CN102295542A - Integrated utilization method of heat in formaldehyde production process - Google Patents
Integrated utilization method of heat in formaldehyde production process Download PDFInfo
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- CN102295542A CN102295542A CN2011101837221A CN201110183722A CN102295542A CN 102295542 A CN102295542 A CN 102295542A CN 2011101837221 A CN2011101837221 A CN 2011101837221A CN 201110183722 A CN201110183722 A CN 201110183722A CN 102295542 A CN102295542 A CN 102295542A
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Abstract
An integrated utilization method of heat in a formaldehyde production process. The method comprises operations of methanol evaporation, high temperature oxidation and dehydrogenation and absorption of formaldehyde gas by water into a formaldehyde solution. In the methanol evaporation operation, methanol and water in a weight ratio of 1000:45-50 are let in an evaporator, and evaporated with air inletting at an evaporation temperature of 60-70 DEG C. In the operation of absorption of formaldehyde gas by water into the formaldehyde solution, a temperature of the formaldehyde solution at an absorbing tower bottom is controlled at 75-85 DEG C. A heat exchanger is connected to the evaporator bottom and the absorbing tower bottom; during the formaldehyde production process, a mixture of methanol and water in the evaporator are input into the heat exchanger to carry out heat exchange with the formaldehyde solution input simultaneously. The method of the invention can save heat energy in the formaldehyde production process and reduce formaldehyde production costs.
Description
Technical field
The present invention relates to the Formaldehyde Production technical field, be specifically related to the heat integration method in a kind of formaldehyde production.
Background technology
In the Formaldehyde Production traditional technology, normally in vaporizer, evaporate by methyl alcohol, then enter in the reactor under the catalyst for electrolytic silver effect through high temperature oxidation and dehydrogenation reaction and generate formaldehyde gas, formaldehyde gas forms formaldehyde solution by the water absorption in the absorption tower then, comprises that promptly methyl alcohol evaporation, high temperature oxidation and dehydrogenation, formaldehyde gas absorb into the formaldehyde solution operation by water.In the methyl alcohol evaporative process, in the feeding vaporizer is methyl alcohol, and the heat that the evaporation of methyl alcohol relies on the well heater in the vaporizer to give carries out under the condition of bubbling air, and vaporization temperature is controlled at about 44～48 ℃.In methyl alcohol high temperature oxidation and certain embodiments, oxidizing reaction is thermopositive reaction, and dehydrogenation reaction is thermo-negative reaction, and production process totally is thermopositive reaction, and suitable heat can utilize.Heat is utilized in the big quantitative response that present domestic most of Formaldehyde Production producer all produces reaction process, but hang down below 100 ℃ because the hot formaldehyde gas that has reacted can not also fairly drop to, therefore the hot formaldehyde gas that comes out from reactor in the absorption tower after water absorbs into formaldehyde solution, the formaldehyde solution temperature is still higher at the bottom of being in the absorption tower, this part heat energy not only is not fully utilized at present, but also will design formaldehyde solution is cooled to certain temperature with a large amount of water coolants, cause the waste of heat energy, strengthened the production cost of formaldehyde.
Summary of the invention
Technical problem solved by the invention provides the heat integration method in a kind of formaldehyde production, uses this method the heat energy of bottom, absorption tower formaldehyde solution is fully used, and saves the heat energy in the formaldehyde production, reduces the Formaldehyde Production cost.
The technical solution adopted in the present invention is: the heat integration method in a kind of formaldehyde production, methyl alcohol evaporation, high temperature oxidation and the dehydrogenation, the formaldehyde gas that comprise Formaldehyde Production absorb into the formaldehyde solution operation by water, it is characterized in that, in the methyl alcohol evaporization process, in vaporizer, feed the first alcohol and water, the weight part proportioning of the first alcohol and water that feeds is 1000 ﹕ 45～50, and evaporates under the condition of bubbling air, and vaporization temperature is controlled at 60～70 ℃; Described formaldehyde gas absorbs in the formaldehyde solution operation by water, and the temperature of the formaldehyde solution of bottom, absorption tower is controlled at 75～85 ℃; The bottom of described vaporizer is connected with interchanger, after being transfused to interchanger, methyl alcohol in the vaporizer and water mixed liquid fail back vaporizer again, bottom, described absorption tower also is connected with described interchanger, and the formaldehyde solution of bottom, absorption tower is exported after being transfused to interchanger again; In formaldehyde production, methyl alcohol in the vaporizer and water mixed liquid input heat exchanger are imported this interchanger with the formaldehyde solution of bottom, absorption tower simultaneously, make methyl alcohol and water mixed liquid and formaldehyde solution carry out heat exchange.
