【中/English】國(guó)際上廣泛應(yīng)用的漿料洗滌設(shè)備

Technical Features and Application of the Twin Roll Wash Press

[汶瑞機(jī)械（山東）有限公司]

Wenrui Machinery (Shandong) Co.,Ltd.

漿料洗滌是造紙行業(yè)制漿過(guò)程節(jié)能減排的重要環(huán)節(jié)，高效節(jié)能的洗漿設(shè)備是實(shí)現(xiàn)其功效的重要保障。汶瑞機(jī)械（山東）有限公司把握行業(yè)形勢(shì)，緊跟國(guó)際前沿技術(shù)，積極開(kāi)展創(chuàng)新工作，研發(fā)了高濃出漿的雙輥壓榨洗漿機(jī)，并實(shí)現(xiàn)了從小規(guī)格到大產(chǎn)能，從單機(jī)可靠到單高效的發(fā)展目標(biāo)，達(dá)到了國(guó)際同類(lèi)產(chǎn)品的先進(jìn)水平。

Efficient pulp washing equipment plays a vital role in the energy conservation and emission reduction of the pulping process. The twin roll wash press with high outlet consistency was lately developed by Wenrui Machinery (Shandong) Co., Ltd. Being able to realize capacity expansion and efficient operation, it has achieved widespread application.

1、工作原理及特點(diǎn) Operation principles and features

汶瑞公司生產(chǎn)的雙輥壓榨洗漿機(jī)，按結(jié)構(gòu)主要分為SJA和SJB兩種類(lèi)型，前者從設(shè)備兩側(cè)進(jìn)漿并具有置換洗滌功能，主要用于制漿過(guò)程的廢液提�。缓笳邚脑O(shè)備底部進(jìn)漿沒(méi)有置換功效，主要用于漿料濃縮。

Twin roll wash press manufactured by Wenrui has two series of SJA and SJB. The former refers to pulp feeding from both sides with replacement washing function, applied to black liquor extraction in pulping line; the later refers to pulp feeding from bottom without replacement function, applied to pulp concentration.

SJA雙輥壓榨洗漿機(jī)集過(guò)濾脫水、置換洗滌、壓榨脫水于一體，漿料從設(shè)備兩側(cè)進(jìn)入布漿裝置，把漿料沿軸向輥面均勻分布，繼而完成三個(gè)階段的洗滌過(guò)程。首先，通過(guò)進(jìn)漿壓力和液位差的共同作用進(jìn)行過(guò)濾脫水，在輥面形成連續(xù)均勻的漿層；其次，隨著壓榨輥轉(zhuǎn)動(dòng)把漿料濃縮到10%-14%的濃度，再用洗滌水進(jìn)行置換洗滌；第三是利用兩壓輥的壓榨力把置換洗滌后的漿料濃縮到預(yù)期的高濃狀態(tài)。

SJA twin roll wash press is combined with dewatering, displacement and pressing functions. Pulp feeds to distributor from both sides, then uniformly distributed on roll surface in axial direction, and the three stages of washing shall be completed. Firstly, pulp dewaters due to feeding pressure and level differential, and forms continuously uniform sheet on roll surface; secondly, as rolls are rotating, pulp is thickened to consistency of 10%-14%, followed by displacement with washing water; thirdly, displaced pulp is thickened to desired high consistency by twin roll mechanical pressing force.

該設(shè)備主要特點(diǎn)如下：

（1） 集過(guò)濾脫水、置換洗滌和擠壓濃縮于一體，用水量少，洗滌效率高。

（2） 單機(jī)生產(chǎn)能力大，可單線配套大規(guī)模生產(chǎn)項(xiàng)目，有效地降低建設(shè)投資及生產(chǎn)成本。

（3） 中濃進(jìn)漿，高濃出漿，大幅度減少流體輸送量，可節(jié)約能耗和提高流送效率。

（4） 重力脫水，不需高程布置，設(shè)備單位面積產(chǎn)能大，占地面積小，土建費(fèi)用少。

（5） 提取的液體量少，回收的廢液濃度高，廢液提取率高，洗滌損失少，能降低蒸發(fā)成本和減少漂白藥品消耗。

（6） 自動(dòng)化控制程度高，易于實(shí)現(xiàn)人工智能操作，安全性能可靠，生產(chǎn)效率高。

Major features:

