subjected to sour gas in the pipe again and acid reveal the corrosion of dripping, make it to form inside and outside impaired, add washing away of soot dust granule, it or not worn out heat pipe, block the passage between the heat pipe exactly, it is not smooth to make it the flue gas circulation, causes the boiler pressure fluctuation, operation operation difficulty goes out degradation disastrous effect under the rate.In addition, this GGH maintenance is difficulty especially, consuming time, consumption worker.A series of problem has been brought hidden danger to power plant's generating and desulfurizer safety long-term operation, also forces a lot of power plant can only take out start-stop to stop to desulfurizer, though this has human factor, main is apparatus factor.For this reason, have only and remove this device of GGH, could fundamentally solve this restriction thermal power plant to the generating equipment fluctuation of service, go out the rate deficiency, can not mate the international difficult problem of operation to desulfurizer.
Summary of the invention
The purpose of this invention is to provide and a kind ofly have the boiler chimney body of high temperature resistant, anticorrosion, antiseep and provide that a kind of cost is low, the simple method that forms the inner wall protection structure of this boiler chimney body of construction.
Realize that the technical scheme that a kind of chimney body is provided in the object of the invention is: this boiler chimney body comprises the shell body and the lining of tubular, and lining is arranged on the inwall of shell body, and fixedlys connected with shell body; Lining also has inner wall protection structure; it is fixed all-in-one-piece resistance to acid attack; resistant to elevated temperatures polymerization silicate cured layer; the composite construction of resistant to elevated temperatures epoxy coating cured layer of resistance to acid attack and enhancement Layer; the polymerization silicate cured layer is cemented on the lining inner surface; the epoxy coating cured layer is cemented on the polymerization silicate cured layer; enhancement Layer is a fiberglass gridding cloth; the enhancement Layer shop is buried and is cemented in the polymerization silicate cured layer; and the sum of enhancement Layer is at least one deck; perhaps enhancement Layer is spread respectively and is buried and be cemented in polymerization silicate cured layer and the epoxy coating cured layer, and the sum of enhancement Layer has at least two-layer.
Above-mentioned boiler chimney body, used raw material and the consumption of polymerization silicate cured layer that forms its inner wall protection structure is: silicate colloid 100 weight portions, corrosion resistant powder or pellet 40～60 weight portions and curing setting accelerator 0～20 weight portion; Used raw material and the consumption of epoxy coating cured layer that forms its inner wall protection structure is: heat resistant type epoxy resin 100 weight portions, reactive diluent 20～40 weight portions, amine curing agent 50～70 weight portions and mineral filler 10～30 weight portions.
Above-mentioned boiler chimney body forms silicate colloid in the used raw material of the polymerization silicate cured layer of its inner wall protection structure and is a kind or 2 kinds in Ludox, the water glass; Corrosion resistant powder is a kind, 2 kinds or 3 kinds in diabase flour, calcining quartz powder, the glass-cermic powder, or corrosion resistant pellet is a kind, 2 kinds or 3 kinds in diabase particle, calcining quartz particle, the cast stone particle; Solidifying setting accelerator is prodan or ammonium fluoride; Heat resistant type epoxy resin is the heat resistant type novolac epoxy resin; Reactive diluent is epoxy propane butyl ether, expoxy propane butyl glycidyl ether, expoxy propane amyl ether, expoxy propane phenyl ether, expoxy propane isobutylphenyl ether, phenyl glycidyl ether or amyl group glycidol ether; Amine curing agent is aliphatic amine, alicyclic amine curing compound, aromatic amine or modified amine curing agent; Mineral filler is diabase flour or glass-cermic powder.
Above-mentioned boiler chimney body; the enhancement Layer shop that forms its inner wall protection structure is buried and is cemented in the polymerization silicate cured layer; and enhancement Layer has 1 to 3 layer in the polymerization silicate cured layer; and the gross thickness that contains the polymerization silicate cured layer of enhancement Layer is 3～50mm, and the thickness of epoxy coating cured layer is 0.2～10mm.
Above-mentioned boiler chimney body; the enhancement Layer that forms its inner wall protection structure is spread respectively and is buried and be cemented in polymerization silicate cured layer and the epoxy coating cured layer; and enhancement Layer has 1 to 3 layer in the polymerization silicate cured layer; and the gross thickness that contains the polymerization silicate cured layer of enhancement Layer is 3～50mm; enhancement Layer has 1 to 2 layer in the epoxy coating cured layer, and the gross thickness that contains the epoxy coating cured layer of enhancement Layer is 1.2～30mm.
Above-mentioned boiler chimney body, the gross thickness that forms the polymerization silicate cured layer that enhancement Layer is arranged of inner wall protection structure are 3 to 10mm better, and the gross thickness that the epoxy coating cured layer of enhancement Layer is arranged is 3 to 8mm better.