Described in the methyl alcohol evaporization process, the weight part optimum ratio of the first alcohol and water of feeding is 1000 ﹕ 48, and vaporization temperature is controlled at 65～70 ℃.
The invention has the beneficial effects as follows: 1, the present invention by in formaldehyde production with the methyl alcohol in the vaporizer and water mixed liquid input heat exchanger and simultaneously the formaldehyde solution of bottom, absorption tower is also imported this interchanger, make methyl alcohol and water mixed liquid and formaldehyde solution carry out heat exchange, the thermal energy transfer of formaldehyde solution is given methyl alcohol and water mixed liquid, the heat energy of bottom, absorption tower formaldehyde solution is fully used, can save the heat energy of Formaldehyde Production, reduce the Formaldehyde Production cost.2, after the thermal energy transfer of the formaldehyde solution of bottom, absorption tower was given vaporizer interior methyl alcohol and water mixed liquid among the present invention, the temperature of formaldehyde solution was effectively descended, and can reduce and use water coolant to cool off, and greatly reduces the cooling load of cooling tower.3, utilization of the present invention helps improving the yield and the stability of Formaldehyde Production.
Embodiment
The present invention will be further described below in conjunction with specific embodiment:
Embodiment 1
Heat integration method in a kind of formaldehyde production comprises that methyl alcohol evaporation, high temperature oxidation and the dehydrogenation of Formaldehyde Production, formaldehyde gas absorb into the formaldehyde solution operation by water.In the methyl alcohol evaporization process, in vaporizer, feed the first alcohol and water, the weight part proportioning of the first alcohol and water that feeds is 1000 ﹕ 48, under the condition of bubbling air, evaporate, vaporization temperature is controlled at 65～70 ℃, the bottom of vaporizer is connected with interchanger, fails back vaporizer again after methyl alcohol in the vaporizer and water mixed liquid can be transfused to interchanger; Methyl alcohol evaporation back forms the ternary gas of methyl alcohol, water and air, and this ternary gas enters and carries out high temperature oxidation and dehydrogenation reaction in the reactor and generate formaldehyde gas under the catalyst for electrolytic silver effect; Formaldehyde gas forms formaldehyde solution by the water absorption after entering the absorption tower, formaldehyde solution comes together in the bottom, absorption tower after cooling, the temperature of the formaldehyde solution of this bottom, absorption tower is controlled at 80～85 ℃, the bottom on absorption tower also is connected with the interchanger that base of evaporator is connected, and the formaldehyde solution of bottom, absorption tower is exported after being transfused to interchanger again.In formaldehyde production, with methyl alcohol in the vaporizer and water mixed liquid input heat exchanger, simultaneously the formaldehyde solution of bottom, absorption tower is imported this interchanger, methyl alcohol and water mixed liquid and formaldehyde solution are carried out heat exchange, the thermal energy transfer of formaldehyde solution is given methyl alcohol and water mixed liquid, make the temperature of the formaldehyde solution of bottom, absorption tower obtain descending, and the temperature of methyl alcohol in the vaporizer and water mixed liquid obtain raising.