(1)Combination of dewatering, displacement and pressing, less water consumption, higher washing efficiency;

(2)High production capacity, available to large-scale project, effectively reduce construction investment and production cost;

(3)Medium consistency feeding, high consistency out put , reduce feeding volume and energy consumption, improve concentrating efficiency;

(4)Dewatering by gravity, no requirement for highlevel building, high capacity for unit area, less area occupation, less civil work cost;

(5)Less extracted liquor with higher black liquor concentration, higher extraction rate, less washing loss, reduce evaporating cost and chemical consumption in bleaching;

(6)High automation, easy to artificial intelligent operation, reliable performance, high efficiency.

2、關(guān)鍵技術(shù)及優(yōu)勢(shì)Key techniques and advantages

雙輥壓榨洗漿機(jī)的研制，主要應(yīng)用與優(yōu)化了以下幾方面的關(guān)鍵技術(shù)，使設(shè)備性能更加可靠，技術(shù)優(yōu)勢(shì)明顯提升。

（1）專(zhuān)用的工藝裝備和加工設(shè)備。采用專(zhuān)用工藝裝備和熱裝成型工藝，同時(shí)購(gòu)進(jìn)大型精密數(shù)控加工機(jī)床，保證整支壓榨輥的裝配精度、加工精度和位置精度，確保設(shè)備結(jié)構(gòu)性能；

（2）均勻的布漿裝置。根據(jù)中、低濃漿料流體特性，切實(shí)設(shè)計(jì)流道截面和折流反射結(jié)構(gòu)，既減少流體阻力，又保證布漿均勻，并徹底避免堵漿現(xiàn)象，提高洗滌效率；

（3）合理的流道結(jié)構(gòu)。根據(jù)設(shè)備規(guī)格特征，設(shè)計(jì)適宜的流體通道，注重防止濾液倒流結(jié)構(gòu)設(shè)計(jì)，以提高濾液流速和排液量，并防止濾液倒流反濕現(xiàn)象，提高出漿干度。

（4） 可靠捷便的密封結(jié)構(gòu)。采用液壓升降、鎖緊、氣囊密封等結(jié)構(gòu)，在保證密封可靠的前提下，提高設(shè)備維護(hù)效率及降低勞動(dòng)強(qiáng)度。

（5）先進(jìn)的自動(dòng)化控制手段。嚴(yán)格按照工藝及設(shè)備操作規(guī)程進(jìn)行順序控制設(shè)計(jì)，實(shí)現(xiàn)一鍵安全開(kāi)機(jī)及一鍵安全停機(jī)，防止誤操作。同時(shí)，根據(jù)影響雙輥壓榨洗漿機(jī)的諸多影響因素，確定關(guān)鍵的控制要素，對(duì)其關(guān)聯(lián)要素進(jìn)行自動(dòng)判斷控制，保證設(shè)備運(yùn)行的可靠性、安全性和系統(tǒng)的穩(wěn)定性。

(1)Special process facilities and machining equipment.

Apply tailored process equipment and heat assembly technique, large numerical machining lathe, to ensure the complete assembly accuracy , machining and positioning accuracy for the roll and the performance.

(2)Uniform pulp distributor. Design the channel section and baffl ing refl ex structure. Reduce fluid resistance, ensure an uniform distribution, completely avoid blockage to improve washing efficiency.

(3)Reasonable channel structure. According to equipment specifi cations, a suitable fl ow channel was designed to prevent fi ltrate back fl ow, increase fi ltrate velocity and drainage amount to prevent rewetting and increase outlet consistency.

(4) Reliable, convenient seal arrangement. Apply hydraulic lifting, locking and air seal design to improve equipment maintenance efficiency and reduce labor strength while the sealing is reliable.

