Process for the evaporation of volatile alcohols and sulphur in the course of black liquor evaporation专利检索-多效蒸馏净化水处理专利检索查询-专利查询网

Process for the evaporation of volatile alcohols and sulphur in the course of black liquor evaporation

阅读：999发布：2023-10-24

专利汇可以提供Process for the evaporation of volatile alcohols and sulphur in the course of black liquor evaporation专利检索，专利查询，专利分析的服务。并且A process is provided for reducing the emission of volatile alcohols and sulphur compounds during the evaporation of black liquor in several effects in the sulphate cellulose process. The liquor in those effects which are working with the most diluted liquor is evaporated in two or more steps on the same pressure level. The liquor is carried through the steps in series, the vapours obtained from these steps are condensed and at least a part of the condensates obtained are reintroduced into the process or purified by means of distillation.，下面是Process for the evaporation of volatile alcohols and sulphur in the course of black liquor evaporation专利的具体信息内容。

权利要求

1. A process for reducing the emission of volatile alcohols and sulphur compounds in the evaporation of black liquor in multiple effects in the sulphate cellulose process and in which at least those effects working with the most diluted liquor themselves comprise several serially connected steps, comprising preevaporating the liquor in those effects which are working with the most diluted liquor in two or more steps at the same pressure level, carrying the liquor through the steps in series, condensing the vapours obtained from these steps and reintroducing at least a part of the condensates thus obtained into the process.

2. The process of claim 1, in which the liquor of at least two subsequent evaporation effects of higher concentration is evaporated in two or more steps in each effect.

3. The process of claim 1, in which at least 30 percent, of the evaporation vapour from those effects which work with the most diluted liquor is condensed in a first methanol-poor fraction and the rest in a second methanol-enriched fraction, which fractions are reintroduced into the process or purified by distillation.

4. The process of claim 1, in which the final evaporation of the most concentrated liquor is carried out in parallel with liquor received from an intermediate evaporation effect following pre-evaporation.

5. The process of claim 1, in which the vapours after condensation are supplied to a distillation column which is working with reflux and that the heat content of the vapours leaving the distillation column is recovered in the process.

6. The process of claim 5, in which the pressure in the top of the distillation column is kept at from 0.5 to 4 atm.

7. The process of claim 5, in which the reflux to the distillation column is obtained by bringing the vapour leaving the column to condense partially in indirect heat exchange with liquor in a liquor evaporator, in which the evaporation is carried out at a lower pressure than the pressure prevailing in the distillation column, and in which evaporator uncondensed vapor resulting from the incomplete condensation and containing volatile alcohols and sulphur compounds after pressure-reduction is discharged to destruction or recovery and from which evaporator the condensed liquid phase obtained in said incomplete condensation in the liquor evaporator is returned to the distillation column.

说明书全文

相关专利内容

标题	发布/更新时间	阅读量
一种农药悬浮剂的制备方法	2021-02-16	1
一种多功能汽车防冻液	2021-04-05	0
环保型砂浆回收工艺	2021-12-03	0
卡泊芬净制剂	2022-04-26	3
土壤速效钾快速测定方法	2021-02-24	1
滋润肌肤的植物精油	2020-06-13	0
一种巴斯玛丙素及其制备方法	2020-06-17	2
用于苹果矮化砧木的嫩枝扦插繁殖方法和促根剂组合物	2021-05-20	0
다가 알코올 정제 방법 및 장치	2021-09-30	1
一种制作美容水的无膜电解水装置	2021-01-08	2

高效检索全球专利

专利汇是专利免费检索,专利查询,专利分析-国家发明专利查询检索分析平台，是提供专利分析，专利查询，专利检索等数据服务功能的知识产权数据服务商。

我们的产品包含105个国家的1.26亿组数据，免费查、免费专利分析。

申请试用

分析报告

专利汇分析报告产品可以对行业情报数据进行梳理分析，涉及维度包括行业专利基本状况分析、地域分析、技术分析、发明人分析、申请人分析、专利权人分析、失效分析、核心专利分析、法律分析、研发重点分析、企业专利处境分析、技术处境分析、专利寿命分析、企业定位分析、引证分析等超过60个分析角度，系统通过AI智能系统对图表进行解读，只需1分钟，一键生成行业专利分析报告。

申请试用

多效蒸馏热门专利

热门分类

Process for the evaporation of volatile alcohols and sulphur in the course of black liquor evaporation

该功能需要专业版企业版VIP权限，您可以：