CN105709556A - Energy-saving and environment-friendly exhaust gas treatment system and treatment method for formaldehyde production - Google Patents
Energy-saving and environment-friendly exhaust gas treatment system and treatment method for formaldehyde production Download PDFInfo
- Publication number
- CN105709556A CN105709556A CN201610220439.4A CN201610220439A CN105709556A CN 105709556 A CN105709556 A CN 105709556A CN 201610220439 A CN201610220439 A CN 201610220439A CN 105709556 A CN105709556 A CN 105709556A
- Authority
- CN
- China
- Prior art keywords
- steam
- flue gas
- blender
- gas
- formaldehyde
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
Abstract
The invention relates to the field of production of chemical products, in particular to an energy-saving and environment-friendly exhaust gas treatment system and treatment method for formaldehyde production. The system comprises an exhaust gas boiler and a mixer, wherein a steam treatment device is connected between the exhaust gas boiler and the mixer; a smoke treatment device is arranged between the exhaust gas boiler and the mixer; the smoke treatment device comprises a water scrubber, a steam-water separator, an air blower, a smoke heater and a smoke filter which are in series connection sequentially. The energy-saving and environment-friendly exhaust gas treatment system and treatment method for formaldehyde production have the benefits as follows: exhaust gas produced in the formaldehyde production process can be effectively used, emission of the exhaust gas is reduced, and accordingly, pollution to the environment is reduced; besides, the resource utilization rate is increased, and the production cost is reduced.
Description
Technical field
The present invention relates to chemical products production field, be specifically related to a kind of energy saving and environment friendly exhaust treatment system for Formaldehyde Production and processing method.
Background technology
At present, more than the formaldehyde of industrial production it is all with methanol for raw material, adopts methanol air oxidizing process to prepare, mainly have two kinds of approach, namely methanol catalytic oxidation dehydriding and only through methanol oxidation method, methanol oxidative dehydrogenation and methanol is taked to aoxidize merely all with the oxygen in air for oxidant；Only through methanol oxidation method then adopts the mode of air excess；But, no matter take which kind of method, have substantial amounts of water to generate, all with formalin for final products, water content Chang Gaoda more than 50%.
In prior art, the vent gas treatment for preparing formaldehyde requires over exhaust gas treating device and heater exhaust gas, and heater exhaust gas is to be heated by steam, and required steam is generated by steamdrum；Prepare the hot water produced in formaldehyde process and pass into steamdrum, steamdrum provides hot water for exhaust gas treating device, hot water is passed into steamdrum by combustion tail gas by exhaust gas treating device, most of steam in steamdrum is distributed to air heater and steam heater by the steam distributor parallel connection respectively connected, finally enter blender recycling, but the tail gas treatment process of this exhaust gas treating device imperfection, can not effectively utilize tail gas, and tail gas can not be carried out remove impurity, the techniques such as absorption, environment degree is big, in a mixer, the content of steam is excessive, the subsequent process preparing formaldehyde be will also result in impact, production cost remains high.In order to improve the utilization rate of the produced tail gas of formaldehyde production, reduce into product cost, improve resource utilization, it is provided that a kind of technique that can solve these problems is very necessary.
Summary of the invention
Present invention aims to the defect of above-mentioned existence and a kind of energy saving and environment friendly exhaust treatment system for Formaldehyde Production and processing method are provided, can effectively utilize and produce the tail gas produced in formaldehyde process, reduce exhaust emissions amount, reduce the pollution to environment, simultaneously, improve resource utilization, reduce production cost.
Technical scheme is as follows:
A kind of energy saving and environment friendly exhaust treatment system for Formaldehyde Production, including tail gas boiler and blender, it is connected to equipment for steam treatment between tail gas boiler and blender, for processing the steam that tail gas boiler produces, this equipment for steam treatment is made up of the steamdrum being sequentially connected in series, steam distributor and steam heater, wherein steamdrum is connected with tail gas boiler, and steam heater is connected with blender；The flue gas processing device in parallel with equipment for steam treatment it is additionally provided with between tail gas boiler and blender；Flue gas processing device is made up of the water scrubber being sequentially connected in series, steam-water separator, aerator, flue gas heater and smoke filter, and wherein water scrubber is connected with tail gas boiler by chimney, and smoke filter is connected with blender.
Above-mentioned blender includes methanol gas and water steam, air, flue gas.
