CN216740931U - Single-cylinder type corrosion-resistant chimney - Google Patents

Abstract

The utility model provides a single-cylinder type corrosion-resistant chimney which comprises a concrete supporting section and a steel structure cylinder section which are arranged from bottom to top; steel construction barrel section inner wall is equipped with anticorrosive coating one, concrete support section top be equipped with the deposition platform that anticorrosive coating is connected, be equipped with mortar on the deposition platform and collect the hole, mortar is collected the bottom in hole and is passed through mortar discharge pipe and the inside mortar collecting pit intercommunication of concrete support section. According to the utility model, the lower concrete supporting section and the upper steel structure cylinder section are combined, so that respective mechanical properties of a concrete structure and a steel structure can be exerted, the steel structure cylinder section does not need to be additionally provided with a complex supporting structure, the construction process is simple and convenient, and the construction period is short.

Description

Single-cylinder type corrosion-resistant chimney

Technical Field

The utility model relates to the technical field of flue gas emission, in particular to a single-cylinder type corrosion-resistant chimney.

Background

The flue gas that produces among the industrial production contains a large amount of corrosive substance, and although the flue gas is through dust removal, denitration, desulfurization processing, corrosive substance still can not thoroughly eliminate, will get into the chimney that is the flue gas emission terminal with the form of gas or atomizing liquid, and then can produce the corruption of different degrees to the chimney wall.

Through technical development and engineering experience accumulation for decades, China forms various corrosion-resistant chimney forms. The steel chimney is supported by a steel chimney, and the steel chimney is supported by a self-supporting steel chimney, a concrete outer cylinder, a steel inner cylinder sleeve type chimney and a steel tower frame.

The application height of the self-supporting steel chimney is limited, and the self-supporting steel chimney is generally considered to be poor in economy and unsafe after the application height exceeds 100 m; the concrete outer cylinder support and the steel inner cylinder sleeve type chimney have wide application height range, generally 80-260 m, but have complex construction process, long construction period and high construction cost; the steel tower support and the steel chimney cylinder are in the form of a steel tower support and a steel chimney cylinder, the application height range is generally 60-160 m, but the problems of complex construction process and higher construction cost exist.

In view of the above, there is a need for a single-cylinder corrosion-resistant chimney to solve the problems in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a single-cylinder type corrosion-resistant chimney to solve the problems of complex construction process and high construction cost of the existing chimney.

In order to achieve the purpose, the utility model provides a single-cylinder type corrosion-resistant chimney which comprises a concrete supporting section and a steel structure cylinder section which are arranged from bottom to top; steel construction barrel section inner wall is equipped with anticorrosive coating one, concrete support section top be equipped with the deposition platform that anticorrosive coating is connected, be equipped with mortar on the deposition platform and collect the hole, mortar discharge pipe and the inside mortar collecting pit intercommunication of concrete support section are passed through to the bottom that the hole was collected to the mortar.

Preferably, a diversion cushion layer is arranged on the periphery of the mortar collecting pit, and the gradient of the diversion cushion layer is 5% -10%; and the upper surfaces of the mortar collecting pit and the diversion cushion layer are provided with a second anticorrosive layer.

Preferably, an annular bracket and an overhaul platform placed on the annular bracket are arranged in the concrete supporting section; the maintenance platform is positioned below the dust deposition platform, a maintenance manhole pipe is arranged on the dust deposition platform, and a cover plate is arranged on the maintenance manhole pipe; and a water stop ring for sealing is arranged on the peripheral surface of the manhole pipe.

Preferably, the overhaul platform comprises a precast beam frame layer, a profiled steel sheet template layer and a reinforced concrete layer which are arranged from bottom to top, and the precast beam frame layer is arranged at the top of the annular bracket.

Preferably, the maintenance platform is provided with a mortar discharge pipe through hole; the mortar discharge pipe comprises a first discharge pipe section and a second discharge pipe section, the starting end of the first discharge pipe section is connected with the mortar collecting pit, and the starting end of the second discharge pipe section is provided with an open part opposite to the tail end of the first discharge pipe section; the concrete support section is internally provided with a plurality of pre-buried connecting pieces for fixing a mortar discharge pipe.

Preferably, the concrete support section comprises a chimney foundation section, a concrete cylinder section and a conversion transition cylinder section which are arranged from bottom to top; the concrete cylinder section is in a circular truncated cone structure with a small top and a big bottom, the gradient of the side wall of the cylinder of the concrete cylinder section is 3% -8%, and the thickness of the side wall of the cylinder is 240-450 mm; the annular bracket is arranged inside the conversion transition cylinder section, the dust deposition platform is arranged at the top of the conversion transition cylinder section, and the wall thickness of the conversion transition cylinder section is thickened from bottom to top.

