CN211575071U

CN211575071U - Raw coke oven gas high temperature waste heat recovery device

Info

Publication number: CN211575071U
Application number: CN201922191524.4U
Authority: CN
Inventors: 葛霖
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-09-25
Anticipated expiration: 2029-12-09

Abstract

The utility model relates to a raw coke oven gas high temperature waste heat recovery device, it includes waste heat recovery tedge, circulating water pump (5) and steam pocket (6), the waste heat recovery tedge includes tedge pipe wall heat taker (1) and riser in heat taker (3), circulating water pump (5) water inlet passes through pipe connection steam pocket (6), water main (7) are connected to circulating water pump (5) delivery port, water main (7) are connected with pipe wall heat taker water inlet (1-4-4) of each riser pipe wall heat taker (1) respectively through a plurality of parallelly connected water supply branch pipes, and pipe wall heat taker return water mouth (1-4-5) of each riser pipe wall heat taker are connected to return water house steward (8) through a plurality of parallelly connected return water branch pipes respectively. The utility model discloses when whole tedders are used for producing high pressure saturated steam, can loopback the high pressure saturated steam of production to the interior heat collector production superheated steam of tedge, can realize that the maximize improves the waste heat recovery efficiency of raw coke oven gas.

Description

Raw coke oven gas high temperature waste heat recovery device

Technical Field

The utility model relates to a raw coke oven gas high temperature waste heat recovery device, mainly used coke oven raw coke oven gas waste heat recovery belongs to thermal technology energy-conserving (boiler) technical field.

Background

The coking coal is heated and dry distilled by a plurality of isolated air in a coke oven to generate coke, simultaneously, a large amount of volatile matters are volatilized to generate raw coke gas, the coke oven is formed by a plurality of dry distillation chambers (carbonization chambers) in parallel, each carbonization chamber is provided with one or two ascending pipes, the coke oven raw coke gas with sensible heat accounting for about 36 percent of the heat of the coke oven is taken out by the carbonization chamber at 850 ℃ and is sent into a bridge pipe through the ascending pipes, a large amount of high-pressure ammonia water is sprayed on the bridge pipe, the temperature of the raw coke gas is rapidly reduced to about 80 ℃ after the ammonia water is vaporized, the high-temperature heat of the raw coke gas is wasted and consumes a large amount of ammonia water and mechanical energy recycled by the ammonia water, and in order to recycle the high-temperature waste heat of the raw coke gas, the raw coke gas waste heat recovery ascending pipes are popularized and applied to the. The high-temperature sensible heat of the raw gas is high-quality energy, a plurality of technologies are developed at home and abroad for recovering waste heat for the high-quality sensible heat brought by the raw gas of the coke oven, a typical structure is provided with a jacket, and a jacket and coil type (such as a coke oven riser waste heat recovery device, the patent number is ZL201410051124.2), an internal insertion type (such as the patent number is 201410309838.9) and a spiral coil type structure are developed for solving the problems of water leakage, low reliability and the like of the jacket structure. The method for recovering the waste heat of the raw gas of the coke oven usually produces saturated steam, and the method for producing superheated steam comprises the following steps: saturated steam produced by a part of ascending pipes of the whole furnace and superheated steam produced by the rest ascending pipes are separated from raw gas through a steam pocket after working medium water in a heat collector on the pipe wall of the part ascending pipes or an inserted heat collector exchanges heat, and then the part of saturated steam is sent to the ascending pipes specially producing the superheated steam for steam superheating, so that the heat transfer and heat exchange between the saturated steam and the raw gas are obviously realized, and the waste heat recovery efficiency of the raw gas is obviously reduced.

In general, the problems encountered with current riser waste heat recovery are:

1. any waste heat recovery method does not solve the problem of recovering high-temperature waste heat of the high-temperature raw gas outside the boundary layer of the wall end of the heat collector in the ascending pipe, namely the heat of the raw gas in the boundary layer thickness area of the waste heat recovery heat exchanger is only recovered by the existing raw gas waste heat recovery method, and the heat of the raw gas in the area outside the boundary layer thickness cannot be recovered and utilized;

2. the superheated steam can not be produced when all the ascending pipes are used for producing saturated steam, if the superheated steam needs to be produced, part of the ascending pipes are stopped to produce the saturated steam, the superheated steam is produced instead, so that the part has lower efficiency, more waste of the waste heat of the raw gas which is recycled originally is caused, and the efficiency of the waste heat recovery of the ascending pipes which is originally low in efficiency is reduced;

3. when the temperature of the raw gas is lower than 450 ℃, coking begins, and the coking brings hidden danger to safe production;

4. the high-temperature raw gas has serious high-temperature corrosivity, and the metal exposed out of the raw gas can cause rapid high-temperature corrosion;

5. the waste heat recovery of the crude gas riser can only produce low-medium pressure steam, so that the high-quality waste heat of the crude gas can only be recycled at low quality, the energy efficiency of the high-quality crude gas waste heat is wasted, and the waste heat recovery method is waste recovery of the high-quality waste heat resource of the crude gas.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a raw coke oven gas high temperature waste heat recovery device is provided to above-mentioned prior art, it is when all ascending pipes are used for producing high-pressure saturated steam, can loopback the high-pressure saturated steam of production to the interior heat collector production superheated steam of ascending pipe, has improved the waste heat recovery efficiency of raw coke oven gas greatly.

