CN103088689B - Zero discharging and recycling technology for waste paper or raw stock board papermaking wastewater - Google Patents
Zero discharging and recycling technology for waste paper or raw stock board papermaking wastewater Download PDFInfo
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- 239000002351 wastewater Substances 0.000 title claims abstract description 358
- 238000004064 recycling Methods 0.000 title claims abstract description 25
- 239000010893 paper waste Substances 0.000 title claims abstract description 19
- 238000007599 discharging Methods 0.000 title 1
- 238000005516 engineering process Methods 0.000 title 1
- 238000004140 cleaning Methods 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000012216 screening Methods 0.000 claims abstract description 28
- 238000003825 pressing Methods 0.000 claims abstract description 18
- 238000004537 pulping Methods 0.000 claims abstract description 18
- 238000005273 aeration Methods 0.000 claims abstract description 15
- 238000010790 dilution Methods 0.000 claims abstract description 15
- 239000012895 dilution Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 39
- 239000013049 sediment Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract 1
- 239000000123 paper Substances 0.000 description 37
- 238000004519 manufacturing process Methods 0.000 description 18
- 239000002781 deodorant agent Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000002386 air freshener Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Abstract
一种废纸或原浆板造纸废水零排放回用工艺。纸页成型废水经成型废水池通过废水输送构件（1）进入总废水收集池，纸浆筛选废水经筛选废水池通过废水输送构件进入总废水收集池，纸页压榨废水经压榨废水池通过废水输送构件进入总废水收集池，毛毯清洗废水经压榨废水池通过废水输送构件进入总废水收集池，碎浆废水经碎浆废水池通过废水输送构件进入总废水收集池；使用第一废水回用泵（3）将总废水收集池废水回用于碎浆机；成型废水池部分废水回用于纸浆的稀释，筛选废水池部分废水回用于碎浆机，使用第一废水回用泵（6）将压榨废水池部分废水回用于造纸毛毯清洗，有曝气装置（4），具有废水零排放全部回用、可降低造价和减少运行费用等特点。
A zero-discharge recycling process for waste paper or pulp board papermaking wastewater. Paper forming wastewater enters the total wastewater collection tank through the forming wastewater tank through the wastewater conveying component (1), pulp screening wastewater enters the total wastewater collecting tank through the screening wastewater tank through the wastewater conveying component, and paper pressing wastewater passes through the pressing wastewater tank through the wastewater conveying component Enter the total waste water collection pool, the blanket cleaning waste water enters the total waste water collection pool through the waste water conveying component through the press waste water pool, and the pulping waste water enters the total waste water collection pool through the pulp waste water pool through the waste water transport component; use the first waste water recycling pump (3 ) to reuse the wastewater from the total wastewater collection tank for the pulper; reuse part of the wastewater from the forming wastewater tank for pulp dilution, and reuse part of the wastewater from the screening wastewater tank for the pulper, and use the first wastewater recycling pump (6) to squeeze Part of the waste water in the waste water pool is reused for cleaning papermaking blankets, and there is an aeration device (4), which has the characteristics of zero discharge and full reuse of waste water, which can reduce construction costs and reduce operating costs.
Description
技术领域 technical field
本发明涉及废纸造纸废水零排放回用工艺，具体是一种废纸或原浆板生产鞭炮、花炮及引线等用纸的废水零排放回用工艺，也可适用于废纸或原浆板生产瓦楞纸、黄板纸、牛皮纸等造纸废水零排放回用工艺。 The invention relates to a zero-discharge recycling process for waste paper and papermaking wastewater, in particular to a zero-discharge recycling process for waste paper or raw pulp boards for producing firecrackers, firecrackers and lead wires, etc., and can also be applied to waste paper or raw pulp boards Production of corrugated paper, yellow cardboard, kraft paper and other papermaking wastewater zero discharge recycling process.
背景技术 Background technique
废纸造纸废水包括碎浆废水、纸浆筛选废水、纸机作业废水，纸机作业废水也称纸机废水，纸机废水包括纸页成型废水、压榨废水，还有清洗毛毯的清洗废水。目前处理废纸造纸废水的处理工艺，在加药采用气浮法，或通过沉淀处理后，再通过生化处理，使出水质量达到规定的排放标准后向外排放。 Waste paper papermaking wastewater includes pulping wastewater, pulp screening wastewater, paper machine operation wastewater, paper machine operation wastewater is also called paper machine wastewater, paper machine wastewater includes paper forming wastewater, press wastewater, and cleaning wastewater for cleaning felts. The current treatment process for treating waste paper and papermaking wastewater uses air flotation method after dosing, or after sedimentation treatment, and then through biochemical treatment, so that the quality of the effluent reaches the specified discharge standard and then discharged to the outside.
申请号为200810171975.5的专利文献公告了一种“造纸废水零排放工艺”，该工艺为车间内纸机废水（也称“白水”）的短循环使用系统，包括：纸机废水分流为浓白水和稀白水，浓白水进入浓白水池后部分回用于配浆，稀白水进入稀白水池，多余的浓白水和全部的稀白水使用变频泵送入白水回收器，白水回收器包括缓冲池和中心配水箱，经白水回收器处理后，上层清水进入无阀滤池，过滤后的水供生产回用，下部废水及污泥进入辐流沉淀池处理，经处理后的清水供回用，滤渣被制成渣饼，用于生产包装纸原料。该“造纸废水零排放工艺”涉及纸机废水处理回用的过程包括浓白水与稀白水的分离，多余部分的浓白水和稀白水的回用需经过缓冲池与中心配水箱处理、无阀滤池过滤、辐流沉淀池沉淀工序，其回用处理的工序多，所涉及的单元设施多，制造成本较高，且只涉及造纸废水中的纸机废水处理与回用，而且，对所产生的沉淀物污泥需经过将滤渣制成渣饼的工序，其处理工艺不能直接将沉淀物回用于生产。 The patent literature with the application number 200810171975.5 announced a "papermaking wastewater zero discharge process", which is a short-cycle system for paper machine wastewater (also known as "white water") in the workshop, including: paper machine wastewater is divided into concentrated white water and Thin white water, after the concentrated white water enters the concentrated white water tank, part of it is reused for pulp mixing, and the thin white water enters the thin white water tank, and the excess concentrated white water and all the thin white water are sent to the white water recovery device by frequency conversion pump, and the white water recovery device includes a buffer tank and a center After the water distribution tank is treated by the white water recycler, the upper layer of clean water enters the valveless filter tank, and the filtered water is used for production reuse, while the lower part of the wastewater and sludge enters the radial flow sedimentation tank for treatment, and the treated clean water is used for reuse, and the filter residue is Made into slag cake for the production of packaging paper raw materials. The "zero discharge process of papermaking wastewater" involves the process of paper machine wastewater treatment and reuse, including the separation of concentrated white water and dilute white water. Pool filtration and radial flow sedimentation tank sedimentation process have many recycling processes, involve many unit facilities, and have high manufacturing costs, and only involve paper machine wastewater treatment and reuse in papermaking wastewater. The sediment sludge needs to go through the process of making the filter residue into a slag cake, and the treatment process cannot directly reuse the sediment for production.
发明内容 Contents of the invention
本发明目的是提供废纸或原浆板造纸废水零排放回用装置，对使用废纸或原浆板生产鞭炮、花炮等用纸的造纸废水实现零排放并全部回用，并对所产生的沉淀物直接回用于生产，废水回用的工序及构件少、过程简单。 The purpose of the present invention is to provide a zero-discharge recycling device for waste paper or raw pulp board papermaking wastewater, to realize zero discharge and full reuse of papermaking wastewater using waste paper or raw pulp board to produce firecrackers, firecrackers and other papers, and to recycle all the produced wastewater The sediment is directly reused in production, and the wastewater reuse process and components are few and the process is simple.
本发明的技术方案参见图1： Technical scheme of the present invention is referring to Fig. 1:
设有总废水收集池和废水输送构件1； There is a total waste water collection tank and a waste water conveying component 1;
纸浆筛选产生的筛选废水，通过废水输送构件1进入总废水收集池； The screened waste water produced by pulp screening enters the total waste water collection pool through the waste water conveying member 1;
纸页成型产生的成型废水，通过废水输送构件1进入总废水收集池； Forming waste water generated by paper sheet forming enters the total waste water collection pool through the waste water conveying member 1;
纸页压榨产生的压榨废水，通过废水输送构件1进入总废水收集池； Press waste water produced by paper sheet pressing enters the total waste water collection pool through the waste water conveying member 1;
清洗造纸毛毯2产生的清洗废水通过输送构件1进入总废水收集池； The cleaning wastewater generated by cleaning the papermaking felt 2 enters the total wastewater collection tank through the conveying member 1;
碎浆机产生的碎浆废水，通过废水输送构件1进入总废水收集池； The pulping wastewater generated by the pulper enters the total wastewater collection tank through the wastewater conveying member 1;
设有第一废水回用泵3，使用第一废水回用泵3及与该泵出水端连接的回用管道3a将总废水收集池的废水直接回用于碎浆机。 A first wastewater recycling pump 3 is provided, and the wastewater from the total wastewater collection tank is directly recycled to the pulper by using the first wastewater recycling pump 3 and the recycling pipeline 3a connected to the pump outlet.
进一步的是，参见图2： Further, see Figure 2:
设有成型废水池，纸页成型产生的成型废水经成型废水池，再通过所述的废水输送构件1进入总废水收集池； A forming waste water pool is provided, and the forming waste water generated by paper sheet forming passes through the forming waste water pool, and then enters the total waste water collection pool through the waste water conveying member 1;
设有筛选废水池，纸浆筛选产生的筛选废水经筛选废水池，再通过所述的废水输送构件1进入总废水收集池； A screening waste water pool is provided, and the screening waste water produced by pulp screening passes through the screening waste water pool, and then enters the total waste water collection pool through the waste water conveying member 1;
设有压榨废水池，纸页压榨产生的压榨废水经压榨废水池，再通过所述的废水输送构件1进入总废水收集池； A press waste water pool is provided, and the press waste water produced by paper sheet pressing passes through the press waste water pool, and then enters the total waste water collection pool through the waste water conveying member 1;
清洗造纸毛毯2的清洗废水经压榨废水池，再通过所述的废水输送构件1进入总废水收集池； The cleaning wastewater for cleaning the papermaking felt 2 passes through the squeeze wastewater tank, and then enters the total wastewater collection tank through the wastewater conveying member 1;
设有碎浆废水池，碎浆机产生的碎浆废水经碎浆废水池，再通过所述的废水输送构件1进入总废水收集池。 A pulping wastewater tank is provided, and the pulping wastewater generated by the pulper passes through the pulping wastewater tank, and then enters the total wastewater collection tank through the wastewater conveying member 1 .
设有作用于总废水收集池内的曝气装置4，曝气装置运行中，使总废水收集池内的沉淀物悬浮，以利于沉淀物随废水的回用而直接回用于生产纸品。 An aeration device 4 acting on the total wastewater collection tank is provided. During the operation of the aeration device, the sediment in the total wastewater collection tank is suspended, so that the sediment can be directly reused for the production of paper products along with the reuse of wastewater.
本发明的第一步即是将各废水产生点所产生的废水通过输送构件1进入总废水收集池，或者是首先进入相应的废水池，然后再通过所述的废水输送构件1进入总废水收集池；第二步是使用第一废水回用泵3并通过相应的回用管道3a将总废水收集池的废水直接回用于邻近设置的碎浆机，通过对废水的全部回用，实现废水零排放。 The first step of the present invention is that the waste water produced by each waste water production point enters the total waste water collection pool through the conveying member 1, or firstly enters the corresponding waste water pool, and then enters the total waste water collection pool through the waste water conveying member 1 pool; the second step is to use the first waste water reuse pump 3 and directly recycle the waste water in the total waste water collection pool to the adjacent pulper through the corresponding reuse pipeline 3a, and realize waste water recovery through all the reuse of waste water. zero emission.
而且，参见2： And, see 2:
成型废水池设有第一废水出口，成型废水池的废水出水口与纸浆稀释池相通，即将成型废水池的部分废水直接回用于纸浆的稀释； The forming waste water tank is provided with a first waste water outlet, and the waste water outlet of the forming waste water tank is connected to the pulp dilution tank, and part of the waste water in the forming waste water tank is directly reused for pulp dilution;
筛选废水池设有第二废水出口，并通过输送管道5将筛选废水池的部分废水直接回用于碎浆机； The screening waste water tank is provided with a second waste water outlet, and part of the waste water in the screening waste water tank is directly returned to the pulper through the delivery pipeline 5;
设有第二废水回用泵6，使用第二废水回用泵6及与该泵出水端连接回水管6a将压榨废水池的部分废水直接回用于造纸毛毯2的清洗。 A second waste water reuse pump 6 is provided, and part of the waste water from the pressing waste water pool is directly reused for cleaning the papermaking felt 2 by using the second waste water reuse pump 6 and the return pipe 6a connected to the pump outlet.
在上述废水直接回用的同时，各废水池内的沉淀物和悬浮物随废水直接回用而回用于相应的各生产工序。 While the above-mentioned waste water is directly reused, the sediment and suspended matter in each waste water pool are reused in corresponding production processes along with the direct waste water reuse.
本发明作业时，对进入碎浆机之前的原材料，首先经过人工精细挑选工序，有效去除原材料中各类大小不一及肉眼可见的杂物。本发明基于鞭炮、花炮及同类用纸的纸质要求不同于书写用纸的特点，在废水回用过程中，使各废水池内的沉淀物和悬浮物随废水的回用而回用于纸品生产，且满足生产鞭炮、花炮等同类用纸的纸质要求。本发明在内部实际生产的纸张产品，已应用于鞭炮、花炮等生产，均满足生产及产品使用性能的要求。 When the present invention works, the raw materials before entering the pulper are manually finely selected to effectively remove all kinds of sundries of different sizes and visible to the naked eye. The present invention is based on the characteristics of firecrackers, firecrackers and similar papers that are different from writing paper. During the process of waste water reuse, the sediment and suspended matter in each waste water pool can be reused for paper products along with the waste water reuse. Production, and meet the paper quality requirements for the production of firecrackers, firecrackers and other similar paper. The paper products actually produced in-house by the present invention have been applied to the production of firecrackers, firecrackers, etc., and all meet the requirements of production and product performance.
本发明具有的技术效果是： The technical effect that the present invention has is:
1、由于本发明将各废水产生点所产生的废水通过废水输送构件1进入总废水收集池，针对鞭炮、花炮等同类用纸的纸质要求不同于书写用纸的特点，将总废水收集池的废水直接回用于碎浆机，同时，可将成型废水池的部分废水直接回用于纸浆稀释池对纸浆进行稀释，可将筛选废水池的部分废水直接回用于碎浆机，可将压榨废水池的部分废水直接回用于毛毯清洗，使得废纸造纸过程中产生的全部废水可得到回用，实现废水零排放，避免对环境产生污染，有利于环境保护。 1, because the present invention enters the total waste water collection tank through the waste water produced by each waste water production point through the waste water delivery member 1, the paper quality requirements for similar papers such as firecrackers and firecrackers are different from the characteristics of writing paper, the total waste water collection tank The wastewater can be directly recycled to the pulper. At the same time, part of the wastewater from the forming wastewater tank can be directly recycled to the pulp dilution tank to dilute the pulp. Part of the wastewater from the screening wastewater tank can be directly recycled to the pulper. Part of the waste water from the pressing waste water pool is directly reused for blanket cleaning, so that all the waste water generated in the papermaking process of waste paper can be reused, realizing zero discharge of waste water, avoiding pollution to the environment, and is conducive to environmental protection.
2、针对鞭炮、花炮等同类用纸的纸质要求不同于书写用纸的特点，本发明可实现将各废水池内的沉淀物和悬浮物随废水的回用而回用于纸品的生产，在内部范围使用本发明生产的纸张产品，经实际应用，满足鞭炮、花炮等用纸的生产及使用性能要求，因此，本发明不但可充分利用原材料，节约用材，而且可避免沉淀物形成污泥产生二次污染； 2. In view of the different paper quality requirements of firecrackers, firecrackers and other similar papers, which are different from the characteristics of writing paper, the present invention can realize the reuse of sediment and suspended matter in each waste water pool for the production of paper products along with the reuse of waste water, The paper products produced by the present invention are used in the internal range to meet the production and performance requirements of paper for firecrackers and firecrackers. Therefore, the present invention can not only make full use of raw materials, save materials, but also avoid the formation of sludge from sediments. produce secondary pollution;
3、由于部分废水直接由相应的废水池输送至临近的工序回用，且总废水收集池的废水回用于临近设置的碎浆机，因此，废水回用路径短，废水回用过程所涉及的设施或构件少，结构简单，可明显降低制造成本和减少运行成本。 3. Since part of the wastewater is directly transported from the corresponding wastewater tank to the adjacent process for reuse, and the wastewater in the total wastewater collection tank is reused for the nearby pulper, therefore, the wastewater reuse path is short, and the wastewater reuse process involves There are few facilities or components, and the structure is simple, which can significantly reduce manufacturing costs and reduce operating costs.
4、由于本发明可实现废纸造纸过程中所有废水的回用，仅在造纸毛毯清洗工序补充少量的新水，可减少新水耗量、减少水资源的消耗、降低运行费用。 4. Since the present invention can realize the reuse of all waste water in the papermaking process of waste paper, only a small amount of new water is added in the papermaking felt cleaning process, which can reduce the consumption of new water, reduce the consumption of water resources, and reduce operating costs.
本发明所具有的其他技术效果将在具体实施方式中进一步描述。 Other technical effects of the present invention will be further described in specific embodiments.
附图说明 Description of drawings
图1为本发明工艺方案的示意图； Fig. 1 is the schematic diagram of technological scheme of the present invention;
图2为本发明实施例的示意图，确定该图为摘要附图； Fig. 2 is a schematic diagram of an embodiment of the present invention, and it is determined that this figure is an abstract accompanying drawing;
图3为成型废水池与纸浆稀释池的立面结构示意图，展示了成型废水池的废水出口7与纸浆稀释池的连通结构； Figure 3 is a schematic diagram of the facade structure of the forming waste water tank and the pulp dilution tank, showing the connection structure between the waste water outlet 7 of the forming waste water tank and the pulp dilution tank;
图4为压榨废水池部位的立面结构示意图，展示了压榨废水池内废水直接回用于清洗造纸毛毯2的示意结构。 Fig. 4 is a schematic diagram of the facade structure of the press waste water tank, showing a schematic structure in which the waste water in the press waste water tank is directly reused for cleaning the papermaking felt 2.
具体实施方式 Detailed ways
参见附图1，设有总废水收集池和废水输送构件1（如管道或其它结构形式的输送构件）；碎浆机产生的碎浆废水，通过废水输送构件1进入总废水收集池；纸浆筛选产生的浆筛废水，通过废水输送构件1进入总废水收集池；纸页成型产生的成型废水，通过废水输送构件1进入总废水收集池；纸页压榨产生的压榨废水，通过废水输送构件1进入总废水收集池；清洗造纸毛毯2产生的清洗废水通过输送构件1进入总废水收集池；设有第一废水回用泵3，使用第一废水回用泵3及与该泵出水端连接的回用管道3a将总废水收集池的废水直接回用于碎浆机； Referring to accompanying drawing 1, there is a total waste water collection tank and a waste water delivery member 1 (such as a pipe or other structural form of delivery member); the pulping wastewater produced by the pulper enters the total waste water collection tank through the waste water delivery member 1; pulp screening The generated pulp screen wastewater enters the total wastewater collection tank through the wastewater conveying component 1; the molding wastewater generated by paper sheet forming enters the total wastewater collection tank through the wastewater conveying component 1; the pressing wastewater generated by paper pressing enters through the wastewater conveying component 1 The total waste water collection tank; the cleaning waste water produced by cleaning the papermaking felt 2 enters the total waste water collection tank through the conveying member 1; the first waste water reuse pump 3 is provided, and the first waste water reuse pump 3 and the return water connected to the pump outlet are used Use the pipeline 3a to directly return the waste water in the total waste water collection tank to the pulper;
参见图2，在上述所述方案的基础上，设置碎浆废水池，碎浆废水池的排出口与废水输送构件1连通，碎浆机产生的碎浆废水首先进入碎浆废水池，再通过废水输送构件1进入总废水收集池；设置筛选废水池，筛选废水池的排出口与废水输送构件1连通，纸浆筛选产生的筛选废水首先进入筛选废水池，再通过废水输送构件1进入总废水收集池；设置成型废水池，成型废水池的排出口与废水输送构件1连通，纸页成型产生的成型废水首先进入成型废水池，再通过废水输送构件1进入总废水收集池；设置压榨废水池，压榨废水池的排出口与废水输送构件1连通，纸页压榨产生的压榨废水首先进入压榨废水池，再通过废水输送构件1进入总废水收集池；清洗造纸毛毯2产生的清洗废水进入总废水收集池有两种方式，优选进入压榨废水池，再通过废水输送构件1进入总废水收集池，也可由单独设置的清洗废水池进入总废水收集池。 Referring to Fig. 2, on the basis of the above-mentioned scheme, a pulping waste water tank is set, and the outlet of the pulping waste water tank is communicated with the waste water conveying member 1, and the pulping waste water produced by the pulper first enters the pulping waste water tank, and then passes through the pulping waste water tank. The waste water conveying component 1 enters the total waste water collection pool; a screening waste water pool is set up, and the outlet of the screening waste water pool is connected with the waste water transporting component 1, and the screened waste water generated by pulp screening first enters the screening waste water pool, and then enters the total waste water collection through the waste water transporting component 1 pool; a forming waste water pool is set, and the outlet of the forming waste water pool is connected with the waste water conveying member 1, and the forming waste water generated by paper sheet forming first enters the forming waste water pool, and then enters the total waste water collection pool through the waste water conveying member 1; the pressing waste water pool is set, The outlet of the press waste water pool is connected with the waste water conveying component 1, and the press waste water generated by paper sheet pressing first enters the press waste water pool, and then enters the total waste water collection pool through the waste water transport component 1; the cleaning waste water generated by cleaning the papermaking felt 2 enters the general waste water collection There are two ways for the pool, preferably to enter the press waste water pool, and then enter the total waste water collection pool through the waste water conveying member 1, or enter the total waste water collection pool from a separate cleaning waste water pool.
所述碎浆废水池、筛选废水池、成型废水池、压榨废水池的废水进入总废水收集池有两种形式，当所述废水池的底部标高高于总废水收集池时，则通过所述废水输送构件1使池内废水与沉淀物成自流状态流入总废水收集池，当所述废水池的底部标高低于总废水收集池时，则可采用泵及所述废水输送构件1将废水池内废水与沉淀物送入总废水收集池。 There are two forms for the waste water from the pulping waste water tank, screening waste water tank, forming waste water tank and pressing waste water tank to enter the total waste water collection tank. When the bottom elevation of the waste water tank is higher than the total waste water collection tank, the The waste water conveying member 1 makes the waste water and the sediment in the pond flow into the total waste water collection pond in an artesian state, and when the bottom elevation of the waste water pond is lower than the total waste water collection pond, then the pump and the waste water conveying member 1 can be used to transport the waste water in the waste water pond And the sediment is sent to the total waste water collection tank.
所述碎浆废水池、筛选废水池、成型废水池、压榨废水池的设置方式不是唯一的，根据生产设备布置情况，相邻的可合并为一个。 The arrangement of the pulping waste water pool, screening waste water pool, forming waste water pool and pressing waste water pool is not unique, and adjacent ones can be combined into one according to the arrangement of production equipment.
参见图2，成型废水池设有第一废水出口，成型废水池的废水出水口与纸浆稀释池相通，即将成型废水池的部分废水直接回用于纸浆的稀释；如图所示，成型废水池的一侧壁下部设有所述的第一废水出口7，第一废水出口7与纸浆稀释池的下部相通，成型废水池的另一侧壁上部设有可对纸浆稀释池内的纸浆液面高度起控制作用的排出口8，当成型废水池的水位高于纸浆稀释池内的纸浆液面时，废水则由所述的排出口8流入废水输送构件1而进入总废水收集池，所述成型废水池的排出口8位于其侧壁上的适宜高度，可通过对纸浆稀释池的容积与所需回用的废水量而确定，所述排出口8位于侧壁上的适宜高度，有利于稳定纸浆的稀释浓度及稳定纸张的质量。 Referring to Fig. 2, the forming waste water tank is provided with a first waste water outlet, and the waste water outlet of the forming waste water tank communicates with the pulp dilution tank, and part of the waste water in the forming waste water tank is directly reused for pulp dilution; as shown in the figure, the forming waste water tank The lower part of the side wall of the forming waste water tank is provided with the first waste water outlet 7, and the first waste water outlet 7 communicates with the bottom of the pulp dilution tank. The discharge port 8 that plays a controlling role, when the water level of the forming waste water tank is higher than the pulp liquid level in the pulp dilution tank, the waste water flows into the waste water conveying member 1 from the discharge port 8 and enters the total waste water collection tank, the forming waste water The discharge outlet 8 of the pool is located at a suitable height on its side wall, which can be determined by the volume of the pulp dilution tank and the amount of waste water required to be reused. The discharge port 8 is located at a suitable height on the side wall, which is conducive to stabilizing the pulp The dilution concentration and stable paper quality.
筛选废水池设有第二废水出口，并通过输送管道5将筛选废水池的部分废水直接回用于碎浆机，当筛选废水池底部标高高于碎浆机时，则通过输送管道5使池内废水与沉淀物成自流状态回用于碎浆机，当筛选废水池底部标高低于碎浆机时，则可采用泵及通过输送管道5将池内废水与沉淀物送入碎浆机。 The screening waste water tank is provided with a second waste water outlet, and part of the waste water in the screening waste water tank is directly returned to the pulper through the delivery pipeline 5. The waste water and sediment are returned to the pulper in a self-flowing state. When the bottom elevation of the screened waste water tank is lower than the pulper, the waste water and sediment in the pool can be sent to the pulper through the pump and the delivery pipeline 5.
设有第二废水回用泵6，使用第二废水回用泵6及与该泵出水端连接回水管6a将压榨废水池的部分废水直接回用于造纸毛毯2的清洗。 A second waste water reuse pump 6 is provided, and part of the waste water from the pressing waste water pool is directly reused for cleaning the papermaking felt 2 by using the second waste water reuse pump 6 and the return pipe 6a connected to the pump outlet.
图4为压榨废水池部位的立面结构示意图，同时展示了毛毯清洗构件9的示意结构，毛毯清洗构件9与回水管6a的出水端连接，所述毛毯清洗构件9为水平状上下横管的“U”形结构，造纸毛毯2被清洗部位位于上下横管的“U”形结构内，所述“U”结构的上下横管上设有若干朝向造纸毛毯的喷水口；所述毛毯清洗构件9优选位于压榨废水池的上方，一是可减少回用水管6a的长度以缩短废水回用的路径，二是可使清洗造纸毛毯产生的清洗废水直接落入压榨废水池内。 Fig. 4 is a schematic diagram of the facade structure of the press wastewater pool, and simultaneously shows the schematic structure of the felt cleaning member 9. The felt cleaning member 9 is connected to the water outlet end of the return pipe 6a, and the felt cleaning member 9 is a horizontal horizontal tube. "U"-shaped structure, the cleaned part of the paper-making felt 2 is located in the "U"-shaped structure of the upper and lower horizontal tubes, and the upper and lower horizontal tubes of the "U" structure are provided with a number of water jets facing the paper-making felt; the felt cleaning The component 9 is preferably located above the press waste water tank. Firstly, the length of the reuse water pipe 6a can be reduced to shorten the path of waste water reuse, and secondly, the cleaning waste water produced by cleaning the papermaking felt can be directly dropped into the press waste water tank.
设有新水补充水管10，新水补充水管10上设有控制阀10a，新水补充水管10与毛毯清洗构件9连通，当需要使用新水清洗造纸毛毯或需补充新水时，则开启控制阀10a，当压榨废水池内的废水能够满足清洗造纸毛毯的要求时，则关闭控制阀10a，而直接回用压榨废水池内的废水清洗。 A new water supply pipe 10 is provided, and a control valve 10a is arranged on the new water supply pipe 10. The new water supply pipe 10 communicates with the blanket cleaning member 9. When it is necessary to use new water to clean the papermaking felt or to replenish new water, the control valve 10a is opened. Valve 10a, when the waste water in the pressing waste water tank can meet the requirements for cleaning the papermaking felt, close the control valve 10a, and directly reuse the waste water in the pressing waste water tank for cleaning.
设有作用于总废水收集池内的曝气装置4，曝气装置4包括气体发生器4a和位于总废水收集池内的曝气构件4b，曝气构件4b优选采用圆管，圆管上设有若干曝气孔，气体发生器4a优选采用罗茨鼓风机，曝气构件4b的布置及结构形式有多种，图2中展示了其中的一种结构形式。 An aeration device 4 acting on the total wastewater collection tank is provided. The aeration device 4 includes a gas generator 4a and an aeration component 4b located in the total wastewater collection tank. The aeration component 4b preferably adopts a circular tube, and the circular tube is provided with several For the aeration hole, the gas generator 4a is preferably a Roots blower, and there are various arrangements and structural forms of the aeration member 4b, one of which is shown in FIG. 2 .
在使用本发明正常作业期间，废水处于正常的流动状态，依据“流水不腐”的原理，废水不容易产生异气，必要时可喷洒除臭剂。当作业停滞较长时间（两日或三日以上）时，宜向总废水收集池内喷洒除臭剂，并曝气，同时向其它废水池内喷洒除臭剂，除臭剂可采用现有的除臭剂，也可采用以70%的消毒剂和30%的空气清新剂经高度均匀后，按1:300的比例加入新水，向废水池内喷射。 During the normal operation of the present invention, the waste water is in a normal flow state. According to the principle of "flowing water does not rot", the waste water is not easy to generate abnormal gas, and deodorant can be sprayed when necessary. When the operation is stagnant for a long time (two or three days or more), it is advisable to spray deodorant into the total wastewater collection pool and aerate it, and spray deodorant into other wastewater pools at the same time. The deodorant can use the existing deodorant The odor agent can also be used. After the 70% disinfectant and 30% air freshener are highly uniform, add new water at a ratio of 1:300 and spray it into the waste water pool.
本发明说明书所描述的实施方式和在本发明技术方案基础上的任何变形方式均属于本发明的保护范围。 The embodiments described in the description of the present invention and any deformations based on the technical solution of the present invention belong to the protection scope of the present invention.
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