Preferably, above-mentioned aerator is Roots blower, and the advantage of Roots blower is:
(1) there is stable pumping speed, the gas of releasing suddenly can be discharged rapidly, compensate for the deficiency of oil sealing mechanical pump and diffusion pump, the flue gas in its body can be discharged into rapidly in the present invention, be conducive to quickly carrying out next step operation；
(2) advanced design, rational in infrastructure, all there is gap between rotor and between rotor and the pump housing, be not in contact with each other, need not lubricate, friction loss is little, and available relatively low power obtains bigger pumping speed, has significant energy-saving effect；
(3) there is not gas compression in pump chamber, between movement parts, have gap in addition, to insensitive from the dust in the flue gas in steam-water separator and water vapour in the present invention, therefore can extract coercibility steam out；
(4) without air inlet and exhaust valve, simple in construction, noise is relatively low, and in pump chamber, movement parts is not in contact with each other, and is hardly damaged, and maintenance cost is low.
The height of the chimney in the present invention is 10-15m, air-vent is had bottom chimney, there is autocontrol valve group at air-vent place, the height of chimney is suitable corresponding mutually with the height of water scrubber, the design of air-vent and autocontrol valve group is conducive to regulating the flow velocity flowing out flue gas from chimney, controlling fume treatment progress, the flue-gas temperature discharged from chimney is 90-110 DEG C.
The above-mentioned Process ba-sis preparing formaldehyde there are following steps:
(1) first the tail gas produced in formaldehyde production and treated soft water are mixed in tail gas boiler；
(2)) mixed tail gas and soft water heat burning generation steam and flue gas in tail gas boiler, and steam therein sequentially passes through steamdrum, steam distributor finally enters blender；Flue gas is through chimney, and the flue gas having volume fraction to be 10%-50% enters air, and residue flue gas sequentially passes through water scrubber, steam-water separator, aerator, flue gas heater, smoke filter from chimney, finally arrives blender；
(3) steam and flue gas after arriving blender use as the feedstock circulation preparing formaldehyde.
The gas emitted from formaldehyde plant processing method of the present invention, the flue gas after being processed by smoke filter, temperature is 90-100 DEG C.
In above-mentioned gas emitted from formaldehyde plant processing method, after flue gas enters blender, the volume fraction of the water vapour in blender is 10%.
The design focal point of the present invention is: by the improvement to existing technique, and hazardous solid micronic dust and harmful ion in flue gas are removed, and in flue gas, main component is nitrogen, water vapour, also has the oxygen of 1-2%, the formaldehyde gas of 0.01-0.1%, the CO of 0.1-0.2%2Gas, the micronic dust such as dust, iron ion, and these solid micronic dusts and harmful ion are prone to the roller of corrosion Roots blower, destroy lubricating system, dust enters system after stain catalyst, makes the consumption of raw material formaldehyde improve.
In the present invention, the effect of each equipment is as follows with technological requirement in a device:
(1) effect of water scrubber: mainly washing the micronic dust in flue gas impurity off, such as iron ion, the steam having volume fraction to be 90% in flue gas is dissolved in washings, reduces the temperature of gas；In water scrubber it is important that control the quality of water, even distribution and reverse absorbability, flue gas is after cleaning and removing micronic dust, and flue gas is 60 DEG C in the temperature of outlet, and foreign body fraction is lower than 0.01%.
(2) steam-water separator: out flue gas with water removes more than 85-95% moisture and part heavy seeds with this equipment from water scrubber, wherein heavy seeds is the volume granule more than 80 orders, this equipment emphasis be control Roots blower rotate the position of discharge outlet in wind speed and water scrubber
Technological requirement: after leaving steam-water separator, the moisture of flue gas is not more than 10%.
(3) flue gas heater: adopting Combined type heating device, in technological requirement flue gas heater, heating-up temperature is 95-110 DEG C, and pressure is 10-40kpa, after heating, flue gas enters smoke filter.
(4) smoke filter: filter out micronic dust and moisture, in filter process, in order to improve the function of smoke filter, adopts tangential entrance, technological requirement: leaving the moisture of flue gas after steam-water separator, lower than 5%, is zero more than 80 order granule micronic dusts.
