CN201373206Y

CN201373206Y - Fabric expansion joint for waste heat power generation

Info

Publication number: CN201373206Y
Application number: CN200820241008U
Authority: CN
Inventors: 赵德威
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-12-25
Filing date: 2008-12-25
Publication date: 2009-12-30
Anticipated expiration: 2018-12-25

Abstract

The utility model relates to a fabric expansion joint for waste heat power generation, which comprises a press plate, a bolt, a skin wrapped by a stainless steel mesh, a heat-insulation bag, a separation net, a metallic frame, a guide shell and an end pipe. The guide shell is welded on the end pipe on one side. A heat-insulation layer is arranged in the metallic frame. The heat-insulation layer includes the heat-insulation bag and the separation net. The skin and the separation net are fixed on the metallic frame through the press plate and the bolt. The heat-insulation bag is made of three kinds of materials so as to satisfy the use of high-temperature, medium-temperature and low-temperature waste heat pipes. The utility model has the advantages that the structure is simple, the design is reasonable, the installation is convenient, the scope of the used materials is wide, the manufacturing is easy, the strength is high and the service life is long, the expansion joint can adapt to the positive-pressure working environment and the negative-pressure working environment, the applicability is wide and the popularization and application value are good.

Description

Cogeneration saves with its expansion

Technical field

The utility model relates to a kind of cogeneration and saves with its expansion, is used for the connection set that canceller expands with heat and contract with cold on specifically a kind of pipeline that is installed in cogeneration, belongs to the pipe joint field.

Background technique

Along with development and national economy, for advancing comprehensive utilization of resources, the technology of cogeneration is promoted fast.The domestic cogeneration project of having moved still compares science, more rational in technology arrangement and equipment disposition, but also has some problems in the real-world operation at present, especially the wearing and tearing of hot air duct aggravation, expansion joint damages, and keeps in repair, more renews part, influence is produced, and operation rate is reduced.As the cement plant, because of most of cogeneration projects are set up after the cement production line layout is finished, so just unavoidably when the cogeneration layout increase many elbows, and since exhaust heat boiler the flowing resistance that has increased system is set.For the normal running that does not influence rotary kiln must improve wind speed, caused the aggravation of hot air duct and expansion joint damage just because of the change of wind direction and wind speed.Utilize the cogeneration of rotary kiln, the high-temp waste gas waste heat supply temperature is greater than 650 ℃, and middle low temperature waste gas waste heat supply temperature is generally at 350～650 ℃, and the low temperature waste gas waste heat supply temperature is less than 350 ℃.In hot air duct, medium in the pipeline is high temperature, high pressure, high flow rate, high corrosion and high dust-laden and deposit often, waste gas produces high-strength vibrations and noise in pipeline, the pipeline expanded by heating produces displacement, equipment in the piping is produced bigger thrust, gently then cause equipment normally not move, heavy then can destroy equipment in pipeline and the piping.Therefore to guarantee that equipment, piping normally move, interface to piping has clear and definite requirement and restriction, and expansion joint is exactly a composite set important in the cogeneration piping, the installing fabric expansion joint is a best choice in the cogeneration piping, it is little that its expansion joint has rigidity, noise elimination, shock insulation and absorption displacement provide advantages such as large compensation amount and easy installation.But, before the utility model, the its expansion joint that cogeneration is used, exist bad, the long-term hot operation of resistance to high temperature, scaling loss expansion joint very easily, also exist the tension force that can not bear the different direction that malleation and negative pressure cause in the pipeline, high-strength tension force often makes covering spalling or breakage, and these two principal elements have influenced the working life of expansion joint.Therefore must provide a kind of can bear high dust, high wind speed and anti abrasive cogeneration and save with its expansion.

Summary of the invention

It is a kind of simple in structure, easy to make that the purpose of this utility model is to provide, and can bear two kinds of working environments of high wind speed, dust concentration height and malleation and negative pressure, and wear-resisting and cogeneration long service life saves with its expansion.

The utility model in order to achieve the above object, provide a kind of cogeneration to save with its expansion, comprise pressing plate (1), bolt (2), covering (3), thermal-protective coating, metal framework (7), guide shell (6) and end pipe (8), guide shell is welded on the side pipe, be provided with thermal-protective coating in the metal framework, thermal-protective coating is made up of insulated bag and isolation net, by pressing plate, bolt covering and isolation net is fixed on the metal framework.

