阅读说明：本技术 一种用于高炉煤气精脱硫的烟气净化系统 (Flue gas purification system for blast furnace gas fine desulfurization ) 是由 张作帅 于 2021-07-15 设计创作，主要内容包括：本发明属于脱硫净化技术领域,具体公开一种用于高炉煤气精脱硫的烟气净化系统,包括依次连接的热交换器、重力除尘器以及布袋除尘器,布袋除尘器包括用于收集净煤气的净煤气罐、用于脱除烟气杂质的除尘组件以及用于清洗除尘组件的清洗组件,除尘组件包括除尘仓以及固定于除尘仓内的布袋,布袋将除尘仓分割成净煤腔和粉尘腔,粉尘腔侧壁设置有烟气进口,底部设置有灰斗出口,净煤腔顶部设置有净煤出口,净煤出口通过净煤管路连通净煤气罐的收集口。高炉产生的荒煤气首先通过热交换器回收高能热量,再通过重力除尘器进行粗除尘后,最后通过布袋除尘器精细除尘,从而有利于后续通过余压透平发电减压阀组的脱硫再利用过程。(The invention belongs to the technical field of desulfurization and purification, and particularly discloses a flue gas purification system for blast furnace gas fine desulfurization, which comprises a heat exchanger, a gravity dust collector and a bag-type dust collector which are sequentially connected, wherein the bag-type dust collector comprises a clean gas tank for collecting clean gas, a dust removal component for removing flue gas impurities and a cleaning component for cleaning the dust removal component, the dust removal component comprises a dust removal bin and a bag fixed in the dust removal bin, the bag divides the dust removal bin into a clean coal cavity and a dust cavity, the side wall of the dust cavity is provided with a flue gas inlet, the bottom of the dust cavity is provided with an ash bucket outlet, the top of the clean coal cavity is provided with a clean coal outlet, and the clean coal outlet is communicated with a collection port of the clean gas tank through a clean coal pipeline. The blast furnace raw gas firstly recovers high-energy heat through the heat exchanger, then carries out coarse dust removal through the gravity dust remover, and finally carries out fine dust removal through the bag-type dust remover, thereby being beneficial to the subsequent desulfurization and recycling process through the residual pressure turbine power generation pressure reducing valve group.)

1. The utility model provides a flue gas purification system for blast furnace gas fine desulfurization sets up between blast furnace and residual pressure turbine power generation pressure reducing valve group, a serial communication port, including heat exchanger, gravity dust collector and the sack cleaner that connects gradually, the sack cleaner is including the clean gas jar that is used for collecting clean gas, the dust removal subassembly that is used for desorption flue gas impurity and the washing subassembly that is used for wasing the dust removal subassembly, the dust removal subassembly includes the dust removal storehouse and is fixed in the sack in the dust removal storehouse, and the sack is cut apart into clean coal chamber and dust chamber with the dust removal storehouse, dust chamber lateral wall is provided with the flue gas import, and the bottom is provided with the ash bucket export, and clean coal chamber top is provided with clean coal export, and clean coal export passes through the collection mouth of clean coal pipeline intercommunication clean gas jar, dust removal storehouse and clean gas jar are connected respectively to the washing subassembly both ends.

2. The flue gas purification system for blast furnace gas fine desulfurization according to claim 1, wherein the cleaning assembly comprises a backflushing pipeline arranged between the clean gas tank and the clean gas outlet, and a filtering pipeline arranged between the dust chamber and the clean gas tank, one end of the backflushing pipeline is communicated with the first connector of the clean gas tank, the other end of the backflushing pipeline is communicated with the clean gas outlet, one end of the filtering pipeline is communicated with the gas washing outlet of the dust chamber, and the other end of the filtering pipeline is communicated with the second connector of the clean gas tank.

3. The flue gas purification system for blast furnace gas fine desulfurization according to claim 2, wherein a filter tank is disposed on the filter pipeline, the openings at the two ends of the filter tank are respectively connected with the filter pipeline in a sealing manner, and two filter sealing valves are further disposed on the filter pipeline and are respectively disposed at the two sides of the filter tank.

4. The flue gas purification system for blast furnace gas fine desulfurization according to claim 2, wherein a pneumatic booster pump and a flow valve are arranged on the back flushing pipeline, the pneumatic booster pump is arranged close to the clean gas tank, and the flow valve is arranged far away from the clean gas tank.

