CN206709040U - It is matched in the HTHP denitration waste heat boiler of catalytic cracking unit - Google Patents
It is matched in the HTHP denitration waste heat boiler of catalytic cracking unit Download PDFInfo
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- CN206709040U CN206709040U CN201720274926.9U CN201720274926U CN206709040U CN 206709040 U CN206709040 U CN 206709040U CN 201720274926 U CN201720274926 U CN 201720274926U CN 206709040 U CN206709040 U CN 206709040U
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- flue
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Abstract
The utility model discloses a kind of HTHP denitration waste heat boiler for being matched in catalytic cracking unit, including：First, second, 3rd, 4th flue, first flue is connected with the top of the second flue by horizontal flue, the lower end of second flue is connected with the lower end of the 3rd flue, the upper end of 3rd flue is connected with the upper end of the 4th flue, the bottom of first flue is connected with gas approach, burner is provided with the first flue above gas approach, front-packed evaporator is provided with horizontal flue, high-pressure superheater is provided with second flue, middle pressure superheater, evaporator, denitrification apparatus and high-pressure economizer are provided with 4th flue, 4th flue is connected with exhaust pass, top outside horizontal flue is provided with drum, the by-pass flue with by-passing valve is communicated with the second flue between middle pressure superheater and evaporator, by-pass flue is connected with the 3rd flue.The utility model has the advantage of：The height of high, the whole boiler plant of denitration efficiency is low.
Description
Technical field
It the utility model is related to boiler technology field, and in particular to be matched in the denitration waste heat boiler of catalytic cracking unit.
Background technology
Catalytic cracking is one of main method of oil secondary operation, in crude oil depth processing, is particularly converted in heavy oil
In, play very important effect.Catalytic cracking unit can give off substantial amounts of height during catalytic cracking reaction is carried out
Warm flue gas, carbon monoxide containing toxic gas in high-temperature flue gas（CO）And nitrogen oxides（NOX）, wherein nitrogen oxides is mainly including one
Nitrogen oxide, nitrogen dioxide, nitric acid mist etc..Carbon monoxide and nitrogen oxides are all the major pollutants of air.Low concentration one aoxidizes
Carbon can make one headache, dim eyesight, nausea, and high-concentration carbon monoxide can make one dead.The nitrogen oxides being emitted into air can be with sky
Water reaction generation nitric acid and nitrous acid in gas, and nitric acid and nitrous acid are exactly the main component of acid rain.Nitrogen oxides can stimulate
Human lung, human respiratory tract is damaged, causes human respiratory tract to infect, the influence to asthma sufferer is particularly evident.Nitrogen oxides
It can also cause the development of children lung impaired.
Denitration waste heat boiler is the key equipment of the high-temperature flue gas heat recovery of catalytic cracking unit discharge, to ensureing
Petroleum chemical enterprise's steam pipe system normal operation plays highly important effect.The high-temperature flue gas that catalytic cracking unit gives off enters de-
Need to carry out aftercombustion and denitration process in nitre waste heat boiler.Aftercombustion is used to remove the oxidation in high-temperature flue gas
Carbon.Denitration process is used to remove the nitrogen oxides in high-temperature flue gas, and usual denitration process is using the higher selectivity of denitration efficiency
Catalytic reduction method（SCR methods）, SCR methods be exactly in the presence of catalyst, using reducing agent selectively with high-temperature flue gas
Nitrogen oxides reacted, so as to by nitrogen oxides be reduced into nonhazardous effect nitrogen（N2）And water（H2O）.SCR methods use
Device be referred to as denitrification apparatus, the reactor equipped with catalyst is referred to as Benitration reactor in denitrification apparatus, in SCR methods also
Former agent can be ammonia, ammoniacal liquor or urea etc..
The denitration waste heat boiler for being matched in catalytic cracking unit at present is primarily present following defect：First, during denitration process, cigarette
The temperature of gas needs to control at 350 DEG C~400 DEG C, and the temperature of flue gas is too high to cause sintering of catalyst to inactivate, the temperature of flue gas
It is too low, the generation of ammonium salt can be caused, and operating mode is complex during denitration process, low when high during the temperature of flue gas, this leads
Cause denitration effect unsatisfactory.2nd, the steam that the denitration waste heat boiler provides at present is mainly used as generating electricity, and its steam pressure P=
3.82MPa, temperature t=420 DEG C, the steam belongs to medium temperature and medium pressure superheated steam, and actual power generation process shows HTHP
The generating efficiency of superheated steam is higher, therefore more than the high-temperature flue gas discharged to catalytic cracking unit of current denitration waste heat boiler
Efficiency of utilization needs further to be improved.3rd, the height of whole boiler plant is very high, and the catalysis such as to match with boiler plant is split
Change installed capacity increase, the height of whole boiler plant can reach more than 70 meters, and this causes the installation difficulty of boiler plant very big,
The maintenance in later stage, maintenance cost are also very high.
Utility model content
The utility model technical issues that need to address are：There is provided it is a kind of can effectively improve denitration efficiency be matched in catalysis
The HTHP denitration waste heat boiler of cracking unit.
To solve the above problems, the technical solution adopted in the utility model is：The high temperature for being matched in catalytic cracking unit is high
Pressure-off nitre waste heat boiler, including：The first flue, the second flue, the 3rd flue, the 4th flue being vertically arranged respectively, the first cigarette
Road is connected with the top of the second flue by horizontal flue, and the lower end of the second flue is connected with the lower end of the 3rd flue, the
The upper end of three flues is connected with the upper end of the 4th flue, and the bottom of the first flue is connected with gas approach, gas approach
Burner is provided with first flue of top, is provided with front-packed evaporator in horizontal flue, in the second flue from top to bottom according to
It is secondary to be provided with high-pressure superheater, middle pressure superheater, evaporator, from top to bottom it is disposed with denitrification apparatus and height in the 4th flue
Economizer is pressed, the 4th flue below high-pressure economizer is connected with exhaust pass, and the top outside horizontal flue is provided with drum,
By-pass flue is communicated with the second flue between middle pressure superheater and evaporator, by-pass flue is connected with the 3rd flue
It is logical, by-passing valve is provided with by-pass flue.
Further, the foregoing HTHP denitration waste heat boiler for being matched in catalytic cracking unit, wherein, high pressure saves coal
Device is fed water to drum, and drum feeds water to front-packed evaporator and evaporator, and the carbonated drink after being heated in front-packed evaporator and evaporator is mixed
Compound is back in drum, and the steam (vapor) outlet on drum is connected with the entrance of high-pressure superheater, high-pressure superheater output high pressure
Superheated steam.
Further, the foregoing HTHP denitration waste heat boiler for being matched in catalytic cracking unit, wherein, denitrification apparatus
Including：The ammonia-spraying grid and Benitration reactor being from top to bottom successively set in the 4th flue.
Further, the foregoing HTHP denitration waste heat boiler for being matched in catalytic cracking unit, wherein, described height
Pressure economizer is provided with level Four, is from top to bottom followed successively by：Level Four high-pressure economizer, three-level high-pressure economizer, two level high pressure save coal
Device and one-level high-pressure economizer, level Four high-pressure economizer feed water to drum.
Further, the foregoing HTHP denitration waste heat boiler for being matched in catalytic cracking unit, wherein, level Four is high
Pressure economizer, three-level high-pressure economizer, the heat exchanger tube in two level high-pressure economizer use spiral fin coil, every helical fin
The spacing of helical fin on pipe is that 10mm~20mm, the height of helical fin are 10mm~20mm；One-level high pressure saves coal
Heat exchanger tube in device uses square finned tube, and the spacing of adjacent prismatic fin is 10mm~20mm on every square finned tube.
Further, the foregoing HTHP denitration waste heat boiler for being matched in catalytic cracking unit, wherein, the second flue
Interior setting two-stage high-pressure superheater, is followed successively by two level high-pressure superheater and one-level high-pressure superheater, the steaming on drum from top to bottom
Vapor outlet is connected with the input of one-level high-pressure superheater, the output end output high pressure superheated steam of two level high-pressure superheater.
Further, the foregoing HTHP denitration waste heat boiler for being matched in catalytic cracking unit, wherein, the second flue
Superheater is pressed in interior setting two-stage, is followed successively by press in superheater and one-level in two level from top to bottom and presses superheater.