The utility model cogeneration saves with its expansion, and described covering (3) is made of Stainless Steel Cloth wrapped multiple fabric.Adopt the covering of parcel Stainless Steel Cloth can improve covering intensity, Stainless Steel Cloth can absorption portion tension force when pipeline moves simultaneously.In the pipeline of cogeneration, when generator was worked, the waste gas of high heat will be discharged, and forms negative pressure in pipeline, and its expansion joint just must can bear negative pressure tension force; In order to make vapour system stable operation, install cold blast sliding valve at the cooling machine additional to setting chamber section airduct when medium temperature is too high, so that at any time to the kiln hood air-supply, form malleation during air-supply in pipeline, its expansion joint also must can bear the tension force of malleation; Therefore can improve its expansion joint with the covering of two sides parcel Stainless Steel Cloth and bear the tension force that two kinds of working environments of positive and negative pressure bring.

The utility model cogeneration saves with its expansion, described thermal-protective coating is made up of insulated bag (4) and isolation net (5), insulated bag selects for use different materials to make according to the temperature of the medium in the pipeline, being used for waste heat supply temperature makes less than 350 ℃ low temperature waste gas pipeline employing glass fiber cloth parcel ceramic fiber cotton, the low temperature waste gas pipeline that is used for waste heat supply temperature and is 350～650 ℃ adopts cotton making of asbestos cloth parcel ceramic fiber, is used for waste heat supply temperature and adopts resistant to elevated temperatures ceramic fiber cloth parcel ceramic fiber blanket to make greater than 650 ℃ high-temp waste gas pipeline.Described isolation net is a Stainless Steel Cloth, protects insulated bag with the isolation net holder, and has dog to fix, and at last the edge inflection of isolation net is pressed under the covering, with pressing plate, bolt covering and isolation net is fixed on the metal framework.When adopting dog fixedly thermal-protective coating can prevent that pipeline from working under malleation or two kinds of environment of negative pressure, strong vibrations and multidirectional tension force make the cotton displacement of the ceramic fiber in the insulated bag, cause cellucotton accumulation and sparse, the function of dog is to guarantee that thermal-protective coating is even, the high temperature of medium can not be scurried to covering, guarantee effect of heat insulation.Adopting isolation net is that insulated bag is protected in the Stainless Steel Cloth holder; the same sparse and effect of piling up that prevents that ceramic fiber blanket and cellucotton displacement from causing is arranged; on the other hand Stainless Steel Cloth can absorption portion tension force; also isolating insulated bag is subjected to guide shell (6) and directly grinds sassafras or bump; the protection insulated bag prolongs its expansion and saves working life.

The utility model cogeneration saves with its expansion, and described guide shell (6) is welded on the side pipe, and draft tube diameter is littler than end pipe diameter.

Its expansion joint of the present utility model has following advantage:

1, the utility model adopts Stainless Steel Cloth parcel covering; adopt Stainless Steel Cloth to make isolation net simultaneously; and the covering that will wrap up Stainless Steel Cloth is fixed on the metal framework with isolation net; these three measures improve covering and thermal-protective coating intensity; can solve the problem that when the pipeline positive pressure is too big, produced the bloated bad covering of hightension; simultaneously Stainless Steel Cloth can absorb partial tension that positive and negative pressure in service brings and isolation insulated bag and is subjected to guide shell (6) and directly grinds sassafras or bump, protects insulated bag.

2, the utility model adopts three kinds of materials to make insulated bag, to adapt to the working environment of high, medium and low cogeneration, can reduce cost; Protecting insulated bag with the Stainless Steel Cloth holder forms thermal-protective coating and fixes assurance effect of heat insulation and the working life of improving expansion joint with dog.

3, its expansion of the present utility model joint have making simple in structure, reasonable in design, easy, easy for installation, intensity is high, applicability is wide, characteristics such as long service life, can adapt to two kinds of working environments of malleation and negative pressure, be suitable as high, medium and low cogeneration and save, have good value for applications with its expansion.

Description of drawings

Below the utility model is described in further detail with accompanying drawing:

Fig. 1 saves structural representation for the utility model cogeneration with its expansion.

Fig. 2 is the structure enlarged diagram at Fig. 1 center platen and bolt place.Figure center platen, bolt are fixed on covering and isolation net on the metal framework.

Among the above-mentioned figure, 1. pressing plate, 2. bolt, 3. covering, 4. insulated bag, 5. isolation net, 6. guide shell, 7. metal framework, 8. end pipe.

Embodiment

Embodiment 1: the utility model cogeneration saves with its expansion, and structure as shown in Figure 1.Constitute by pressing plate 1, bolt 2, covering 3, insulated bag 4, isolation net 5, guide shell 6, metal framework 7 and end pipe 8.When making the utility model, weld a guide shell earlier on a side pipe, guide shell adopts the Q235 steel to do; Covering employing Stainless Steel Cloth wrapped multiple--lateral silicon adhesive plaster, glass cloth, two-sided silica gel cloth or tetrafluoro cloth are made; Isolation net is a Stainless Steel Cloth; In the cavity of metal framework and end pipe formation, spread Stainless Steel Cloth, in Stainless Steel Cloth, lay the insulated bag 4 that adopts resistant to elevated temperatures ceramic fiber cloth parcel ceramic fiber blanket to make, again the inflection of Stainless Steel Wire network edge, the last covering that has wrapped up Stainless Steel Cloth of completing thereon, also the edge inflection of covering, be fixed on the metal framework covering with as the Stainless Steel Cloth of isolation net with pressing plate, bolt.The utility model its expansion joint has just been made.

The utility model its expansion of making is saved in the combined cycle cogeneration pipeline of blast furnace gas products of combustion, be installed in the boiler inlet and connect selector valve and sheet-metal lagging, the high-temp waste gas of combustion turbine is introduced in the boiler, serviceability temperature is normally at 600 ℃, and instantaneous temperature is greater than 650 ℃, pressure 5.884MPa, axial displacement ± 30mm, lateral displacement amount ± 15mm can bear high temperature and high pressure, and long service life.

Embodiment 2: low cogeneration saves circle, inside nominal diameter 2600mm in making the utility model with its expansion.Structure as shown in Figure 1.Wherein insulated bag 4 adopts the cotton making of asbestos cloth parcel ceramic fiber, protects insulated bag with the Stainless Steel Cloth holder, and other working process are with embodiment 1.The utility model its expansion of making is saved in the pipeline of cement plant cogeneration, be installed in grate cooler to the hot-blast pipe line of setting chamber, serviceability temperature is normally at 360 ℃, moment can reach 500 ℃, expansion joint axial expansion amount 150mm, radial expansion volume 50mm can bear the subnormal ambient of 2000Pa and long service life.

That expansion joint of the present utility model has is simple in structure, reasonable in design, wide with the material source, easily make, Easy for installation, intensity is high, applicability is wide, the characteristics such as wear-resisting and long service life can adapt to malleation and negative Press two kinds of working environments, be adapted at cogeneration that building materials industry such as cement dry method produce, firing ceramics kiln, The afterheat generating system of glass furnace, metallurgical industry such as blast furnace, sintering, the cogeneration of ore smelting electrothermal furnace, Use in the industry such as waste incineration and the chemical industry afterheat generating system, have good value for applications.

Claims

1, a kind of cogeneration saves with its expansion, comprise pressing plate, bolt, covering, thermal-protective coating, metal framework, guide shell and end pipe, it is characterized in that guide shell is welded on the side pipe, be provided with thermal-protective coating in the metal framework, thermal-protective coating is made up of insulated bag and isolation net, by pressing plate, bolt covering and isolation net is fixed on the metal framework.

2, cogeneration according to claim 1 saves with its expansion, it is characterized in that covering is made of Stainless Steel Cloth wrapped multiple fabric.

3, cogeneration according to claim 1 saves with its expansion, it is characterized in that thermal-protective coating is made up of insulated bag and isolation net, insulated bag selects for use different materials to make according to the temperature of the medium in the pipeline, being used for waste heat supply temperature makes less than 350 ℃ low temperature waste gas pipeline employing glass fiber cloth parcel ceramic fiber cotton, the low temperature waste gas pipeline that is used for waste heat supply temperature and is 350～650 ℃ adopts cotton making of asbestos cloth parcel ceramic fiber, is used for waste heat supply temperature and adopts resistant to elevated temperatures ceramic fiber cloth parcel ceramic fiber blanket to make greater than 650 ℃ high-temp waste gas pipeline.

4, cogeneration according to claim 1 saves with its expansion, it is characterized in that isolation net is a Stainless Steel Cloth, protect insulated bag with the isolation net holder, and there is dog to fix, at last the edge inflection of isolation net is pressed under the covering, covering and isolation net is fixed on the metal framework with pressing plate, bolt.