5. The flue gas purification system for blast furnace gas fine desulfurization according to claim 2, wherein the flue gas inlet and the scrubbing gas outlet are arranged opposite to each other with the axis of the dust removal bin as a symmetry axis, and the flue gas inlet and the scrubbing gas outlet are respectively provided with a dust baffle for preventing dust from entering the flue gas inlet and the scrubbing gas outlet.

6. The flue gas purification system for blast furnace gas fine desulfurization according to claim 1, wherein the gravity dust collector comprises a settling tank and a flared tube with an opening extending downwards into the settling tank, the top end of the flared tube is a gravity dust-removing inlet, a gravity dust-removing outlet for outputting gas after gravity dust removal is arranged on the side wall above the settling tank, the bottom end of the flared tube is lower than the gravity dust-removing outlet, and an annular sprayer for assisting gas impurity settling is further arranged between the bottom end of the flared tube and the gravity dust-removing outlet.

7. The flue gas purification system for blast furnace gas fine desulfurization according to claim 6, wherein the annular inner diameter length of the annular atomizer is not greater than the outer diameter length of the bottom end of the flared tube, and the annular outer diameter length of the annular atomizer is less than the inner diameter length of the settling tank.

8. The flue gas purification system for blast furnace gas fine desulfurization according to claim 6, wherein the bottom end of the annular atomizer is provided with a plurality of atomizing nozzles along the direction of the annular periphery.

9. The flue gas purification system for blast furnace gas fine desulfurization according to claim 6, wherein a settled impurity outlet is arranged at the bottom end of the settling tank, and the settled impurity outlet is connected with a conveying auger for hermetically conveying the settled impurities.

10. The flue gas purification system for blast furnace gas fine desulfurization according to claim 1, wherein the heat exchanger comprises a linear pipeline hermetically connected between the blast furnace pipeline and the gravity dust collector pipeline and a cooling pipeline sleeved outside the linear pipeline, the cooling pipeline is hermetically connected with the linear pipeline, and a cooling liquid inlet and a cooling liquid outlet for the inlet and outlet of cooling liquid are respectively arranged at two ends of the cooling pipeline.

Technical Field

The invention belongs to the technical field of desulfurization and purification, and particularly relates to a flue gas purification system for blast furnace gas fine desulfurization.

Background

The blast furnace gas is a combustible gas by-product in the blast furnace smelting process, mainly comprises carbon monoxide, carbon dioxide, nitrogen, hydrogen and hydrocarbons, and simultaneously contains a small amount of H₂S, organic sulfur (mainly COS and CS)₂) And dust; blast furnace coalThe gas has the characteristics of low heat value and large gas amount, so the utilization difficulty of the gas is increased; besides being used as fuel for hot blast stoves of a system, a great deal of abundant blast furnace gas needs to be discharged, and the discharged blast furnace gas is usually used for TRT power generation, heating furnaces and the like. Patent CN202011359664.9 discloses a fine desulfurization system for blast furnace gas, which comprises a blast furnace, a gravity dust collector, a dry bag dust collector, a blast furnace gas residual pressure turbine power generation device and a blast furnace gas electrochemical cooperative wet desulfurization system sequentially connected by a pipeline, wherein the blast furnace gas electrochemical cooperative wet desulfurization system is connected with a gas cabinet through a pipeline, and the gas cabinet sends gas to a user terminal through a gas pipe network. The fine desulfurization system can treat the blast furnace gas before entering downstream users, thereby reducing the secondary pollution to the environment. However, the front-end flue gas purification treatment part in this way wastes a large amount of blast furnace gas heat energy, and the higher gas temperature is not suitable for the subsequent desulfurization process, so the flue gas purification part needs to be improved to improve the desulfurization efficiency.

Accordingly, further developments and improvements are still needed in the art.

Disclosure of Invention

In order to solve the above problems, a flue gas purification system for fine desulfurization of blast furnace gas has been proposed. The invention provides the following technical scheme:

the utility model provides a flue gas purification system for blast furnace gas fine desulphurization sets up between blast furnace and residual pressure turbine power generation pressure reducing valve group, including heat exchanger, gravity dust remover and the sack cleaner that connects gradually, the sack cleaner is including the clean gas jar that is used for collecting clean gas, the dust removal subassembly that is used for desorption flue gas impurity and the washing subassembly that is used for wasing the dust removal subassembly, the dust removal subassembly includes the dust removal storehouse and is fixed in the sack in the dust removal storehouse, and the sack is cut apart into clean coal chamber and dust chamber with the dust removal storehouse, dust chamber lateral wall is provided with the flue gas import, and the bottom is provided with the ash bucket export, and clean coal chamber top is provided with clean coal export, and clean coal export is through the collection mouth of clean coal pipe way intercommunication clean gas jar, clean coal chamber and clean gas jar are connected respectively to washing subassembly both ends.

