WO2021208394A1 - Slurry purifying and water collecting system and method based on filter cloth dehydrator - Google Patents
Slurry purifying and water collecting system and method based on filter cloth dehydrator Download PDFInfo
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- WO2021208394A1 WO2021208394A1 PCT/CN2020/122575 CN2020122575W WO2021208394A1 WO 2021208394 A1 WO2021208394 A1 WO 2021208394A1 CN 2020122575 W CN2020122575 W CN 2020122575W WO 2021208394 A1 WO2021208394 A1 WO 2021208394A1
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- gypsum
- filter cloth
- water
- filtrate
- vacuum box
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/04—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/02—Methods and apparatus for dehydrating gypsum
Definitions
- the invention belongs to the technical field of energy saving and environmental protection, and relates to a slurry purification water collection system and method based on a filter cloth dehydrator.
- the desulfurization system of the unit may have a problem of poor water balance, that is, the amount of water substituted into the system is greater than the system evaporation, which affects the normal flushing of the demister, and long-term operation may cause the demister to occur Scaling or even clogging and collapse will affect the safety of the unit operation; in addition, the desulfurization system may cause deterioration of the absorption tower slurry due to poor water quality or long-term abnormal operation, resulting in a large amount of slurry that needs to be replaced or discarded. There are many impurities, cannot be reused, and the disposal is difficult, which brings great processing difficulty to power production.
- the existing solid-liquid separation equipment of vacuum belt dehydrator is mainly used for the dehydration of large-particle gypsum. Its device has poor applicability to low-density gypsum slurry, is prone to clogging, and has low filtration accuracy. Extraction of clean water from density gypsum slurry.
- the purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and provide a slurry purification and water collection system and method based on a filter cloth dewatering machine.
- the system and method can satisfy the normal gypsum removal effect while achieving filtrate water Solid-liquid separation of low-density slurry.
- the slurry purification water collection system based on the filter cloth dehydrator of the present invention includes a filter cloth dehydrator, a vacuum box, a gypsum cyclone, a filter buffer tank and a flushing water tank;
- the filter cloth dehydrator includes a filter cloth and two belt shafts.
- the filter cloth has a ring structure.
- the filter cloth bypasses the two belt shafts.
- the two belt shafts are divided into a gypsum dehydration area, a filtrate dehydration area, and Gypsum washing area, gypsum dehydration area, filtrate dehydration area and gypsum washing area are distributed in order along the movement direction of the upper filter cloth.
- the vacuum box is located between the two belt shafts.
- the filter cloth surrounds the vacuum box and the top of the vacuum box. The opening is in contact with the bottom of the upper part of the filter cloth.
- Gypsum water nozzles are set in the gypsum dehydration area, filtrate nozzles are set in the filtrate dehydration area, and flushing nozzles are set in the gypsum washing area.
- gypsum water nozzles and filter The liquid nozzle and the flushing nozzle are located above the filter cloth, the gypsum cyclone is connected to the inlet of the gypsum water nozzle, the outlet of the filtrate buffer tank is connected with the inlet of the filtrate nozzle, and the outlet of the flushing water tank is connected with the inlet of the flushing water nozzle.
- It also includes a gypsum storehouse for collecting gypsum on the filter cloth, wherein the gypsum storehouse is located under the filter cloth dehydrator.
- It also includes a vacuum pump, a steam-water separator and a water recycling tank.
- the inlet of the steam-water separator is connected with the bottom outlet of the vacuum box, the liquid outlet of the steam-water separator is connected with the water recycling tank, and the gas outlet of the steam-water separator is connected to the vacuum pump.
- the entrance is connected.
- the slurry purification and water collection method based on the filter cloth dehydrator of the present invention includes the following steps:
- the gypsum water output by the gypsum cyclone is sprayed onto the filter cloth through the gypsum water nozzle.
- the water in the gypsum water is filtered by the filter cloth and enters the vacuum box.
- the gypsum water adheres to the filter cloth, thereby forming a porous gypsum layer on the filter cloth.
- the gypsum layer enters the filter dehydration area with the filter cloth driven by the belt shaft, and the filtrate output from the filtrate buffer tank is filtered through the filtrate.