A kind of technical scheme that realizes the method that a kind of inner wall protection structure that forms boiler chimney body is provided among the present invention is: it is characterized in that of method that forms the inner wall protection structure of above-mentioned boiler chimney body: enhancement Layer is only spread and is buried and be cemented in the polymerization silicate cured layer; Concrete steps are: 1. will form the raw materials used silicate colloid of polymerization silicate cured layer, be heated to 80～100 ℃ under stirring, make its hydrolysis, polymerization,, material viscosity is coated with-4 glasss when reaching 30～50 seconds the time, add corrosion resistant powder or pellet and solidify setting accelerator, mix and make paste polymerization silicate mixed material; 2. the paste polymerization silicate mixed material that 1. makes with step, inner surface at the chimney body lining applies one deck, its thickness is at least 2mm, spread the fiberglass gridding cloth of one deck then as enhancement Layer, floating with paste polymerization silicate mixed material, make under the normal temperature coating polymerization silicate mixed material surface drying (described surface drying be meant the regulation drying condition under, after going up ballotini on the surface of coating, can with brush brush gently from, and don't the state of damage film coated surface), according to the number of plies requirement that enhancement Layer is set in the polymerization silicate cured layer, this step is carried out once at least; 3. placed at least 24 hours at normal temperatures, solidify fully, form the polymerization silicate cured layer that contains enhancement Layer that reaches specific thickness 3～50mm up to coated polymerization silicate mixed material; The various raw materials that 4. will form the epoxy coating cured layer mix and obtain liquid coating, and this liquid coating is coated in the surface of polymerization silicate cured layer, and its thickness is at least 0.2mm; 5. normal temperature is placed down, solidifies fully up to coating, forms the epoxy coating cured layer that is consolidated with the polymerization silicate cured layer that reaches specific thickness 0.2～10mm, and the final inner wall protection structure that is fixed on the boiler chimney body lining that forms.
In the method for above-mentioned formation boiler chimney body inner wall protection structure, when applying paste polymerization silicate mixed material, adopt the method for spraying or blade coating; When applying liquid coating, adopt the method for spraying, brushing, roller coating or blade coating; Wherein normal temperature is meant environment temperature.
The another kind of technical scheme that realizes the method that a kind of inner wall protection structure that forms boiler chimney body is provided among the present invention is: the method that forms the inner wall protection structure of above-mentioned boiler chimney body is characterized in that: enhancement Layer is spread respectively and is buried and be cemented in polymerization silicate cured layer and the epoxy coating cured layer; Concrete steps are: 1. will form the raw materials used silicate colloid of polymerization silicate cured layer, be heated to 80～100 ℃ under stirring, make its hydrolysis, polymerization,, material viscosity is coated with-4 glasss when reaching 30～50 seconds the time, add corrosion resistant powder or pellet and solidify setting accelerator, mix and make paste polymerization silicate mixed material; 2. the paste polymerization silicate mixed material that 1. makes with step, inner surface at the chimney body lining applies one deck, its thickness is at least 2mm, spread the fiberglass gridding cloth of one deck then as enhancement Layer, floating with paste polymerization silicate mixed material, make coated polymerization silicate mixed material surface drying under the normal temperature; According to the number of plies requirement that enhancement Layer is set in the polymerization silicate cured layer, this step is carried out once at least; 3. placed at least 24 hours at normal temperatures, solidify fully, form the polymerization silicate cured layer that contains enhancement Layer that reaches specific thickness 3～50mm up to coated polymerization silicate mixed material; The various raw materials that 4. will form the epoxy coating cured layer mix and obtain liquid coating, and this liquid coating is coated in the surface of polymerization silicate cured layer, and its thickness is at least 0.2mm; Spread the fiberglass gridding cloth of one deck as enhancement Layer then, apply liquid coating again and cover enhancement Layer on this enhancement Layer, normal temperature is placed into liquid coating layer surface drying; According to the number of plies requirement that enhancement Layer is set in the epoxy coating cured layer, this step is carried out once at least; 5. normal temperature is placed, and solidify to form the epoxy coating cured layer that contains enhancement Layer that reaches specific thickness 1.2～30mm fully up to dope layer, and the final inner wall protection structure that is fixed on the boiler chimney body lining that forms.
In the method for above-mentioned formation boiler chimney body inner wall protection structure, when applying paste polymerization silicate mixed material, adopt the method for spraying or blade coating; When applying liquid coating, adopt the method for spraying, brushing, roller coating or blade coating; Wherein normal temperature is meant environment temperature.