Further, the cleaning assembly comprises a backflushing pipeline arranged between the clean gas tank and the clean coal outlet and a filtering pipeline arranged between the dust cavity and the clean gas tank, one end of the backflushing pipeline is communicated with the first interface of the clean gas tank, the other end of the backflushing pipeline is communicated with the clean coal outlet, one end of the filtering pipeline is communicated with the gas washing outlet of the dust cavity, and the other end of the filtering pipeline is communicated with the second interface of the clean gas tank.

Furthermore, a filtering tank is arranged on the filtering pipeline, openings at two ends of the filtering tank are respectively in sealing connection with the filtering pipeline, two filtering sealing valves are further arranged on the filtering pipeline, and the two filtering sealing valves are respectively arranged at two sides of the filtering tank.

Further, be provided with pneumatic booster pump and flow valve on the recoil pipeline, pneumatic booster pump sets up in being close to net gas bottle department, the flow valve sets up in keeping away from net gas bottle department.

Furthermore, the flue gas inlet and the scrubbing outlet are arranged oppositely by taking the axis of the dust removal bin as a symmetry axis, and the flue gas inlet and the scrubbing outlet are respectively provided with a dust baffle for preventing dust from entering the flue gas inlet and the scrubbing outlet.

Further, gravity dust remover includes that settling cask and opening stretch into the inside horn pipe of settling cask down, and the horn pipe top is the gravity dust removal import, is provided with the gravity dust removal export of output gravity dust removal back coal gas on the lateral wall of settling cask top, and the horn pipe bottom is less than the gravity dust removal export, still is provided with the annular atomizer that is used for supplementary coal gas impurity to subside between horn pipe bottom and the gravity dust removal export.

Further, the annular inner diameter length of the annular sprayer is not more than the outer diameter length of the bottom end of the flared tube, and the annular outer diameter length of the annular sprayer is less than the inner diameter length of the settling tank.

Further, a plurality of spray outlets are formed in the bottom end of the annular sprayer along the annular peripheral direction.

Furthermore, the bottom end of the sedimentation tank is provided with a sedimentation impurity outlet, and the sedimentation impurity outlet is connected with a conveying auger for conveying sedimentation impurities in a sealing manner.

Further, heat exchanger includes the sharp pipeline of sealing connection between blast furnace pipeline and gravity dust collector pipeline and cup joints the cooling pipeline in the sharp pipeline outside, cooling pipeline and sharp pipeline sealing connection, the both ends of cooling pipeline are provided with coolant liquid import and the coolant liquid export that is used for the coolant liquid business turn over respectively.

Has the advantages that:

1. raw gas generated by a blast furnace firstly recovers high-energy heat through a heat exchanger, coarse dust removal is carried out through a gravity dust remover, fine dust removal is carried out through a bag-type dust remover, and the raw gas is converted into clean gas with low energy and few impurity particles after three-stage operation, so that the subsequent desulfurization and reutilization process through a residual pressure turbine power generation pressure reducing valve group is facilitated;

2. by adding the clean gas tank for caching the clean gas and the cleaning component for communicating the clean gas tank with the dust removal bin outside the dust removal bin, a cloth bag in the dust removal bin is backflushed by the cleaning component in time after the flue gas is dedusted, and the influence of long-term hardening of impurities in the cloth bag on the dedusting efficiency is avoided;

3. the adoption of clean gas for dedusting can avoid introducing external source gas into the dedusting bin, and ensure the stability of gas components;

4. raw gas is introduced into the settling tank through the horn tube, the upper end of the horn tube is provided with a thin opening, the lower end of the horn tube is provided with a thick opening, so that the gas flow velocity of the raw gas is reduced, the gravity dust removal effect can be well realized through the design of an upper gas path and a lower gas path, large particle impurities in the raw gas are preferentially sunk under the action of gravity and cannot be continuously transmitted upwards around the path, the weight of light impurities in the raw gas is increased by arranging the annular sprayer, the particle impurities are preferentially settled after absorbing water or being attached by water, and the dust removal rate of the gravity dust remover is improved;

5. the annular sets up a plurality of nozzle and is circular range for the spray can cover the raw coke oven gas of following the output of horn pipe bottom comprehensively, thereby improves impurity and subsides efficiency.

Drawings

FIG. 1 is a schematic structural diagram of an installation state of a flue gas purification system for blast furnace gas fine desulfurization according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a bag-type dust collector structure and a schematic diagram of a dust-removing gas path flow direction in an embodiment of the present invention;

FIG. 3 is a schematic diagram of a bag-type dust collector structure and a schematic diagram of a flow direction of a cleaning gas path in an embodiment of the present invention;

FIG. 4 is a schematic diagram of the internal structure of a gravity dust collector according to an embodiment of the present invention;

FIG. 5 is a schematic sectional view taken along line A-A in FIG. 4 according to the present invention.

In the drawings: 1000. a bag-type dust collector; 1100. a dust removal bin; 1110. a cloth bag; 1120. a clean coal cavity; 1121. a clean coal outlet; 1130. a dust chamber; 1131. a dust baffle; 1132. a flue gas inlet; 1133. a scrubbing outlet; 1134. an ash hopper outlet; 1135. a shuttle-shaped buffer portion; 1140. a filtering pipeline; 1141. a filter tank; 1142. a filter seal valve; 1150. a clean coal pipeline; 1151. a three-way valve; 1160. a back flushing pipeline; 1161. a pneumatic booster pump; 1162. a flow valve; 1200. a clean gas tank; 2000. a gravity dust collector; 2100. a settling tank; 2110. a gravity dust removal outlet; 2120. a settled impurity outlet; 2200. a flare tube; 2210. a gravity dust removal inlet; 2300. an annular sprayer; 2310. a spray nozzle; 3000. a heat exchanger; 4000. a blast furnace; 5000. the residual pressure turbine power generation pressure reducing valve bank.

Detailed Description

In order to make the technical solutions of the present invention better understood, the following description of the technical solutions of the present invention with reference to the accompanying drawings of the present invention is made clearly and completely, and other similar embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments in the present application shall fall within the protection scope of the present application. In addition, directional terms such as "upper", "lower", "left", "right", etc. in the following embodiments are directions with reference to the drawings only, and thus, the directional terms are used for illustrating the present invention and not for limiting the present invention.

As shown in fig. 1-5, a flue gas purification system for blast furnace gas fine desulfurization is arranged between a blast furnace 4000 and a residual pressure turbine power generation pressure reducing valve group 5000, and comprises a heat exchanger 3000, a gravity dust collector 2000 and a bag-type dust collector 1000 which are connected in sequence, the bag-type dust collector 1000 comprises a clean gas tank 1200 for collecting clean gas, a dust removal component for removing impurities in flue gas, and a cleaning component for cleaning the dust removal component, the dust removing component comprises a dust removing bin 1100 and a cloth bag 1110 fixed in the dust removing bin 1100, the cloth bag 1110 divides the dust removing bin 1100 into a clean coal cavity 1120 and a dust cavity 1130, the lateral wall of the dust cavity 1130 is provided with a flue gas inlet 1132, the bottom of the dust cavity is provided with an ash bucket outlet 1134, the top of the clean coal cavity 1120 is provided with a clean coal outlet 1121, the clean coal outlet 1121 is communicated with a collecting port of a clean coal gas tank 1200 through a clean coal pipeline 1150, and two ends of the cleaning assembly are respectively connected with the dust removal bin 1100 and the clean coal gas tank 1200. Through set gradually heat exchanger 3000 between blast furnace 4000 and excess pressure turbine power generation pressure reducing valve group 5000, gravity dust collector 2000 and sack cleaner 1000, realize that the raw coke oven gas that blast furnace 4000 produced at first retrieves the high energy heat through heat exchanger 3000, carry out the back of thick dust removal through gravity dust collector 2000, the meticulous dust removal of rethread sack cleaner 1000, after tertiary operation, raw coke oven gas converts the clean coal gas that the low energy and impurity particle are few into, thereby be favorable to follow-up desulfurization through excess pressure turbine power generation pressure reducing valve group 5000 to recycle the process. By adding the clean gas tank 1200 for caching clean gas and the cleaning component for communicating the clean gas tank 1200 with the dust removal bin 1100 outside the dust removal bin 1100, the cloth bag 1110 in the dust removal bin 1100 is backflushed by the cleaning component in time after the flue gas is dedusted, and the influence of long-term hardening of impurities in the cloth bag 1110 on the dedusting efficiency is avoided. The adoption of clean gas for dedusting can avoid the introduction of external source gas into the dedusting bin 1100, and ensure the stability of gas components.

Further, the cleaning assembly comprises a backflushing pipeline 1160 arranged between the clean gas tank 1200 and the clean gas outlet 1121 and a filtering pipeline 1140 arranged between the dust cavity 1130 and the clean gas tank 1200, wherein one end of the backflushing pipeline 1160 is communicated with a first connector of the clean gas tank 1200, the other end of the backflushing pipeline is communicated with the clean gas outlet 1121, one end of the filtering pipeline 1140 is communicated with a gas washing outlet 1133 of the dust cavity 1130, and the other end of the filtering pipeline 1140 is communicated with a second connector of the clean gas tank 1200. The clean gas in the clean gas tank 1200 is reversely introduced into the dust removal bin 1100 through the backflushing pipeline 1160, impurities accumulated on the cloth bag 1110 naturally fall to the ash bucket outlet 1134 under the action of the backflushing wind force of the clean gas, in order to ensure the fluidity of wind pressure, the gas with the impurities needs to be recovered by correspondingly arranging the scrubbing outlet 1133, and the gas with the impurities can be filtered and recovered into the clean gas tank 1200 by arranging the filtering pipeline 1140 at the scrubbing outlet 1133.

Further, a filter tank 1141 is disposed on the filter pipeline 1140, two end openings of the filter tank 1141 are respectively connected to the filter pipeline 1140 in a sealing manner, two filter seal valves 1142 are further disposed on the filter pipeline 1140, and the two filter seal valves 1142 are respectively disposed on two sides of the filter tank 1141. Be provided with the filter core that is used for filtering impurity in filtering jar 1141, filter jar 1141 is detachable to be connected, makes things convenient for the renew cartridge, and the filter core is less, and the accessible is installed once more after the outside is washd and is circulated and use, for changing sack 1110 of dust removal storehouse 1100, the renew cartridge process is more simple quick.

Further, a pneumatic booster pump 1161 and a flow valve 1162 are arranged on the backflushing pipeline 1160, the pneumatic booster pump 1161 is arranged at a position close to the clean gas tank 1200, and the flow valve 1162 is arranged at a position far away from the clean gas tank 1200. Through adjusting three-way valve 1151, can realize the conversion of dust removal and cleaning process on the basis that does not change whole equipment mechanism, it is simple effective.

Further, flue gas inlet 1132 and scrubbing outlet 1133 use the dust removal storehouse 1100 axis to set up relatively as the symmetry axis, flue gas inlet 1132 and scrubbing outlet 1133 punishment are provided with respectively and are used for blockking the dust and get into the dust baffle 1131 of flue gas inlet 1132 and scrubbing outlet 1133. The dust baffle 1131 is an inclined plate with one end fixed on the inner wall of the dust removal bin 1100, and the inclined direction of the inclined plate faces the axial direction of the dust removal bin 1100. The hang plate is used for guiding the air current trend, because the air current effect that receives flowing gas can form the negative pressure face in hang plate upper surface department, further attracts the flue gas flow direction hang plate upper surface department of new entering, and then filters towards sack 1110 department again, and the relative hang plate that sets up in both sides forms the bucket column structure of the triangle of falling just, make the impurity that falls down on the sack 1110 fall into ash bucket export 1134 through the collection of bucket column structure, and can not be blown to the washing gas export 1133 department of relative setting by the flue gas that flue gas inlet 1132 department newly got into. The lowermost end of the soot baffle 1131 is lower than the lowermost ends of the flue gas inlet 1132 and the scrubbing gas outlet 1133. The cloth bags 1110 are provided with a plurality of cloth bags, a clean coal outlet 1121 is arranged above each cloth bag 1110, and the plurality of clean coal outlets 1121 are collected through a clean coal pipeline 1150. The clean coal outlet 1121 is disposed right above the same axis of the cloth bag 1110, so that the cloth bag 1110 is convenient to clean while clean coal gas is convenient to collect. A shuttle-shaped buffer part 1135 is connected between the ash hopper outlet 1134 and the dust removal bin 1100. The fusiform buffer 1135 is used for buffering the impurity that sack 1110 fell down, and the latter half of fusiform buffer 1135 is funnel-shaped for the collection, and the upper half is the funnel-shaped of back-off, because the connector between fusiform buffer 1135 and the dust removal storehouse 1100 is less to avoid being blown again in the dust chamber 1130 by the flue gas disturbance.