Preferably, the steel structure cylinder section comprises a plurality of steel smoke exhaust pipe sections which are detachably connected; the steel smoke exhaust pipe joint comprises an external base material layer and an annular stiffening rib arranged on the outer peripheral surface of the external base material layer; the first anticorrosive layer is arranged on the inner wall of the external base material layer and is made of one of a titanium steel plate, a stainless steel plate or an acid-resistant brick.

Preferably, the outer peripheral surface of the steel structure cylinder section is provided with a steel platform, a chimney manhole, a wind breaking ring and a ladder.

Preferably, the steel structure cylinder section is connected with the concrete support section through a through bolt assembly, and a sealing grouting layer is filled between the steel structure cylinder section and the concrete support section.

The technical scheme of the utility model has the following beneficial effects:

(1) according to the utility model, the lower concrete support section and the upper steel structure cylinder section are combined, the respective mechanical properties of a concrete structure and a steel structure can be exerted, the steel structure cylinder section for smoke exhaust does not need to be additionally provided with a complex support structure, the construction process is simple and convenient, the construction period is short, the height of the single-cylinder type corrosion-resistant chimney can reach 60-160 m, the application range is wide, and compared with the chimney form of the concrete outer cylinder and the steel inner cylinder in the prior art, the construction process is simpler and more convenient; the inner wall of the steel structure cylinder section is provided with the first anticorrosive layer, so that the inner wall of the steel structure cylinder section can be prevented from being corroded when smoke is discharged, and the service life of the steel structure cylinder section can be prolonged; and a mortar collecting pit is arranged on the dust accumulation platform, and the bottom of the mortar collecting pit is communicated with a mortar collecting pool in the concrete supporting section through a mortar discharge pipe and is used for collecting dust and mortar in the flue gas.

(2) According to the chimney, the inclined flow guide cushion layer is arranged on the periphery of the mortar collection pit, so that mortar can be guided into the mortar collection pit conveniently, and the upper surfaces of the mortar collection pit and the flow guide cushion layer are provided with the second anti-corrosion layer for enhancing the anti-corrosion performance of the inner structure of the chimney.

(3) In the utility model, the maintenance platform is positioned below the dust deposition platform and is used for maintaining the connection state of the bottom of the dust deposition platform and the mortar discharge pipe, the connection state of the mortar discharge pipe and the like.

(4) According to the mortar discharge pipe, the opening part which is arranged opposite to the tail end of the first discharge pipe section is arranged at the starting end of the second discharge pipe section of the mortar discharge pipe, so that the tail end of the first discharge pipe section can conveniently extend into the opening part, and the temperature stress generated by the tail end of the first discharge pipe section due to the temperature of flue gas is released while mortar is prevented from leaking.

(5) According to the utility model, the wall thickness of the conversion transition cylinder section is thickened from bottom to top, so that the vertical section of the side wall of the conversion transition cylinder section is in a trapezoidal shape with a thin bottom and a thick top, and the top of the conversion transition cylinder section needs to support a steel structure cylinder section, so that the conversion transition cylinder section needs to bear larger pressure, the wall thickness of the top of the conversion transition cylinder section is gradually increased along the height direction, and the stress condition of the conversion transition cylinder section is favorably improved.

(6) In the utility model, the steel structure cylinder section comprises a plurality of sections of steel smoke exhaust pipe sections which are detachably connected, so that the construction process is convenient, and the construction period of the chimney can be shortened.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic structural diagram of a single-tube type corrosion-resistant chimney according to an embodiment of the present application;

FIG. 2 is a partial schematic structural diagram of FIG. 1 according to an embodiment of the present application;

FIG. 3 is a partial schematic structural diagram of FIG. 2 in an embodiment of the present application;

FIG. 4 is a partial cross-sectional view of a single-tube corrosion-resistant chimney in an embodiment of the present application;

FIG. 5 is a bottom cross-sectional view of a single-barrel corrosion-resistant chimney in an embodiment of the present application;

FIG. 6 is an enlarged detail view of portion A in FIG. 4 according to an embodiment of the present application;

FIG. 7 is a top view of FIG. 1 in an embodiment of the present application;

FIG. 8 is a partial sectional view of a mortar discharge pipe in the embodiment of the present application;