Good effect of the present invention is: each layer collocation of the formation chimney body inner wall protection structure that (1) technical solution of the present invention is determined rationally can stand sour gas and the acid anti-150 ℃ of high temperature and non-leakage of burn into that drip that reveal below 40 ℃.Because the polymerization silicate cured layer is to be raw material with the silicate colloid, the liquid polymerization silicate that forms through hydrolysis, polymerization is as adhesive, similar to the material of existing chimney body inner surface, and as inorganic polymer polymerization silicate with silicate skeleton, more increased the affinity with the chimney body inner surface, in conjunction with more firm; Be solidificated in the epoxy coating cured layer on the polymerization silicate cured layer, made full use of epoxy resin and formed high temperature resistant, the anticorrosive property that the back of filming is had; The fiberglass gridding cloth as enhancement Layer in polymerization silicate cured layer and/or the epoxy coating cured layer is buried and be cemented in the shop; itself have high temperature resistant; decay resistance; long-term shop is embedded in the layer can not damaged; and its fenestral fabric not only makes the firmness of polymerization silicate cured layer and/or epoxy coating cured layer itself improve; do not ftracture; also be more conducive to improve the adhesion of each interlayer; interlayer can not peeled off; forming combines firm with the liner surface of chimney body; good integrity; non-leakage chimney body inner wall protection structure, thus it is high temperature resistant that chimney body is had; anticorrosion; the performance of antiseep.Because chimney body has adopted the inner wall protection structure of technique scheme, when flue gas desulfur device normally moves, be lower than clean acidic flue gas and acid revealing when dripping of 40 ℃ after the desulfurization by chimney, contact with the epoxy coating cured layer with corrosion resistance of inner wall protection structure based on epoxy resin, can not cause damage to chimney body, acid dew drips and is difficult for adhering to the epoxy coating cured layer, also is difficult for the inside of infiltration inner wall protection structure; Even if desulfurizer abnormal running and make the sulfur content in the flue gas higher; when the high-temperature flue gas of this moment passes through chimney; the epoxy coating cured layer based on epoxy resin with heat resistance of chimney body inner wall protection structure also can adapt to, can deliquescing, damage.With the firm polymerization silicate cured layer of chimney body bonding and the existence of enhancement Layer; make the chimney body inner wall protection structure remain a firm integral body for a long time; therefore; avoided adopting and had the danger that the chimney lining can cause chimney to collapse because of uneasy assembling heat exchanger GGH; solved because of the corresponding increase of equipment cost, installation cost and maintenance cost that GGH brought is installed; and make a series of problems such as desulphurization system and steam generator system running at full capacity for a long time, and the gas that discharged of coal-burning boiler chimney also can meet the environmental requirement of national regulation.(2) method of formation chimney body inner wall protection structure of the present invention is easy, cost is low, compliance is strong.Because forming the job practices of each layer of chimney body inner wall protection structure operates easily, new, old chimney body inner surface all is suitable for, be coated in the polymerization silicate cured layer on the old inner wall of stack, also can seal impaired chimney body inner surface, prevent that chimney body from further damaging; Raw materials used low price, be easy to get.Realized simple method with the present invention, form with lower cost have high temperature resistant, anticorrosion, the purpose of the chimney body of leakage performance, fundamentally solved restriction thermal power generation plant fluctuation of service, gone out the rate deficiency, can not mate the difficult problem of operation to desulfurizer.
Description of drawings
Fig. 1 is a kind of structural representation of chimney body of the present invention;
Fig. 2 is the another kind of structural representation of chimney body of the present invention.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples, but be not limited to this.
In following examples, chimney body inner wall protection structure and forming method thereof is described.Raw materials used, unless otherwise indicated, be commercially available industrial goods.
(embodiment 1, be used for the new chimney body of power plant boiler)
As shown in Figure 1, chimney body comprises the shell body 4 and the lining 5 of tubular, and lining 5 is arranged on the inwall of shell body 4, and fixedlys connected with shell body, also has air flow passage 6 between shell body 4 and lining 5; Also has inner wall protection structure; described inner wall protection structure is fixed all-in-one-piece resistance to acid attack, resistant to elevated temperatures polymerization silicate cured layer 1; the composite construction of resistance to acid attack, resistant to elevated temperatures epoxy coating cured layer 2 and enhancement Layer 3; polymerization silicate cured layer 1 is cemented on lining 5 inner surfaces; epoxy coating cured layer 2 is cemented on the polymerization silicate cured layer 1; enhancement Layer 3 is fiberglass gridding cloths; enhancement Layer 3 shop is buried and is cemented in the polymerization silicate cured layer 1, and enhancement Layer 3 add up to one deck.
The concrete steps of method that form the inner wall protection structure of chimney body are: take by weighing by the prescription of table 1 1. that to form polymerization silicate cured layer 1 raw materials used, in the retort that agitator and heater are housed, add Ludox, be heated to 100 ℃ under stirring, make its hydrolysis, polymerization, the assaying reaction material viscosity reaches in viscosity and to be coated with-4 glasss 30 seconds the time, stir corrosion resistant powder of adding and curing setting accelerator down, mix and make paste polymerization silicate mixed material; 2. the paste polymerization silicate mixed material that 1. makes with step, on the lining 5 of chimney body inner surface, spray one deck with spray gun, its thickness is 2mm, laying a layer thickness then is the fiberglass gridding cloth as enhancement Layer 3 of 1mm, floating with paste polymerization silicate mixed material, normal temperature makes coated paste polymerization silicate mixed material surface drying; 3. placed at least 24 hours at normal temperatures, solidify fully up to coated polymerization silicate mixed material, forming thickness is the polymerization silicate cured layer 1 that contains enhancement Layer 3 of 3mm; 4. take by weighing the various raw materials that form epoxy coating cured layer 2 by the prescription of table 1 and mix and obtain liquid coating, this liquid coating is sprayed on the surface of polymerization silicate cured layer 1 with spray gun, its thickness is 0.2mm; 5. normal temperature is placed down; solidify fully up to dope layer; the epoxy coating cured layer 2 that is consolidated with polymerization silicate cured layer 1 that forms thickness and be 0.2mm, and final to form the thickness that is fixed on the chimney body on chimney body lining 5 inner surfaces be the inner wall protection structure of 3.2mm.