Further, the gravity dust collector 2000 comprises a settling tank 2100 and a flared tube 2200 with an opening downwards extending into the settling tank 2100, the top end of the flared tube 2200 is a gravity dust collection inlet 2210, a gravity dust collection outlet 2110 for outputting gas after gravity dust collection is arranged on the side wall above the settling tank 2100, the bottom end of the flared tube 2200 is lower than the gravity dust collection outlet 2110, and an annular sprayer 2300 for assisting in settling of gas impurities is further arranged between the bottom end of the flared tube 2200 and the gravity dust collection outlet 2110. In introducing the crude gas into settling cask 2100 through horn pipe 2200, horn pipe 2200 upper end opening is thin, the lower extreme opening is thick, thereby crude gas air velocity has been slowed down, by last realization gravity dust removal effect that the gas circuit design can be fine down, make the large granule impurity in crude gas sink under the action of gravity preferentially, and can not upwards continue the transmission by detour, come for the light impurity of weight increase weight in the crude gas through setting up annular atomizer 2300, can preferentially subside after the granule impurity absorbs water or is adhered to by water, promote gravity dust collector 2000's dust removal rate. The top end of the annular sprayer 2300 is provided with a water inlet pipeline, the side wall of the water inlet pipeline is sealed and fixed on the top wall of the settling tank 2100, and the water inlet pipeline is externally connected with a pressurized water source to ensure that the water source in the annular spraying gas is always maintained in a full state. The annular spraying mist is highly disposed between the bottom end of the horn 2200 and the gravity dust-removing outlet 2110 so as to prevent the spraying mist from spraying into the horn 2200 or the gravity dust-removing outlet 2110 and prevent the liquid sprayed on the outer wall of the horn 2200 from sliding down to the settled impurity outlet 2120 at the bottom along the outer wall of the horn 2200.

Further, the annular inner diameter length of the annular sprayer 2300 is not more than the outer diameter length of the bottom end of the flared tube 2200, and the annular outer diameter length of the annular sprayer 2300 is less than the inner diameter length of the settling tank 2100. This arrangement ensures that the spray from the annular atomiser 2300 is able to radiate to the raw gas escaping from the bottom end of the bell pipe 2200.

Further, the bottom end of the annular sprayer 2300 is provided with a plurality of spray outlets 2310 along the annular peripheral direction. The annular sets up a plurality of nozzle 2310 and is circular range for the spray can comprehensively cover the raw coke oven gas of following horn 2200 bottom output, thereby improves impurity and subsides efficiency.

Further, the bottom end of the settling tank 2100 is provided with a settled impurity outlet 2120, and the settled impurity outlet 2120 is connected with a conveying auger for sealing and conveying settled impurities. Realize subsiding the sealed transmission of impurity export 2120 through setting up the transport auger, owing to come supplementary coal gas gravity through the spraying and subside, consequently the impurity of subsiding impurity export 2120 department is mostly pulpy state or liquid impurity, directly carries through the pipeline and produces blocking phenomenon easily, and through carrying the auger just can be fine solution jam problem, reduce the clearance degree of difficulty, improve cleanliness in the settling cask 2100.

Further, heat exchanger 3000 includes the sharp pipeline of sealing connection between blast furnace 4000 pipeline and gravity dust collector 2000 pipeline and cup joints the cooling pipeline in the sharp pipeline outside, cooling pipeline and sharp pipeline sealing connection, the both ends of cooling pipeline are provided with coolant liquid import and the coolant liquid export that is used for the coolant liquid business turn over respectively. Through setting up the straight line pipeline, reduce the deposit of crude gas impurity at the pipeline inner wall, be favorable to the clearance to the pipeline inner wall simultaneously, it is preferred, the straight line pipeline is vertical to be set up between blast furnace 4000 export and gravity dust remover 2000, gravity dust remover 2000 sets up the position and is less than blast furnace 4000 setting position promptly, the coolant liquid import sets up in vertical cooling pipe way below this moment, the coolant liquid export sets up in vertical cooling pipe way top, the crude gas import sets up in the straight line pipeline top, the crude gas export sets up in the straight line pipeline below, this structural arrangement can the maximize for the crude gas cooling, retrieve crude gas heat energy as far as possible.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

The present invention has been described in detail, and it should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.