The utility model provides a technical scheme that above-mentioned problem adopted does: a raw coke oven gas high-temperature waste heat recovery method comprises the following steps: raw coke gas from each carbonization chamber of the coke oven is respectively introduced into raw coke gas channels of respective waste heat recovery ascending pipes, each waste heat recovery ascending pipe comprises a riser pipe wall heat collector and an ascending pipe inner heat collector arranged in the riser pipe wall heat collector, and the riser pipe inner heat collector is inserted into the difference between the inner diameter Di of the riser pipe wall heat collector and the outer diameter do of the riser pipe inner heat collector: the water inlet of a circulating water pump is connected with a steam pocket, the water outlet of the circulating water pump is connected with a water supply main pipe, the water supply main pipe respectively conveys water to the water inlets of pipe wall heat extractors of the riser pipe wall heat extractors through a plurality of water supply branch pipes which are connected in parallel, steam water formed after heat exchange between the riser pipe wall heat extractors and raw gas flows out of the water return ports of the pipe wall heat extractors of the riser pipe wall heat extractors and is collected to a water return main pipe through a plurality of water return branch pipes which are connected in parallel, the steam water is conveyed to the steam pocket through a water return main pipe, saturated steam is separated in the steam pocket, the saturated steam separated from the top of the steam pocket is conveyed to a steam supply main pipe through the steam pocket self pressure, the saturated steam is respectively conveyed to the steam inlets of the internal heat extractors in the riser pipe through a plurality of steam supply branch pipes which are connected in parallel, superheated steam formed after heat exchange between the riser pipe heat extractors and the raw gas flows out of the internal heat extractors in the riser pipe and the steam The branch pipes are collected to a superheated steam conveying pipe and then conveyed to a required position through the superheated steam conveying pipe.

A raw coke oven gas high-temperature waste heat recovery method comprises the following steps: raw coke gas from each carbonization chamber of the coke oven is respectively introduced into raw coke gas channels of respective waste heat recovery ascending pipes, each waste heat recovery ascending pipe comprises a riser pipe wall heat collector and an ascending pipe inner heat collector arranged in the riser pipe wall heat collector, and the riser pipe inner heat collector is inserted into the difference between the inner diameter Di of the riser pipe wall heat collector and the outer diameter do of the riser pipe inner heat collector: di-do is more than or equal to 200mm in the central area, the water inlet of the circulating water pump is connected with the steam pocket, the water outlet of the circulating water pump is connected with the water supply main pipe, the water supply main pipe respectively conveys water to the water inlet of the pipe wall heat extractor of each ascending pipe wall heat extractor and the water inlet of the inner heat extractor of each ascending pipe wall heat extractor through a plurality of water supply branch pipes which are connected in parallel, steam water formed after heat exchange between the ascending pipe wall heat extractor and the raw gas by the ascending pipe wall heat extractor and the ascending pipe wall heat extractor is collected to the water return main pipe through a plurality of water return branch pipes which are connected in parallel after coming out from the water return port of the pipe wall heat extractor of each ascending pipe wall heat extractor and the water return port of the, and (3) separating saturated steam from the steam drum, conveying the saturated steam separated from the top of the steam drum into a saturated steam conveying pipe under self pressure, and conveying the saturated steam to a required position through a supersaturated steam conveying pipe.

A raw coke oven gas high-temperature waste heat recovery device comprises a waste heat recovery ascending pipe, a circulating water pump and a steam pocket, wherein the waste heat recovery ascending pipe comprises an ascending pipe wall heat extractor and an ascending pipe inner heat extractor arranged in the ascending pipe wall heat extractor, the ascending pipe wall heat extractor comprises a pipe wall heat extractor water inlet and a pipe wall heat extractor water return port, the ascending pipe inner heat extractor comprises an inner heat extractor steam inlet and an inner heat extractor steam return port, the circulating water pump water inlet is connected with the steam pocket through a pipeline, the circulating water pump water outlet is connected with a water supply main pipe, the water supply main pipe is respectively connected with the pipe wall heat extractor water inlets of the ascending pipe wall heat extractors through a plurality of water supply branch pipes which are connected in parallel, the pipe wall heat extractor water return ports of the ascending pipe wall heat extractors are respectively connected to a water return main pipe through a plurality of water return branch pipes which are connected in parallel, the water return main pipe is connected with the steam pocket, the main steam supply pipe is connected with the steam inlets of the inner heat collectors of the heat collectors in the ascending pipes through a plurality of parallel branch steam supply pipes, the steam return ports of the inner heat collectors of the heat collectors in the ascending pipes are connected to the superheated steam conveying pipe through a plurality of parallel branch steam return pipes, and the superheated steam conveying pipe conveys the superheated steam to a required position.

A raw coke oven gas high-temperature waste heat recovery device comprises a waste heat recovery ascending pipe, a circulating water pump and a steam pocket, wherein the waste heat recovery ascending pipe comprises an ascending pipe wall heat collector and an ascending pipe inner heat collector arranged in the ascending pipe wall heat collector, the ascending pipe wall heat collector comprises a pipe wall heat collector water inlet and a pipe wall heat collector water return port, the ascending pipe inner heat collector comprises an inner heat collector water inlet and an inner heat collector water return port, the circulating water pump water inlet is connected with the steam pocket through a pipeline, the circulating water pump water outlet is connected with a water supply main pipe, the water supply main pipe is respectively connected with the pipe wall heat collector water inlet of each ascending pipe wall heat collector and the inner heat collector water inlet of each ascending pipe inner heat collector through a plurality of water supply branch pipes which are connected in parallel, the pipe wall heat collector water return port of each ascending pipe wall heat collector and the inner heat collector water return port of each ascending pipe inner heat collector are respectively connected to a water, the water return main pipe is connected with the steam drum, a saturated steam outlet of the steam drum is connected with a saturated steam conveying pipe, and the saturated steam is conveyed to a required position by the steam conveying pipe.

Preferably, the difference between the inner diameter Di of the heat remover inserted into the riser wall and the outer diameter do of the heat remover in the riser is as follows: di-do is more than or equal to 200mm in the central area.

Preferably, the heat taker in the tedge includes the multiunit heat exchange tube, the heat exchange tube adopts bushing type structure, and bushing type heat exchange tube includes tubule (core pipe) and thick pipe (outer tube), the outer tube lower extreme seals, tubule (core pipe) lower extreme opening, tubule (core pipe) lower extreme cartridge is provided with tubule collecting tube and thick pipe collecting tube in thick pipe (outer tube), and multiunit heat exchange tube upper end periphery is provided with tubule collecting tube and thick pipe collecting tube, and tubule (core pipe) upper end of multiunit heat exchange tube all is linked together with tubule (core pipe) collecting tube, and thick pipe (outer tube) upper end of multiunit heat exchange tube all is linked together with the outer tube collecting tube, be provided with interior heat taker admission mouth of a river on tubule (core pipe) collecting tube, be provided with.