Normal temperature in the above-mentioned steps is meant the state (following examples are identical) when environment temperature is 5 ℃ to 40 ℃.
(embodiment 2, be used for the new chimney body of power plant boiler)
Basic identical among the shell body 4 of chimney body, lining 5, air flow passage 6 and inner wall protection structure and the embodiment 1, difference is: the enhancement Layer 3 in the polymerization silicate cured layer 1 of inner wall protection structure has two-layer.
Form basic identical among concrete steps and the embodiment 1 of method of inner wall protection structure of chimney body, difference is: the heating-up temperature when step stirs in 1. is 80 ℃ and reaches in viscosity and to be coated with-4 glasss and to add corrosion resistant powder and curing setting accelerator 50 seconds the time.2. step need carry out twice, promptly lay make coated paste polymerization silicate mixed material surface drying under first floor fiberglass gridding cloth 3,, the normal temperature floating with paste polymerization silicate mixed material after, spray the thick paste polymerization silicate mixed material of one deck 3mm again, and then lay second layer fiberglass gridding cloth 3, make coated paste polymerization silicate mixed material surface drying under, the normal temperature floating with paste polymerization silicate mixed material.The thickness of last resulting inner wall protection structure is 7.2mm, and wherein, the thickness that contains the polymerization silicate cured layer 1 of enhancement Layer 3 is 7mm, and the thickness that contains the epoxy coating cured layer 2 of enhancement Layer 3 is 0.2mm.
(embodiment 3, be used for the old chimney of factory's coal-burning boiler)
Basic identical among the shell body 4 of chimney body, lining 5, air flow passage 6 and inner wall protection structure and the embodiment 2, difference is: the enhancement Layer 3 in the polymerization silicate cured layer 1 of inner wall protection structure has three layers.
Form basic identical among concrete steps and the embodiment 2 of method of inner wall protection structure of chimney body, difference is: the heating-up temperature when step stirs in 1. is 100 ℃ and reaches in viscosity and to be coated with-4 glasss and to add corrosion resistant powder and curing setting accelerator 50 seconds the time.2. step need carry out three times; wherein the thickness of Pen Tu each layer paste polymerization silicate mixed material is 2mm; thereby the thickness that makes last resulting inner wall protection structure is 9.2mm; wherein; the thickness that contains the polymerization silicate cured layer 1 of enhancement Layer 3 is 9mm, and the thickness that contains the epoxy coating cured layer 2 of enhancement Layer 3 is 0.2mm.
(embodiment 4, be used for the old chimney of factory's coal-burning boiler)
As shown in Figure 2; basic identical among the shell body 4 of chimney body, lining 5, air flow passage 6 and inner wall protection structure and the embodiment 1; difference is: enhancement Layer 3 is spread respectively and is buried and be cemented in polymerization silicate cured layer 1 and the epoxy coating cured layer 2, and the sum of enhancement Layer 3 has two-layer.
Form basic identical among concrete steps and the embodiment 1 of method of inner wall protection structure of chimney body, difference is: the heating-up temperature when step stirs in 1. is 90 ℃ and reaches in viscosity and to be coated with-4 glasss and to add corrosion resistant powder and curing setting accelerator 40 seconds the time.Step 4. in behind the thick liquid coating of the surface of polymerization silicate cured layer 1 spraying one deck 0.5mm, laying a layer thickness is the fiberglass gridding cloth as enhancement Layer 3 of 1mm, as this glass grid cloth surface-coated liquid coating of enhancement Layer 3 and cover enhancement Layer 3,5. normal temperature carry out step after being placed into liquid coating layer surface drying more again.The thickness of the last inner wall protection structure that forms is 4.5mm, and wherein, the thickness that contains the polymerization silicate cured layer 1 of enhancement Layer 3 is 3mm, and the thickness that contains the epoxy coating cured layer 2 of enhancement Layer 3 is 1.5mm.
(embodiment 5, be used for the old chimney of factory's coal-burning boiler)
Basic identical among the shell body 4 of chimney body, lining 5, air flow passage 6 and inner wall protection structure and the embodiment 4; difference is: enhancement Layer 3 in the polymerization silicate cured layer 1 is buried and be cemented in the shop to be had two-layerly, and the enhancement Layers 3 that the shop is buried and is cemented in the epoxy coating cured layer 2 have two-layer.