The concrete advantageous effects of the present invention is: (1) steam aspect: in formaldehyde production, steam, as raw material, often produces 1 ton and to add 250-350 kg of water steam, cause the wasting of resources, the producible water vapour pressure of formaldehyde per ton is 0.4-0.5Mpa, produces 630-660 kg of water steam.After using exhaust treatment system provided by the invention, the steam having 50% can enter in exhaust treatment system, steam does not participate in reaction in the present invention as noble gas, play and improve explosion limit, improve the effect of the safety produced, take away heat, it is ensured that stablizing of reaction temperature, and this part steam can be circulated recycling；On the other hand, due to the rising of water vapour utilization rate, decrease and produce the input quantity of methanol in formaldehyde process, improve the utilization rate of methanol；(2) flue gas aspect, achieves the utilization for flue gas by the design of exhaust treatment system, decreases fume emission; reduce environmental pollution, while protection environment, reduce energy consumption; the production making formaldehyde is more stable, and use ratio of methanol is also improved, and saves integral production cost.
Accompanying drawing explanation
Fig. 1 is the flow chart of the specific embodiment of the invention 1 exhaust treatment system；
1-tail gas boiler, 2-chimney, 3-water scrubber, 4-steam-water separator, 5-Roots blower, 6-flue gas heater, 7-smoke filter, 8-steamdrum, 9-soda pop allotter, 10-steam heater, 11-air filter.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described further, in order to those skilled in the art can be better understood by the present invention, but and is not so limited the present embodiment.
Embodiment 1
For knowing the technical characterstic that the present invention is described, below by detailed description of the invention, the present invention being illustrated, the present embodiment concrete scheme is as follows:
A kind of energy saving and environment friendly exhaust treatment system for Formaldehyde Production, including tail gas boiler 1 and blender 11, blender includes methanol gas and water steam, air, flue gas, it is connected to equipment for steam treatment between tail gas boiler 1 and blender 11, this equipment for steam treatment is made up of the steamdrum 8 being sequentially connected in series, steam distributor 9 and steam heater 10, wherein steamdrum 8 is connected with tail gas boiler 1, and steam heater 10 is connected with blender 11；The flue gas processing device in parallel with equipment for steam treatment it is additionally provided with between tail gas boiler 1 and blender 11；Flue gas processing device is made up of the water scrubber 3 being sequentially connected in series, steam-water separator 4, Roots blower 5, flue gas heater 6 and smoke filter 7, and wherein water scrubber 3 is connected with tail gas boiler 1 by chimney 2, and smoke filter 7 is connected with blender 11.
The height of the chimney 2 in the present embodiment is 12m, air-vent is had bottom chimney 2, there is autocontrol valve group at air-vent place, the height of chimney 2 is suitable corresponding mutually with the height of water scrubber 3, the design of air-vent and autocontrol valve group is conducive to regulating the flow velocity of the flue gas flowed out from chimney 2, controlling fume treatment speed, the flue-gas temperature discharged from chimney 2 is 90-110 DEG C.
The present embodiment is utilized to have following steps:
(1) first the tail gas produced in soft water and formaldehyde production is mixed in tail gas boiler 1；
(2)) mixed tail gas and soft water heat burning generation steam and flue gas in tail gas boiler 1, and steam therein sequentially passes through steamdrum 8, steam distributor 9 finally enters blender 11；Flue gas is through chimney 2, and the flue gas having volume fraction to be 30% enters air, and residue flue gas sequentially passes through water scrubber 3, steam-water separator 4, Roots blower 5, flue gas heater 6, smoke filter 7 from chimney, finally arrives blender 11；
(3) steam and flue gas after arriving blender 11 use as the feedstock circulation preparing formaldehyde.
In the present embodiment, the flue gas after being processed by smoke filter 7, temperature is 90-100 DEG C, and after flue gas enters blender 11, the volume fraction of the water vapour in blender 11 is 10%.
The design focal point of the present embodiment is: by the improvement to existing technique, and hazardous solid micronic dust and harmful ion in flue gas are removed, and in flue gas, main component is nitrogen, water vapour, also has the oxygen of 1-2%, the formaldehyde gas of 0.01-0.1%, the CO of 0.1-0.2%2Gas, the micronic dust such as dust, iron ion, it is easy to the roller of corrosion Roots blower 5, destroy lubricating system, dust enters systemic contamination catalyst, makes the consumption of raw material formaldehyde improve.
In the present embodiment, the effect of each equipment is as follows:
(1) effect of water scrubber 3: mainly wash the micronic dust in flue gas impurity off, such as iron ion, the steam having volume fraction to be 90% in flue gas is dissolved in washings, reduce the temperature of gas, in washing 3 towers it is important that control the quality of water, even distribution and reverse absorbability, flue gas is after cleaning and removing micronic dust, and flue gas is 60 DEG C in the temperature of outlet, and impurity content falls below 0.01%；
(2) steam-water separator 4: out flue gas with water removes more than 85-95% moisture and part heavy seeds with this equipment from water scrubber 3, wherein heavy seeds is the volume granule more than 80 orders, this equipment emphasis be control Roots blower 5 rotate the position of discharge outlet, technological requirement: after leaving steam-water separator 4, the moisture of flue gas is not more than 10% in wind speed and water scrubber；
(3) flue gas heater 6: adopting Combined type heating device, in technological requirement flue gas heater 6, heating-up temperature is 95-110 DEG C, and pressure is 10-40kpa, after heating, flue gas enters smoke filter 7；
(4) smoke filter 7: filter out micronic dust and moisture, in filter process, in order to improve the function of smoke filter 7, adopt tangential entrance, technological requirement: it, lower than 5%, is zero more than 80 order granule micronic dusts that technological requirement leaves the moisture of flue gas after steam-water separator.
Although the foregoing describing the specific embodiment of the present invention, it will be appreciated by those of skill in the art that these are merely illustrative of, protection scope of the present invention is to be defined by the appended claims；Those skilled in the art is under the premise without departing substantially from principles of the invention and essence, it is possible to these embodiments are made multiple conversion or amendment, but these change and amendment each falls within protection scope of the present invention.
Claims (9)
1. the energy saving and environment friendly exhaust treatment system for Formaldehyde Production, including tail gas boiler and blender, it is connected to equipment for steam treatment between tail gas boiler and blender, this equipment for steam treatment is made up of the steamdrum being sequentially connected in series, steam distributor and steam heater, wherein steamdrum is connected with tail gas boiler, and steam heater is connected with blender；It is characterized in that, between described tail gas boiler and blender, be additionally provided with the flue gas processing device in parallel with equipment for steam treatment；Described flue gas processing device is made up of the water scrubber being sequentially connected in series, steam-water separator, aerator, flue gas heater and smoke filter, and wherein water scrubber is connected with tail gas boiler by chimney, and smoke filter is connected with blender.
2. a kind of energy saving and environment friendly exhaust treatment system for Formaldehyde Production according to claim 1, it is characterised in that described aerator is Roots blower.
3. a kind of energy saving and environment friendly exhaust treatment system for Formaldehyde Production according to claim 1, it is characterised in that have air-vent, air inlet to have autocontrol valve group bottom described chimney.
4. a kind of energy saving and environment friendly exhaust treatment system for Formaldehyde Production according to claim 1, it is characterised in that described chimney height is 10-15m.
5., according to a kind of gas emitted from formaldehyde plant processing method utilizing energy saving and environment friendly exhaust treatment system described in claim 1, comprise the following steps:
(1) first the tail gas produced in soft water and formaldehyde production is mixed in tail gas boiler；
(2) mixed tail gas and output soft water heat burning generation steam and flue gas in tail gas boiler, and steam therein sequentially passes through steamdrum, steam distributor finally enters blender；Flue gas is through chimney, and the flue gas having volume fraction to be 10%-50% enters air, and residue flue gas sequentially passes through water scrubber, steam-water separator, aerator, flue gas heater, smoke filter from chimney, finally arrives blender；
(3) steam and flue gas after arriving blender use as the feedstock circulation preparing formaldehyde.
6. gas emitted from formaldehyde plant processing method according to claim 5, it is characterised in that described processed by smoke filter after flue-gas temperature be 90-100 DEG C.
7. gas emitted from formaldehyde plant processing method according to claim 5, it is characterised in that after described flue gas enters blender, in blender, the volume fraction of water vapour is 10%.
8. gas emitted from formaldehyde plant processing method according to claim 5, it is characterised in that the micronic dust in flue gas is removed by described water scrubber, and described micronic dust includes dust, iron ion.