FIG. 9 is a schematic view showing the connection between the pre-buried connector and the mortar discharge pipe in the embodiment of the present application;

wherein, 1, concrete supporting section, 1.1, ash deposition platform, 1.1.1, mortar collecting pit, 1.1.2, diversion cushion layer, 1.1.3, corrosion resistant layer II, 1.1.4, manhole pipe, 1.1.5, cover plate, 1.1.6, water stop ring, 1.2, annular bracket, 1.3, maintenance platform, 1.3.1, precast beam frame layer, 1.3.2, profiled steel sheet template layer, 1.3.3, reinforced concrete layer, 1.3.4, mortar discharge pipe through hole, 1.4, pre-embedded connecting piece, 1.4.1, pre-embedded piece, 1.4.2, steel supporting piece, 1.4.3, U-shaped hoop, 1.5, chimney foundation section, 1.6, concrete cylinder section, 1.7, conversion cylinder transition section, 1.7.1, conversion platform, 1.7.2, opposite-penetrating casing, 2, steel structure cylinder section, 2.5, chimney foundation section, 1.6, concrete cylinder section, reinforced pipe flange, reinforced pipe flange, reinforcing flange, steel pipe, 2.2.2.2.3, 2.2, 2.3, 2.2, 2, 2.3.2, 2, 2.2.2, 2, 2.3.2.2, 2, 2.3, 2, 2.2.3, 2, 2.3, 2, 2.2, 2, 2.2.2, 2, 2.3, 2.2.3, 2.4, 3, 2, 2.4, 2, 2.3, 2, 2.2, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, etc. of steel, 2.5, a wind breaking ring, 2.6, a spiral steel ladder, 2.7, a straight steel ladder, 3, a mortar discharge pipe, 3.1, a first discharge pipe section, 3.2, a second discharge pipe section, 3.2.1, an opening part, 3.2.2, a mortar discharge pipe joint, 4, a mortar collecting pool, 5 and a butt bolt assembly.

Detailed Description

Embodiments of the utility model will be described in detail below with reference to the drawings, but the utility model can be implemented in many different ways, which are defined and covered by the claims.

Example (b):

referring to fig. 1 to 9, the present embodiment is applied to the emission of flue gas from a factory.

A single-cylinder type corrosion-resistant chimney is shown in figure 1 and comprises a concrete supporting section 1 and a steel structure cylinder section 2 which are arranged from bottom to top, and the mechanical properties of a concrete structure and a steel structure can be exerted through the combination of the concrete supporting section 1 and the steel structure cylinder section 2, so that the height of the single-cylinder type corrosion-resistant chimney can reach 60-160 m, and the application range is wide; the inner wall of the steel structure cylinder section 2 is provided with an anticorrosive coating I2.1, as shown in FIG. 6, the inner wall of the steel structure cylinder section 2 can be prevented from being corroded when smoke is discharged, and the service life of the steel structure cylinder section 2 can be prolonged; referring to fig. 4, a dust platform 1.1 connected with the first anticorrosive coating 2.1 is arranged on the top of the concrete supporting section 1, a mortar collecting pit 1.1.1 is arranged on the dust platform 1.1, and the bottom of the mortar collecting pit 1.1.1 is communicated with a mortar collecting pool 4 inside the concrete supporting section 1 through a mortar discharging pipe 3, as shown in fig. 5, for collecting dust and mortar in flue gas.

In this embodiment, the mortar collection pit 1.1.1 is surrounded by the middle beams of the mortar deposition platform 1.1, and as shown in fig. 7, the plane size is 1100mm (length) × 1100mm (width), and the maximum structural depth is 300mm to 800 mm; the mortar collecting pool 4 is a reinforced concrete rectangular pool, the clearance is 3m (length) × 3m (width) × 2.5m (depth), the pool wall thickness is 300mm, the pool bottom thickness is 350mm, the inner surfaces of the pool wall and the pool bottom of the mortar collecting pool 4 are coated with a corrosion-resistant modified polyvinyl chloride (HFVC) coating structure, the total thickness of the coating structure is 5mm, the coating structure is used for realizing the corrosion-resistant function of the mortar collecting pool 4, and the elevation of the pool top of the mortar collecting pool 4 is 300mm higher than that of a terrace in a chimney.

Referring to fig. 4, a flow guiding cushion layer 1.1.2 is arranged on the periphery of the mortar collecting pit 1.1.1, the flow guiding cushion layer 1.1.2 is arranged obliquely downwards, the gradient of the flow guiding cushion layer 1.1.2 is 5-10%, and the mortar is conveniently guided into the mortar collecting pit 1.1.1; in the embodiment, the diversion cushion layer 1.1.2 is a plain concrete cushion layer, and the thickness is not less than 50 mm; and the upper surfaces of the mortar collecting pit 1.1.1 and the diversion cushion layer 1.1.2 are respectively provided with an anticorrosive layer II 1.1.3, as shown in figure 6, for enhancing the corrosion resistance of the inner structure of the chimney.

Referring to fig. 4, an annular bracket 1.2 and an overhaul platform 1.3 placed on the annular bracket 1.2 are arranged inside the concrete supporting section 1, and the annular bracket 1.2 is of a cast-in-place reinforced concrete structure and is connected with the inner wall of the concrete supporting section 1; the maintenance platform 1.3 is positioned below the dust deposition platform 1.1 and used for maintaining the connection state of the bottom of the dust deposition platform 1.1 and the mortar discharge pipe 3, the connection state of the mortar discharge pipe 3 and the like, a maintenance manhole pipe 1.1.4 is arranged on the dust deposition platform 1.1, and a cover plate 1.1.5 is arranged on the maintenance manhole pipe 1.1.4, in the embodiment, the maintenance manhole pipe 1.1.4 penetrates through the diversion cushion layer 1.1.2, and the top of the cover plate 1.1.5 is 100-600 mm higher than the upper surface of the diversion cushion layer 1.1.2; the outer peripheral face of the inspection manhole pipe 1.1.4 is provided with a water stop ring 1.1.6 for sealing, as shown in fig. 6, the water stop ring 1.1.6 is arranged on a plane where the inspection manhole pipe 1.1.4 and the diversion cushion layer 1.1.2 are intersected, the water stop ring 1.1.6 is a stainless steel ring plate, the width between the inner ring and the outer ring of the ring plate is 50 mm-150 mm, and the thickness of the ring plate is 4 mm-6 mm.

Referring to fig. 4, the overhaul platform 1.3 includes a precast beam frame layer 1.3.1, a profiled steel sheet template layer 1.3.2 and a reinforced concrete layer 1.3.3, which are arranged from bottom to top, and the precast beam frame layer 1.3.1 is placed on the top of the annular bracket 1.2, in this embodiment, the width of the top surface of the annular bracket 1.2 is 240mm to 500mm, so that the precast beam frame layer 1.3.1 is stably supported. The steel beam model used in the precast beam frame layer 1.3.1 is HN900 multiplied by 300, the thickness of the profiled steel sheet template layer 1.3.2 is 1.2mm, and the thickness of the reinforced concrete layer 1.3.3 is 100 mm.

The maintenance platform 1.3 is provided with a mortar discharge pipe through hole 1.3.4, so that the mortar discharge pipe 3 can conveniently pass through the maintenance platform 1.3 from the bottom of the dust deposition platform 1.1 and be connected to a mortar collecting tank 4; the mortar discharge pipe 3 comprises a first discharge pipe section 3.1 and a second discharge pipe section 3.2, the starting end of the first discharge pipe section 3.1 is connected with the bottom of the mortar collection pit 1.1.1 and is in a transverse Z-shaped structure, so that a large maintenance space is formed between the mortar deposition platform 1.1 and the maintenance platform 1.3, and the mortar discharge pipe 3 is prevented from interfering maintenance personnel; referring to fig. 8, an open part 3.2.1 opposite to the end of the first discharge pipe section 3.1 is arranged at the starting end of the second discharge pipe section 3.2, the open part 3.2.1 is a funnel-shaped structure with a large upper part and a small lower part, the diameter of an upper opening is 300mm, the diameter of a lower opening is 180mm, the wall thickness is 6mm, and the total height is 350mm, so that the end of the first discharge pipe section 3.1 can conveniently extend into the open part 3.2.1, and the thermal stress generated by the end of the first discharge pipe section 3.1 due to the smoke temperature can be released while the mortar is prevented from leaking; the mortar discharge pipe 3 is made of a stainless steel pipe, the pipe diameter is 100 mm-300 mm, the pipe wall thickness is 4 mm-10 mm, the mortar discharge pipe can withstand mortar corrosion, and the stainless steel pipe used in the embodiment has the specification of phi 168 multiplied by 5 mm; the mortar discharge pipe 3 may be formed by connecting a plurality of mortar discharge pipe joints, as shown in fig. 5, in this embodiment the mortar discharge pipe joint 3.2.2 in the second discharge pipe section 3.2 is 5000mm in length.