Form basic identical among the concrete steps of method of chimney body inner wall protection structure and the embodiment 4; difference is: 2. step need carry out twice; promptly lay make coated paste polymerization silicate mixed material surface drying under first floor fiberglass gridding cloth 3,, the normal temperature floating with paste polymerization silicate mixed material after; spray the thick paste polymerization silicate mixed material of one deck 2mm again; and then lay second layer fiberglass gridding cloth 3, make coated paste polymerization silicate mixed material surface drying under, the normal temperature floating with paste polymerization silicate mixed material.4. step need carry out twice, promptly lay first floor fiberglass gridding cloth 3 and apply liquid coating cover make liquid coating layer surface drying under enhancement Layer 3, the normal temperature after, spray the thick liquid coating of one deck 0.5mm again, and then lay second layer fiberglass gridding cloth 3, cover under enhancement Layer 3, the normal temperature with liquid coating and make liquid coating layer surface drying.The thickness of the last inner wall protection structure that forms is 9mm, and wherein, the thickness that contains the polymerization silicate cured layer 1 of enhancement Layer 3 is 6mm, and the thickness that contains the epoxy coating cured layer 2 of enhancement Layer 3 is 3mm.
(embodiment 6, be used for the old chimney of factory's coal-burning boiler)
Basic identical among the shell body 4 of chimney body, lining 5, air flow passage 6 and inner wall protection structure and the embodiment 5; difference is: the enhancement Layer 3 that the shop is buried and is cemented in the polymerization silicate cured layer 1 has three layers, and the enhancement Layer 3 that the shop is buried and is cemented in the epoxy coating cured layer 2 has two-layer.
Form basic identical among the concrete steps of method of inner wall protection structure of chimney body and the embodiment 5, difference is: 2. step need carry out three times.4. step need carry out twice.The thickness of the last inner wall protection structure that forms is 12mm, and wherein, the thickness that contains the polymerization silicate cured layer 1 of enhancement Layer 3 is 9mm, and the thickness that contains the epoxy coating cured layer 2 of enhancement Layer 3 is 3mm.
(embodiment 7, be used for the old chimney of factory's coal-burning boiler)
Basic identical among the shell body 4 of chimney body, lining 5, air flow passage 6 and inner wall protection structure and the embodiment 5; difference is: the enhancement Layer 3 that the shop is buried and is cemented in the polymerization silicate cured layer 1 has one deck, and the enhancement Layer 3 that the shop is buried and is cemented in the epoxy coating cured layer 2 has two-layer.
Form basic identical among the concrete steps of method of inner wall protection structure of chimney body and the embodiment 5, difference is: 4. step need carry out twice.The thickness of the last inner wall protection structure that forms is 6mm, and wherein, the thickness that contains the polymerization silicate cured layer 1 of enhancement Layer 3 is 3mm, and the thickness that contains the epoxy coating cured layer 2 of enhancement Layer 3 is 3mm.
(embodiment 8, be used for the old chimney of factory's coal-burning boiler)
Basic identical among the shell body 4 of chimney body, lining 5, air flow passage 6 and inner wall protection structure and the embodiment 5; difference is: the enhancement Layer 3 that the shop is buried and is cemented in the polymerization silicate cured layer 1 has three layers, and the enhancement Layer 3 that the shop is buried and is cemented in the epoxy coating cured layer 2 has one deck.
Form basic identical among the concrete steps of method of inner wall protection structure of chimney body and the embodiment 5, difference is: 2. step need carry out three times.The thickness of the last inner wall protection structure that forms is 10.5mm, and wherein, the thickness that contains the polymerization silicate cured layer 1 of enhancement Layer 3 is 9mm, and the thickness that contains the epoxy coating cured layer 2 of enhancement Layer 3 is 1.5mm.
(embodiment 9, be used for the old chimney of factory's coal-burning boiler)
Basic identical among the shell body 4 of chimney body, lining 5, air flow passage 6 and inner wall protection structure and the embodiment 5; difference is: enhancement Layer 3 in the polymerization silicate cured layer 1 is buried and be cemented in the shop to be had two-layerly, and the enhancement Layers 3 that the shop is buried and is cemented in the epoxy coating cured layer 2 have one deck.
Form basic identical among the concrete steps of method of inner wall protection structure of chimney body and the embodiment 5, difference is: 2. step need carry out twice.The thickness of the last inner wall protection structure that forms is 7.5mm, and wherein, the thickness that contains the polymerization silicate cured layer 1 of enhancement Layer 3 is 6mm, and the thickness that contains the epoxy coating cured layer 2 of enhancement Layer 3 is 1.5mm.
(embodiment 10, be used for the old chimney of factory's coal-burning boiler)
Basic identical among the shell body 4 of chimney body, lining 5, air flow passage 6 and inner wall protection structure and the embodiment 5; difference is: the enhancement Layer 3 that the shop is buried and is cemented in the polymerization silicate cured layer 1 has four layers, and the enhancement Layer 3 that the shop is buried and is cemented in the epoxy coating cured layer 2 has three layers.
