CN101486633B - Formaldehyde absorbing tower - Google Patents
Formaldehyde absorbing tower Download PDFInfo
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- CN101486633B CN101486633B CN2009100141456A CN200910014145A CN101486633B CN 101486633 B CN101486633 B CN 101486633B CN 2009100141456 A CN2009100141456 A CN 2009100141456A CN 200910014145 A CN200910014145 A CN 200910014145A CN 101486633 B CN101486633 B CN 101486633B
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- water tank
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Abstract
The invention relates to a formaldehyde absorption tower which simplifies the process of converting hot formaldehyde gas into formaldehyde finished products. The formaldehyde absorption tower consists of a water tank packed column, the lower part of which is provided with a hot formaldehyde gas inlet; the inside wall of the hollow cavity of the water tank packed column over the hot formaldehyde gas inlet is provided with a layer of lower grid plate and a filler is put on the lower grid plate in the hollow cavity of the water tank packed column; the filler over the lower grid plate is provided with a soft water tank; the soft water tank is positioned on the inside wall of the hollow cavity of the water tank packed column and the inside wall of the hollow cavity of the water tank packed column below the lower grid plate is provided with a cooling water tank; the inside wall of the hollow cavity of the water tank packed column over the lower grid plate is provided with a layer of upper grid plate and a filler is put on the upper grid plate in the hollow cavity of the water tank packed column; the filler on the upper grid plate is provided with a soft water tank, the soft water tank is positioned on the inside wall of the hollow cavity of the water tank packed column, the soft water tank over the upper grid plate and the soft water tank over the lower grid plate are communicated; and the cooling water tank and the soft water tanks are made of aluminum.
Description
Technical field
The present invention relates to formaldehyde, relate in particular to a kind of formaldehyde absorbing tower.
Background technology
Formaldehyde Production is to be raw material with methyl alcohol, in vaporizer, evaporates gasification through methyl alcohol, feeds water vapour again and air becomes ternary gas, gets into the formolite reaction device, does under the condition of catalyzer at silver (or iron molybdenum), is oxidized to formaldehyde.The purpose that feeds water vapour is that methyl alcohol is reacted with oxygen beyond its limits of explosion, with the security that guarantees to produce.
One, the proposition of problem:
The conventional formaldehyde Production Flow Chart is the hot formaldehyde gas that the silver catalyst layer; Behind Quench cooling and recovery part heat; Also have temperature to get in the formaldehyde absorbing tower (also have minority with vertical sieve plate column etc.) at 80-100 ℃ the hot formaldehyde gas inlet of hot formaldehyde gas from the formaldehyde absorbing tower bottom; Utilize a spot of water, spray circulation from the top of formaldehyde absorbing tower downwards and be absorbed as formalin, remaining hot formaldehyde gas is that tail gas goes out tower from cat head; Heat moved outside not when formaldehyde changed formalin into by hot formaldehyde gas in formaldehyde absorbing tower.60-70 ℃ formalin is discharged in the formaldehyde absorbing tower bottom, gets into the board-like formaldehyde water cooler that stainless steel is made, and water cools; Formalin after the cooling; Part is returned the formaldehyde absorbing tower internal recycle and is absorbed, and reaches the finished product concentration requirement, and extraction is the formaldehyde finished product.
There is following drawback in this absorption cooling process in production practice:
(1) wholely change the absorption process of formalin into by hot formaldehyde gas, promptly in formaldehyde absorbing tower from cat head to tower at the bottom of, the absorption liquid temperature raises gradually, and does not have heat to move outward.So it is not high to absorb impellent, the tail gas control that goes out tower from cat head is bad, and the residual amount of formaldehyde is exceeded standard, the one, influence environment, and the 2nd, influence benefit.