The concrete supporting section 1 is internally provided with a plurality of embedded connectors 1.4 for fixing the mortar discharge pipe 3, in the embodiment, the embedded connectors 1.4 comprise embedded parts 1.4.1, steel support parts 1.4.2 and U-shaped hoops 1.4.3, the embedded parts 1.4.1 are arranged inside the side wall of the concrete supporting section 1 and connected with the steel support parts 1.4.2, and the mortar discharge pipe 3 is fixed on the steel support parts 1.4.2 through the U-shaped hoops 1.4.3, as shown in fig. 9. In this embodiment, the embedded part 1.4.1 is a steel embedded part 300mm (length) × 300mm (width) × 10mm (thickness), the steel supporting part 1.4.2 is made of L75 × 6 angle steel, and the U-shaped hoop 1.4.3 is made of carbon steel bars with a diameter of 20 mm.

Referring to fig. 1, the concrete support section 1 comprises a chimney foundation section 1.5, a concrete cylinder section 1.6 and a conversion transition cylinder section 1.7 which are arranged from bottom to top; in the embodiment, the chimney foundation section 1.5 is a reinforced concrete circular raft, the thickness is 1100mm, the maximum diameter is 12.8m, and the wall thickness of the upper part of the chimney foundation section 1.5 becomes thinner from bottom to top, as shown in fig. 5; the concrete cylinder section 1.6 is a circular truncated cone structure with a small top and a big bottom, the gradient of the cylinder side wall of the concrete cylinder section 1.6 is 3% -8%, and the thickness of the cylinder side wall is 240 mm-450 mm, in the embodiment, the outer diameter of the cylinder bottom of the concrete cylinder section 1.6 is 9.2m, the gradient of the cylinder is 3%, the total height of the concrete cylinder section 1.6 is 50m, the height of the concrete cylinder section 1.6 is 0-30 m, the wall thickness of the concrete cylinder section 1.6 is 450mm, and the wall thickness of the concrete cylinder section 1.6 is 400mm within the height of 30 m-50 m; the annular bracket 1.2 is arranged inside the conversion transition cylinder section 1.7, the height of the annular bracket is 1600mm, the dust deposition platform 1.1 is arranged at the top of the conversion transition cylinder section 1.7, the wall thickness of the conversion transition cylinder section 1.7 is thickened from bottom to top, the vertical section of the side wall of the conversion transition cylinder section 1.7 is in a trapezoid shape with a thin bottom and a thick top, as shown in fig. 4, the thickness of the bottom of the trapezoid is 240 mm-450 mm, and the thickness of the top of the trapezoid is 500 mm-1000 mm, and the top of the conversion transition cylinder section 1.7 supports the steel structure cylinder section 2, so that the annular bracket needs to bear larger bending moment and shearing force while bearing pressure, the wall thickness of the top of the conversion transition cylinder section 1.7 is increased, and the improvement of the stress condition of the conversion transition cylinder section 1.7 is facilitated.

Referring to fig. 2 and 3, the steel structure cylinder section 2 comprises a plurality of steel smoke exhaust pipe sections 2.2 which are detachably connected; the steel smoke exhaust pipe joint 2.2 comprises an external base material layer 2.2.1 and an annular stiffening rib 2.2.2 arranged on the outer peripheral surface of the external base material layer 2.2.1; in this embodiment, the outer substrate layer 2.2.1 is made of carbon steel or low-alloy high-strength steel, the diameter of the outer substrate layer 2.2.1 is 2500mm to 6000mm, and the wall thickness of the outer substrate layer 2.2.1 is 6mm to 25mm, in this embodiment, the annular stiffening ribs 2.2.2 on the outer peripheral surface of the outer substrate layer 2.2.1 are made of Q235 weather-resistant steel, and are used for improving the corrosion resistance of the steel smoke exhaust pipe section 2.2.

Referring to fig. 3, flanges 2.2.3 are arranged at the upper end and the lower end of each steel smoke exhaust pipe section 2.2, and are used for realizing connection between the adjacent steel smoke exhaust pipe sections 2.2 through bolts; the connecting bolt is an 8.8-grade or 10.9-grade high-strength bolt, the length of the bolt is 60-180 mm, and the diameter of the bolt is 20-32 mm.

Referring to fig. 4, the first anticorrosive coating 2.1 is disposed on the inner wall of the external substrate layer 2.2.1, the first anticorrosive coating 2.1 is made of one of a titanium steel plate, a stainless steel plate or an acid-proof brick, and the edge of the first anticorrosive coating 2.1 is connected with the edge of the second anticorrosive coating 1.1.3. When the first anticorrosive layer 2.1 is made of a titanium steel plate or a stainless steel plate, the thickness of the first anticorrosive layer 2.1 is 1 mm-2 mm, at the moment, the mortar collecting pit 1.1.1 in the dust deposition platform 1.1 and the second anticorrosive layer 1.1.3 on the upper surface of the guide cushion layer 1.1.2 are of a corrosion-resistant modified polyvinyl chloride (HFVC) coating structure or a glass Fiber Reinforced Plastic (FRP) coating structure, and the thickness of the second anticorrosive layer 1.1.3 is 5 mm-10 mm; when the material of anticorrosive coating one 2.1 is the anticorrosive inside lining of light acid-proof brick that the acid-proof brick was made, anticorrosive coating one 2.1's thickness is 50mm ~ 120mm, and the ash deposit platform 1.1 medium ash slurry collection hole 1.1.1 and the anticorrosive coating two 1.1.3 of water conservancy diversion bed course 1.1.2 upper surface are the anticorrosive inside lining system of guest gaeden this moment, select the setting of confirming anticorrosive coating two 1.1.3 according to the material of anticorrosive coating one 2.1, make the better matching of formation between anticorrosive coating two 1.1.3 and the anticorrosive coating one 2.1.

Referring to fig. 2 and 3, the steel platform 2.3, the chimney manhole 2.4, the wind break ring 2.5 and the ladder are arranged on the outer peripheral surface of the steel structure cylinder section 2. In the embodiment, three steel platforms 2.3 are arranged along the height direction of the steel structure cylinder section 2, and a steel guardrail 2.3.1 is arranged on the periphery of each steel platform 2.3 and used for guaranteeing the personal safety of maintainers; the chimney manhole 2.4 is used for enabling maintenance personnel to enter the chimney from the steel platform 2.3 for maintenance; the broken wind circle 2.5 is used for reducing the disturbance of air current to steel construction barrel section 2, and in this embodiment, the ladder includes spiral steel ladder 2.6 and straight steel ladder 2.7, and steel platform 2.3, chimney manhole 2.4, broken wind circle 2.5 and ladder all adopt Q235 resistant weathering steel to make.

The steel structure cylinder section 2 is connected with the concrete supporting section 1 through a through bolt assembly 5, and a sealing grouting layer is filled between the steel structure cylinder section 2 and the concrete supporting section 1.

In the embodiment, a conversion platform 1.7.1 used for connecting a first section of steel smoke exhaust pipe joint 2.2 is arranged on the periphery of a dust deposition platform 1.1, an outer cantilever plate of the conversion platform 1.7.1 is an annular cantilever plate, the cantilever length is 900mm, and the plate thickness is 160 mm; the conversion platform 1.7.1 is provided with a plurality of through anchor bolt sleeves 1.7.2 penetrating through the conversion platform 1.7.1 along the circumferential direction of the first section of steel smoke exhaust pipe joint 2.2, and is used for inserting the through bolt assemblies 5 into the through anchor bolt sleeves 1.7.2 to realize the connection of the first section of steel smoke exhaust pipe joint 2.2 and the conversion platform 1.7.1, wherein the through anchor bolt sleeves 1.7.2 adopt steel pipes with the specification of phi 60 × 4mm, the through bolt sleeves 1.7.2 are all positioned on a circular distribution line with the diameter of 2112mm, the circle center of the circular distribution line is positioned on the central axis of the chimney, the through bolts in the through bolt assemblies 5 are 800mm to 1900mm in length, and the bolt diameters are 24mm to 64mm, and in the embodiment, the through bolt assemblies adopt M42 through bolts made of Q345C.

The bottom of the first section of steel smoke exhaust pipe section 2.2 is provided with a circumferential stiffening flange 2.2.4, the circumferential stiffening flange is a double-layer flange, the specification of the flange is 100mm (width) multiplied by 25mm (height), a stiffening plate with the thickness of 180mm (height) multiplied by 20mm (thickness) is arranged between the double-layer flanges, and the total height of the circumferential stiffening flange is 230 mm.

After the connection between the first section of steel smoke exhaust pipe joint 2.2 and the conversion platform 1.7.1 is completed, inorganic high-strength grouting material with the strength of 80MPa is adopted in a gap between the first section of steel smoke exhaust pipe joint 2.2 and the conversion platform 1.7.1, and the thickness of the formed sealing grouting layer is 50 mm.

A construction method of a single-cylinder type corrosion-resistant chimney is used for manufacturing the single-cylinder type corrosion-resistant chimney and comprises the following steps:

the method comprises the following steps: pouring a chimney foundation section 1.5 of the concrete supporting section 1, then casting a concrete cylinder section 1.6 in a cast-in-place mode in sections, and meanwhile arranging a mortar discharge pipe 3 and a mortar collecting pool 4;

after a field is leveled, a chimney foundation pit is excavated to a designed depth, a chimney foundation section is constructed in a cast-in-place mode, and a concrete cylinder section 1.6 dowel bars are reserved at the top of the chimney foundation section 1.5; after the construction of the chimney foundation section 1.5 is finished, backfilling a chimney foundation pit, and pouring a mortar collecting pool 4 at the ground; the concrete cylinder section 1.6 is constructed by segmental cast-in-place construction by adopting a die-turning construction method or a slip-form construction method, the mortar discharge pipe 3 is arranged on the side wall of the concrete cylinder section 1.6, and the mortar discharge pipe sections 3.2.2 are connected by adopting butt welding seams.

Step two: preparing an annular bracket 1.2 in the concrete cylinder section 1.6 by cast-in-place construction, hoisting a precast beam frame layer 1.3.1 of an overhaul platform 1.3 to the annular bracket 1.2 after the concrete strength of the annular bracket 1.2 is more than or equal to 70%, horizontally paving a profiled steel sheet template layer 1.3.2 on the precast beam frame layer 1.3.1, and pouring a reinforced concrete layer 1.3.3;

specifically, an annular bracket 1.2 is cast in situ on the inner wall of a concrete cylinder section 1.6, a side wall dowel bar of a conversion transition cylinder section 1.7 is reserved on the upper part of the concrete cylinder section 1.6, after the concrete strength of the annular bracket 1.2 reaches 70%, a precast beam frame layer 1.3.1 of a hoisting maintenance platform 1.3 is hoisted to the annular bracket 1.2, a profiled steel sheet template layer 1.3.2 is horizontally laid on the precast beam frame layer 1.3.1, and a reinforced concrete layer 1.3.3 is poured;

step three: after the concrete strength of the reinforced concrete layer 1.3.3 of the overhaul platform 1.3 is more than or equal to 70 percent, the pouring of the conversion transition cylinder section 1.7 is completed;

specifically, after the concrete strength of a reinforced concrete layer 1.3.3 reaches 70%, a platform formwork is utilized to cast in situ a conversion transition cylinder section 1.7, and a through anchor bolt sleeve 1.7.2, a first discharge pipe section 3.1 of a mortar discharge pipe 3 and a manhole pipe 1.1.4 are pre-buried in the conversion platform 1.7.1 during construction of the conversion platform 1.7.1.

Step four: installing a first section of steel smoke exhaust pipe section 2.2 to the upper part of the concrete supporting section 1, pouring a dust deposition platform 1.1 on the top of the conversion transition cylinder section 1.7, and completing the setting of an anticorrosive coating II 1.1.3; then, a plurality of sections of steel smoke exhaust pipe sections 2.2 are sequentially arranged above the first section of steel smoke exhaust pipe section 2.2 to form a steel structure cylinder section 2;

specifically, the steel smoke exhaust pipe sections 2.2 are manufactured on the ground in a segmented mode, and the anticorrosive coating I2.1 and steel smoke exhaust cylinder accessories (a steel platform 2.3, a chimney manhole 2.4, a wind breaking ring 2.5, a ladder and the like) in each steel smoke exhaust pipe section 2.2 are manufactured and installed on the ground. After the strength of the concrete of the conversion platform 1.7.1 reaches 90%, a crawler crane is adopted, a first section of steel smoke exhaust pipe joint 2.2 is hoisted firstly and placed on the conversion platform 1.7.1, a circumferential stiff flange 2.2.4 at the bottom of the first section of steel smoke exhaust pipe joint 2.2 is matched with a circumferentially distributed opposite-penetrating anchor bolt sleeve 1.7.2 in place, an opposite-penetrating bolt assembly 5 is installed, after the verticality of the first section of steel smoke exhaust pipe joint 2.2 is straightened, the opposite-penetrating bolt assembly 5 is fastened, then high-strength secondary grouting material is adopted, and the gap between the circumferential stiff flange 2.2.4 and the conversion platform 1.7.1 is grouted and leveled. Then, pouring a dust deposition platform 1.1 on the top of the conversion transition cylinder section 1.7, and finishing the arrangement of an anticorrosive coating II 1.1.3; and other sections of the steel smoke discharging cylinder body section 2 are sequentially provided with a 300T crawler crane, a crane is arranged on the section below, and the sections of the steel smoke discharging cylinder body section 2 are connected by adopting flanges and bolts to realize fastening connection.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A single-cylinder type corrosion-resistant chimney is characterized by comprising a concrete support section (1) and a steel structure cylinder section (2) which are arranged from bottom to top; steel construction barrel section (2) inner wall is equipped with anticorrosive coating one (2.1), concrete support section (1) top be equipped with deposition platform (1.1) that anticorrosive coating one (2.1) are connected, be equipped with mortar on deposition platform (1.1) and collect hole (1.1.1), mortar is collected the bottom in hole (1.1.1) and is passed through mortar discharge pipe (3) and concrete support section (1) inside mortar collecting pit (4) intercommunication.