Form basic identical among the concrete steps of method of inner wall protection structure of chimney body and the embodiment 5, difference is: 2. step need carry out four times, and wherein the thickness of Pen Tu each layer paste polymerization silicate mixed material is 3mm.4. step need carry out three times, and wherein the thickness of Pen Tu each layer liquid coating is 1mm.The thickness of the last inner wall protection structure that forms is 22mm, and wherein, the thickness that contains the polymerization silicate cured layer 1 of enhancement Layer 3 is 16mm, and the thickness that contains the epoxy coating cured layer 2 of enhancement Layer 3 is 6mm.
(embodiment 11, be used for the old chimney of factory's coal-burning boiler)
Basic identical among the shell body 4 of chimney body, lining 5, air flow passage 6 and inner wall protection structure and the embodiment 5; difference is: the enhancement Layer 3 that the shop is buried and is cemented in the polymerization silicate cured layer 1 has seven layers, and the enhancement Layer 3 that the shop is buried and is cemented in the epoxy coating cured layer 2 has six layers.
Form basic identical among the concrete steps of method of inner wall protection structure of chimney body and the embodiment 5, difference is: 2. step need carry out seven times, and wherein the thickness of Pen Tu each layer paste polymerization silicate mixed material is 5mm.4. step need carry out six times, and wherein the thickness of Pen Tu each layer liquid coating is 3mm.The thickness of the last inner wall protection structure that forms is 66mm, and wherein, the thickness that contains the polymerization silicate cured layer 1 of enhancement Layer 3 is 42mm, and the thickness that contains the epoxy coating cured layer 2 of enhancement Layer 3 is 24mm.
Embodiment 1-embodiment 11 formed chimney bodies with inner wall protection structure in the boiler desulfurization system of heat interchanger is not installed, use the several months, and each equipment operation of system is stable, normal, at present still on probation.
Table 1
| Material name, specification and parts by weight | Embodiment | ||||||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | |||
| The polymerization silicate cured layer | Ludox (SiO 2Content 25wt%) | 100 | / | 100 | 80 | 60 | 50 | 40 | 20 | 100 | / | / | |
| Neutral water glass (technical grade) | / | 100 | / | 20 | 40 | 50 | 60 | 80 | / | 100 | 100 | ||
| Diabase flour (300 order) | 40 | 20 | / | 60 | / | / | 40 | / | / | / | / | ||
| Diabase particle (particle diameter is less than 1.5mm) | / | / | / | / | / | 50 | / | / | / | 30 | / | ||
| Calcining quartz powder (300 order) | / | 20 | 40 | / | / | / | 10 | 50 | / | / | / | ||
| Calcining quartz particle (particle diameter is less than 1.5mm) | / | / | / | / | 30 | / | / | / | 40 | 20 | / | ||
| Glass-cermic powder (300 order) | / | 10 | 20 | / | / | / | 5 | / | / | / | 40 | ||
| Cast stone particle (particle diameter is less than 1.5mm) | / | / | / | / | 15 | / | / | / | / | 10 | / | ||
| Prodan (purity 99wt%) | 20 | / | / | 15 | / | / | 5 | / | 10 | / | / | ||
| Ammonium fluoride (purity 99wt%) | / | 10 | / | / | 15 | 10 | / | 5 | / | 20 | / | ||
| Enhancement Layer | Alkaline-resisting type fiberglass gridding cloth (aperture 4 * 4mm) | The number of plies in the polymerization silicate cured layer | 1 | 2 | 3 | 1 | 2 | 3 | 1 | 3 | 2 | 4 | 7 |
| The number of plies in the epoxy coating cured layer | / | / | / | 1 | 2 | 2 | 2 | 1 | 1 | 3 | 6 | ||
| The epoxy coating cured layer | Heat resistant type novolac epoxy resin (epoxide number is 0.6eq/100g, and easily saponification chlorine is 0.3wt%, and inorganic chlorine is 160ppm) | 100 | / | 100 | / | 100 | / | 100 | / | 100 | 100 | / | |
| Heat resistant type novolac epoxy resin (epoxide number is 0.5eq/100g, and easily saponification chlorine is 0.4wt%, and inorganic chlorine is 170ppm) | / | 100 | / | 100 | / | 100 | / | 100 | / | / | 100 | ||
| Expoxy propane butyl glycidyl ether (epoxide number is 0.6mol/100g) | 20 | / | / | / | / | / | / | 30 | / | / | 40 | ||
| Phenyl glycidyl ether (epoxide number is 0.5mol/100g) | / | 40 | / | / | / | / | / | / | / | 30 | / | ||
| Amyl group glycidol ether (epoxide number is 0.38mol/100g) | / | / | 30 | / | / | / | / | / | 25 | / | / | ||
| Epoxy propane butyl ether (epoxide number is 0.6mol/100g) | / | / | / | 25 | / | / | / | / | / | / | / | ||
| Expoxy propane amyl ether (epoxide number is 0.5mol/100g) | / | / | / | / | 30 | / | / | / | / | / | / | ||
| Expoxy propane phenyl ether (epoxide number is 0.55mol/100g) | / | / | / | / | / | 30 | / | / | / | / | / | ||