(5)Advanced automation control. Implement sequence control design strictly according to process and equipment operation procedures, achieve one-key safe start-up and shutdown to avoid wrong operation. Meanwhile, depending on several factors related to twin roll wash press, decide essentially controlling factors, automatically judge and control related factors to ensure the equipment running reliability, safety and system stability.

3、產(chǎn)品應(yīng)用及效果Product Application and Results

汶瑞公司根據(jù)市場(chǎng)需求，開(kāi)發(fā)了適用于不同規(guī)模和漿種的￠700、￠900、￠1500、￠2200直徑的系列產(chǎn)品，現(xiàn)已生產(chǎn)90多臺(tái)設(shè)備，成功用于國(guó)內(nèi)麥草、葦（荻）、蔗渣、闊葉木化學(xué)漿和闊葉木化機(jī)漿及國(guó)外化學(xué)木漿的洗滌，進(jìn)漿濃度為3%-8%，出漿濃度為20%-30%，運(yùn)行效果比較理想。該設(shè)備在木漿ECF漂白項(xiàng)目成線配套時(shí)，洗選漂的噸漿用水量、污水量和蒸汽消耗分別不高于13m3、10m3和400kg，系統(tǒng)電耗也明顯降低。設(shè)備規(guī)格已能夠滿足不同規(guī)模和不同漿種的配套需求，占企業(yè)產(chǎn)品銷(xiāo)售額的50%以上。

Depending on market demand, different sizes have been developed in 700, 900, 1500, and 220 diameter suitable for different capacity and pulps. More than 90 sets were delivered to wheat straw, reed, bagasse, HW chemical pulping, and HW mechanical pulping mills in China, as well as chemical wood pulping mills overseas. With inlet consistency of 3%-8%, outlet consistency of 20%-30%, good operating performances were achieved. The equipment is also applied in wood based ECF bleaching system, water consumption, effluent discharge and steam consumption for washing and bleaching per ton pulp are 13m3, 10m3 and 400kg respectively, with power consumption obviously reduced. The series have met the demand for various capacity and various pulp grades, accounting for over 50% of the sales volume of Wenrui’s products.

4、結(jié)語(yǔ)Conclusion

汶瑞公司持續(xù)推進(jìn)國(guó)際化發(fā)展戰(zhàn)略，不斷加大國(guó)際市場(chǎng)開(kāi)發(fā)力度。目前已有30多臺(tái)雙輥壓榨洗漿機(jī)銷(xiāo)往印尼市場(chǎng)和印度市場(chǎng)，占企業(yè)出口產(chǎn)品份額的80%以上。在印尼OKI年產(chǎn)280萬(wàn)噸闊葉木化學(xué)漿項(xiàng)目中，配套了18臺(tái)SJA2284（輥徑￠2200mm，輥?zhàn)娱L(zhǎng)度8400mm）雙輥壓榨洗漿機(jī)，單機(jī)產(chǎn)能可達(dá)4500噸/d，一次性投運(yùn)成功。

實(shí)踐證明，雙輥壓榨洗漿機(jī)已是目前大規(guī)模洗漂項(xiàng)目首選的洗滌設(shè)備，標(biāo)志著中國(guó)洗漿設(shè)備已邁入世界高端制漿裝備業(yè)的行列，具備了國(guó)際市場(chǎng)競(jìng)爭(zhēng)力，具有良好的發(fā)展前景。

Wenrui continues to push international development strategy and expand overseas market. Presently over 30 sets of twin roll wash press are in operation in Indonesia and India market, with over 80% share of products exported. 18 sets of SJA2284 (roll dia. 2200mm, roll width 8400mm) were delivered to a 2.8 million t/a hardwood pulping line in OKI Pulp & Paper, Indonesia, with single machine production capacity reaching 4500t/d, and successfully started up at one trial. It’s proved that twin roll wash press can be a good choice for large-capacity pulping project. China homebred pulping equipment has gradually entered high-end market in the globe.

責(zé)任編輯：葛鴻燕

校對(duì)：葛鴻燕