2. The mono-tube type anti-corrosion chimney according to claim 1, characterized in that the periphery of the mortar collecting pit (1.1.1) is provided with a diversion cushion layer (1.1.2), and the slope of the diversion cushion layer (1.1.2) is 5-10%; and the upper surfaces of the mortar collecting pit (1.1.1) and the diversion cushion layer (1.1.2) are provided with a second anticorrosive layer (1.1.3).

3. Single-tube corrosion-resistant chimney according to claim 1 or 2, characterized in that the concrete supporting section (1) is internally provided with a ring bracket (1.2) and an inspection platform (1.3) placed on the ring bracket (1.2); the maintenance platform (1.3) is positioned below the dust deposition platform (1.1), a maintenance manhole pipe (1.1.4) is arranged on the dust deposition platform (1.1), and a cover plate (1.1.5) is arranged on the maintenance manhole pipe (1.1.4); and a water stop ring (1.1.6) for sealing is arranged on the peripheral surface of the manhole pipe (1.1.4).

4. The mono-tube type corrosion-resistant chimney according to claim 3, characterized in that the maintenance platform (1.3) comprises a precast beam frame layer (1.3.1), a profiled steel sheet formwork layer (1.3.2) and a reinforced concrete layer (1.3.3) from bottom to top, and the precast beam frame layer (1.3.1) is placed on top of the annular bracket (1.2).

5. Single-tube corrosion-resistant chimney according to claim 3, characterized in that the maintenance platform (1.3) is provided with mortar discharge pipe through holes (1.3.4); the mortar discharge pipe (3) comprises a first discharge pipe section (3.1) and a second discharge pipe section (3.2), the starting end of the first discharge pipe section (3.1) is connected with the mortar collecting pit (1.1.1), and the starting end of the second discharge pipe section (3.2) is provided with an open part (3.2.1) opposite to the tail end of the first discharge pipe section (3.1); the concrete support section (1) is internally provided with a plurality of pre-embedded connecting pieces (1.4) for fixing the mortar discharge pipe (3).

6. Monotubular corrosion-resistant chimney according to claim 4, characterized in that the concrete support section (1) comprises, from bottom to top, a chimney base section (1.5), a concrete cylinder section (1.6) and a transition cylinder section (1.7); the concrete cylinder section (1.6) is of a circular truncated cone structure with a small top and a big bottom, the gradient of the side wall of the cylinder of the concrete cylinder section (1.6) is 3-8%, and the thickness of the side wall of the cylinder is 240-450 mm; annular bracket (1.2) set up inside conversion transition barrel section (1.7), deposition platform (1.1) set up in conversion transition barrel section (1.7) top, the wall thickness of conversion transition barrel section (1.7) is by lower-to-upper bodiness.

7. Single-tube corrosion-resistant chimney according to claim 6, characterized by the fact that the steel structural tube section (2) comprises several sections of steel fume extraction tube segments (2.2) detachably connected; the steel smoke exhaust pipe joint (2.2) comprises an outer base material layer (2.2.1) and an annular stiffening rib (2.2.2) arranged on the outer peripheral surface of the outer base material layer (2.2.1); the first anti-corrosion layer (2.1) is arranged on the inner wall of the external base material layer (2.2.1), and the first anti-corrosion layer (2.1) is made of one of a titanium steel plate, a stainless steel plate or an acid-proof brick.

8. Single-cylinder corrosion-resistant chimney according to claim 7, characterized by that, the steel structure cylinder section (2) is provided with steel platform (2.3), chimney manhole (2.4), wind-break ring (2.5) and ladder on the outer circumference.

9. The mono-tube anti-corrosion chimney according to claim 8, characterized in that the steel structure tube section (2) is connected with the concrete support section (1) through a through bolt assembly (5), and a sealing grouting layer is filled between the steel structure tube section (2) and the concrete support section (1).

Images