| Expoxy propane isobutylphenyl ether (epoxide number is 0.6mol/100g) | / | / | / | / | / | / | 35 | / | / | / | / | ||
| Alicyclic modified amine (the amine value is 300mgKOH/g) | / | 50 | / | / | 60 | / | / | 70 | / | / | 55 | |
| Modified aromatic amine (the amine value is 680mgKOH/g) | 60 | / | / | / | / | / | 55 | / | 65 | 70 | / | |
| Modified fatty amine (the amine value is 500mgKOH/g) | / | / | 70 | 50 | / | 60 | / | / | / | / | / | |
| Diabase flour (300 order) | 10 | / | 15 | / | 20 | / | 25 | / | 20 | 30 | / | |
| Glass-cermic powder (300 order) | / | 10 | / | 15 | / | 20 | / | 25 | / | / | 30 |
Claims (10)
1, a kind of boiler chimney body, shell body (4) and the lining (5) of fixedlying connected with tubular with shell body (4) inwall, it is characterized in that: also have inner wall protection structure, it is the composite construction of the resistant to elevated temperatures polymerization silicate cured layer of fixed all-in-one-piece resistance to acid attack (1), the resistant to elevated temperatures epoxy coating cured layer of resistance to acid attack (2) and enhancement Layer (3); Polymerization silicate cured layer (1) is cemented on the inner surface of lining (5); Epoxy coating cured layer (2) is cemented on the polymerization silicate cured layer (1); Enhancement Layer (3) is a fiberglass gridding cloth; Enhancement Layer (3) shop is buried and is cemented in the polymerization silicate cured layer (1), and the sum of enhancement Layer (3) has one deck at least, perhaps enhancement Layer (3) is spread respectively and is buried and be cemented in polymerization silicate cured layer (1) and the epoxy coating cured layer (2), and the sum of enhancement Layer (3) has at least two-layer.
2, boiler chimney body according to claim 1 is characterized in that: used raw material and the consumption of polymerization silicate cured layer (1) that forms described inner wall protection structure is: silicate colloid 100 weight portions, corrosion resistant powder or pellet 40～60 weight portions and curing setting accelerator 0～20 weight portion; Used raw material and the consumption of epoxy coating cured layer (2) that forms described inner wall protection structure is: heat resistant type epoxy resin 100 weight portions, reactive diluent 20～40 weight portions, amine curing agent 50～70 weight portions and mineral filler 10～30 weight portions.
3, boiler chimney body according to claim 2 is characterized in that: the silicate colloid is a kind or 2 kinds in Ludox, the water glass; Corrosion resistant powder is a kind, 2 kinds or 3 kinds in diabase flour, calcining quartz powder, the glass-cermic powder, or corrosion resistant pellet is a kind, 2 kinds or 3 kinds in diabase particle, calcining quartz particle, the cast stone particle; Solidifying setting accelerator is prodan or ammonium fluoride; Heat resistant type epoxy resin is the heat resistant type novolac epoxy resin; Reactive diluent is epoxy propane butyl ether, expoxy propane butyl glycidyl ether, expoxy propane amyl ether, expoxy propane phenyl ether, expoxy propane isobutylphenyl ether, phenyl glycidyl ether or amyl group glycidol ether; Amine curing agent is aliphatic amine, alicyclic amine curing compound, aromatic amine or modified amine curing agent; Mineral filler is diabase flour or glass-cermic powder.
4, boiler chimney body according to claim 1, it is characterized in that: described enhancement Layer (3) shop is buried and is cemented in the polymerization silicate cured layer (1), and enhancement Layer (3) has 1 to 3 layer in polymerization silicate cured layer (1), and the gross thickness that contains the polymerization silicate cured layer (1) of enhancement Layer (3) is 3～50mm, and the thickness of epoxy coating cured layer (2) is 0.2～10mm.
5, boiler chimney body according to claim 1, it is characterized in that: described enhancement Layer (3) is spread respectively and is buried and be cemented in polymerization silicate cured layer (1) and the epoxy coating cured layer (2), and enhancement Layer (3) has 1 to 3 layer in polymerization silicate cured layer (1), the gross thickness that contains the polymerization silicate cured layer (1) of enhancement Layer (3) is 3～50mm, enhancement Layer (3) has 1 to 2 layer in epoxy coating cured layer (2), and the gross thickness that contains the epoxy coating cured layer (2) of enhancement Layer (3) is 1.2～30mm.
6, boiler chimney body according to claim 5 is characterized in that: the gross thickness that the polymerization silicate cured layer (1) of enhancement Layer (3) is arranged is 3 to 10mm, and the gross thickness that the epoxy coating cured layer (2) of enhancement Layer (3) is arranged is 3 to 8mm.