Preferably, the heat taker in the riser includes the multiunit heat exchange tube, the heat exchange tube adopts snakelike tubular structure, and snakelike tubular heat exchange tube includes tubule and thick pipe, the tubule is concatenated in thick pipe through big small end reducing, and multiunit heat exchange tube upper end periphery is provided with tubule collecting tube and thick pipe collecting tube, and the tubule upper end of multiunit heat exchange tube all is linked together with the tubule collecting tube, and the thick pipe upper end of multiunit heat exchange tube all is linked together with the thick pipe collecting tube, be provided with interior heat taker admission mouth of a river on the tubule collecting tube, be provided with interior heat taker return-steam mouth of a river on the thick pipe.

Preferably, the thin tubes and the thick tubes of the same group of heat exchange tubes are arranged in a circumferential direction or in a radial direction.

Preferably, the diameters of the thin tubes (core tubes) of the multiple groups of heat exchange tubes are DN 15-DN 40, the diameters of the thick tubes (outer tubes) of the multiple groups of heat exchange tubes are DN 40-DN 66, the multiple groups of heat exchange tubes in the central area of the ascending tube with Di-do not less than 200mm are selected, and the heat exchange tube groups with the number of 3 to 12 groups are selected, so that the heat exchange area is increased to the maximum in the limited space.

Preferably, the lower part of the waste heat recovery riser is spirally, tangentially and obliquely downwards provided with a sulfur-containing sewage pyrolysis treatment pipe orifice, and an outlet of the sulfur-containing sewage pyrolysis treatment pipe orifice is inserted into a riser pipe seat; the end part of the sulfur-containing sewage pyrolysis treatment pipe orifice inserted into the ascending pipe seat is provided with an inclined plane opening, and the inclined plane opening faces to the center of the ascending pipe seat.

Preferably, the surfaces of the pipe wall heat remover of the ascending pipe, the heat remover in the ascending pipe and the pipe orifice of the pyrolysis treatment of the sulfur-containing sewage, which are exposed and raw coke oven gas, are coated with anticorrosive coatings, and the temperature of the contact surfaces of the pipe wall heat remover of the ascending pipe, the heat remover in the ascending pipe and the raw coke oven gas is controlled to be more than or equal to 450 ℃ by the thickness of the anticorrosive coatings.

Compared with the prior art, the utility model has the advantages of:

1. the utility model is provided with a pipe wall waste heat recoverer and a heat collector structure in the riser, which are suitable for the distribution of the temperature field formed by the flow state of the crude gas and are adaptive to each other, according to the characteristics of the flow state distribution of the crude gas in the riser, thereby realizing the maximum recovery of the waste heat of the crude gas;

2. the utility model can produce high-pressure superheated steam while producing high-pressure saturated steam by all the ascending pipes simultaneously, thereby realizing high-quality waste heat recovery of sensible heat of high-temperature raw coke oven gas; or all the ascending pipes can simultaneously produce high-pressure saturated steam, and all the raw gas waste heat except the boundary layer thickness in the raw gas waste heat recovery process can be recovered, so that the high-pressure saturated steam can be produced to the maximum extent, and the high-quality and high-efficiency waste heat recovery utilization of the sensible heat of the high-temperature raw gas can be realized;

3. the utility model eliminates the technical bottleneck of the waste heat recovery of the raw gas caused by high-temperature corrosion by completely realizing full ceramic coverage on the exposed metal surface which can be exposed on the raw gas side; meanwhile, the thermal resistance is increased, the condition that the coking of the raw gas is lower than 450 ℃ is eliminated, the raw gas is not coked while the waste heat is recovered, and the labor intensity of the riser maintenance is reduced;

4. the utility model adopts the combination of the spiral tube heat collector and the sleeve type inner heat collector, the stress state is coordinated, the additional stress in the processing and using process is eliminated, and the reliability and the safety of the equipment are obviously improved;

5. the utility model discloses can utilize the whole pyrolytic treatment coke oven of tedge raw coke oven gas high temperature waste heat to contain sulphur sewage, eliminate the difficult technical bottleneck who handles of sulphur sewage, reduce the coke oven and contain the sulphur sewage treatment cost to can the resource recovery sulphur.

Drawings

Fig. 1 is a schematic view of an embodiment 1 of a method and a device for recovering high-temperature waste heat of raw coke oven gas of the present invention.

Fig. 2 is a schematic view of an embodiment 2 of the raw coke oven gas high-temperature waste heat recovery method and device of the present invention.

Fig. 3 is a schematic view of the waste heat recovery riser pipe of fig. 1 or 2.

Fig. 4 is a bottom view of fig. 3.

FIG. 5 is a schematic structural view of the spiral tube heat extractor of FIG. 3.

Fig. 6 is a bottom view of fig. 5.

FIG. 7 is a schematic view of an embodiment of the heat collector in the riser of FIG. 3.

Fig. 8 is a bottom view of fig. 7.

FIG. 9 is a schematic view of another embodiment of the internal heat collector of the riser of FIG. 3.

Fig. 10 is a bottom view of fig. 9.

FIG. 11 is a schematic view of a still further embodiment of the heat collector in the riser of FIG. 3.

Fig. 12 is a bottom view of fig. 11.

