CN211425087U - Compact flue gas waste heat utilization device - Google Patents
Compact flue gas waste heat utilization device Download PDFInfo
- Publication number
- CN211425087U CN211425087U CN201922181334.4U CN201922181334U CN211425087U CN 211425087 U CN211425087 U CN 211425087U CN 201922181334 U CN201922181334 U CN 201922181334U CN 211425087 U CN211425087 U CN 211425087U
- Authority
- CN
- China
- Prior art keywords
- flue gas
- waste heat
- exhaust
- heat boiler
- boiler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Chimneys And Flues (AREA)
Abstract
The utility model relates to a flue gas waste heat utilization equipment of compact, including vertical exhaust-heat boiler and horizontal deposit room, exhaust-heat boiler stands in deposit room top and exhaust-heat boiler bottom and inserts perpendicularly to the deposit room in, and boiler flue gas entry is seted up in the exhaust-heat boiler bottom. Through arranging exhaust-heat boiler in the settling chamber top, when guaranteeing to the effect of the thick dust removal of flue gas and waste heat utilization, make the device overall arrangement compactification, reduce equipment area, flue gas circulation route can show and shorten, and the flue gas temperature drop reduces, can avoid the regeneration of dioxin class material. And vertical exhaust-heat boiler inserts perpendicularly to the settling chamber in, on the one hand the flue gas of partial horizontal circulation can produce the collision with exhaust-heat boiler's outer wall, does benefit to the flue gas and removes dust, and on the other hand, these flue gases need be changed into downward circulation by the horizontal circulation earlier and get into in the exhaust-heat boiler, change into the circulation that makes progress by downward circulation again, therefore can reach the effect that the flue gas flow direction changes many times, and the settling effect of dust is better.
Description
Technical Field
The utility model belongs to the technical field of industrial kiln flue gas is handled, concretely relates to flue gas waste heat utilization equipment of compact.
Background
In the smelting process of metallurgical industrial furnaces such as electric furnaces, a large amount of high-temperature flue gas is generated. Taking an electric furnace as an example, the temperature of the smoke at the furnace mouth can reach 2000 ℃, and the heat carried by the high-temperature smoke accounts for about 10 percent of the total energy consumption of the electric furnace, and some of the heat even reaches 20 percent. How to fully recover the sensible heat in the high-temperature flue gas and turn the sensible heat into valuable, so that the sensible heat is converted into heat energy which is easy to utilize, and the temperature of the flue gas is reduced to the temperature which can enter a subsequent dust removal system, which is an important subject in the field of metallurgy.
The waste heat utilization of the flue gas by using the waste heat boiler is a common technical means, and in order to prevent dust in the flue gas from blocking a pipeline of the waste heat boiler, a coarse dust removal device is usually arranged in front of the waste heat boiler. At present, the devices are generally installed in a split mode, and for connection between coarse dust removal equipment and a waste heat boiler, a heat insulation flue or a common flue is generally adopted, so that the occupied space is large, and the problem of large temperature drop of flue gas in the circulation process is solved; especially for the flue gas of the electric furnace, dioxin substances can be generated or synthesized again in the range of 250-700 ℃, so the influence on the environment is large.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a flue gas waste heat utilization equipment of compact can solve prior art's partial defect at least.
The utility model relates to a flue gas waste heat utilization equipment of compact, including exhaust-heat boiler, still include horizontal settling chamber, exhaust-heat boiler is vertical boiler, exhaust-heat boiler stands in the top of settling chamber and exhaust-heat boiler's bottom insert perpendicularly extremely in the settling chamber, exhaust-heat boiler's boiler flue gas entry is seted up in its bottom.
As one embodiment, a plurality of groups of flue gas heat exchange units are sequentially arranged in the furnace of the waste heat boiler from bottom to top.
As one embodiment, the exhaust-heat boiler is provided with a steam drum, the uppermost flue gas heat exchange unit is an economizer, a water outlet of the economizer is communicated with a water inlet of the steam drum, water outlets of the steam drum are respectively communicated with heat exchange medium inlets of other flue gas heat exchange units, and a saturated steam inlet of the steam drum is respectively communicated with heat exchange medium outlets of other flue gas heat exchange units.
In one embodiment, a partition board is arranged in the settling chamber, the partition board extends upwards from the bottom of the settling chamber, the top end of the partition board is spaced from the top plate of the settling chamber, and the flue gas inlet of the settling chamber and the waste heat boiler are respectively arranged on the left side and the right side of the partition board.
In one embodiment, the top end of the baffle is located above the boiler flue gas inlet.
As one of the implementation modes, the compact flue gas waste heat utilization device further comprises a combustion chamber, a combustion structure for promoting combustible components in the flue gas to combust is arranged on the combustion chamber, and a combustion flue gas outlet of the combustion chamber is communicated with the settling chamber.
As an embodiment, the combustion chamber is arranged on top of the settling chamber.
As an embodiment, the bottom of the combustion chamber is vertically inserted into the settling chamber, and the flue gas outlet of the combustion chamber is opened at the bottom end thereof.
In one embodiment, the exhaust-heat boiler is provided with a steam drum, a superheater is arranged in the combustion chamber, and a saturated steam outlet of the steam drum is communicated with a steam inlet of the superheater.
In one embodiment, the combustion chamber is provided with a vent.
The utility model discloses following beneficial effect has at least:
the utility model provides a flue gas waste heat utilization equipment, through arranging exhaust-heat boiler in the top of deposit room, when guaranteeing to the effect of flue gas coarse dust removal and waste heat utilization, can make the overall arrangement compactification of device, equipment area reduces remarkably, flue gas circulation route can show and shorten, the flue use amount reduces, not only the equipment investment reduces, moreover, the temperature drop of flue gas in the circulation process reduces, to the flue gas of easy formation dioxin such as electric stove flue gas, then can avoid the regeneration of dioxin class material, improve exhaust-heat boiler's waste heat utilization effect, the system energy consumption can reduce and the efficiency is showing and is improving. And vertical exhaust-heat boiler inserts perpendicularly to the settling chamber in, on the one hand the flue gas of partial horizontal circulation can produce the collision with exhaust-heat boiler's outer wall, does benefit to the flue gas and removes dust, and on the other hand, these flue gases need be changed into downward circulation by the horizontal circulation earlier and get into in the exhaust-heat boiler, change into the circulation that makes progress by downward circulation again, therefore can reach the effect that the flue gas flow direction changes many times, and the settling effect of dust is better.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is the embodiment of the utility model provides a compact's flue gas waste heat utilization equipment's schematic structure diagram.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As fig. 1, the embodiment of the utility model provides a flue gas waste heat utilization equipment of compact, including exhaust-heat boiler 2 and horizontal settling chamber 1, this exhaust-heat boiler 2 is vertical boiler, and this exhaust-heat boiler 2 stands in the top of settling chamber 1 and this exhaust-heat boiler 2's bottom insert perpendicularly extremely in the settling chamber 1, exhaust-heat boiler 2's boiler flue gas entry is seted up in its bottom.
Obviously, the flue gas in the settling chamber 1 needs to enter the waste heat boiler 2, that is, the flue gas enters the settling chamber 1 from the flue gas inlet of the settling chamber 1 and then is discharged into the waste heat boiler 2 from the flue gas inlet of the boiler, and then a certain distance is formed between the flue gas inlet of the boiler and the bottom of the settling chamber 1. The flow cross-sectional area in the settling chamber 1 is generally larger than the area of the flue gas inlet, the flow velocity of the flue gas is reduced after the flue gas enters the settling chamber 1, and large-particle dust and the like in the flue gas are settled, so that the settling chamber 1 has the function of performing coarse dust removal on the flue gas. The settling chamber 1 is of a horizontal structure, and the flue gas horizontally circulates in the settling chamber 1; and vertical exhaust-heat boiler 2 inserts perpendicularly to the deposit room 1 in, on the one hand the flue gas of partial horizontal circulation can produce the collision with exhaust-heat boiler 2's outer wall, does benefit to the flue gas and removes dust, and on the other hand, these flue gases need be changed into downward circulation by the horizontal circulation earlier and get into in exhaust-heat boiler 2, change into upward circulation by downward circulation again, therefore can reach the effect that the flue gas flow direction changes many times, and the effect of subsiding of dust is better.
The settling chamber 1 is preferably of a concrete structure, so that the structural strength of the settling chamber is ensured, and equipment above the settling chamber is convenient to install; the waste heat boiler 2 may be fixedly supported on the top of the settling chamber 1 by a mounting bracket or the like. Accordingly, an ash hopper and an ash discharge device may be provided at the bottom of the settling chamber 1 for recovering the dust trapped at the bottom of the settling chamber 1.
The flue gas waste heat utilization equipment that this embodiment provided, arrange in the top of deposit room 1 through with exhaust-heat boiler 2, when guaranteeing to the effect of flue gas coarse dust removal and waste heat utilization, can make the overall arrangement compactification of device, equipment area reduces remarkably, flue gas circulation route can show and shorten, the flue use amount reduces, not only the equipment investment reduces, moreover, the temperature drop of flue gas at the circulation in-process reduces, to the flue gas of easy formation dioxin such as electric stove flue gas, then can avoid the regeneration of dioxin class material, improve exhaust-heat boiler 2's waste heat utilization effect, the system energy consumption can reduce and the efficiency is showing and is improving.
Further preferably, as shown in fig. 1, multiple groups of flue gas heat exchange units are arranged in the waste heat boiler 2 from bottom to top in sequence. In this embodiment, the steam generated by the exhaust-heat boiler 2 is saturated steam; the waste heat boiler 2 is provided with a steam drum 4, the uppermost flue gas heat exchange unit is an economizer 22, the water outlet of the economizer 22 is communicated with the water inlet of the steam drum 4, the water outlet of the steam drum 4 is respectively communicated with the heat exchange medium inlets of other flue gas heat exchange units, and the saturated steam inlet of the steam drum 4 is respectively communicated with the heat exchange medium outlets of other flue gas heat exchange units.
The feed water after being deoxidized by the deaerator enters the steam pocket 4 after being heated by the economizer 22 at the tail end of the waste heat boiler 2, so that the energy consumption of the device in operation can be reduced; saturated water in the steam drum 4 enters other flue gas heat exchange units, heat in the flue gas is absorbed and converted into saturated steam, and therefore the utilization of the flue gas waste heat is achieved, the saturated steam enters the steam drum 4, and after steam-water separation, the saturated steam can be used for steam utilization. For the other flue gas heat exchange units, the evaporator 21 can be adopted, and the specific installation structure is conventional in the art and will not be described herein.
Further optimizing the above embodiment, referring to fig. 1, a partition 11 is provided in the settling chamber 1, the partition 11 extends upward from the bottom of the settling chamber 1, and a distance is provided between the top end of the partition 11 and the top plate of the settling chamber 1, so that the flue gas can flow through the partition 11, and the flue gas inlet of the settling chamber 1 and the waste heat boiler 2 are arranged on the left and right sides of the partition 11. It is further possible to arrange the top end of the partition above the flue gas inlet of the boiler. Based on this structure, can make the flue gas that comes from the flue gas inlet side of deposit room 1 continuously produce the collision with exhaust-heat boiler's outer wall, do benefit to the flue gas and remove dust to make in all flue gases in deposit room 1 need change the downward circulation into by horizontal circulation earlier and get into exhaust-heat boiler 2, further improve the settlement effect of dust.
Further optimizing the above embodiment, as shown in fig. 1, the compact flue gas waste heat utilization device further includes a combustion chamber 3, a combustion structure for promoting combustible components in the flue gas to combust is arranged on the combustion chamber 3, and a combustion flue gas outlet of the combustion chamber 3 is communicated with a flue gas inlet of the settling chamber 1. The combustion chamber 3 is mainly used for promoting combustible components in the flue gas to be fully combusted, wherein the combustible components are mainly CO, and other combustible components can be contained according to different types of the flue gas; meanwhile, the flue gas is promoted to combust, the flue gas temperature can be effectively improved, the subsequent flue gas waste heat utilization is convenient, particularly for the flue gas of the electric furnace, the volume fraction of CO is less than 10%, the recovery value is low, and the flue gas can promote the decomposition of dioxin-like substances in the flue gas while being combusted, so that the energy consumption for removing the dioxin-like substances can be effectively reduced.
As an optional implementation mode, an explosion-proof door is arranged on the combustion chamber 3 to ensure the operation safety of the device.
In one embodiment, the combustion structure includes an ignition burner 311, and a primary air supply outlet 312 may be further configured to supply fresh air into the combustion chamber 3, so as to improve the combustion effect and the combustion efficiency of the flue gas, the ignition burner 311 and the primary air supply outlet 312 may be disposed at the flue gas inlet side of the combustion chamber 3, and by mixing fresh air into the inlet flue gas, it may be ensured that CO in the flue gas is burned out, and the flue gas temperature is effectively increased; in other embodiments, it is also possible to integrate the primary air supply duct into the point burner tip 311.
Further preferably, as shown in fig. 1, the combustion chamber 3 includes a primary combustion section 31 and a secondary afterburning section 32 connected to the bottom of the primary combustion section 31, and the combustion structure correspondingly includes a primary combustion structure disposed on the primary combustion section 31 and a secondary afterburning structure disposed on the secondary afterburning section 32, and the primary combustion structure can adopt a structure in which the ignition burner 311 is matched with the primary air supply outlet 312; the secondary afterburning structure may also adopt a structure that the afterburning burner 321 is matched with the secondary air supply outlet 322, and in another embodiment, it is also feasible to integrate the secondary air supply pipe on the afterburning burner 321.
Through setting up secondary afterburning section 32, can guarantee that 3 export flue gases of combustion chamber are through the flue gas that fully burns, do not contain CO and dioxin class material, be convenient for follow-up flue gas waste heat utilization and emission. Further, still be equipped with flue gas analyzer in combustion chamber 3, flue gas analyzer is located one side that is close to settling chamber 1 of secondary after-combustion structure, for example arranges in the outlet side of combustion chamber 3, detects CO content, dioxin class material content and flue gas temperature in the combustion chamber 3 export flue gas through this flue gas analyzer to guide the operating condition of primary combustion structure and/or secondary after-combustion structure, for example adjust the after-combustion fuel flow of after-combustion nozzle 321 and the new trend flow of secondary supply-air outlet 322, guarantee the combustion effect of flue gas.
In an alternative embodiment, as shown in fig. 1, the primary combustion section 31 and the secondary afterburning section 32 are connected in a flange connection manner, so as to facilitate replacement and maintenance; further, the combustion chamber 3 may further include a settling section 33, the settling section 33 is connected to the bottom of the secondary afterburning section 32, so as to further improve the settling and dust removing effects of the flue gas, and the settling section 33 may also be connected to the secondary afterburning section 32 in a flange connection manner.
As a preferred embodiment, as shown in fig. 1, the combustion chamber 3 is disposed on the top of the settling chamber 1, so as to further compact the layout of the device, further reduce the floor area of the device and the usage amount of the flue, and further shorten the flue gas circulation path and the temperature drop loss of the flue gas.
Further preferably, as shown in fig. 1, the bottom of the combustion chamber 3 is also vertically inserted into the settling chamber 1, the flue gas outlet of the combustion chamber 3 is arranged at the bottom end of the combustion chamber, the flue gas at the outlet of the combustion chamber 3 needs to be changed from downward circulation to upward circulation to enter the settling chamber 1, and then from downward circulation to horizontal circulation, so that the effect of changing the flow direction of the flue gas for many times can be achieved, and the settling effect of the dust is better.
In one embodiment, the saturated steam generated by the steam drum 4 can be used for power generation, that is, the exhaust heat boiler 2 is connected with a steam turbine power generation mechanism, the exhaust steam of the steam turbine enters a condenser to be condensed into water, the heat absorbed by the condenser is cooled by a cooling tower, and the condensed water enters a deaerator again, so that a cycle for absorbing the heat of the flue gas and outputting electric energy is formed; the steam turbine may be a saturated steam turbine. In further embodiments, the heat generated by the combustion of the flue gas as described above may be used to heat the saturated steam into superheated steam, which may be a superheated steam power generation unit or other superheated steam users, such as a vacuum ejector pump for refining; correspondingly, a superheater 323 is preferably arranged in the combustion chamber 3, the superheater 323 is preferably a platen superheater 323, the saturated steam outlet of the steam drum 4 is connected to the superheater 323, and the superheater 323 is preferably arranged in the secondary afterburning section 32, preferably above the secondary air supply opening 322. Furthermore, a soot blower can be arranged above the superheater 323 in the combustion chamber 3 to periodically spray high-pressure nitrogen gas, so that the effect of soot deposition on the superheater 323 on the heat exchange efficiency and the service life is prevented.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a flue gas waste heat utilization equipment of compact, includes exhaust-heat boiler, its characterized in that: still include horizontal settling chamber, exhaust-heat boiler is vertical boiler, exhaust-heat boiler stands in the top of settling chamber and exhaust-heat boiler's bottom insert perpendicularly extremely in the settling chamber, exhaust-heat boiler's boiler flue gas entry is seted up in its bottom.
2. The compact flue gas waste heat utilization device according to claim 1, characterized in that: and a plurality of groups of flue gas heat exchange units are sequentially arranged in the waste heat boiler from bottom to top.
3. The compact flue gas waste heat utilization device according to claim 2, characterized in that: the waste heat boiler is provided with a steam drum, the uppermost flue gas heat exchange unit is an economizer, a water outlet of the economizer is communicated with a water inlet of the steam drum, a water outlet of the steam drum is respectively communicated with heat exchange medium inlets of other flue gas heat exchange units, and a saturated steam inlet of the steam drum is respectively communicated with heat exchange medium outlets of other flue gas heat exchange units.
4. The compact flue gas waste heat utilization device according to claim 1, characterized in that: the settling chamber is internally provided with a partition plate, the partition plate extends upwards from the bottom of the settling chamber, the top end of the partition plate is spaced from the top plate of the settling chamber, and a flue gas inlet of the settling chamber and the waste heat boiler are respectively arranged on the left side and the right side of the partition plate.
5. The compact flue gas waste heat utilization device according to claim 4, characterized in that: the top end of the baffle plate is positioned above the boiler flue gas inlet.
6. The compact flue gas waste heat utilization device according to claim 1, characterized in that: the device also comprises a combustion chamber, wherein a combustion structure for promoting combustible components in the flue gas to combust is arranged on the combustion chamber, and a combustion flue gas outlet of the combustion chamber is communicated with the settling chamber.
7. The compact flue gas waste heat utilization device according to claim 6, characterized in that: the combustion chamber is arranged on the top of the settling chamber.
8. The compact flue gas waste heat utilization device according to claim 7, characterized in that: the bottom of the combustion chamber is vertically inserted into the settling chamber, and the flue gas outlet of the combustion chamber is arranged at the bottom end of the combustion chamber.
9. The compact flue gas waste heat utilization device according to claim 6, characterized in that: the waste heat boiler is provided with a steam pocket, a superheater is arranged in the combustion chamber, and a saturated steam outlet of the steam pocket is communicated with a steam inlet of the superheater.
10. The compact flue gas waste heat utilization device according to claim 6, characterized in that: and an explosion-proof door is arranged on the combustion chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922181334.4U CN211425087U (en) | 2019-12-06 | 2019-12-06 | Compact flue gas waste heat utilization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922181334.4U CN211425087U (en) | 2019-12-06 | 2019-12-06 | Compact flue gas waste heat utilization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211425087U true CN211425087U (en) | 2020-09-04 |
Family
ID=72253323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922181334.4U Active CN211425087U (en) | 2019-12-06 | 2019-12-06 | Compact flue gas waste heat utilization device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211425087U (en) |
-
2019
- 2019-12-06 CN CN201922181334.4U patent/CN211425087U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201574162U (en) | Converter flue gas complementary-energy generating system with gas combustion device | |
| CN102537975B (en) | Circulating fluidized bed garbage incineration boiler and pollution control system with same | |
| CN101736117B (en) | Converter fume high-temperature bag dust removal and recycling and secondary steam recycling system | |
| CN110686521A (en) | Electric furnace flue gas waste heat utilization method and system | |
| CN106755718B (en) | The fume waste heat utilization and dust removal integrated system and technique that pneumatic steelmaking generates | |
| CN101539371B (en) | First flue gas dust removal and waste heat recovery system for electric stove | |
| CN106244175B (en) | Fume high-temperature carbon restores denitration and heat-energy recovering apparatus | |
| CN108980847B (en) | A kind of rubbish charing burning treatment process | |
| CN102788355B (en) | Turbulent-style hazardous waste pyrolysis incinerator | |
| CN101979951B (en) | Dry dedusting and sensible heat recovery system for electric furnace flue gas | |
| CN206093991U (en) | High -efficient recovery system of steelmaking electric furnace flue gas waste heat | |
| CN211012514U (en) | Flue gas treatment device and electric furnace flue gas utilization system | |
| CN106082571A (en) | Low heat value mud three change processes technique and device | |
| CN220057483U (en) | Optimized arrangement structure of small alkali recovery boiler | |
| CN211425087U (en) | Compact flue gas waste heat utilization device | |
| CN102252325B (en) | Circulating fluidized bed boiler capable of burning rice husks | |
| CN211012515U (en) | Electric furnace flue gas waste heat utilization system | |
| CN201066195Y (en) | Horizontal type reverse-combusting coal-firing boiler | |
| CN216047795U (en) | Biomass power generation tail gas processing apparatus | |
| CN102221212B (en) | Circular combustion furnace | |
| CN214612612U (en) | Converter flue gas treatment system | |
| CN211232888U (en) | Comprehensive treatment box for waste incineration flue gas | |
| CN112283681A (en) | Angle tube boiler with tail quenching heating surface | |
| CN206540144U (en) | Catalytic cracking flue gas processing unit | |
| CN201512508U (en) | High-efficiency water-gas generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |