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    • 4. 发明申请
    • A METHOD OF SEPARATING SULPHUR COMPOUNDS
    • 一种分离硫化合物的方法
    • WO1994020677A1
    • 1994-09-15
    • PCT/SE1994000184
    • 1994-03-04
    • CHEMREC AKTIEBOLAGSTIGSSON, Lars
    • CHEMREC AKTIEBOLAG
    • D21C11/12
    • D21C11/0071B01D53/1462B01D53/52C01B17/167C01B17/168D21C11/06Y02P20/152Y02P70/24
    • A method of separating sulphur compounds out of a gas containing carbon dioxide and hydrogen sulphide, in a gas washing system, said gas being obtained by gasification of spent cellulose liquor. According to the invention the gas washing system has a gas-liquid contact zone (5) operating at a pressure exceeding atmospheric pressure as well as a regeneration zone (8) operating at a pressure substantially less than the pressure in the gas-liquid contact zone (5). The carbon dioxide partial pressure in the gas prior to entering the gas-liquid contact zone exceeds 0.2 atm. Furthermore the gas comes into contact with an alkaline absorption liquid in the gas-liquid contact zone, and alkaline liquid containing alkali hydrogen sulphide is withdrawn from the gas-liquid contact zone and transferred to the regeneration zone, in which zone hydrogen sulphide is expelled from said liquid containing alkali hydrogen sulphide and withdrawn in the form of a gas.
    • 一种在气体洗涤系统中从包含二氧化碳和硫化氢的气体中分离出硫化合物的方法,所述气体是通过将废纤维素液体气化获得的。 根据本发明,气体清洗系统具有在超过大气压力的压力下操作的气液接触区(5)以及在基本上小于气液接触区中的压力的​​压力下操作的再生区(8) (5)。 进入气液接触区之前气体中的二氧化碳分压超过0.2atm。 此外,气体与气 - 液接触区中的碱性吸收液体接触,并且含有碱金属硫化氢的碱性液体从气 - 液接触区域中排出并转移到再生区,在该再生区中,硫化氢被排出 所述液体含有碱金属硫化氢并以气体形式排出。
    • 5. 发明申请
    • METHOD FOR THE RECOVERY OF CELLULOSE SPENT LIQUORS
    • 纤维素液体回收方法
    • WO1994017240A1
    • 1994-08-04
    • PCT/SE1994000028
    • 1994-01-18
    • CHEMREC AKTIEBOLAGSTIGSSON, LarsBACKLUND, Åke
    • CHEMREC AKTIEBOLAG
    • D21C11/12
    • D21C11/125D21C11/04D21C11/063Y02P70/24
    • The present invention relates to a method for producing pulp cooked under alkaline conditions, in which method cellulose-containing material is brought into contact, in a digester, with an alkaline cooking liquor containing dissolved potassium and sodium compounds, with used spent cooking liquor being separated off from the cellulose-containing material and withdrawn for the recovery of energy and chemicals, wherein: a) the molar ratio, calculated as K/K + Na, between potassium and sodium in a withdrawn spent cooking liquor exceeds 0.25; b) the withdrawn spent cooking liquor is concentrated with respect to its content of solid material and is subjected to partial oxidation in a reactor, resulting in the formation of a combustible gas which is withdrawn from the reactor; c) oxygen-containing gas is supplied to the reactor in order to support the partial oxidation; d) the operating temperature in the reactor is adjusted to between 400-1200 DEG C; e) the combustible gas, which is obtained in association with the partial oxidation and which contains entrained solid and/or liquid alkali metal compounds, is separated from the major part of its content of alkali and used for the production of useful energy; f) the alkali metal compounds which have been separated off from the process gas are dissolved in liquid, which liquid is used either wholly or in part for preparing cooking liquor.
    • 本发明涉及一种生产在碱性条件下煮熟的纸浆的方法,其中使用含有溶解的钾和钠化合物的碱性蒸煮液在消化器中与含纤维素材料接触的方法,将分离出的废蒸煮液分离 从所述含纤维素材料中取出并取出以回收能量和化学品,其中:a)在抽出的废蒸煮液中钾和钠之间的K / K + Na计算的摩尔比超过0.25; b)将取出的废蒸煮液相对于其固体物质的含量进行浓缩,并在反应器中进行部分氧化,形成从反应器中排出的可燃气体; c)向反应器供应含氧气体以支持部分氧化; d)将反应器中的操作温度调节至400-1200℃; e)与部分氧化相关并且含有夹带的固体和/或液体碱金属化合物获得的可燃气体与其碱的主要部分分离并用于生产有用能量; f)从工艺气体中分离的碱金属化合物溶于液体,该液体全部或部分用于制备蒸煮液。
    • 6. 发明申请
    • A METHOD OF PREPARING DIGESTING LIQUOR
    • 一种制备消泡液的方法
    • WO1993012288A1
    • 1993-06-24
    • PCT/SE1992000855
    • 1992-12-11
    • CHEMREC AKTIEBOLAGNILSSON, Bengt
    • CHEMREC AKTIEBOLAG
    • D21C11/12
    • D21C11/125D21C11/04Y02P40/44
    • A method of preparing digesting liquor having high sulphidity from a spent liquor obtained from digesting cellulosic fiber material, preferably without a conventional causticizing step is described, said method comprising thermal decomposition of the spent liquor under reducing conditions in a reactor at a pressure of from atmospheric pressure up to about 150 bar and at a temperature of about 500 to 1600 DEG C so that a combustible gas phase containing hydrogen sulphide is formed in the reactor and extracted therefrom, and a phase of solid or molten material comprising substantially sodium sulphide which is dissolved in aqueous liquid to produce said digesting liquor. According to the invention hydrogen sulphide is recovered from the gas phase and is returned to the reactor to be present during the thermal decomposition of the spent liquor.
    • 描述了从消耗纤维素纤维材料获得的废液中制备具有高硫化物的消化液的方法,优选不经常规苛化步骤,所述方法包括在还原条件下在反应器中在大气压力下热分解废液 压力高达约150巴,温度为约500至1600℃,从而在反应器中形成含有硫化氢的可燃气相,并从其中提取,并将基本上溶解硫化钠的固体或熔融材料的相 在水性液体中以产生所述消化液。 根据本发明,从气相回收硫化氢,并且在废液的热分解期间将其返回到反应器中以存在。
    • 7. 发明申请
    • METHOD FOR RECOVERY OF CHEMICALS AND ENERGY FROM SPENT LIQUOR
    • 化学品的回收方法和饮料中的能量的方法
    • WO1993002249A1
    • 1993-02-04
    • PCT/SE1992000477
    • 1992-06-29
    • CHEMREC AKTIEBOLAGKIGNELL, Jan-Erik
    • CHEMREC AKTIEBOLAG
    • D21C11/12
    • D21C11/125D21C11/066Y02E20/12
    • The present invention relates to a process for the extraction of chemicals and energy from cellulose spent liquors, preferably black liquor obtained in the sulphate cellulose process, wherein the spent liquor is introduced into a gasification reactor (1) for pyrolysis and partial incineration, wherein an energy-rich gas is formed containing particles of inorganic chemical melt, the said gas mixture is conveyed out of the reactor (1) and concomitantly cooled by injection of a finely-divided cooling medium, preferably water, in connection with the departure from the reactor (1), the said mixture of gas and non-adhesive chemical particles is led from a cooling chamber (2) arranged in connection with the gasification reactor (1) to a separating arrangement (3), preferably a cyclone, where the non-adhesive chemical particles are separated from the gas, the gas stream, essentially cleaned of chemical particles, is taken out via an upper connection on the separating arrangement (3) while the chemical particles are taken out via a lower connection on the separating arrangement (3), wherein the melt particles leaving the reactor in the gas mixture are cooled to a temperature where they have at least partially solidified and been converted to solid phase, so that the particles included in the gas mixture are non-adhesive, and that a subsequent heat exchange of the separated gas is carried out from an essentially preserved temperature level.
    • 本发明涉及从纤维素废液中提取化学品和能量的方法,优选在硫酸纤维素方法中获得的黑液,其中将废液引入用于热解和部分焚化的气化反应器(1)中,其中 形成含有无机化学熔体颗粒的能量丰富的气体,所述气体混合物从反应器(1)输送出来,并伴随着与离开反应器的注入相分离的冷却介质(优选为水)冷却介质 (1)中,所述气体和非粘合剂化学颗粒的混合物从与气化反应器(1)连接的冷却室(2)引入分离装置(3),优选旋风分离器, 粘合剂化学颗粒与气体分离,基本上清洁的化学颗粒的气流通过分离装置(3)上的上部连接被取出,而 化学颗粒通过分离装置(3)上的较低连接件被取出,其中离开气体混合物中的反应器的熔体颗粒被冷却到其至少部分固化并被转化成固相的温度,使得 包含在气体混合物中的颗粒是非粘合剂的,并且分离的气体的后续热交换从基本保持的温度水平进行。