Formaldehyde Plants With Off-Gas Circulation
The reboiler process is the traditional formaldehyde production technology.During 1990 and 2010, Kaimao Company has built several hundred of these formaldehyde plants.
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Specification of Product
Consumption Quota of Feedstock, Auxiliaries & Power
| S/N | Component | Index |
|---|---|---|
| 1 | Formaldehyde | 37-42% |
| 2 | Methanol | ≤1 wt. % |
| 3 | Formic Acid | ≤0.01 g/100 ml |
| 4 | Chloride | ≤0.0025 g/100 ml |
| 5 | Ashes | ≤0.01 g/100 ml |
Consumption Quota of Feedstock, Auxiliaries & Power
| S/N | Particular | Index | Remark |
|---|---|---|---|
| 1 | Feedstock & Auxiliaries | ||
| 1) | Methanol（99.5％） | 0.445 ton for per ton of 37% formalin product | Expectation:442 |
| 2) | Catalyst ( Silver ) | As-per the Capacity | Single production line |
| 2 | Civil Utilities | ||
| 1) | Circulating Cooling Water | 40 ton for per ton of 37% formalin product | |
| 2) | Desalted Water | As-per the process | |
| 3) | Power Electricity (Voltage:415/250V； Frequency 50±0.5Hz) | 28 KWh for per ton of 37% formalin product | With 200kvA transformer |
| 4) | Steam for Startup(0.2Mpa) | 900kg/h | Need 3～4hrs |
| 5) | Export Steam as By-product(0.25MPa) | 0kg per ton of 37% formalin product | Without the Off-gas Boiler |
| 6) | Instrumental Air (P=0.5-0.7MPa（G）) | As-per the Capacity |
Process Digram
Layout Drawing
Layout Drawing
| Project | Type and parameter | Production line | Finish Date |
|---|---|---|---|
| Henan Xiayi County Fuming Chemical Co., LTD | Whole set of 30K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2007．1 |
| Fujian ProvinceOP Chemical Co., LTD | Whole set of 30K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2007．2 |
| Hengshun Chemical Co., LTD in Lishui city, Zhejiang Province | Whole set of 30K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2007．2 |
| Guosheng Chemical Co., LTD in Quzhou City, Zhejiang Province | Whole set of 30K tpa formaldehyde equipment reactor revamping and technical service | 1 | 2007．3 |
| Liantai Chemical Co., LTD in Chengdu, Sichuan Province | Whole set of 80k tpa formaldehyde project with off gas circulation process | 1 | 2007．3 |
| Tianjin Gushang Petrochemical co., LTD | 20k tpa*2 sets of formaldehyde equipment reactor revamping | 2 |
2007．3 2007．5 |
| Xihong Wood Industry Co., LTD in Sihong County, Suqian City | Whole set of 30K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2007．3 |
| Hebei Langfang Xiangyun Wood Industry Co., LTD | Whole set of 30k tpa formaldehyde project | 1 | 2007．3 |
| Jiangxi Xinfeng Guanmei Chemical Co., LTD | Whole set of 40K tpa *2 formaldehyde non-standard equipments and technical sevice | 1 |
2007．4 2009．5 |
| Shandong Jining Sanlian Wood Industry Co., LTD | Whole set of 30K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2007．4 |
| Shanghai Ollie International Trade co., LTD. (To Pakistan) | Whole set of 30K tpa formaldehyde equipment off gas treatment revamping | 1 | 2007．4 |
| Hebei Hao City The Chemical Co., LTD | Whole set of 30K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2007．5 |
| Yeji Linxing Fine chemical Co., LTD in anhui province | Whole set of 30K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2007．5 |
| TOA in Thailand | Whole set of 30K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2007．5 |
| Zhejiang Jiashan Rongma Chemical Co., LTD | Whole set of 60K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2007．6 |
| Vietnam Industrial Chemical Research Institute | Whole set of 15k tpa formaldehyde project | 1 | 2007．6 |
| Zhejiang Huzhou Jing’ao New Type Material Co., LTD | Whole set of 75K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2007．6 |
| Zhongguang Chemical Co., LTD in Maoming Guangdong | Whole set of 50K tpa formaldehyde non-standard equipments and technical sevice(off gas circulation process) | 1 | 2007．7 |
| Sichuan mianyang Sanjiang Chemical Co., LTD | Whole set of 30K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2007．7 |
| Guangxi liuzhou Chemical Co., LTD | Whole set of 25K tpa formaldehyde non-standard equipments and technical sevice(Totally 17 sets) | 1 | 2007．8 |
