CN204165062U - Exhaust gas treating device in a kind of formaldehyde plant - Google Patents
Exhaust gas treating device in a kind of formaldehyde plant Download PDFInfo
- Publication number
- CN204165062U CN204165062U CN201420531270.0U CN201420531270U CN204165062U CN 204165062 U CN204165062 U CN 204165062U CN 201420531270 U CN201420531270 U CN 201420531270U CN 204165062 U CN204165062 U CN 204165062U
- Authority
- CN
- China
- Prior art keywords
- exhaust gas
- hot water
- air
- burner
- outlet
- 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.)
- Expired - Fee Related
Links
Landscapes
- Incineration Of Waste (AREA)
Abstract
The utility model discloses the exhaust gas treating device in a kind of formaldehyde plant, comprise set gradually from bottom to up burning zone, middle part heat exchanging segment, top hot water section, heat exchange of top part section and chimney segment, described burning zone is provided with round pie burner, and this round pie burner is provided with air intlet and inlet exhaust gas; The top of the water flow passage of described middle part heat exchanging segment is provided with steam gas outlet, and bottom is provided with water inlet of hot water; The water flow passage of described top hot water section is provided with water inlet and hot water outlet, and this hot water outlet is communicated with by the water inlet of hot water of pipeline with middle part heat exchanging segment; Described heat exchange of top part section adopts plate type heat exchanger, and is provided with the passage being respectively used to ventilating air and tail gas, and the outlet of this passage is communicated with inlet exhaust gas with the air intlet of round pie burner respectively.The utility model makes the mixing of air and combustion gas relatively even; Fully high efficiente callback utilizes the waste heat of flue gas simultaneously, reduces energy consumption and steam use amount.
Description
Technical field
The utility model belongs to chemical production technology and equipment technical field, relates generally to the exhaust gas treating device for Formaldehyde Production.
Background technology
The tail gas that silver formaldehyde production absorption tower is discharged contains the hydrogen of about 16% ~ 21%, also contain: CO, CO2, N2, CH4 etc., its calorific value is about 2000kJ/m3, and we adopt the mode of burning to eliminate the pollution of tail gas to environment, and utilize the heat energy of burning to produce steam.
Traditional exhaust gas treating device is primarily of the composition such as air distributor, gas distributor, combustion chamber (general formaldehyde plant configuration formaldehyde tray for combustion), heat exchanging segment, chimney.Dividing for heat exchanging segment is belong to pressure vessel, and its structure is divided into two kinds: " bushing type " and " shell and tube ".
Adopt the defect of traditional exhaust gas treating device: 1, due to " air distributor " and " gas distributor " inside combustion chamber separate distant, so degree of mixing is bad, cause burning insufficient.2, the Gas Components inside tail gas does not also burn completely, and combustion journey is partially short, and flue gas just enters heat exchanging segment and stops reaction, so the combustible component also containing 30% in flue gas has not reacted, just enters air.3, the fire box temperature of combustion chamber only has about 500 DEG C.4, do not adopt the exhaust gas temperature of the exhaust gas treating device of hot water section higher, generally have about 220 DEG C, heat energy does not make full use of.5, byproduct steam amount is on the low side, and the byproduct steam of general exhaust gas treating device is: 0.26t/t (formalin 37% concentration), steam pressure 0.4 ~ 0.6Mpa.The manufacturer needing downstream product for there being formaldehyde plant and need steam consumption larger, often can not meet requirement.
Summary of the invention
Goal of the invention: for above-mentioned Problems existing and defect, the utility model provides the exhaust gas treating device in a kind of formaldehyde plant, improves the difficult problem mixed of air and fuel gas, makes the mixing of air and combustion gas relatively even; Fully high efficiente callback utilizes the waste heat of flue gas simultaneously, reduces energy consumption and steam use amount.
Technical scheme: for achieving the above object, the utility model by the following technical solutions: the exhaust gas treating device in a kind of formaldehyde plant, comprise set gradually from bottom to up burning zone, middle part heat exchanging segment, top hot water section, heat exchange of top part section and chimney segment,
Described burning zone is provided with round pie burner, and this round pie burner is provided with air intlet and inlet exhaust gas, and burning zone top is provided with the flue gas rising mouth be communicated with middle part heat exchanging segment flue gas flow channel;
The top of the water flow passage of described middle part heat exchanging segment is provided with steam gas outlet, and bottom is provided with water inlet of hot water, and this water inlet of hot water is communicated with the drum of hot-water supply;
The water flow passage of described top hot water section is provided with water inlet and hot water outlet, and this hot water outlet is communicated with by the water inlet of hot water of pipeline with middle part heat exchanging segment;
Described heat exchange of top part section adopts plate type heat exchanger, and is provided with the passage being respectively used to ventilating air and tail gas, and the outlet of this passage is communicated with inlet exhaust gas with the air intlet of round pie burner respectively;
The passage of flue gas of circulating in described burning zone, middle part heat exchanging segment, top hot water section, heat exchange of top part section and chimney segment is through.