The formalin of (2) discharging from the formaldehyde absorbing tower bottom, heat is not recycled, but with a large amount of water quench, increases the load of water coolant water cooling tower.Particularly at summer and plate cooler during because of the recirculated water fouling; Formalin cooling difficulty in the plate cooler; And the high formalin of portion temperature in the plate cooler returns the absorption of formaldehyde absorbing tower internal recycle, just more cannot say for sure to demonstrate,prove assimilation effect, causes vicious cycle.
(3) formaldehyde absorbing tower and plate cooler are all made with stainless steel, cost an arm and a leg.
(4) plate-type heat exchanger uses recirculated cooling water very easily to deposit mud, fouling etc., deals with suitable trouble, has a strong impact on normally carrying out of production, and the cleaning one by one of must stopping consumes great amount of manpower and expense.
Summary of the invention
The purpose of this invention is to provide a kind of formaldehyde absorbing tower that changes formaldehyde finished product flow process by hot formaldehyde gas into of having simplified.
To achieve these goals; The technical scheme that the present invention takes is: a kind of formaldehyde absorbing tower; Comprising the water tank packing tower, water tank packing tower bottom has hot formaldehyde gas inlet, and its characteristics are: on the water tank packing tower cavity inner side-wall of hot formaldehyde gas inlet top one deck lower grid plate is installed; Be placed with filler on the lower grid plate in the water tank packing tower cavity; In the filler of lower grid plate top softened water tank is installed, softened water tank is installed on the water tank packing tower cavity inner side-wall, on the water tank packing tower cavity inner side-wall of lower grid plate below cooling water tank is installed.
On the water tank packing tower cavity inner side-wall of said lower grid plate top one deck top grating is installed; Be placed with filler on the top grating in the water tank packing tower cavity; In the filler of top grating top softened water tank is installed; This softened water tank is installed on the water tank packing tower cavity inner side-wall, and the softened water tank of top grating top communicates with the softened water tank of said lower grid plate top.
Said cooling water tank and softened water tank material are aluminium.
Advantageous effect of the present invention is: lower grid plate, top grating among the present invention are used for carrying the top filler weight.The present invention in use; Below hot formaldehyde gas inlet is at the bottom of hot formalin accumulates in tower, in hot formalin, cooling water tank to be installed, and tower is equipped with liquidometer indication methylene oxide aqueous solution liquid level outward; Cooled formalin is discharged at the bottom of tower, gets into next circulation and absorbs operation.
Go out the hot formaldehyde gas of formolite reaction device, in self-heating formaldehyde gas inlet entering the present invention, rise through gas distribution, pass through packing layer and softened water tank successively, the formaldehyde tail gas after being absorbed is discharged outside the tower after mist separates, and gets into the tail gas boiler and does the fuel use.
According to the recovering condition of tower temperature distribution and heat, go up most and feed cold soft water (can use refrigerated water summer) in one group of softened water tank, because temperature is low; As checking on of exhaust gas temperature, again preheating soft water, this softened water tank soft water preheating of coming out gets into the softened water tank of below certainly; The present invention in use; The sensible heat that absorbs heat, hot formaldehyde gas of the present invention is absorbed cooling, and soft water is heated and sends into the oiler feed of boiler as heat simultaneously, with voluminous steam, energy-saving and cost-reducing.Next group is inserted at the bottom of the tower cooling water tank in the formalin and is fed recirculated cooling water and check on as the last cooling that goes out the tower formalin, and to guarantee favorable cooling effect, recirculated cooling water goes out tower and sends into the cold water system, recycles after the cooling.
The present invention thoroughly changes the drawback of former tower, and has reclaimed heat energy, and following advantage is arranged:
(1) the present invention combines the cooling of tower and energy recovery, has reached the purpose that good cooling results, heat energy are able to reclaim, reduce the cold water expense.
(2) unite two into one ortho-formaldehyde absorption tower and plate cooler, simplified flow process, reduced facility investment, use the splendid aluminum pipe of heat-transfer effect as the heat exchange material, its heat-transfer effect is tens times of steel.Water tank has occupied the volume of Stainless Steel Helices in tower, also saved the investment of expensive stainless steel filler, has broken the convention that formaldehyde plant can only be used stainless material.
(3) thermograde rationally in the tower of the present invention, the absorption impellent is big, assimilated efficiency is high; With the distribution of differing temps with different cooling measures; Heat is shifted out in generation with absorbing heat at any time, and having broken formaldehyde absorbing tower all is the adiabatic history that absorbs, and is the breakthrough innovation that formaldehyde absorbs theory.
(4) thoroughly solving plate cooler uses recirculated water to be prone to stop up, uses primary water to be prone to the difficult problem of fouling; Stopped to have guaranteed the long-term operation of producing because of the long-time situation of stopping and handling of cleaning plate cooler, the last two groups of softened water tanks of the design feed soft water does not have blocking problem; Next group cooling water tank is a circulating water cooling; If there is fouling not stop at any time, can under the ordinary production situation, open the water coolant case lid, separately cleaning.Tank lid among the present invention is that flange connects, and clears up separately for each joint and designs, and is easy to maintenance.
(5) aluminum radiator long service life can be used more than 10 years, and ten thousand yuan of the price 5-6 of a platen formula water cooler, and the aluminum radiator price has only about 20,000 yuan, and the aluminium cooling performance is than excellent many of stainless steel.The former full charge resistance of whole tower resistance ratios is little, and turndown ratio is big, and mass transfer, heat-transfer effect are good.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is done and to further describe:
A kind of formaldehyde absorbing tower, as shown in Figure 1, comprising the water tank packing tower; Water tank packing tower bottom has hot formaldehyde gas inlet; On the water tank packing tower cavity inner side-wall of hot formaldehyde gas inlet top one deck lower grid plate is installed, is placed with filler on the lower grid plate in the water tank packing tower cavity, in the filler of lower grid plate top softened water tank is installed; Softened water tank is installed on the water tank packing tower cavity inner side-wall, on the water tank packing tower cavity inner side-wall of lower grid plate below cooling water tank is installed; In the present embodiment; On the water tank packing tower cavity inner side-wall of lower grid plate top one deck top grating is installed; Be placed with filler on the top grating in the water tank packing tower cavity; In the filler of top grating top softened water tank is installed, this softened water tank is installed on the water tank packing tower cavity inner side-wall, and the softened water tank of top grating top communicates with the softened water tank of lower grid plate top; In the present embodiment, cooling water tank and softened water tank material are aluminium.
Claims (3)
1. formaldehyde absorbing tower; Comprising water tank packing tower (1); Water tank packing tower (1) bottom has hot formaldehyde gas inlet (5); It is characterized in that: on water tank packing tower (1) the cavity inner side-wall of hot formaldehyde gas inlet (5) top one deck lower grid plate (4) is installed, is placed with filler on the lower grid plate (4) in water tank packing tower (1) cavity, in the filler of lower grid plate (4) top softened water tank (2) is installed; Softened water tank (2) is installed on water tank packing tower (1) the cavity inner side-wall, on water tank packing tower (1) the cavity inner side-wall of lower grid plate (4) below cooling water tank (6) is installed.
2. formaldehyde absorbing tower according to claim 1; It is characterized in that: on water tank packing tower (1) the cavity inner side-wall of said lower grid plate (4) top one deck top grating (3) is installed; Be placed with filler on the top grating (3) in water tank packing tower (1) cavity; In the filler of top grating (3) top softened water tank (2) is installed, this softened water tank (2) is installed on water tank packing tower (1) the cavity inner side-wall, and the softened water tank (2) of top grating (3) top communicates with the softened water tank (2) of said lower grid plate (4) top.
3. formaldehyde absorbing tower according to claim 2 is characterized in that: said cooling water tank (6) is an aluminium with softened water tank (2) material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100141456A CN101486633B (en) | 2009-02-11 | 2009-02-11 | Formaldehyde absorbing tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100141456A CN101486633B (en) | 2009-02-11 | 2009-02-11 | Formaldehyde absorbing tower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101486633A CN101486633A (en) | 2009-07-22 |
| CN101486633B true CN101486633B (en) | 2012-04-18 |
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ID=40889718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100141456A Expired - Fee Related CN101486633B (en) | 2009-02-11 | 2009-02-11 | Formaldehyde absorbing tower |
Country Status (1)
| Country | Link |
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| CN (1) | CN101486633B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108421367B (en) * | 2018-03-23 | 2020-12-22 | 浙江昌新生物纤维股份有限公司 | Intelligent formaldehyde collecting and processing equipment based on Internet of things |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2116523U (en) * | 1992-02-24 | 1992-09-23 | 华南理工大学 | Absorption condensation tower for manufacturing formaldehyde |
| CN1326918A (en) * | 2001-07-11 | 2001-12-19 | 马辰生 | Producing equipment for formaldehyde and its completed production process |
| CN101024603A (en) * | 2007-03-29 | 2007-08-29 | 永港伟方(北京)科技有限公司 | Methanal absorbing system |
| CN101070275A (en) * | 2007-03-29 | 2007-11-14 | 永港伟方(北京)科技有限公司 | Formaldehyde absorbing method and system |
| CN201033767Y (en) * | 2007-03-29 | 2008-03-12 | 永港伟方(北京)科技有限公司 | Formaldehyde absorption auxiliary tower |
| CN201062240Y (en) * | 2007-03-29 | 2008-05-21 | 永港伟方(北京)科技有限公司 | Formaldehyde absorption main tower |
| CN201351146Y (en) * | 2009-02-11 | 2009-11-25 | 王承信 | Absorption tower for formaldehyde |
-
2009
- 2009-02-11 CN CN2009100141456A patent/CN101486633B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2116523U (en) * | 1992-02-24 | 1992-09-23 | 华南理工大学 | Absorption condensation tower for manufacturing formaldehyde |
| CN1326918A (en) * | 2001-07-11 | 2001-12-19 | 马辰生 | Producing equipment for formaldehyde and its completed production process |
| CN101024603A (en) * | 2007-03-29 | 2007-08-29 | 永港伟方(北京)科技有限公司 | Methanal absorbing system |
| CN101070275A (en) * | 2007-03-29 | 2007-11-14 | 永港伟方(北京)科技有限公司 | Formaldehyde absorbing method and system |
| CN201033767Y (en) * | 2007-03-29 | 2008-03-12 | 永港伟方(北京)科技有限公司 | Formaldehyde absorption auxiliary tower |
| CN201062240Y (en) * | 2007-03-29 | 2008-05-21 | 永港伟方(北京)科技有限公司 | Formaldehyde absorption main tower |
| CN201351146Y (en) * | 2009-02-11 | 2009-11-25 | 王承信 | Absorption tower for formaldehyde |
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| Publication number | Publication date |
|---|---|
| CN101486633A (en) | 2009-07-22 |
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Owner name: NANTONG HUAXIN MASS TRANSFER EQUIPMENT TECHNOLOGY Free format text: FORMER OWNER: WANG CHENGXIN Effective date: 20141020 |
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Free format text: CORRECT: ADDRESS; FROM: 277100 ZAOZHUANG, SHANDONG PROVINCE TO: 226300 NANTONG, JIANGSU PROVINCE |
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Effective date of registration: 20141020 Address after: 226300 lion bridge village, Jinsha Town, Nantong, Tongzhou District, Jiangsu Patentee after: Nantong Huaxin Mass Transfer Equipment Technology Co.,Ltd. Address before: 277100 Puli Chemical Co., Ltd., 18 Qingquan Road, Shizhong District, Shandong, Zaozhuang Patentee before: Wang Chengxin |
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| CF01 | Termination of patent right due to non-payment of annual fee |