| Sichuan Beichuan Qiang Autonomous County YuXin Chemical Co., LTD | Whole set of 50K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2007．9 |
| Mianyang Jiancheng Chemical Co., LTD | Whole set of 50k tpa formaldehyde project | 1 | 2007．9 |
| Sichuan An county Xianglong Medium Density Fiberboard Factory | Whole set of 60k tpa formaldehyde project | 1 | 2007．9 |
| Hebei Denuo Chemical Co., LTD | Whole set of 50K tpa formaldehyde non-standard equipments and technical sevice( off gas circulation process) | 1 | 2007．9 |
| Guangxi Baise Xinlong Industry &Trade Co., LTD | Whole set of 50k tpa formaldehyde project( off gas circulation process) | 1 | 2007．12 |
| Shanghai Ollie International Trade Co., LTD. | Whole set of 25k tpa formaldehyde project | 1 | 2007．12 |
| Pengshan County Sanjiang Chemical Co., LTD | Whole set of 50k tpa formaldehyde project | 1 | 2008．1 |
| Chengdu Yuyuan Chemical Co., LTD | 20k tpa formaldehyde equipment reactor revamping and technical service | 1 | 2008．3 |
| Fujian Province Jianou Huafeng Chemical Co., LTD | 30k tpa formaldehyde equipment reactor revamping and technical service | 1 | 2008．3 |
| Zhejiang Province Lishui City Hengshun Chemical Co., LTD | Whole set of 50K tpa formaldehyde non-standard equipments and technical sevice(off gas circulation process) | 1 | 2008．3 |
| PT. Lycon Asia Mandiri( Indonesia) | Whole set of 60K tpa *2 formaldehyde non-standard equipments and technical sevice | 1 |
2008．4 2009．7 |
| Jinan Shengquan Haiwosi Resin Co., LTD | Whole set of 50K tpa formaldehyde non-standard equipments and technical sevice Whole set of 60K tpa formaldehyde non-standard equipments and technical sevice | 2 |
2008．7 2009．12 |
| Tianshan Environmental Dimethyl Ether Co., LTD | Whole set of 50k tpa formaldehyde project and technical service( off gas circulation process） | 1 | 2008．7 |
| Guilin Sufeng Fine Chemical Co., LTD | Whole set of 30k tpa formaldehyde project and technical service( off gas circulation process） | 1 | 2008．8 |
| Hubei Yinlu Chemical Co., LTD | Whole set of 30K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2008．10 |
| Quzhou City Zesheng Molding Co., LTD | Whole set of 60K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2008．10 |
| Shanxi Weinan Hongfu Chemical Co., LTD | Whole set of 30K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2008．12 |
| Hubei Xianning City Yinhua Chemical Plant | Whole set of 50K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2009．1 |
| Nanning Guangyuan Chemical Co., LTD | Whole set of 30k tpa formaldehyde project and technical service( off gas circulation process） | 2009．2 | |
| Chuzhou lianhua Synthetic Material Co., LTD | Whole set of 50K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2009．2 |
| Zhuhai Great Wall Chemical Industry Co., LTD | Whole set of 50K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2009．3 |
| Ningbo Yulong Industry and Trade Industrial Co., LTD | Whole set of 70K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2009．4 |
| Jizhou City Yinhe Chemical Co., LTD | 50k tpa formaldehyde equipment reactor, filtr, reactor revamping and technical service 40kt /a formaldehyde plant | 1 | 2009．4 |
| Xinfeng Yuhua medium Fiberboard Co., LTD | Whole set of 30K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2009．7 |
| Xingtai Xuyang Chemical Co., LTD | Whole set of 30K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2009．9 |
| Balaji Formalin Pvt Ltd in India | Whole set of 40K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2009．8 |
| Puyang City Kabote Chemical Co., LTD | Whole set of 30K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2009．11 |
| Dayu county xintai Chemical Co., LTD | Whole set of 50K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2010．3 |
| Mianyang city xianglong Chemical Co., LTD | Whole set of 30K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2010．4 |
| Jin zhai Senxin Building Materials Additives Co., LTD | Whole set of 40K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2010．9 |
| Xiangfang Zedong Chemical Co.,LTD | 30k tpa formaldehyde equipment technology revamping project | 1 | 2010．9 |
| Dovechem Chemical Industries（KTN）SDN BHD | 40k tpa formaldehyde equipment technology revamping project | 1 | 2010．12 |