9. gas emitted from formaldehyde plant processing method according to claim 5, it is characterised in that the water vapour that volume fraction in flue gas is 85-95% is removed by described steam-water separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610220439.4A CN105709556A (en) | 2016-04-11 | 2016-04-11 | Energy-saving and environment-friendly exhaust gas treatment system and treatment method for formaldehyde production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610220439.4A CN105709556A (en) | 2016-04-11 | 2016-04-11 | Energy-saving and environment-friendly exhaust gas treatment system and treatment method for formaldehyde production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105709556A true CN105709556A (en) | 2016-06-29 |
Family
ID=56159815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610220439.4A Pending CN105709556A (en) | 2016-04-11 | 2016-04-11 | Energy-saving and environment-friendly exhaust gas treatment system and treatment method for formaldehyde production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105709556A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109232217A (en) * | 2018-11-08 | 2019-01-18 | 山东明化新材料有限公司 | A kind of flue gas recirculation prepn. of formaldehyde and its device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006167359A (en) * | 2004-12-20 | 2006-06-29 | Sharp Corp | Harmful gas removing filter and air conditioning machine |
| CN201770629U (en) * | 2010-08-09 | 2011-03-23 | 江苏恒茂机械制造有限公司 | Device for preparing alcohol-free formaldehyde with high concentration |
| CN203307254U (en) * | 2013-06-05 | 2013-11-27 | 湖北三江化工有限责任公司 | Formaldehyde preparation system |
| CN104177239A (en) * | 2013-05-28 | 2014-12-03 | 李洪伟 | Generating type novel production technology of formaldehyde |
| CN205461630U (en) * | 2016-04-11 | 2016-08-17 | 田广袤 | A energy -concerving and environment -protective type vent gas treatment system in for formaldehyde production |
-
2016
- 2016-04-11 CN CN201610220439.4A patent/CN105709556A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006167359A (en) * | 2004-12-20 | 2006-06-29 | Sharp Corp | Harmful gas removing filter and air conditioning machine |
| CN201770629U (en) * | 2010-08-09 | 2011-03-23 | 江苏恒茂机械制造有限公司 | Device for preparing alcohol-free formaldehyde with high concentration |
| CN104177239A (en) * | 2013-05-28 | 2014-12-03 | 李洪伟 | Generating type novel production technology of formaldehyde |
| CN203307254U (en) * | 2013-06-05 | 2013-11-27 | 湖北三江化工有限责任公司 | Formaldehyde preparation system |
| CN205461630U (en) * | 2016-04-11 | 2016-08-17 | 田广袤 | A energy -concerving and environment -protective type vent gas treatment system in for formaldehyde production |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109232217A (en) * | 2018-11-08 | 2019-01-18 | 山东明化新材料有限公司 | A kind of flue gas recirculation prepn. of formaldehyde and its device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104209107B (en) | A kind of high-efficiency desulfurization activated coke Analytic Tower and analytic method | |
| CN109794146B (en) | Grate-rotary kiln SNCR/SCR denitration and active coke desulfurization combined system and process | |
| CN101565263B (en) | Sludge superheated vapor drying system of two-stage paddle dryer and drying process thereof | |
| CN102954678B (en) | Utilize method and the device thereof of biomass boiler flue gas drying biomass material | |
| CN104792186A (en) | Sintering flue gas energy-saving type denitrification system | |
| CN105651069A (en) | Energy-saving environment-friendly efficient drying system | |
| CN103623690A (en) | Control method for wet process flue gas desulfurization system of thermal power station | |
| CN103405988B (en) | Flue-gas-cooling system and method | |
| CN105709556A (en) | Energy-saving and environment-friendly exhaust gas treatment system and treatment method for formaldehyde production | |
| CN102161484A (en) | Zero-coal-consumption activated carbon production process and production device used in same | |
| CN111895727A (en) | Double-heat-source built-in hot low-rank lump coal drying furnace | |
| CN110030566B (en) | Comprehensive treatment method for waste gas and waste water | |
| CN201530772U (en) | System utilizing double-stage paddle dryers and drying sludge with superheated steam | |
| CN203400616U (en) | Flue gas cooling system | |
| CN206607139U (en) | Sludge drying and CIU | |
| CN104163556B (en) | Printing and dyeing mill's sizing waste gas is utilized to mix system and the method thereof of Heat Treatment printing and dyeing sludge with boiler smoke | |
| CN205461630U (en) | A energy -concerving and environment -protective type vent gas treatment system in for formaldehyde production | |
| CN106552488A (en) | A kind of coking production process flue gas energy-conserving and environment-protective process integrated system and its method | |
| CN204555719U (en) | The energy-saving denitrating system of a kind of sinter fume | |
| CN107131492A (en) | A kind of boiler plant of producing steam | |
| CN103121786B (en) | Integrated condensation dehydration and waste heat utilization sludge treatment device and technological process | |
| CN203715438U (en) | Desulfurization wastewater treatment device for power plant | |
| CN105276803A (en) | Efficient heat energy utilization structure of ceramic hot-blast stove | |
| CN207351232U (en) | A kind of coking flue gas purification system | |
| CN104147884B (en) | The hot flue gas treating process of a kind of fine cleaned coal drying system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160629 |
|
| RJ01 | Rejection of invention patent application after publication |