Embodiment 2
Heat integration method in a kind of formaldehyde production comprises that methyl alcohol evaporation, high temperature oxidation and the dehydrogenation reaction of Formaldehyde Production, formaldehyde gas absorb into the formaldehyde solution operation by water.In the methyl alcohol evaporization process, in vaporizer, feed the first alcohol and water, the weight part proportioning of the first alcohol and water that feeds is 1000 ﹕ 45, under the condition of bubbling air, evaporate, vaporization temperature is controlled at 60～65 ℃, the bottom of vaporizer is connected with interchanger, fails back vaporizer again after methyl alcohol in the vaporizer and water mixed liquid can be transfused to interchanger; Methyl alcohol evaporation back forms the ternary gas of methyl alcohol, water and air, and this ternary gas enters and carries out high temperature oxidation and dehydrogenation behind the reactor and generate formaldehyde gas under the catalyst for electrolytic silver effect; Formaldehyde gas forms formaldehyde solution by the water absorption after entering the absorption tower, formaldehyde solution comes together in the bottom, absorption tower after cooling, the temperature of the formaldehyde solution of this bottom, absorption tower is controlled at 75～80 ℃, the bottom on absorption tower also is connected with the interchanger that base of evaporator is connected, and the formaldehyde solution of bottom, absorption tower is exported after being transfused to interchanger again.In formaldehyde production, with methyl alcohol in the vaporizer and water mixed liquid input heat exchanger, simultaneously the formaldehyde solution of bottom, absorption tower is imported this interchanger, methyl alcohol and water mixed liquid and formaldehyde solution are carried out heat exchange, the thermal energy transfer of formaldehyde solution is given methyl alcohol and water mixed liquid, make the temperature of the formaldehyde solution of bottom, absorption tower obtain descending, and the temperature of methyl alcohol in the vaporizer and water mixed liquid obtains raising, can save the heat energy of Formaldehyde Production, reduce the Formaldehyde Production cost.
Embodiment 3
Heat integration method in a kind of formaldehyde production comprises that methyl alcohol evaporation, high temperature oxidation and the dehydrogenation reaction of Formaldehyde Production, formaldehyde gas absorb into the formaldehyde solution operation by water.In the methyl alcohol evaporization process, in vaporizer, feed the first alcohol and water, the weight part proportioning of the first alcohol and water that feeds is 1000 ﹕ 50, under the condition of bubbling air, evaporate, vaporization temperature is controlled at 60～70 ℃, the bottom of vaporizer is connected with interchanger, fails back vaporizer again after methyl alcohol in the vaporizer and water mixed liquid can be transfused to interchanger; Methyl alcohol evaporation back forms the ternary gas of methyl alcohol, water and air, and this ternary gas enters and carries out high temperature oxidation and dehydrogenation reaction behind the reactor and generate formaldehyde gas under the catalyst for electrolytic silver effect; Formaldehyde gas forms formaldehyde solution by the water absorption after entering the absorption tower, formaldehyde solution comes together in the bottom, absorption tower after cooling, the temperature of the formaldehyde solution of this bottom, absorption tower is controlled at 75～85 ℃, the bottom on absorption tower also is connected with the interchanger that base of evaporator is connected, and the formaldehyde solution of bottom, absorption tower is exported after being transfused to interchanger again.In formaldehyde production, with methyl alcohol in the vaporizer and water mixed liquid input heat exchanger, simultaneously the formaldehyde solution of bottom, absorption tower is imported this interchanger, methyl alcohol and water mixed liquid and formaldehyde solution are carried out heat exchange, the thermal energy transfer of formaldehyde solution is given methyl alcohol and water mixed liquid, make the temperature of the formaldehyde solution of bottom, absorption tower obtain descending, and the temperature of methyl alcohol in the vaporizer and water mixed liquid obtains raising, can save the heat energy of Formaldehyde Production, reduce the Formaldehyde Production cost.
Claims (2)
1. the heat integration method in the formaldehyde production, methyl alcohol evaporation, high temperature oxidation and the dehydrogenation, the formaldehyde gas that comprise Formaldehyde Production absorb into the formaldehyde solution operation by water, it is characterized in that: in the methyl alcohol evaporization process, in vaporizer, feed the first alcohol and water, the weight part proportioning of the first alcohol and water that feeds is 1000 ﹕ 45～50, and under the condition of bubbling air, evaporate, vaporization temperature is controlled at 60～70 ℃; Described formaldehyde gas absorbs in the formaldehyde solution operation by water, and the temperature of the formaldehyde solution of bottom, absorption tower is controlled at 75～85 ℃; The bottom of described vaporizer is connected with interchanger, after being transfused to interchanger, methyl alcohol in the vaporizer and water mixed liquid fail back vaporizer again, bottom, described absorption tower also is connected with described interchanger, and the formaldehyde solution of bottom, absorption tower is exported after being transfused to interchanger again; In formaldehyde production, methyl alcohol in the vaporizer and water mixed liquid input heat exchanger are imported this interchanger with the formaldehyde solution of bottom, absorption tower simultaneously, make methyl alcohol and water mixed liquid and formaldehyde solution carry out heat exchange.
2. the heat integration method in a kind of formaldehyde production according to claim 1 is characterized in that: described in the methyl alcohol evaporization process, the weight part proportioning of the first alcohol and water of feeding is 1000 ﹕ 48, and described vaporization temperature is controlled at 65～70 ℃.
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| CN2011101837221A CN102295542A (en) | 2011-07-01 | 2011-07-01 | Integrated utilization method of heat in formaldehyde production process |
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| CN2011101837221A CN102295542A (en) | 2011-07-01 | 2011-07-01 | Integrated utilization method of heat in formaldehyde production process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104693015A (en) * | 2015-03-24 | 2015-06-10 | 江苏凯茂石化科技有限公司 | Methanol evaporation and oxidation process device for production of silver-method methanal |
| CN104763486A (en) * | 2015-03-24 | 2015-07-08 | 江苏凯茂石化科技有限公司 | Formaldehyde waste heat power generation method and generator set thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5315307A (en) * | 1976-07-27 | 1978-02-13 | Mitsui Toatsu Chem Inc | Recovery of waste heat from formaldehyde gas |
| JPS5982329A (en) * | 1982-11-02 | 1984-05-12 | Koei Chem Co Ltd | Recovery of waste heat from formaldehyde reaction gas |
| CN1036755A (en) * | 1988-02-03 | 1989-11-01 | 旭化成工业株式会社 | The method for preparing formaldehyde and derivative thereof |
| CN1314334A (en) * | 2000-03-21 | 2001-09-26 | 上海吴泾化工有限公司 | Method for producing formaldehyde by using crude methanol as coproduct of synthetic ammonia |
| CN201406390Y (en) * | 2009-05-12 | 2010-02-17 | 范轩羽 | Dealcoholized high-concentration formaldehyde production equipment |
-
2011
- 2011-07-01 CN CN2011101837221A patent/CN102295542A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5315307A (en) * | 1976-07-27 | 1978-02-13 | Mitsui Toatsu Chem Inc | Recovery of waste heat from formaldehyde gas |
| JPS5982329A (en) * | 1982-11-02 | 1984-05-12 | Koei Chem Co Ltd | Recovery of waste heat from formaldehyde reaction gas |
| CN1036755A (en) * | 1988-02-03 | 1989-11-01 | 旭化成工业株式会社 | The method for preparing formaldehyde and derivative thereof |
| CN1314334A (en) * | 2000-03-21 | 2001-09-26 | 上海吴泾化工有限公司 | Method for producing formaldehyde by using crude methanol as coproduct of synthetic ammonia |
| CN201406390Y (en) * | 2009-05-12 | 2010-02-17 | 范轩羽 | Dealcoholized high-concentration formaldehyde production equipment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104693015A (en) * | 2015-03-24 | 2015-06-10 | 江苏凯茂石化科技有限公司 | Methanol evaporation and oxidation process device for production of silver-method methanal |
| CN104763486A (en) * | 2015-03-24 | 2015-07-08 | 江苏凯茂石化科技有限公司 | Formaldehyde waste heat power generation method and generator set thereof |
| CN104763486B (en) * | 2015-03-24 | 2016-04-13 | 江苏凯茂石化科技有限公司 | Formaldehyde method for power generation by waste heat and generator set thereof |
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Application publication date: 20111228 |