Wherein:

riser pipe wall heat collector 1

Ascending pipe barrel 1-1

Riser pipe upper flange 1-2

Lower flange 1-3 of ascending pipe

Spiral tube heat collector 1-4

Spiral tube barrel 1-4-1

Upper manifold 1-4-2

Lower collecting pipe 1-4-3

Water inlet 1-4 of tube wall heat collector

Pipe wall heat collector return water port 1-4-5

1-5 of heat insulation layer

Bridge pipe tee 2

Heat collector in riser 3

Inner heat collector barrel 3-1

Upper flange 3-2 of inner heat collector

Lower flange 3-3 of internal heat collector

Guide sliding support 3-4

Heat exchange tubes 3-5

Tubule 3-5-1

Thick pipe 3-5-2

Reducer 3-5-3

Tubule collecting ducts 3-6

Thick pipe collecting pipe 3-7

Steam inlet/water outlet 3-8 of internal heat collector

Return steam/water gap 3-9 of internal heat collector

Spiral sheet 3-10

Riser water seal cover 4

Circulating water pump 5

Steam pocket 6

Water supply main pipe 7

Return water main pipe 8

Steam supply main pipe 9

Superheated steam transfer pipe 10

Saturated steam conveying pipe 11

Riser base 12

The sulfur-containing sewage pyrolysis treatment pipe orifice 13.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Example 1: production of superheated steam by using high-temperature waste heat of raw gas

The utility model relates to a method for producing superheated steam by using high-temperature waste heat of raw coke oven gas, which comprises the following steps:

raw gas from each carbonization chamber of the coke oven is respectively introduced into a raw gas circulation channel of each waste heat recovery riser, the waste heat recovery riser comprises a riser wall heat collector and a riser heat collector arranged in the riser, the raw gas exchanges heat and heat with the riser wall heat collector and the riser heat collector arranged in the riser in the raw gas channel of the riser, a water inlet of a circulating water pump is connected with a steam drum, a water outlet of the circulating water pump is connected with a water supply main pipe, the water supply main pipe respectively conveys water to water inlets of the riser wall heat collectors of each riser wall heat collector through a plurality of water supply branch pipes connected in parallel, steam water formed after heat exchange of the riser wall heat collectors flows out from water return ports of the riser wall heat collectors of each riser wall heat collector, is collected to a water return main pipe through a plurality of water return branch pipes connected in parallel and then is conveyed to the steam drum through the water return main pipe, separating saturated steam from the steam pocket, feeding the saturated steam separated from the top of the steam pocket into a steam feeding main pipe through the pressure of the steam pocket, respectively conveying the saturated steam to steam inlets of inner heat collectors of heat collectors in the ascending pipes by the steam feeding main pipe through a plurality of parallel steam feeding branch pipes, collecting superheated steam formed after heat exchange of the heat collectors in the ascending pipes to a superheated steam conveying pipe through a plurality of steam return branch pipes after the superheated steam comes out of the steam outlets of the inner heat collectors of the heat collectors in the ascending pipes, and conveying the superheated steam to a required position through the superheated steam conveying pipe;

the riser pipe wall heat collector is preferably but not limited to a spiral spring type structure, and the spiral spring type structure is reasonable in stress and can automatically coordinate and eliminate additional stress in the operation process; the surfaces of the heat remover in the ascending pipe and the heat remover on the wall of the ascending pipe are coated with anticorrosive coatings, the anticorrosive coatings eliminate the high-temperature corrosion of crude gas to metal exposed in the anticorrosive coatings, the thickness of the anticorrosive coatings is adjusted to control the temperature of the contact layer surface of the anticorrosive coatings and the crude gas to be more than or equal to 450 ℃, and the technical bottleneck that the crude gas starts to coke in a large area when the temperature is lower than 450 ℃ is prevented. With the development of anticorrosive coatings and other technologies, the lower limit of 450 ℃ can be broken through to about 300 ℃ in the future.

Referring to fig. 1, the utility model relates to a device for producing superheated steam by using high-temperature waste heat of raw coke oven gas, which comprises a waste heat recovery riser, a circulating water pump 5 and a steam pocket 6, wherein the waste heat recovery riser comprises a riser pipe wall heat collector 1, a bridge pipe tee joint 2, a riser pipe heat collector 3 and a riser pipe water sealing cover 4 which are sequentially arranged from bottom to top, the riser pipe wall heat collector 1 comprises a pipe wall heat collector water inlet 1-4-4 and a pipe wall heat collector water return port 1-4-5, the riser pipe heat collector 3 comprises an inner heat collector steam inlet 3-8 and an inner heat collector steam return port 3-9, the circulating water pump 5 water inlet is connected with the steam pocket 6 through a pipeline, the circulating water pump 5 water outlet is connected with a water supply main pipe 7, the water supply main pipe 7 is respectively connected with the heat collector water inlets 1-4-4 of the pipe walls of the riser pipe wall heat collectors 1 through a plurality of parallel water supply branch pipes, the pipe wall heat collector return water ports 1-4-5 of each ascending pipe wall heat collector are respectively connected to a return water main pipe 8 through a plurality of return water branch pipes connected in parallel, the return water main pipe 8 is connected with a steam drum 6, a saturated steam outlet at the top of the steam drum 6 is connected with a steam supply main pipe 9, the steam supply main pipe 9 is respectively connected with the inner heat collector steam inlet ports 3-8 of the heat collectors 3 in each ascending pipe through a plurality of steam supply branch pipes connected in parallel, the inner heat collector steam inlet ports 3-9 of the heat collectors 3 in each ascending pipe are respectively connected to a superheated steam conveying pipe 10 through a plurality of steam return branch pipes connected in parallel, and the superheated steam conveying pipe 10 conveys superheated steam to a required position.

The heat collector 3 in the ascending pipe is inserted in the difference between the inner diameter Di of the heat collector 1 on the pipe wall of the ascending pipe and the outer diameter do of the heat collector 3 in the ascending pipe: di-do is more than or equal to 200mm in the central area. Experimental research shows that the thickness of the boundary layer of the riser pipe wall heat collector is about 100mm, in order to not influence the heat collecting and heat transferring power of the pipe wall heat collector, high-temperature raw gas in the area except the thickness of the boundary layer of the pipe wall heat collector in the central area with Di-do larger than or equal to 200mm is selected, and an internal heat collector is adopted to recover waste heat in the partial area without waste heat recovery, so that the heat exchange utilization of all heat sources of the flow section of the raw gas of the whole riser can be realized.

Example 2: maximum production of saturated steam by using high-temperature waste heat of raw gas

The utility model relates to a method for maximizing production of saturated steam by utilizing high-temperature waste heat of raw coke oven gas, which comprises the following steps:

raw gas from each carbonization chamber of the coke oven is respectively introduced into a raw gas circulation channel of each waste heat recovery riser, the waste heat recovery riser comprises a riser wall heat collector and a riser heat collector arranged in the riser, the raw gas exchanges heat and heat with the riser wall heat collector and the riser heat collector arranged in the riser in the raw gas channel of the riser, a water inlet of a circulating water pump is connected with a steam drum, a water outlet of the circulating water pump is connected with a water supply main pipe, the water supply main pipe respectively conveys water to a pipe wall heat collector water inlet of each riser wall heat collector and an internal heat collector water inlet of each riser heat collector through a plurality of parallel water supply branch pipes, steam water formed after heat exchange of the riser wall heat collector and the riser heat collector flows out from a pipe wall heat collector water return port of each riser wall heat collector and an internal heat collector water return port of each riser heat collector and then is respectively collected to a water return main pipe through a plurality of parallel water return branch pipes, the steam and water are conveyed to a steam drum through a water return main pipe for steam-water separation, and saturated steam separated from the steam drum is conveyed into a saturated steam conveying pipe from the top of the steam drum through the pressure of the steam drum and then conveyed to a required position through a supersaturated steam conveying pipe;

the riser tube wall heat remover is preferably but not limited to a coil spring type structure; the spiral tube spring type structure is reasonable in stress and can automatically coordinate and eliminate additional stress in the operation process; the surfaces of the heat remover in the ascending pipe and the heat remover on the wall of the ascending pipe are coated with anticorrosive coatings, the anticorrosive coatings eliminate the high-temperature corrosion of crude gas to metal exposed in the anticorrosive coatings, the thickness of the anticorrosive coatings is adjusted to control the interface temperature between the anticorrosive coatings and the crude gas to be more than or equal to 450 ℃, and the technical bottleneck that the crude gas starts to coke in a large area when the temperature is lower than 450 ℃ is prevented. With the development of the anticorrosive coating technology, the lower limit of 450 ℃ can be broken through to about 300 ℃ in the future.

Referring to fig. 2, the utility model relates to an utilize device of raw coke oven gas high temperature waste heat maximize production saturated steam, it includes waste heat recovery tedge, circulating water pump 5 and steam pocket 6, waste heat recovery tedge includes tedge pipe wall heat collector 1, bridgepipe tee bend 2, heat collector 3 in the tedge and tedge water sealing lid 4 that arrange in proper order from bottom to top, tedge pipe wall heat collector 1 includes pipe wall heat collector water inlet 1-4-4 and pipe wall heat collector return water mouth 1-4-5, heat collector 3 includes interior heat collector water inlet 3-8 and interior heat collector return water mouth 3-9 in the tedge, circulating water pump 5 water inlet passes through pipe connection steam pocket 6, circulating water pump 5 delivery port is connected to water header 7, water header 7 respectively with pipe wall heat collector water inlet 1-4-4 and each rising of each tedge pipe wall heat collector 1 through a plurality of parallelly connected feedwater branch pipes The water inlet 3-8 of the inner heat collector of the in-pipe heat collector 3 is connected, the water return ports 1-4-5 of the pipe wall heat collectors 1 of the ascending pipes and the water return ports 3-9 of the inner heat collectors of the pipe wall heat collectors 3 of the ascending pipes are respectively connected to a water return main pipe 8 through a plurality of water return branch pipes connected in parallel, the water return main pipe 8 is connected with a steam drum 6, the saturated steam outlet of the steam drum 6 is connected with a saturated steam conveying pipe 11, and the steam conveying pipe 11 conveys the saturated steam to a required position.

The heat collector 3 in the ascending pipe is inserted in the difference between the inner diameter Di of the heat collector 1 on the pipe wall of the ascending pipe and the outer diameter do of the heat collector 3 in the ascending pipe: di-do is more than or equal to 200mm in the central area. Experimental research shows that the thickness of the boundary layer of the riser pipe wall heat collector is about 100mm, in order to not influence the heat collecting and heat transferring power of the pipe wall heat collector, high-temperature raw gas in the area, except the thickness of the boundary layer of the pipe wall heat collector, in the central area with Di-do larger than or equal to 200mm is selected, and the partial area without waste heat recovery is also selected, the inner heat collector is adopted for waste heat recovery, and therefore the heat exchange utilization of all heat sources of the flowing section of the raw gas of the whole riser can be achieved.

Referring to fig. 3 to 6, the waste heat recovery riser comprises a riser pipe seat 12, wherein a riser pipe wall heat extractor 1, a bridge pipe tee joint 2, a riser pipe heat extractor 3 and a riser pipe water sealing cover 4 are sequentially arranged on the riser pipe seat 12 from bottom to top, and the riser pipe heat extractor 3 is inserted into the riser pipe wall heat extractor 1 through the bridge pipe tee joint 2;

the riser pipe wall heat remover 1 comprises a riser pipe barrel 1-1, riser pipe upper flanges 1-2 and riser pipe lower flanges 1-3 are respectively arranged at the upper end and the lower end of the riser pipe barrel 1-1, a spiral pipe heat remover 1-4 is arranged in the riser pipe barrel 1-1, a heat insulation layer 1-5 is arranged between the riser pipe barrel 1-1 and the spiral pipe heat remover 1-4, the riser pipe upper flanges 1-2 are connected with the lower end of a bridge pipe tee joint 2, and the riser pipe lower flanges 1-3 are connected with a riser pipe seat 12;

the spiral tube heat collector 1-4 comprises a spiral tube barrel 1-4-1 made of a multi-path coil tube, the upper end and the lower end of the spiral tube barrel 1-4-1 are respectively provided with an upper collecting tube 1-4-2 and a lower collecting tube 1-4-3, the upper end and the lower end of the multi-path coil tube of the spiral tube barrel 1-4-1 are respectively communicated with the upper collecting tube 1-4-2 and the lower collecting tube 1-4-3, the upper collecting tube 1-4-2 is provided with a tube wall heat collector water return port 1-4-5, and the lower collecting tube 1-4-3 is provided with a tube wall heat collector water inlet 1-4-4;

the inner and outer surfaces of the spiral tube barrel 1-4-1, the upper collecting tube 1-4-2 and the lower collecting tube 1-4-3 are coated with anticorrosive ceramic layers;

referring to fig. 7 and 8, the riser internal heat collector 3 in the embodiment includes an internal heat collector cylinder 3-1, an internal heat collector upper flange 3-2 and an internal heat collector lower flange 3-3 are respectively arranged at the upper end and the lower end of the internal heat collector cylinder 3-1, the internal heat collector lower flange 3-3 is connected with the upper end of a bridge pipe tee joint 2, and the internal heat collector upper flange 3-2 is connected with a riser water sealing cover 4;

an upper guide sliding support 3-4 and a lower guide sliding support 3-4 are arranged below the inner heat collector barrel body 3-1, a plurality of groups of heat exchange tubes 3-5 are arranged between the upper guide sliding support 3-4 and the lower guide sliding support 3-4, the heat exchange tubes 3-5 adopt a sleeve type structure, the sleeve type heat exchange tubes 3-5 comprise a thin tube (core tube) 3-5-1 and a thick tube (outer tube) 3-5-2, the thin tube (core tube) 3-5-1 is a steam supply tube, the thick tube (outer tube) 3-5-2 is a heat taking tube, the lower end of the thick tube (outer tube) 3-5-2 is sealed, the lower end of the thin tube (core tube) 3-5-1 is opened, the lower end of the thin tube (core tube) 3-5-1 is inserted into the thick tube (outer tube) 3-5-2, and a thin tube (core tube) collecting The system comprises a thick pipe (outer pipe) collecting pipe 3-7, wherein the upper ends of thin pipes (core pipes) 3-5-1 of a plurality of groups of heat exchange pipes 3-5 are communicated with a thin pipe (core pipe) collecting pipe 3-6, the upper ends of thick pipes (outer pipes) 3-5-2 of a plurality of groups of heat exchange pipes 3-5 are communicated with a thick pipe (outer pipe) collecting pipe 3-7, an inner heat collector steam (water) inlet 3-8 is arranged on the thin pipe (core pipe) collecting pipe 3-6, and an inner heat collector steam (water) return port 3-9 is arranged on the thick pipe (outer pipe) collecting pipe 3-7;

the multiple groups of heat exchange tubes 3-5 are arranged annularly;

the outer surface of the thick pipe (outer pipe) 3-5-2 is coated with an anticorrosive ceramic layer;

fins or nail heads can be arranged on the outer wall of the thick pipe (outer pipe) 3-5-2, and the whole exposed surfaces of the fins or the nail heads are coated with an anticorrosive ceramic layer;

the pipe diameter of a thin pipe (core pipe) 3-5-1 of the heat exchange pipe 3-5 is selected from DN 15-DN 40, and the pipe diameter of a thick pipe (outer pipe) 3-5-2 is selected from DN 40-DN 65; 6 to 12 groups of heat exchange tube groups are selected in the central area of the ascending tube with Di-do larger than or equal to 200mm, so that the heat exchange area is increased to the maximum in a limited space;

the whole exposed surfaces of the upper and lower guide sliding supports 3-4 are coated with anticorrosive ceramic layers;

the outer wall of the thin tube 3-5-1 is wound with a spiral sheet 3-10, and the spiral sheet can increase the turbulence degree of fluid, improve the heat transfer coefficient, strengthen heat transfer and serve as an inner tube support to prevent the inner tube from vibrating;

the outer wall of the thin tube 3-5-1 can also be provided with a W-shaped sliding support, and the elastic compression type of support can be realized by adopting a W shape, and the pre-tightening type elastic support can prevent the thin tube from vibrating;

a rotational flow distributor is arranged at an opening at the lower end of the thin tube 3-5-1 and is propped against the inner wall of a seal head at the lower end of the outer tube 3-5-2, so that the rotational flow distributor can solve the problem of uniformity of steam (water) baffling, increase the heat extraction effect and prevent local overheating;

the anti-corrosion ceramic layers are coated on the heat remover on the wall of the riser and the exposed surface of the heat remover in the riser, so that the problem that the raw coke gas corrodes metals at high temperature is solved, meanwhile, the heat resistance of the ceramic is utilized, the raw coke gas at the temperature of lower than 450 ℃ is not subjected to heat removal and heat exchange, and the temperature of the raw coke gas is kept to be higher than 450 ℃, so that the problem of coking of the raw coke gas at the temperature of lower than 450 ℃ is thoroughly solved. With the development of anticorrosive coatings and other technologies, the lower limit of 450 ℃ can be broken through to about 300 ℃ in the future.

The method provides a conclusion of experimental study and analysis of a temperature field formed by distributing raw gas flow fields in the riser, the adopted riser wall heat collector can only recover heat at the edge of a raw gas channel, high-temperature raw gas flowing through the central part of the riser is not subjected to heat exchange with the riser wall heat collector, the temperature of the central area is still the high-temperature of a coke discharging furnace, experimental study and analysis of the temperature field formed by the flow fields are utilized, and the riser heat collector is adopted to recover the high-temperature waste heat of the raw gas at the central part of the raw gas, so that all waste heat of the raw gas above 450 ℃ can be fully recovered. The analysis of experimental research shows that: the waste heat of the crude gas fluid thickness of the edge area about 100mm can be recovered by the riser pipe wall heat remover, the boundary layer effect of the crude gas fluid is considered, and the riser pipe inner heat remover of the central area is arranged on the difference between the inner diameter Di of the riser pipe wall heat remover and the outer diameter do of the riser pipe inner heat remover: the central area of the ascending pipe with Di-do more than or equal to 200mm is provided with the heat collector in the ascending pipe, the maximum temperature difference between raw gas and hot water working medium can be formed, namely the maximum heat transfer power is formed, the limited size area is fully utilized for increasing the heat transfer area, so that the number of the heat collectors in the ascending pipe is not too large, and six groups or less and up to one group of heat collectors formed by heat collecting sleeves are arranged according to the inner diameter size of the ascending pipe in order to increase the heat transfer surface area.

Referring to fig. 9 and 10, the heat collector 3 in the riser in the embodiment includes an inner heat collector cylinder 3-1, an inner heat collector upper flange 3-2 and an inner heat collector lower flange 3-3 are respectively arranged at the upper end and the lower end of the inner heat collector cylinder 3-1, the inner heat collector lower flange 3-3 is connected with the upper end of the bridge pipe tee joint 2, and the inner heat collector upper flange 3-2 is connected with the riser water sealing cover 4;

an upper guide sliding support 3-4 and a lower guide sliding support 3-4 are arranged below the inner heat collector barrel 3-1, a plurality of groups of heat exchange tubes 3-5 are arranged between the upper guide sliding support 3-4 and the lower guide sliding support 3-4, the heat exchange tubes 3-5 adopt a serpentine tube structure, the serpentine tube heat exchange tubes 3-5 comprise thin tubes 3-5-1 and thick tubes 3-5-2, the thin tubes 3-5-1 are connected in series with the thick tubes 3-5-2 through reducing of large heads 3-5-3, a thin tube collecting tube 3-6 and a thick tube collecting tube 3-7 are arranged on the periphery of the inner heat collector barrel 3-1, the upper ends of the thin tubes 3-5-1 of the plurality of groups of heat exchange tubes 3-5 are communicated with the thin tube collecting tubes 3-6, the upper ends of the thick tubes 3-5-2 of the plurality of groups of heat, the thin pipe collecting pipe 3-6 is provided with an inner heat collector steam (water) inlet 3-8, and the thick pipe collecting pipe 3-7 is provided with an inner heat collector steam (water) return port 3-9;

a plurality of groups of heat exchange tubes 3-5 are annularly arranged in the ascending tube;

the thin tube 3-5-1 and the thick tube 3-5-2 of the same group of heat exchange tubes 3-5 are positioned on the same circumference;

the pipe diameter of the thin pipe 3-5-1 of the heat exchange pipe 3-5 is selected from DN 15-DN 40, and the pipe diameter of the thick pipe 3-5-2 is selected from DN 40-DN 65; 3 to 6 groups of heat exchange tube groups are selected in the central area of the ascending tube with Di-do larger than or equal to 200mm, so that the heat exchange area is increased to the maximum in a limited space.

Referring to fig. 11 and 12, the heat collector 3 in the riser in the embodiment includes an inner heat collector cylinder 3-1, an inner heat collector upper flange 3-2 and an inner heat collector lower flange 3-3 are respectively arranged at the upper end and the lower end of the inner heat collector cylinder 3-1, the inner heat collector lower flange 3-3 is connected with the upper end of the bridge pipe tee joint 2, and the inner heat collector upper flange 3-2 is connected with the riser water sealing cover 4;

a thin tube 3-5-1 and a thick tube 3-5-2 of the heat exchange tube 3-5 in the same group are arranged along the radial direction, and the thin tube 3-5-1 is positioned at the inner side of the thick tube 3-5-2;

the pipe diameter of the thin pipe 3-5-1 of the heat exchange pipe 3-5 is selected from DN 15-DN 40, and the pipe diameter of the thick pipe 3-5-2 is selected from DN 40-DN 65; 6 to 12 groups of heat exchange tube groups are selected in the central area of the ascending tube with Di-do larger than or equal to 200mm, so that the heat exchange area is increased to the maximum in a limited space;

in order to fully utilize the characteristics of the residual heat in the crude gas riser and the coking sulfur-containing sewage, the coking sulfur-containing sewage is sent to the lower part of the riser under pressure for pyrolysis treatment. A sulfur-containing sewage pyrolysis treatment pipe orifice 13 is obliquely inserted downwards in a rotary tangent mode in the waste heat recovery ascending pipe, and the outlet of the sulfur-containing sewage pyrolysis treatment pipe orifice 13 is inserted into the ascending pipe base 11; the end part of the sulfur-containing sewage pyrolysis treatment pipe orifice 13 inserted into the riser pipe seat 11 is provided with an inclined plane opening, the inclined plane opening faces the center of the riser pipe seat 11, sulfur-containing sewage steam vaporized by the sulfur-containing sewage pyrolysis treatment pipe orifice 13 is injected into the riser pipe seat 11, the center line of the sulfur-containing sewage pyrolysis treatment pipe orifice 13 is extended and then intersects with the bottom surface of the lower opening of the riser pipe seat 11, so that the sewage steam is ensured not to enter a coke oven but enters the riser pipe seat 11 and then loses pressure to flow into a waste heat recovery riser along with crude gas fluid, the sewage steam of rotational flow can increase the turbulence degree of the crude gas in the waste heat recovery riser pipe, the heat taking of the crude gas by the riser pipe wall heat remover 1 is strengthened, part of the outer surfaces of the sulfur-containing sewage pyrolysis treatment pipe orifice 13 entering the waste heat recovery riser pipe and the riser pipe seat 11 are all coated with an anti-corrosion, so as to prevent the high-temperature corrosion of the raw gas.

In addition, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement modes should fall within the protection scope of the claims of the present invention.

Claims

1. The utility model provides a raw coke oven gas high temperature waste heat recovery device which characterized in that: the waste heat recovery riser comprises a waste heat recovery riser, a circulating water pump (5) and a steam pocket (6), wherein the waste heat recovery riser comprises a riser pipe wall heat extractor (1) and a riser pipe inner heat extractor (3) arranged in the riser pipe wall heat extractor (1), the riser pipe wall heat extractor (1) comprises a pipe wall heat extractor water inlet (1-4-4) and a pipe wall heat extractor water return port (1-4-5), the riser pipe inner heat extractor (3) comprises an inner heat extractor steam inlet and an inner heat extractor steam return port, the water inlet of the circulating water pump (5) is connected with the steam pocket (6) through a pipeline, the water outlet of the circulating water pump (5) is connected with a water supply main pipe (7), the water supply main pipe (7) is respectively connected with the pipe wall heat extractor water inlets (1-4-4) of the riser pipe wall heat extractors (1) through a plurality of water supply branch pipes which are connected in parallel, and the water return ports (1-4-5) of the pipe wall heat extractors The steam supply system is characterized in that a plurality of backwater branch pipes connected in parallel are connected to a backwater main pipe (8), the backwater main pipe (8) is connected with a steam drum (6), a saturated steam outlet at the top of the steam drum (6) is connected with a steam supply main pipe (9), the steam supply main pipe (9) is respectively connected with steam inlets of inner heat collectors of the heat collectors (3) in the ascending pipes through a plurality of steam supply branch pipes connected in parallel, the steam inlets of the inner heat collectors of the heat collectors (3) in the ascending pipes are respectively connected to a superheated steam conveying pipe (10) through a plurality of steam return branch pipes connected in parallel, and the superheated steam conveying pipe (10) conveys superheated steam to a required position.

2. The utility model provides a raw coke oven gas high temperature waste heat recovery device which characterized in that: the waste heat recovery riser comprises a waste heat recovery riser, a circulating water pump (5) and a steam pocket (6), wherein the waste heat recovery riser comprises a riser pipe wall heat collector (1) and a riser pipe inner heat collector (3) arranged in the riser pipe wall heat collector, the riser pipe wall heat collector (1) comprises a pipe wall heat collector water inlet (1-4-4) and a pipe wall heat collector water return port (1-4-5), the riser pipe inner heat collector (3) comprises an inner heat collector water inlet and an inner heat collector water return port, the circulating water pump (5) water inlet is connected with the steam pocket (6) through a pipeline, the circulating water pump (5) water outlet is connected with a water supply main pipe (7), the water supply main pipe (7) is respectively connected with the pipe wall heat collector water inlets (1-4-4) of the riser pipe wall heat collectors (1) and the inner heat collector water inlets of the riser pipe inner heat collectors (3) through a plurality of water supply branch pipes which are connected, the pipe wall heat collector water return ports (1-4-5) of the heat collectors (1) on the pipe wall of each ascending pipe and the water return ports of the inner heat collectors of the heat collectors (3) in each ascending pipe are respectively connected to a water return main pipe (8) through a plurality of water return branch pipes which are connected in parallel, the water return main pipe (8) is connected with a steam drum (6), saturated steam outlets of the steam drum (6) are connected with saturated steam conveying pipes (11), and the saturated steam conveying pipes (11) convey saturated steam to required positions.

3. The raw coke oven gas high-temperature waste heat recovery device as claimed in claim 1 or 2, wherein: the heat collector (3) in the ascending pipe is inserted in the difference between the inner diameter Di of the heat collector (1) on the pipe wall of the ascending pipe and the outer diameter do of the heat collector (3) in the ascending pipe: di-do is more than or equal to 200mm in the central area.

4. The raw coke oven gas high-temperature waste heat recovery device as claimed in claim 1 or 2, wherein: the heat remover (3) in the ascending pipe comprises a plurality of groups of heat exchange pipes (3-5), the heat exchange pipes (3-5) adopt a sleeve type structure, the sleeve type heat exchange pipes (3-5) comprise thin pipes (3-5-1) and thick pipes (3-5-2), the lower ends of the thick pipes (3-5-2) are sealed, the lower ends of the thin pipes (3-5-1) are open, the lower ends of the thin pipes (3-5-1) are inserted in the thick pipes (3-5-2), a thin pipe collecting pipe (3-6) and a thick pipe collecting pipe (3-7) are arranged on the periphery of the upper ends of the plurality of groups of heat exchange pipes (3-5), the upper ends of the thin pipes (3-5-1) of the plurality of groups of heat exchange pipes (3-5) are communicated with the thin pipe collecting, the upper ends of the thick pipes (3-5-2) of the multiple groups of heat exchange pipes (3-5) are communicated with the thick pipe collecting pipe (3-7), the thin pipe collecting pipe (3-6) is provided with an inner heat collector steam inlet/water port, and the thick pipe collecting pipe (3-7) is provided with an inner heat collector steam return/water port.

5. The raw coke oven gas high-temperature waste heat recovery device as claimed in claim 1 or 2, wherein: the heat remover (3) in the ascending pipe comprises a plurality of groups of heat exchange pipes (3-5), the heat exchange pipes (3-5) adopt a coiled pipe structure, the coiled pipe type heat exchange pipes (3-5) comprise thin pipes (3-5-1) and thick pipes (3-5-2), the thin pipes (3-5-1) are connected in series with the thick pipes (3-5-2) through reducing diameters of large and small heads (3-5-3), a thin pipe collecting pipe (3-6) and a thick pipe collecting pipe (3-7) are arranged on the periphery of the upper end of the plurality of groups of heat exchange pipes (3-5), the upper ends of the thin pipes (3-5-1) of the plurality of groups of heat exchange pipes (3-5) are all communicated with the thin pipe collecting pipe (3-6), the upper ends of the thick pipes (3-5-2) of the plurality of groups of heat exchange pipes (3-5) are, the thin pipe collecting pipe (3-6) is provided with an inner heat collector steam inlet/water port, and the thick pipe collecting pipe (3-7) is provided with an inner heat collector steam return/water port.

6. The raw coke oven gas high-temperature waste heat recovery device of claim 5, which is characterized in that: the thin pipes (3-5-1) and the thick pipes (3-5-2) of the heat exchange pipes (3-5) of the same group are arranged along the annular direction or the radial direction.

7. The raw coke oven gas high-temperature waste heat recovery device of claim 4, which is characterized in that: the pipe diameter of the thin pipe (3-5-1) of the heat exchange pipe (3-5) is DN 15-DN 40, and the pipe diameter of the thick pipe (3-5-2) is DN 40-DN 65.

8. The raw coke oven gas high-temperature waste heat recovery device of claim 5, which is characterized in that: the pipe diameter of the thin pipe (3-5-1) of the heat exchange pipe (3-5) is DN 15-DN 40, and the pipe diameter of the thick pipe (3-5-2) is DN 40-DN 65.

9. The raw coke oven gas high-temperature waste heat recovery device as claimed in claim 1 or 2, wherein: a sulfur-containing sewage pyrolysis treatment pipe orifice (13) is arranged at the lower part of the waste heat recovery ascending pipe in a rotating, tangential, downward and oblique inserting manner, and an outlet of the sulfur-containing sewage pyrolysis treatment pipe orifice (13) is inserted into the ascending pipe base (12); the end part of the sulfur-containing sewage pyrolysis treatment pipe orifice (13) inserted into the ascending pipe seat (12) is provided with an inclined plane opening, and the inclined plane opening faces to the center of the ascending pipe seat (12).