| Shakoor Brothers Plywood Industries (PVT) LTD. | Whole set of 20K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2010．12 |
| Supper Chemical (PVT) LTD. | Whole set of 50K tpa formaldehyde non-standard equipments and technical sevice | 1 | 2010．12 |
| Longkou Haili Chemical Plant |
Whole set of 30K tpa formaldehyde non-standard equipments and technical sevice Whole set of 10K tpa formaldehyde non-standard equipments and technical sevice |
2 | 2011．4 |
| CangXi Qian Longlin Chemical Co., LTD | 40K tpa formaldehyde customized equipmeny and technology service | 1 | 2012.02 |
| Fujian Furen wood Industry Co., LTD | 40K tpa formaldehyde EPC project | 1 | 2012.04 |
| ACTION in India | 40,000tpa formaldehyde plant,with highest concentration of 45% | 1 | 2012.09 |
| Xingtai Xuyang Coal Chemical Co., LTD | 50K tpa formaldehyde customized equipmeny and technology service | 1 | 2012.07 |
| AKOLICE in India | 20K tpa formaldehyde plant | 1 | 2014.06 |
The reboiler process is the traditional formaldehyde production technology. After absorbing all kinds of reboiler processes at home and abroad, and making process, equipment and automation optimizing, Kaimao technical team makes its optimization. During 1990 and 2010, Kaimao Company has built several hundred of these formaldehyde plants.
The advantages include the stable technology, simple cooperation and less investment. The production capacity is 60TPD-200TPD. The concentration can be flexibly adopted during 37%~ 42%.
Air, after filtering, washing and heating, comes to mixer. Steam via filtration comes into mixer. The circulation off gas from the top of absorber 2#, after heating, comes into mixer. The methanol liquid after filtration comes into methanol reboiler, the methanol liquid –gas mixture from the reboiler comes into methanol evaporator, after liquid-gas separation in the evaporator, the methanol gas comes into the mixer as well. The technology uses steam to heat methanol, having evaporation.
The above four kinds of gas, after complete mixing in the mixer, gets the last filtration and then it comes the methanol reactor, having Redox reaction and getting formaldehyde gas. The formaldehyde gas from reactor includes steam, nitrogen, oxygen and hydrogen etc, it needs the next absorption to get formaldehyde solution.
Two independent absorbers have been set in our formaldehyde process. After complex absorption, heat exchanging, we can get products of formaldehyde solution. In addition, the off gas is discharged from the top of absorber 2#.
Part of the off gas comes into the off gas roots blower for circulation. Other parts have been put into furnace for burning, getting steam with all kinds of pressure.
The advantages include the stable technology, simple cooperation and less investment. The production capacity is 60TPD-200TPD. The concentration can be flexibly adopted during 37%~ 42%.
Air, after filtering, washing and heating, comes to mixer. Steam via filtration comes into mixer. The circulation off gas from the top of absorber 2#, after heating, comes into mixer. The methanol liquid after filtration comes into methanol reboiler, the methanol liquid –gas mixture from the reboiler comes into methanol evaporator, after liquid-gas separation in the evaporator, the methanol gas comes into the mixer as well. The technology uses steam to heat methanol, having evaporation.
The above four kinds of gas, after complete mixing in the mixer, gets the last filtration and then it comes the methanol reactor, having Redox reaction and getting formaldehyde gas. The formaldehyde gas from reactor includes steam, nitrogen, oxygen and hydrogen etc, it needs the next absorption to get formaldehyde solution.
Two independent absorbers have been set in our formaldehyde process. After complex absorption, heat exchanging, we can get products of formaldehyde solution. In addition, the off gas is discharged from the top of absorber 2#.
Part of the off gas comes into the off gas roots blower for circulation. Other parts have been put into furnace for burning, getting steam with all kinds of pressure.
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