As preferably, in described burning zone, be also provided with useless methyl alcohol shower nozzle.
As preferably, the height of described burning zone can guarantee that air passes the required time at 0.8 ± 0.1s.
Further, described round pie burner comprises setting up and down and in the air chamber of round pie with exhaust gas chamber, described air intlet and inlet exhaust gas are located at the side of air chamber and exhaust gas chamber respectively; Intensive pipeline is evenly provided with in described exhaust gas chamber, this intensive pipeline one end is communicated with air chamber, the other end exposes the upper surface of exhaust gas chamber, and described exhaust gas chamber upper surface is also provided with the offgas outlet of intensive layout, and this offgas outlet is crisscross arranged with the intensive pipeline Homogeneous phase mixing exposing exhaust gas chamber upper surface.Sent from burning cake by the intensive pipeline of upper strata cake burner after air enters the cake burner of lower floor, now tail gas enter upper strata cake burner from and from the offgas outlet of upper surface out, burn after cake superficial air and tail gas fully mix.
Beneficial effect: compared with prior art, the utility model has the following advantages: the difficult problem mixed 1, improving air and fuel gas, makes the mixing of air and combustion gas relatively even; 2, improve the problem that exhaust gas treating device combustion chamber combustion journey is partially short, make burner hearth gas fuel burning more abundant; 3, utilize out the heat of " hot water section " flue gas, increase special stainless steel plate type heat exchanger, add hot-air and fuel gas, improve the initial temperature of burner hearth, reaching fire box temperature is about 800 ~ 950 DEG C; 4, the final exhaust gas temperature of exhaust gas treating device is set as about 130 DEG C, and such heat energy is fully utilized; 5, remove former burning to give up the tray for combustion of methyl alcohol, changing the useless methyl alcohol burning of spraying into, make sufficient combustion and more economically; 6, require that the byproduct steam amount of exhaust gas treating device reaches: 0.42t/t (formalin 37% concentration).
Accompanying drawing explanation
Fig. 1 is the structural representation of exhaust gas treating device described in the utility model.
Wherein, burning zone 1, middle part heat exchanging segment 2, top hot water section 3, heat exchange of top part section 4, chimney segment 5, air intlet 6, inlet exhaust gas 7, round pie burner 8, methyl alcohol shower nozzle 9.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, illustrate the utility model further, these embodiments should be understood and be only not used in restriction scope of the present utility model for illustration of the utility model, after having read the utility model, the amendment of those skilled in the art to the various equivalent form of value of the present utility model has all fallen within the application's claims limited range.
As shown in Figure 1, the utility model provides the exhaust gas treating device in a kind of formaldehyde plant, comprise set gradually from bottom to up burning zone, middle part heat exchanging segment, top hot water section, heat exchange of top part section and chimney segment:
Bottom is burning zone, round pie burner Main Function inside burning zone is to make the mist after heating within the shortest time, mixing is fully obtained at round pie burner surface, take fire inside burning zone at once after mixing, according to the relevant data that burning is clean, time fire box temperature must reach 750 DEG C, the hydrogen in tail gas can burn totally completely, and the temperature of the highest burning of design is decided to be 950 DEG C.
The determination of burning zone length: suppose that air does not compress, be 0.8s by the time of burner hearth, the burner hearth effective length required for calculating is about 4.05m, and general burner hearth Design of length is 4m, sufficient combustion, requires the lower perforated plate not licking " middle part heat exchanging segment " at the tongues of fire position of combustion chamber.The effect of middle part heat exchanging segment absorbs the flue gas heat produced from burning zone, by heat exchange, produces byproduct steam.The effect of top hot water section absorbs the middle part heat exchanging segment flue gas heat of about 350 DEG C out, the soft water by shell side is heated to 70 ~ 90 DEG C, feeds water for middle part heat exchanging segment.Top heat exchanger adopts stainless steel plate type heat exchanger, and its effect is to preheat tail gas and air, and object is to utilize the flue-gas temperature of discharge to improve the initial temperature that tail gas and air enter round pie burner.According to calculating and design, make initial temperature by normal temperature, generally consider 20 ~ 30 DEG C, bring up to about 100 ~ 105 DEG C.Eventually through the flue-gas temperature 130 ~ 140 DEG C of chimney breast.