7, a kind of method of inner wall protection structure of the boiler chimney body that forms claim 1 is characterized in that: enhancement Layer (3) shop is buried and is cemented in the polymerization silicate cured layer (1); Concrete steps are: 1. will form the raw materials used silicate colloid of polymerization silicate cured layer (1), be heated to 80～100 ℃ under stirring, make its hydrolysis, polymerization,, material viscosity is coated with-4 glasss when reaching 30～50 seconds the time, add corrosion resistant powder or pellet and solidify setting accelerator, mix and make paste polymerization silicate mixed material; 2. the paste polymerization silicate mixed material that 1. makes with step, inner surface at chimney body lining (5) applies one deck, its thickness is at least 2mm, spread the fiberglass gridding cloth of one deck then as enhancement Layer (3), floating with paste polymerization silicate mixed material, make the paste polymerization silicate mixed material surface drying of coating under the normal temperature; According to the number of plies requirement that enhancement Layer (3) is set in polymerization silicate cured layer (1), this step is carried out once at least; 3. placed at least at normal temperatures 24 hours, solidify fully, form the polymerization silicate cured layer (1) that contains enhancement Layer (3) that reaches specific thickness 3～50mm up to coated polymerization silicate mixed material; The various raw materials that 4. will form epoxy coating cured layer (2) mix and obtain liquid coating, and this liquid coating is coated in the surface of polymerization silicate cured layer (1), and its thickness is at least 0.2mm; 5. normal temperature is placed down; up to coating solidify to form fully reach specific thickness 0.2～10mm with polymerization silicate cured layer (1) fixed all-in-one-piece epoxy coating cured layer (2), and the final inner wall protection structure that is fixed on the boiler chimney body lining (5) that forms.
8, according to the method for the inner wall protection structure of the described formation boiler chimney body of claim 6, it is characterized in that: when step applies paste polymerization silicate mixed material in 2., adopt the method for spraying or blade coating; When step applies liquid coating in 4., adopt the method for spraying, brushing, roller coating or blade coating; 2. step is meant environment temperature to the normal temperature of step in 5..
9, a kind of method of inner wall protection structure of the boiler chimney body that forms claim 1, it is characterized in that: enhancement Layer (3) is spread respectively and is buried and be cemented in polymerization silicate cured layer (1) and the epoxy coating cured layer (2); Concrete steps are: 1. will form the raw materials used silicate colloid of polymerization silicate cured layer (1), be heated to 80～100 ℃ under stirring, make its hydrolysis, polymerization,, material viscosity is coated with-4 glasss when reaching 30～50 seconds the time, add corrosion resistant powder or pellet and solidify setting accelerator, mix and make paste polymerization silicate mixed material; 2. the paste polymerization silicate mixed material that 1. makes with step, inner surface at chimney body lining (5) applies one deck, its thickness is at least 2mm, spread the fiberglass gridding cloth of one deck then as enhancement Layer (3), floating with paste polymerization silicate mixed material, make the paste polymerization silicate mixed material surface drying of coating under the normal temperature; According to the number of plies requirement that enhancement Layer (3) is set in polymerization silicate cured layer (1), this step is carried out once at least; 3. placed at least 24 hours at normal temperatures, solidify fully, form the polymerization silicate cured layer (1) that contains enhancement Layer (3) that reaches specific thickness 3～50mm up to coated polymerization silicate mixed material; The various raw materials that 4. will form epoxy coating cured layer (2) mix and obtain liquid coating, this liquid coating is coated in polymerization silicate cured layer (1) surface, its thickness is at least 0.2mm, spread the fiberglass gridding cloth of one deck then as enhancement Layer (3), go up at this enhancement Layer (3) and apply liquid coating covering enhancement Layer (3), normal temperature is placed into liquid coating layer surface drying; According to the number of plies requirement that enhancement Layer (3) is set in epoxy coating cured layer (2), this step is carried out once at least; 5. normal temperature is placed, and solidify to form the epoxy coating cured layer (2) that contains enhancement Layer (3) that reaches specific thickness 1.2～30mm fully up to coat, and the final inner wall protection structure that is fixed on the boiler chimney body lining (5) that forms.
10, according to the method for the inner wall protection structure of the described formation boiler chimney body of claim 9, it is characterized in that: when step applies paste polymerization silicate mixed material in 2., adopt the method for spraying or blade coating; When step applies liquid coating in 4., adopt the method for spraying, brushing, roller coating or blade coating; 2. step is meant environment temperature to the normal temperature of step in 5..
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Assignee: Jiangsu Huanai Lining Material Co., Ltd. Assignor: Chen Haiyuan Contract fulfillment period: 2008.3.1 to 2013.3.1 contract change Contract record no.: 2009320000277 Denomination of invention: Boiler chimney body and method for forming its inner wall protection structure Granted publication date: 20080130 License type: Exclusive license Record date: 2009.3.10 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.3.1 TO 2013.3.1; CHANGE OF CONTRACT Name of requester: JIANGSU HUANAI LINER MATERIALS CO., LTD. Effective date: 20090310 |
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