Further, the foregoing HTHP denitration waste heat boiler for being matched in catalytic cracking unit, wherein, the second flue
Lower end be connected by transition flue duct with the lower end of the 3rd flue.
The utility model has the advantages that：First, the height of whole boiler plant can be reduced to 50 meters or so, and this is not only significantly
The installation, maintenance, maintenance of boiler plant are facilitated, also effectively increases the stability of boiler plant.2nd, because there is provided bypass
Flue, the by-passing valve on by-pass flue can be opened when the temperature for entering to the high-temperature flue gas in the 4th flue is less than 350 DEG C, this
It can ensure that the temperature of the high-temperature flue gas into the 4th flue remains at 350 DEG C~400 DEG C, so as to greatly improve
Denitration efficiency, moreover it is possible to effectively extend the service life of catalyst, and reduce the operation and maintenance cost of Benitration reactor.
Brief description of the drawings
Fig. 1 is that the structure of the HTHP denitration waste heat boiler described in the utility model for being matched in catalytic cracking unit is shown
It is intended to.
Embodiment
The utility model is described in further detail with preferred embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, the HTHP denitration waste heat boiler of catalytic cracking unit is matched in, including：It is vertically arranged respectively
The first flue 3, the second flue 6, the 3rd flue 13, the 4th flue 15.The top of first flue 3 and the second flue 6 passes through water
Flat flue 4 is connected, and the lower end of the second flue 6 is connected with the lower end of the 3rd flue 13 by transition flue duct 12, the 3rd flue
13 upper end is connected with the upper end of the 4th flue 15.The bottom of first flue 3 is connected with gas approach 1, gas approach 1
Burner 2 is provided with first flue 3 of top, front-packed evaporator 5 is provided with horizontal flue 4.From up in second flue 6
Under be disposed with high-pressure superheater, it is middle pressure superheater, evaporator 9.In the present embodiment, two-stage high pressure is set in the second flue 6
Superheater, two level high-pressure superheater 72 and one-level high-pressure superheater 71 are followed successively by from top to bottom；Set in second flue 6 in two-stage
Superheater is pressed, is followed successively by press in two level from top to bottom and superheater 61 is pressed in superheater 62 and one-level.By up in 4th flue 15
Under be disposed with denitrification apparatus and high-pressure economizer, the 4th flue 15 below high-pressure economizer is connected with exhaust pass 18
It is logical.Top outside horizontal flue 4 is provided with drum 19, is connected on the second flue 6 between middle pressure superheater and evaporator 9
There is by-pass flue 11, by-pass flue 11 is connected with the 3rd flue 13.In the present embodiment, by-pass flue 11 connects presses in one-level
On the second flue 6 between superheater 61 and evaporator 9, by-passing valve 10 is provided with by-pass flue 11.
Denitrification apparatus includes in the present embodiment：From top to bottom it is successively set on ammonia-spraying grid 14 in the 4th flue 15 and de-
Nitre reactor 16, in order to ensure denitrating flue gas is complete, Benitration reactor 16 is provided with three layers.The present embodiment mesohigh economizer is set
Level Four is equipped with, is from top to bottom followed successively by：Level Four high-pressure economizer 174, three-level high-pressure economizer 173, two level high-pressure economizer 172
With one-level high-pressure economizer 171.Level Four high-pressure economizer 174, three-level high-pressure economizer 173, in two level high-pressure economizer 172
Heat exchanger tube uses spiral fin coil, and the spacing of the helical fin on every spiral fin coil is 10mm~20mm, spiral wing
The height of piece is 10mm~20mm；Heat exchanger tube in one-level high-pressure economizer 171 uses square finned tube, every square wing
The spacing of adjacent prismatic fin is 10mm~20mm on piece pipe.Although the heat exchange area and heat transfer effect of light pipe can not show a candle to spiral wing
Piece pipe and square finned tube, but because the particulate matter in high-temperature flue gas is more, in order to overcome the technical problem of heat exchanger tube dust stratification, pass
Heat exchanger tube generally use light pipe in the denitration waste heat boiler mesohigh economizer of system.And level Four high-pressure economizer in the present embodiment
174th, three-level high-pressure economizer 173, the heat exchanger tube in two level high-pressure economizer 172 are saved using spiral fin coil, one-level high pressure
Coal device 171 uses square finned tube, and the spacing of the helical fin on every spiral fin coil is controlled in 10mm~20mm, spiral shell
Revolve fin height control on 10mm~20mm, every square finned tube adjacent prismatic fin spacing control 10mm~
20mm, this just while the heat exchange efficiency of high-pressure economizer is greatly enhanced, solves the technical problem of heat exchanger tube dust stratification, also
The height of low whole boiler plant has effectively dropped.
Level Four high-pressure economizer 174 feeds water to drum 19 in the present embodiment, and drum 19 feeds water to front-packed evaporator 5 and evaporation
Steam water interface after being heated in device 9, front-packed evaporator 5 and evaporator 9 is back in drum 19.Steam (vapor) outlet on drum 19
It is connected with the input of one-level high-pressure superheater 71, the output end output high pressure superheated steam of two level high-pressure superheater 72.
The flue gas flow of denitration waste heat boiler described in the present embodiment is as follows：High-temperature flue gas caused by catalytic cracking unit from
Gas approach 1 is entered in the first flue 3, is lighted by burner 2 into the high-temperature flue gas in the first flue 3 and is fully fired
Burn, so as to remove CO.The high-temperature flue gas for eliminating CO is moved into horizontal flue 4 upwards, is entered in horizontal flue 4
High-temperature flue gas enters in the second flue 6 after carrying out heat exchange with front-packed evaporator 5.High-temperature flue gas in second flue 6 successively with
Pressed in two level high-pressure superheater 72, one-level high-pressure superheater 71, two level and superheater 61 and evaporator are pressed in superheater 62, one-level
9 carry out heat exchanges, and the high-temperature flue gas that heat exchange is completed with evaporator 9 enters to the through transition flue duct 12, the 3rd flue 13 successively
In four flues 15.The high-temperature flue gas entered in the 4th flue 15 passes through ammonia-spraying grid 14 and three layers of Benitration reactor 16 successively,
Reducing agent is selectively reacted with the nitrogen oxides in high-temperature flue gas in the presence of catalyst, so as to by high-temperature flue gas
In nitrogen oxides be reduced into nitrogen and water.Eliminate the high-temperature flue gas of nitrogen oxides again successively with level Four high-pressure economizer 174,
Three-level high-pressure economizer 173, two level high-pressure economizer 172 and one-level high-pressure economizer 171 carry out heat exchange, what heat exchange was completed
Flue gas is discharged from exhaust pass 18.Bypass cigarette is also communicated with the second flue 6 between middle pressure superheater 61 and evaporator 9
Road 11, the effect of by-pass flue 11 are：When the temperature for entering the high-temperature flue gas in the 4th flue 15 is less than 350 DEG C, bypass
By-passing valve 10 on flue 11 is opened, and so will some with pressing superheater 61 to complete the high-temperature flue gas of heat exchange in one-level
Enter directly from by-pass flue 11, through the 3rd flue 13 in the 4th flue 15, this can ensure that into the high temperature cigarette in the 4th flue
The temperature stabilization of gas is at 350 DEG C~400 DEG C, so as to effectively ensure the activity of the catalyst in three layers of Benitration reactor 16, significantly
Denitration efficiency is improved, and can effectively extend the service life of catalyst, reduces the operation and maintenance cost of Benitration reactor.
The carbonated drink flow of denitration waste heat boiler described in the present embodiment is as follows：Outside is fed water to one-level high-pressure economizer 171,
Water in one-level high-pressure economizer 171 saves through two level high-pressure economizer 172, three-level high-pressure economizer 173 and level Four high pressure successively
Coal device 174, water constantly absorb the heat in high-temperature flue gas through high-pressure economizers at different levels, and the output end of level Four high-pressure economizer 174 is defeated
Hot water part supply to the external device (ED) gone out is used, and another part is supplied to drum 19.A hot water part in drum 19 supplies
To front-packed evaporator 5, another part is supplied to evaporator 9.High-temperature flue gas is absorbed in front-packed evaporator 5 and evaporator 9
Heat and the steam water interface that is formed are back in drum 19 again.The high pressure separated by water separator in drum 19
Saturated vapor is sequentially entered to one-level high-pressure superheater 71 and two level high-pressure superheater 72, high-pressure saturated steam and pressed through in one-level height
The heat of high-temperature flue gas is constantly absorbed in hot device 71 and two level high-pressure superheater 72, the output end of two level high-pressure superheater 72 is then defeated
Go out high pressure superheated steam, the MPa of the pressure P of high pressure superheated steam=9.8, temperature t=540 DEG C, high pressure superheated steam output are used as
Generate electricity, generating efficiency is greatly enhanced.External middle pressure saturated vapor is sequentially entered in one-level and pressed in superheater 61 and two level
Superheater 62 is pressed, middle pressure saturated vapor presses to press in superheater 61 and two level in one-level constantly absorbs high-temperature flue gas in superheater 62
Heat, press in two level the output end of superheater 62 to press through vapours in then exporting, in press through pressure P=3.82 of vapours
MPa, temperature t=420 DEG C, vapours is pressed through in this can export and used for related device.
The utility model has the advantage of：First, four are vertically arranged and are sequentially connected the first logical flue 3, second respectively
Flue 6, the 3rd flue 13, the 4th flue 15, the flue structure can effectively reduce the height of whole boiler plant；Level Four high pressure saves
Coal device 174, three-level high-pressure economizer 173, the heat exchanger tube in two level high-pressure economizer 172 are high using spiral fin coil, one-level
Pressure economizer 171 uses square finned tube, and this can greatly improve the heat exchange efficiency of high-pressure economizer, and further can effectively reduce
The height of boiler plant, the height of whole boiler plant can be reduced to 50 meters or so described in the present embodiment, and this is not only big generous
Boiler plant installation, maintenance, maintenance, also effectively increase the stability of boiler plant.The 2nd, by-pass flue 11 is set,
By-passing valve 10 on by-pass flue 11 can be opened when the temperature of the high-temperature flue gas in the 4th flue is less than 350 DEG C, and in one-level
Some can be directly entered in the 4th flue 15 high-temperature flue gas of the pressure completion heat exchange of superheater 61, and this can ensure that into the 4th
The temperature stabilization of high-temperature flue gas in flue is at 350 DEG C~400 DEG C, so as to effectively ensure the catalysis in three layers of Benitration reactor 16
The activity of agent, denitration efficiency is greatly improved, and can effectively extend the service life of catalyst, reduce the operation of Benitration reactor 16
Maintenance cost.3rd, the MPa of high-pressure superheater energy output pressure P=9.8, the high pressure superheated steam of temperature t=540 DEG C, in press through heat
The MPa of device energy output pressure P=3.82, temperature press through vapours in t=420 DEG C, and this causes the high-temperature flue gas of catalytic cracking unit
Utilization rate of waste heat be further enhanced.
Claims (8)
1. it is matched in the HTHP denitration waste heat boiler of catalytic cracking unit, it is characterised in that：Including：It is vertically arranged respectively
First flue, the second flue, the 3rd flue, the 4th flue, the first flue are connected with the top of the second flue by horizontal flue
Logical, the lower end of the second flue is connected with the lower end of the 3rd flue, and the upper end of the 3rd flue is connected with the upper end of the 4th flue,
The bottom of first flue is connected with gas approach, and burner, horizontal cigarette are provided with the first flue above gas approach
Front-packed evaporator is provided with road, is disposed with high-pressure superheater, middle pressure superheater, evaporation in the second flue from top to bottom
Device, is from top to bottom disposed with denitrification apparatus and high-pressure economizer in the 4th flue, the 4th flue below high-pressure economizer
It is connected with exhaust pass, the top outside horizontal flue is provided with drum, and second between middle pressure superheater and evaporator
By-pass flue is communicated with flue, by-pass flue is connected with the 3rd flue, and by-passing valve is provided with by-pass flue.
2. the HTHP denitration waste heat boiler according to claim 1 for being matched in catalytic cracking unit, it is characterised in that：
High-pressure economizer feeds water to drum, and drum feeds water to front-packed evaporator and evaporator, after being heated in front-packed evaporator and evaporator
Steam water interface be back in drum, the steam (vapor) outlet on drum is connected with the entrance of high-pressure superheater, high-pressure superheater
Export high pressure superheated steam.
3. the HTHP denitration waste heat boiler according to claim 1 for being matched in catalytic cracking unit, it is characterised in that：
Denitrification apparatus includes：The ammonia-spraying grid and Benitration reactor being from top to bottom successively set in the 4th flue.
4. the HTHP denitration waste heat boiler according to claim 2 for being matched in catalytic cracking unit, it is characterised in that：
Described high-pressure economizer is provided with level Four, is from top to bottom followed successively by：Level Four high-pressure economizer, three-level high-pressure economizer, two level
High-pressure economizer and one-level high-pressure economizer, level Four high-pressure economizer feed water to drum.
5. the HTHP denitration waste heat boiler according to claim 4 for being matched in catalytic cracking unit, it is characterised in that：
Level Four high-pressure economizer, three-level high-pressure economizer, the heat exchanger tube in two level high-pressure economizer use spiral fin coil, every spiral shell
The spacing of helical fin on rotation finned tube is that 10mm~20mm, the height of helical fin are 10mm~20mm；One-level is high
Heat exchanger tube in pressure economizer use square finned tube, on every square finned tube the spacing of adjacent prismatic fin be 10mm~
20mm。
6. the HTHP denitration waste heat boiler according to claim 2 for being matched in catalytic cracking unit, it is characterised in that：
Two-stage high-pressure superheater is set in the second flue, is followed successively by two level high-pressure superheater and one-level high-pressure superheater, vapour from top to bottom
The steam (vapor) outlet wrapped is connected with the input of one-level high-pressure superheater, and the output end output height of two level high-pressure superheater presses through
Vapours.
7. the HTHP denitration waste heat boiler according to claim 1 for being matched in catalytic cracking unit, it is characterised in that：
Set in second flue in two-stage and press superheater, be followed successively by press in superheater and one-level in two level from top to bottom and press superheater.
8. the HTHP denitration waste heat boiler according to claim 1 for being matched in catalytic cracking unit, it is characterised in that：
The lower end of second flue is connected by transition flue duct with the lower end of the 3rd flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720274926.9U CN206709040U (en) | 2017-03-21 | 2017-03-21 | It is matched in the HTHP denitration waste heat boiler of catalytic cracking unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720274926.9U CN206709040U (en) | 2017-03-21 | 2017-03-21 | It is matched in the HTHP denitration waste heat boiler of catalytic cracking unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206709040U true CN206709040U (en) | 2017-12-05 |
Family
ID=60470135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720274926.9U Withdrawn - After Issue CN206709040U (en) | 2017-03-21 | 2017-03-21 | It is matched in the HTHP denitration waste heat boiler of catalytic cracking unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN206709040U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949446A (en) * | 2017-03-21 | 2017-07-14 | 苏州海陆重工股份有限公司 | It is matched in the HTHP denitration waste heat boiler of catalytic cracking unit |
| CN109222631A (en) * | 2018-11-20 | 2019-01-18 | 嘉善德海厨房设备有限公司 | A kind of steam generator for steamer |
| CN111495175A (en) * | 2019-01-30 | 2020-08-07 | 三菱日立电力系统株式会社 | Exhaust gas treatment device |
-
2017
- 2017-03-21 CN CN201720274926.9U patent/CN206709040U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949446A (en) * | 2017-03-21 | 2017-07-14 | 苏州海陆重工股份有限公司 | It is matched in the HTHP denitration waste heat boiler of catalytic cracking unit |
| WO2018171098A1 (en) * | 2017-03-21 | 2018-09-27 | 苏州海陆重工股份有限公司 | High-temperature and high-pressure denitration waste heat boiler mated with catalytic cracking unit |
| CN106949446B (en) * | 2017-03-21 | 2019-02-05 | 苏州海陆重工股份有限公司 | It is matched in the high temperature and pressure denitration waste heat boiler of catalytic cracking unit |
| CN109222631A (en) * | 2018-11-20 | 2019-01-18 | 嘉善德海厨房设备有限公司 | A kind of steam generator for steamer |
| CN109222631B (en) * | 2018-11-20 | 2024-02-27 | 嘉善德海厨房设备有限公司 | Steam generator for steaming cabinet |
| CN111495175A (en) * | 2019-01-30 | 2020-08-07 | 三菱日立电力系统株式会社 | Exhaust gas treatment device |
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