Below simply technological process is introduced:
Absorb from formaldehyde plant the tail gas that two towers come, the stainless steel plate type heat exchanger section first entering top carries out preheating, and the temperature of coming in is: 20 ~ 30 DEG C, and the temperature of going out brings up to about 100 ~ 105 DEG C.Oxygen required for exhaust gas treating device gas fuel burning is provided by air-blaster C0203, first be also enter top " stainless steel plate type heat exchanger section " to carry out preheating, the temperature of coming in is: 20 ~ 30 DEG C, and the temperature of going out brings up to about 100 ~ 105 DEG C.
Entered the air of preheating, round pie burner that tail gas enters base burning section mixes, and in the burning of round pie burner surface, fire box temperature is about about 950 DEG C.
Tail gas and air gas mixture are after base burning section all burnt, and the flue gas of 950 DEG C, by top heat exchanging segment (being the cylinder fixed tube sheet heat exchanger of one section of pressure-bearing), when going out " middle part heat exchanging segment ", flue-gas temperature is about 350 DEG C." middle part heat exchanging segment " top arranges steam gas outlet, and bottom arranges water inlet of hot water.The steam produced after hot water vaporization, by steam gas outlet, tedge leads to drum, and the hot water of drum, flows to hot water inlet by down-comer, cyclic like this, take away the flue gas heat by middle part heat exchanging segment simultaneously.
Then temperature is that the flue gas of about 350 DEG C enters top hot water section (being also the cylinder fixed tube sheet heat exchanger of one section of pressure-bearing), the soft water inside shell side is made to be heated to 70 ~ 90 DEG C, for the feedwater of middle part heat exchanging segment, the flue-gas temperature that tube side goes out top hot water section is about 220 DEG C.
Then temperature is that the flue gas of about 350 DEG C enters top stainless steel plate type heat exchanger section, and the effect of top stainless steel plate type heat exchanger is mainly used in adding hot exhaust gas and air, is heated to about 100 ~ 105 DEG C; The flue-gas temperature going out top stainless steel plate type heat exchanger section is about 130 DEG C, enters air by chimney.
The effect of drum is deposited the soft water of dress certain capacity and deposit the steam of dress certain capacity, the effect played a buffering and store, according to the steam pressure that need of production setting is discharged.
Whole exhaust gas treating device system passes through automation mechanized operation, and operative employee that need not be special is easy to operate.Insulating equipment material adopts alumina silicate, burning zone inside to adopt refractory brick or fire-resistant pouring material, and shell adopts carbon steel.Chimney position adopts high temperature resistant paint (heatproof is higher than 200 DEG C).
The utility model compares existing equipment and technological advantage is as follows:
1, traditional exhaust gas treating device byproduct steam is: 0.26t/t (formalin 37% concentration), steam pressure 0.4 ~ 0.6Mpa; Exhaust gas treating device byproduct steam of the present utility model is: 0.42t/t (formalin 37% concentration), steam pressure 0.4 ~ 0.6Mpa; Formalin per ton has more 0.16t/t (formalin 37% concentration), market price steam price per ton 0.018 ten thousand yuan, the novel exhaust gas treating device of a set of 200,000 tons of formaldehyde plants can create benefit 5,760,000 yuan every year, and economic benefit is fairly obvious.
2, novel exhaust gas treating device sufficient combustion, the component key component entering air is:
The utility model is reasonable in design, non-environmental-pollution problem.
3, whole exhaust gas treating device system is by automation mechanized operation, and operative employee that need not be special, operation side is easy.
Claims (4)
1. the exhaust gas treating device in formaldehyde plant, is characterized in that: comprise set gradually from bottom to up burning zone, middle part heat exchanging segment, top hot water section, heat exchange of top part section and chimney segment,
Described burning zone is provided with round pie burner, and this round pie burner is provided with air intlet and inlet exhaust gas, and burning zone top is provided with the flue gas rising mouth be communicated with middle part heat exchanging segment flue gas flow channel;
The top of the water flow passage of described middle part heat exchanging segment is provided with steam gas outlet, and bottom is provided with water inlet of hot water, and this water inlet of hot water is communicated with the drum of hot-water supply;
The water flow passage of described top hot water section is provided with water inlet and hot water outlet, and this hot water outlet is communicated with by the water inlet of hot water of pipeline with middle part heat exchanging segment;
Described heat exchange of top part section adopts plate type heat exchanger, and is provided with the passage being respectively used to ventilating air and tail gas, and the outlet of this passage is communicated with inlet exhaust gas with the air intlet of round pie burner respectively;
The passage of flue gas of circulating in described burning zone, middle part heat exchanging segment, top hot water section, heat exchange of top part section and chimney segment is through.
2. the exhaust gas treating device according to claim 1 in formaldehyde plant, is characterized in that: be also provided with useless methyl alcohol shower nozzle in described burning zone.
3. the exhaust gas treating device according to claim 1 in formaldehyde plant, is characterized in that: the height of described burning zone can guarantee that air passes the required time at 0.8 ± 0.1s.
4. the exhaust gas treating device according to claim 1 in formaldehyde plant, it is characterized in that: described round pie burner comprises setting up and down and in the air chamber of round pie with exhaust gas chamber, described air intlet and inlet exhaust gas are located at the side of air chamber and exhaust gas chamber respectively; Intensive pipeline is evenly provided with in described exhaust gas chamber, this intensive pipeline one end is communicated with air chamber, the other end exposes the upper surface of exhaust gas chamber, and described exhaust gas chamber upper surface is also provided with the offgas outlet of intensive layout, and this offgas outlet is crisscross arranged with the intensive pipeline Homogeneous phase mixing exposing exhaust gas chamber upper surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420531270.0U CN204165062U (en) | 2014-09-16 | 2014-09-16 | Exhaust gas treating device in a kind of formaldehyde plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420531270.0U CN204165062U (en) | 2014-09-16 | 2014-09-16 | Exhaust gas treating device in a kind of formaldehyde plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204165062U true CN204165062U (en) | 2015-02-18 |
Family
ID=52538746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420531270.0U Expired - Fee Related CN204165062U (en) | 2014-09-16 | 2014-09-16 | Exhaust gas treating device in a kind of formaldehyde plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204165062U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104266200A (en) * | 2014-09-16 | 2015-01-07 | 江苏凯茂石化科技有限公司 | Tail gas processor in formaldehyde device |
| CN113074379A (en) * | 2021-03-30 | 2021-07-06 | 龙南鑫坤无机新材料有限公司 | Equipment for removing nitrogen oxide at high temperature |
-
2014
- 2014-09-16 CN CN201420531270.0U patent/CN204165062U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104266200A (en) * | 2014-09-16 | 2015-01-07 | 江苏凯茂石化科技有限公司 | Tail gas processor in formaldehyde device |
| CN113074379A (en) * | 2021-03-30 | 2021-07-06 | 龙南鑫坤无机新材料有限公司 | Equipment for removing nitrogen oxide at high temperature |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104266200A (en) | Tail gas processor in formaldehyde device | |
| CN203668319U (en) | Biomass gasifying device | |
| CN208200391U (en) | The system for preparing coupling synthesis gas power generation for active carbon | |
| CN101629108B (en) | Method for preparing coal gas through gasification of pulverized coal | |
| CN202022857U (en) | Dry-method sulfur fixing and sucking integrated calcining cement clinker system | |
| CN101649215B (en) | Hot carrier preparing and heating device in externally-fired oil shale distillation process | |
| CN207648835U (en) | A kind of boiler exhaust gas waste heat recovery heat supply three towers unification heat transfer spray tower | |
| CN204165062U (en) | Exhaust gas treating device in a kind of formaldehyde plant | |
| CN204756903U (en) | Living beings combustion apparatus that partly gasifies | |
| CN106925106A (en) | Wet desulphurization method in a kind of CFB boiler stove | |
| CN206692591U (en) | A kind of U-shaped black reactor device of production of carbon black | |
| CN204661619U (en) | The device that a kind of vertical high-temperature cracking static bed coal gasification raw gas is coal-tar middle oil | |
| CN201885569U (en) | Energy-saving comprehensive heating furnace for using coke-oven gas to make methanol with side convection sections at sides of two radiation chambers | |
| CN102337161B (en) | Low water-to-gas ratio serial saturation tower and hot water tower CO conversion process | |
| CN103074111B (en) | Equipment and technology for producing synthesis gas through cooperating outer cylinder air gasification with inner cylinder steam gasification | |
| CN109163338A (en) | A kind of method and device handling liquid nitrogen washing tail-gas | |
| CN106629631B (en) | A kind of the sulfur waste cleavage systems and technique of oxygen-enriched combustion-supporting | |
| CN104178234A (en) | Method and system for preparing natural gas from coke oven gas and generator gas and utilizing waste heat | |
| CN201367419Y (en) | Pre-heated multilevel air distribution fixed bed straw gasification device | |
| CN105733685B (en) | Biomass gasifying furnace | |
| CN203653232U (en) | System for cogeneration of synthesis gas employing methane non-catalytic partial oxidation and methane steam transformation | |
| CN103693616B (en) | The method and system of methane non-catalytic partial oxidation and methane steam reforming co-production synthesis gas | |
| CN114657305A (en) | Energy gradient utilization system and method for coupling production of gas-based shaft furnace and coke oven | |
| CN204400923U (en) | A kind of gasifying biomass multi-joint-production apparatus | |
| CN210261104U (en) | Carbon monoxide conversion device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20200916 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |