CN101759534A - Formaldehyde prepration process and device - Google Patents
Formaldehyde prepration process and device Download PDFInfo
- Publication number
- CN101759534A CN101759534A CN201010120578A CN201010120578A CN101759534A CN 101759534 A CN101759534 A CN 101759534A CN 201010120578 A CN201010120578 A CN 201010120578A CN 201010120578 A CN201010120578 A CN 201010120578A CN 101759534 A CN101759534 A CN 101759534A
- Authority
- CN
- China
- Prior art keywords
- gas
- formaldehyde
- tower
- methanol
- liquid
- 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
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention relates to the production field of formaldehyde, in particular to a formaldehyde prepration process which simplifies the process flow and a device, and the process flow is as follows: heating methanol and air, then removing fog droplets, adding saturated water vapor, and then arresting fire and filtering; then introducing a catalyst for carrying out oxidation and deoxidation; quenching generated gas; absorbing the formaldehyde gas through process water, extracting, carrying out aldehyde-alcohol separation, collecting and storing the aldehyde after separation as a formaldehyde finished product, and continuously treating other gas. The device comprises a processor, a reactor and a combined absorption tower, and methanol mixed gas sequentially passes through the components, wherein a circulating pump is connected on the combined absorption tower, a distillation absorption tower comprises a tower bottom section for absorbing the gas and re-distributing, a distillation conversion section for carrying out methanol separation gas-liquid conversion, an absorption section for liquid level control, a floating valve section for absorbing the methanol gas and a tower top section for gas-liquid separation. The preparation process and the device have the advantages of low conversion, long drive cycle, small system resistance, low power consumption and energy consumption and low material consumption.
Description
Technical field
The present invention relates to production field of formaldehyde, especially a kind of formaldehyde prepration process and device of simplifying technical process.
Background technology
At present, the China silver method Formaldehyde Production was through more than 50 years courses of trials and hardship, all obtained great achievement in every respect, energy consumption is the air feed type outside consumption gas type changes into, material consumption is from 500kg methyl alcohol/T 37% formaldehyde 445kg methyl alcohol/T 37% formaldehyde till now, production capacity develops into more than 2,000 ten thousand tons of today from the hundreds of thousands of ton, and silver-colored method production production capacity and technology have been in rank first.Formaldehyde Production develops into the production that becomes more meticulous by extensive style, and to the road of career development, research is exactly to improve turnover ratio in technology and operation by simply.Present many factories manage in Formaldehyde Production, and formaldehyde process optimization, catalyst are selected for use and installed all and do well, but the material consumption level can only remain on about 445kg.
Domestic Formaldehyde Production mainly adopts two kinds of operational paths, traditional technology and tail gas circulation method technology, traditional technology is to produce formaldehyde with the ternary gas oxidizing reaction, tail gas circulation method technology is to adopt the reaction of quaternary gas cyaniding to produce formaldehyde, the reaction absorption mechanism is basic identical, just the configuration of reaction member equipment configuration is different, tail gas circulation method technology increases exhaust system, remove reaction heat with tail gas instead of part batching water vapor, can accomplish 50% left and right sides concentration formaldehyde products, and two kinds of preparation method's pursuits all is to improve the transformation efficiency selectivity, all be as systems engineering Formaldehyde Production, make every effort to equipment, electric, instrument, starting material, operation and each unit of personnel, link is accomplished meticulous, reaches high conversion.Above way can not reduce negative reaction simultaneously and guarantee not reduce productive rate at the raising transformation efficiency.
Summary of the invention
The technical problem to be solved in the present invention is: shortcoming and deficiency in order to solve above-mentioned existence provide a kind of formaldehyde prepration process and device of simplifying technical process.
The technical solution adopted for the present invention to solve the technical problems is: a kind of formaldehyde prepration process and device, its technological process is as follows
(1) methyl alcohol and air mixed and heat are removed the mixture of heating and to be added saturated vapor behind the droplet and form the three-element mixed gas body, then it are carried out back-fire relief and filter;
(2) the three-element mixed gas body carries out oxidization of methanol and deoxygenation after feeding catalyzer under 590 ℃～610 ℃ high temperature, generates formaldehyde gas;
(3) formaldehyde gas and other gas after the generation carries out quenching, prevents to carry out thermolysis;
(4) formaldehyde gas absorbs by process water, aldehyde is carried out in extraction, alcohol separates, and the aldehyde after the separation is as the folding and unfolding of formaldehyde finished product, and a part is carried out the self-circulation absorption in the rare aldehyde liquid after the absorption, another part replenishes the absorption liquid that once absorbs, the unabsorbed processing.
Further, for the better effects if of technology that makes preparation, methyl alcohol and air and/or water vapor are to be that 0.38～0.43 ratio is mixed according to the pure mol ratio of oxygen.
The device for preparing above-mentioned technology, has the ternary gas disposal device that methanol mixed gas passes through successively, reactor and combined absorbing tower, be connected with recycle pump on the combined absorbing tower, ternary gas disposal device comprises the methanol evaporator that is arranged on the bottom, be arranged on the dauber that removes of methanol evaporator upper end, be arranged on the overheated assembly and the fire-retardant filter that remove the dauber upper end, combined absorbing tower is the distillation absorption tower, and the distillation absorption tower comprises from bottom to top and absorbs section at the bottom of the tower that gas distributes again, the distillation transformation segment that methyl alcohol separates and gas-liquid is changed, the absorber portion of liquid level control, float valve section and the isolating tower top section of gas-liquid that the methyl alcohol aspiration is received.
In order to prolong the filter material life cycle, good filtration effect, described back-fire relief filters gas bag and draws together heating component, spark arrester and combined strainer.
The invention has the beneficial effects as follows that formaldehyde prepration process of the present invention and device are changed low; The driving cycle is long, and systemic resistance is little, and power consumption, energy consumption are low, and the catalyst life cycle is long; Formaldehyde Production, oxygen temperature control are low, and negative reaction is few, the system interference factor are required low, have reduced operation easier; Formaldehyde products contains pure amount and can reach no pure requirement, the quality height of formaldehyde products through distillation process in the product; Stop frequency is few, and the methyl alcohol of consumption is few, guarantees that material consumption is low; Do not increase tail gas and can produce high concentrated formaldehyde yet, make CO content 0.3% in the tail gas, CO
2Content 2.0%, pure content does not have in the formaldehyde, formic acid content≤0.01, unit consumption 435kg/T.It is short to possess technical process simultaneously, and equipment is few, and floor space is little, the characteristics of less investment.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention.
Among the figure 1, ternary gas disposal device, 2, reactor, 3, combined absorbing tower, 31, section at the bottom of the tower, 32, the distillation transformation segment, 33, absorber portion, 34, the float valve section, 35, tower top section, 4, recycle pump.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the synoptic diagram of simplification, basic structure of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
The formaldehyde prepration process process is as follows
(1) methyl alcohol and air mixed and heat are removed the mixture of heating and to be added saturated vapor behind the droplet and form the three-element mixed gas body, then it are carried out back-fire relief and filter;
(2) the three-element mixed gas body carries out oxidization of methanol and deoxygenation after feeding catalyzer under 590 ℃～610 ℃ high temperature, generates formaldehyde gas;
(3) formaldehyde gas and other gas after the generation carries out quenching, prevents to carry out thermolysis;
(4) formaldehyde gas absorbs by process water, aldehyde is carried out in extraction, alcohol separates, and the aldehyde after the separation is as the folding and unfolding of formaldehyde finished product, and a part is carried out the self-circulation absorption in the rare aldehyde liquid after the absorption, another part replenishes the absorption liquid that once absorbs, the unabsorbed processing.
Methyl alcohol and air and/or water vapor are to be that 0.38～0.43 ratio is mixed according to oxygen alcohol mol ratio.
The device for preparing above-mentioned technology as shown in Figure 1, has the ternary gas disposal device 1 that methanol mixed gas passes through successively, reactor 2 and combined absorbing tower 3, be connected with recycle pump 4 on the combined absorbing tower 3, it is characterized in that: ternary gas disposal device 1 comprises the methanol evaporator that is arranged on the bottom, be arranged on the dauber that removes of methanol evaporator upper end, be arranged on the overheated assembly and the fire-retardant filter that remove the dauber upper end, combined absorbing tower 3 is the distillation absorption tower, the distillation absorption tower comprises from bottom to top and absorbs section 31 at the bottom of the tower that gas distributes again, the distillation transformation segment 32 that methyl alcohol separates and gas-liquid is changed, the absorber portion 33 of liquid level control, float valve section 34 and the isolating tower top section 35 of gas-liquid that the methyl alcohol aspiration is received, back-fire relief filters gas bag and draws together heating component, spark arrester and combined strainer.Prolonged the life cycle of filter material, good filtration effect makes easy for installation.On transformation segment 33 sparger is set, makes circulation big, resistance is little, is evenly distributed.
Methyl alcohol of the present invention is squeezed into by methanol pump from the methyl alcohol scale tank and is entered the treater bottom, the methanol evaporator that enters in the treater is preceding by the variable valve dominant discharge, enter a certain amount of air that brings by gas blower from base of evaporator simultaneously, binary mixture to methyl alcohol in the vaporizer and air heats, then binary mixture adds a certain amount of saturated vapor after removing droplet from the top, be made into methyl alcohol with finite concentration proportioning, the three-element mixed gas body of air and water vapor, the three-element mixed gas body enters overheated assembly, heat by steam, to 110 ℃ after fire-retardant filter enter in the reactor 2 that catalyzer is housed after filtering, under 610 ℃ of high temperature, carry out methanol oxidation and deoxygenation by touching the coal seam from top to bottom, generation has the gas of formaldehyde, the gas that generates gathers cold by extremely cold section of reactor 2 rapidly, then it being sent into the absorption tower absorbs, the finished product that will contain formaldehyde enters that the dealcoholysis device carries out can aldehyde, alcohol separates, alcohol is stayed and is entered the treater use in the system after treatment, aldehyde is that finished product enters the formaldehyde test tank, no absorption gas enters his top of absorption and absorbs, the rare aldehyde liquid that absorbs is got with pump, part self-circulation in tower absorbs, a part enters the bottom, absorption tower and is used for replenishing absorption liquid, the unabsorbed tail gas in top, absorption tower is sent in the treater and is burnt, liberated heat produces steam indirectly, but the steam plenum system uses outward.
With above-mentioned foundation desirable embodiment of the present invention is enlightenment, and by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.The technical scope of this invention is not limited to the content on the specification sheets, must determine its technical scope according to the claim scope.
Claims (4)
1. formaldehyde prepration process, it is characterized in that: preparation technology is as follows
(1) methyl alcohol and air mixed and heat are removed the mixture of heating and to be added saturated vapor behind the droplet and form the three-element mixed gas body, then it are carried out back-fire relief and filter;
(2) the three-element mixed gas body carries out oxidization of methanol and deoxygenation after feeding catalyzer under 590 ℃～610 ℃ high temperature, generates formaldehyde gas;
(3) formaldehyde gas and other gas after the generation carries out quenching, prevents to carry out thermolysis;
(4) formaldehyde gas absorbs by process water, aldehyde is carried out in extraction, alcohol separates, and the aldehyde after the separation is as the folding and unfolding of formaldehyde finished product, and a part is carried out the self-circulation absorption in the rare aldehyde liquid after the absorption, another part replenishes the absorption liquid that once absorbs, the unabsorbed processing.
2. formaldehyde prepration process according to claim 1 is characterized in that: described methyl alcohol and air and/or water vapor are to be that 0.38～0.43 ratio is mixed according to oxygen alcohol mol ratio.
3. device for preparing claim 1 technology, has the ternary gas disposal device (1) that methanol mixed gas passes through successively, reactor (2) and combined absorbing tower (3), be connected with recycle pump (4) on the combined absorbing tower (3), it is characterized in that: ternary gas disposal device (1) comprises the methanol evaporator that is arranged on the bottom, be arranged on the dauber that removes of methanol evaporator upper end, be arranged on the overheated assembly and the fire-retardant filter that remove the dauber upper end, combined absorbing tower (3) is the distillation absorption tower, and the distillation absorption tower comprises from bottom to top and absorbs section (31) at the bottom of the tower that gas distributes again, the distillation transformation segment (32) that methyl alcohol separates and gas-liquid is changed, the absorber portion (33) of liquid level control, float valve section (34) and the isolating tower top section of gas-liquid (35) that the methyl alcohol aspiration is received.
4. methyl alcohol preparation facilities according to claim 3 is characterized in that: described back-fire relief filters gas bag and draws together heating component, spark arrester and combined strainer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010120578A CN101759534A (en) | 2010-02-04 | 2010-02-04 | Formaldehyde prepration process and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010120578A CN101759534A (en) | 2010-02-04 | 2010-02-04 | Formaldehyde prepration process and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101759534A true CN101759534A (en) | 2010-06-30 |
Family
ID=42490939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010120578A Pending CN101759534A (en) | 2010-02-04 | 2010-02-04 | Formaldehyde prepration process and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101759534A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104147800A (en) * | 2014-08-27 | 2014-11-19 | 江苏凯茂石化科技有限公司 | Two-stage methanol evaporation column and methanol evaporation technology method |
| CN105732342A (en) * | 2016-03-25 | 2016-07-06 | 湖北三江化工有限责任公司 | Formaldehyde production method based on exhaust gas circulating process |
| CN112457177A (en) * | 2020-11-09 | 2021-03-09 | 潍坊惠丰化工有限公司 | Formaldehyde production energy-saving device and production process |
| CN112479845A (en) * | 2020-11-09 | 2021-03-12 | 潍坊惠丰化工有限公司 | High-concentration formaldehyde production device and production process |
-
2010
- 2010-02-04 CN CN201010120578A patent/CN101759534A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104147800A (en) * | 2014-08-27 | 2014-11-19 | 江苏凯茂石化科技有限公司 | Two-stage methanol evaporation column and methanol evaporation technology method |
| CN105732342A (en) * | 2016-03-25 | 2016-07-06 | 湖北三江化工有限责任公司 | Formaldehyde production method based on exhaust gas circulating process |
| CN112457177A (en) * | 2020-11-09 | 2021-03-09 | 潍坊惠丰化工有限公司 | Formaldehyde production energy-saving device and production process |
| CN112479845A (en) * | 2020-11-09 | 2021-03-12 | 潍坊惠丰化工有限公司 | High-concentration formaldehyde production device and production process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101439256B (en) | Film method for recycling CO in high-pressure exhaust from production of acetic acid by carbonylation | |
| CN102321059B (en) | Production process and production device of phthalic anhydride | |
| CN103708426B (en) | Anthraquinone oxydol production apparatus | |
| CN103920384A (en) | Equipment for absorbing high-concentration nitric oxides by adopting normal-pressure process | |
| CN101759534A (en) | Formaldehyde prepration process and device | |
| CN105060456A (en) | Sewage wet catalytic oxidation treatment apparatus and method thereof | |
| CN101508633A (en) | Process and apparatus for preparing methanal with low transformational cycle method | |
| CN103343055A (en) | Method for quality improvement of biological oil through catalytic esterification-deoxidize reforming in subcritical alcohol system | |
| CN102583593B (en) | A kind of method and apparatus processing high concentrated organic wastewater production methane gas | |
| CN203754482U (en) | Wet oxidation treatment device of wastewater | |
| CN202465273U (en) | Process system for preparing sulfuric acid from hydrogen sulfide through wet method | |
| CN203699908U (en) | Anthraquinone process hydrogen peroxide production device | |
| CN105218334A (en) | A kind of prepn. of formaldehyde | |
| CN201713454U (en) | Formaldehyde preparation device | |
| CN105085338A (en) | Production method and apparatus of dimethyl disulfide | |
| CN202246481U (en) | Formaldehyde production device with low conversion rate and high yield | |
| CN104911033A (en) | Preparation device for biodiesel and method for preparing biodiesel by utilization of preparation device | |
| CN201406390Y (en) | Dealcoholized high-concentration formaldehyde production equipment | |
| CN201372255Y (en) | Formaldehyde preparation device | |
| CN103214439B (en) | A kind of method of separating-purifying furfural | |
| CN201770629U (en) | Device for preparing alcohol-free formaldehyde with high concentration | |
| CN102381949B (en) | Low-conversion-rate high-yield formaldehyde production technology and device thereof | |
| CN101550073B (en) | Equipment for producing high concentration dealcoholization formaldehyde and production technology thereof | |
| CN203938621U (en) | A kind of by the refining isobutyric suite of equipment of isobutyric aldehyde | |
| CN201495187U (en) | Methanol removing system of formaldehyde adsorption tower |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100630 |