- the nozzle is sprayed onto the gypsum layer, and then under the suction of the vacuum box, the filtrate is filtered through the gypsum layer and the filter cloth and then enters the vacuum box.
- most of the particles in the filtrate are attached to the surface of the gypsum layer or gypsum.
- the remaining particles are attached to the surface of the filter cloth to realize the solid-liquid separation of the filtrate;
- the gypsum layer follows the filter cloth into the gypsum washing area, and at the same time, the flushing water output from the washing water tank is sprayed onto the gypsum layer through the washing water nozzle to reduce the chloride ion concentration in the gypsum.
- Part of the spray water is pumped by the vacuum box. It enters into the vacuum box under the action of suction, and the remaining spray water and gypsum layer continue to advance with the filter cloth, peel off when the filter cloth bends downwards and fall into the gypsum storage under the action of gravity.
- the travel distance of gypsum slurry in the gypsum dehydration area is 4m-6m.
- the travel distance of the gypsum layer in the filtrate dehydration area is 6m-8m.
- the present invention has the following beneficial effects:
- the slurry purification and water collection system and method based on the filter cloth dehydrator of the present invention first spray gypsum water on the filter cloth during specific operation, and form a layer on the filter cloth under the action of the vacuum box suction
- the porous gypsum layer and then spray the filtrate on the gypsum layer, and under the action of the vacuum box suction, the filtrate is filtered through the gypsum layer, and then the filtrate is filtered through the filter cloth to achieve the filtrate.
- Solid-liquid separation of water and low-density slurry so as to achieve the solid-liquid separation of filtrate water and low-density slurry while satisfying the normal gypsum removal effect.
- the present invention Compared with the traditional vacuum belt dehydrator, the present invention has more functions , It has the functions of treating filtrate water, low-concentration gypsum slurry, deteriorated slurry and wastewater.
- the in-depth treatment significance of the present invention is also that through the dual filtration effect of the gypsum layer and the filter cloth, the solid content in the filtrate water can be reduced to the required range of process water, which can meet the alternative use of mist eliminator washing or process water pulping, and achieve optimized desulfurization.
- Figure 1 is a schematic diagram of the present invention.
- 1 is a gypsum cyclone
- 2 is a filtrate buffer tank
- 3 is a flushing water tank
- 4 is a vacuum tank
- 5 is a belt shaft
- 6 is a vacuum pump
- 7 is a steam separator
- 8 is a gypsum storehouse
- 9 is a filter cloth
- the dehydrator, 10 is a gypsum dehydration area
- 11 is a filtrate dehydration area
- 12 is a gypsum washing area
- 13 is a water recycling tank.
- a layer/element when referred to as being "on" another layer/element, the layer/element may be directly on the other layer/element, or there may be an intermediate layer/element between them. element.
- the layer/element may be located "under” the other layer/element when the orientation is reversed.
- the slurry purification water collection system based on the filter cloth dehydrator of the present invention includes a filter cloth dehydrator 9, a vacuum box 4, a gypsum cyclone 1, a filter buffer tank 2 and a washing water tank 3;
- the cloth dewatering machine 9 includes a filter cloth and two belt shafts 5, the filter cloth has a ring structure, in which the filter cloth bypasses the two belt shafts 5, and the two belt shafts 5 are divided into a gypsum dehydration area 10 and filter liquid dehydration Area 11 and gypsum washing area 12, gypsum dehydration area 10, filtrate dehydration area 11 and gypsum washing area 12 are distributed in sequence along the movement direction of the upper filter cloth.
- the vacuum box 4 is located between the two belt shafts 5, and the filter cloth surrounds the vacuum.
- gypsum water nozzles are set in the gypsum dehydration area 10
- filtrate nozzles are set in the filtrate dehydration area 11, and the gypsum washing area
- flushing nozzles in 12 among which the gypsum water nozzle, the filtrate nozzle and the flushing nozzle are all located above the filter cloth, the gypsum cyclone 1 and the inlet of the gypsum water nozzle, the outlet of the filter buffer tank 2 and the filter nozzle The inlet is connected, and the outlet of the flushing water tank 3 is connected with the inlet of the flushing water nozzle.
- the present invention also includes a vacuum pump 6, a steam-water separator 7, a water recycling tank 13, and a gypsum storehouse 8 for collecting gypsum on the filter cloth, wherein the gypsum storehouse 8 is located below the filter cloth dehydrator 9; and the steam-water separator 7
- the inlet of the steam-water separator 7 is connected with the bottom outlet of the vacuum box 4, the liquid outlet of the steam-water separator 7 is connected with the water reuse tank 13, and the gas outlet of the steam-water separator 7 is connected with the inlet of the vacuum pump 6.
- the slurry purification and water collection method based on the filter cloth dehydrator of the present invention includes the following steps:
- the gypsum water output by the gypsum cyclone 1 is sprayed onto the filter cloth through a gypsum water nozzle.
- the water in the gypsum water is filtered by the filter cloth and enters the vacuum box 4
- the gypsum in the gypsum water adheres to the filter cloth, thereby forming a porous gypsum layer on the filter cloth.
- the gypsum layer enters the filter dehydration area 11 with the filter cloth driven by the belt shaft 5.
- the filter buffer tank 2 The output filtrate is sprayed onto the gypsum layer through the filtrate nozzle, and then under the suction action of the vacuum box 4, the filtrate is sequentially filtered through the gypsum layer and filter cloth and then enters the vacuum box 4, while most of the filtrate is
- the particulate matter is attached to the surface of the gypsum layer or in the gypsum layer, and the remaining particulate matter is attached to the surface of the filter cloth to realize the solid-liquid separation of the filtrate; among them, the travel distance of the gypsum slurry in the gypsum dehydration area 10 is 4m-6m; the gypsum layer is in the The travel distance in the filtrate dehydration area is 6m-8m;
- the gypsum layer follows the filter cloth into the gypsum washing area 12, and at the same time, the flushing water output from the washing water tank 3 is sprayed onto the gypsum layer through the washing water nozzle to reduce the chloride ion concentration in the gypsum.
- Part of the spray water is in the vacuum box. 4 enters into the vacuum box 4 under the suction action of 4, and the remaining spray water and gypsum layer continue to advance with the filter cloth, peel off when the filter cloth turns downward and fall into the gypsum storage 8 under the action of gravity.
- the water in the vacuum box 4 enters the steam-water separator 7 under the action of the vacuum pump 6 for gas-liquid separation.
- the separated liquid enters the water recycling tank 13, and the separated gas enters the vacuum pump 6, and the water recycling tank
- the water in 13 is physically treated to ensure that the solid content of the filtered and recovered liquid is within 0.1%, which can meet the replacement of process water, so as to meet the water replenishment of the desulfurization system, and realize a more water-saving operation mode while ensuring the water balance of the desulfurization system. It is of great significance to the safe and stable operation of the desulfurization system.
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Abstract
Disclosed are a slurry purifying and water collecting system and method based on a filter cloth dehydrator. The filter cloth dehydrator (9) comprises a filter cloth and two belt rotating shafts (5), wherein the filter cloth is of an annular structure; the filter cloth bypasses the two belt rotating shafts (5); the space between the two belt rotating shafts (5) is divided into a gypsum dehydration area (10), a filtrate dehydration area (11) and a gypsum flushing area (12); the gypsum dehydration area (10), the filtrate dehydration area (11) and the gypsum flushing area (12) are sequentially arranged in the movement direction of the filter cloth above; a vacuum box (4) is located between the two belt rotating shafts (5); the filter cloth surrounds the vacuum box (4); a top opening of the vacuum box (4) is in contact with the bottom of an upper half of the filter cloth; a gypsum water spray head is arranged in the gypsum dehydration area (10); a filtrate spray head is arranged in the filtrate dehydration area (11); and a flushing spray head is arranged in the gypsum flushing area (12). According to the system and method, a general gypsum removal effect can be achieved, and solid-liquid separation of filtrate water and a low-density slurry is achieved.
Description
本发明属于节能环保技术领域，涉及一种基于滤布脱水机的浆液净化收水系统及方法。The invention belongs to the technical field of energy saving and environmental protection, and relates to a slurry purification water collection system and method based on a filter cloth dehydrator.
火电厂湿法脱硫工艺在机组低负荷工况下，机组脱硫系统可能出现水平衡不佳的问题即系统代入水量大于系统蒸发量，影响除雾器正常冲洗，长期运行可能会导致除雾器发生结垢甚至堵塞坍塌，影响机组运行的安全性；此外，脱硫系统由于补水水质较差或长期不正常运行等因素可能会导致吸收塔浆液变质，产生大量需要置换或废弃的浆液，由于变质浆液中杂质较多、无法回用且处置难度大，给电力生产带来了极大的处理难度。In the thermal power plant wet desulfurization process, under the low load conditions of the unit, the desulfurization system of the unit may have a problem of poor water balance, that is, the amount of water substituted into the system is greater than the system evaporation, which affects the normal flushing of the demister, and long-term operation may cause the demister to occur Scaling or even clogging and collapse will affect the safety of the unit operation; in addition, the desulfurization system may cause deterioration of the absorption tower slurry due to poor water quality or long-term abnormal operation, resulting in a large amount of slurry that needs to be replaced or discarded. There are many impurities, cannot be reused, and the disposal is difficult, which brings great processing difficulty to power production.
现有的真空皮带脱水机固液分离设备主要用于大颗粒石膏的脱水，其装置对低密度石膏浆液适用性差，极易发生堵塞，且过滤精度低，无法适用于滤液水、变质浆液或低密度石膏浆液中清水的提取。The existing solid-liquid separation equipment of vacuum belt dehydrator is mainly used for the dehydration of large-particle gypsum. Its device has poor applicability to low-density gypsum slurry, is prone to clogging, and has low filtration accuracy. Extraction of clean water from density gypsum slurry.
【发明内容】[Summary of the invention]
本发明的目的在于克服上述现有技术的缺点，提供了一种基于滤布脱水机的浆液净化收水系统及方法，该系统及方法能够在满足正常石膏脱除作用的同时，实现滤液水及低密度浆液的固液分离。The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and provide a slurry purification and water collection system and method based on a filter cloth dewatering machine. The system and method can satisfy the normal gypsum removal effect while achieving filtrate water Solid-liquid separation of low-density slurry.
为达到上述目的，本发明采用以下技术方案予以实现：In order to achieve the above objectives, the present invention adopts the following technical solutions to achieve:
本发明所述的基于滤布脱水机的浆液净化收水系统包括滤布脱水机、真空箱、石膏旋流器、过滤液缓冲箱及冲洗水箱；The slurry purification water collection system based on the filter cloth dehydrator of the present invention includes a filter cloth dehydrator, a vacuum box, a gypsum cyclone, a filter buffer tank and a flushing water tank;
所述滤布脱水机包括滤布及两根皮带转轴，滤布为环状结构，其中，滤布绕过两根皮带转轴，两根皮带转轴之间分为石膏脱水区域、过滤液脱水区域及石膏冲洗区域，石膏脱水区域、过滤液脱水区域及石膏冲洗区域沿上方滤布的运动方向依次分布，真空箱位于两根皮带转轴之间，滤布环绕于真空箱的周围，且真空箱的顶部开口与滤布中上半部分的底部相接触，石膏脱水区域内设置有石膏水喷头，过滤液脱水区域内设置有过滤液喷头，石膏冲洗区域内设置有冲洗喷头，其中，石膏水喷头、过滤液喷头及冲洗喷头均位于滤布的上方，石膏旋流器与石膏水喷头的入口，过滤液缓冲箱的出口与过滤液喷头的入口相连通，冲洗水箱的出口与冲洗水喷头的入口相连通。The filter cloth dehydrator includes a filter cloth and two belt shafts. The filter cloth has a ring structure. The filter cloth bypasses the two belt shafts. The two belt shafts are divided into a gypsum dehydration area, a filtrate dehydration area, and Gypsum washing area, gypsum dehydration area, filtrate dehydration area and gypsum washing area are distributed in order along the movement direction of the upper filter cloth. The vacuum box is located between the two belt shafts. The filter cloth surrounds the vacuum box and the top of the vacuum box. The opening is in contact with the bottom of the upper part of the filter cloth. Gypsum water nozzles are set in the gypsum dehydration area, filtrate nozzles are set in the filtrate dehydration area, and flushing nozzles are set in the gypsum washing area. Among them, gypsum water nozzles and filter The liquid nozzle and the flushing nozzle are located above the filter cloth, the gypsum cyclone is connected to the inlet of the gypsum water nozzle, the outlet of the filtrate buffer tank is connected with the inlet of the filtrate nozzle, and the outlet of the flushing water tank is connected with the inlet of the flushing water nozzle. .
还包括用于对滤布上的石膏进行收集的石膏库，其中，石膏库位于滤布脱水机的下方。It also includes a gypsum storehouse for collecting gypsum on the filter cloth, wherein the gypsum storehouse is located under the filter cloth dehydrator.
还包括真空泵、汽水分离器及回用水箱，其中，汽水分离器的入口与真空箱的底部出口相连通，汽水分离器的液体出口与回用水箱相连通，汽水分离器的气体出口与真空泵的入口相连通。It also includes a vacuum pump, a steam-water separator and a water recycling tank. The inlet of the steam-water separator is connected with the bottom outlet of the vacuum box, the liquid outlet of the steam-water separator is connected with the water recycling tank, and the gas outlet of the steam-water separator is connected to the vacuum pump. The entrance is connected.
本发明所述的基于滤布脱水机的浆液净化收水方法包括以下步骤：The slurry purification and water collection method based on the filter cloth dehydrator of the present invention includes the following steps:
石膏旋流器输出的石膏水经石膏水喷头喷洒到滤布上，在石膏脱水区域内，在真空箱的抽吸作用下，石膏水中的水经滤布过滤后进入到真空箱内，石膏水中的石膏附着在滤布上，从而在滤布上形成一层多孔的石膏层，石膏层随滤布在皮带转轴的带动下进入到过滤液脱水区域中，过滤液缓冲箱输出的过滤液经过滤液喷头喷洒到石膏层上，然后在真空箱的抽吸作用下，过滤液经石膏层及滤布依次过滤后进入到真空箱中，同时过滤液中的大部分颗粒物附着在石膏层的表面或者石膏层内，剩余颗粒物附着在滤布的表面，以实现过滤液的固液分离；The gypsum water output by the gypsum cyclone is sprayed onto the filter cloth through the gypsum water nozzle. In the gypsum dehydration area, under the suction of the vacuum box, the water in the gypsum water is filtered by the filter cloth and enters the vacuum box. The gypsum water The gypsum adheres to the filter cloth, thereby forming a porous gypsum layer on the filter cloth. The gypsum layer enters the filter dehydration area with the filter cloth driven by the belt shaft, and the filtrate output from the filtrate buffer tank is filtered through the filtrate. The nozzle is sprayed onto the gypsum layer, and then under the suction of the vacuum box, the filtrate is filtered through the gypsum layer and the filter cloth and then enters the vacuum box. At the same time, most of the particles in the filtrate are attached to the surface of the gypsum layer or gypsum. In the layer, the remaining particles are attached to the surface of the filter cloth to realize the solid-liquid separation of the filtrate;
石膏层跟随滤布进入到石膏冲洗区域内，同时冲洗水箱输出的冲洗水经冲洗水喷头喷淋到石膏层上，以降低石膏中的氯离子浓度，其中，部分喷淋水在真空箱的抽吸作用下进入到真空箱内，剩余喷淋水及石膏层跟随滤布继续前进，在滤布向下拐弯时剥落并在重力作用下掉落到石膏库中。The gypsum layer follows the filter cloth into the gypsum washing area, and at the same time, the flushing water output from the washing water tank is sprayed onto the gypsum layer through the washing water nozzle to reduce the chloride ion concentration in the gypsum. Part of the spray water is pumped by the vacuum box. It enters into the vacuum box under the action of suction, and the remaining spray water and gypsum layer continue to advance with the filter cloth, peel off when the filter cloth bends downwards and fall into the gypsum storage under the action of gravity.
石膏浆液在石膏脱水区域的行进距离为4m-6m。The travel distance of gypsum slurry in the gypsum dehydration area is 4m-6m.
石膏层在滤液脱水区域内的行进距离为6m-8m。The travel distance of the gypsum layer in the filtrate dehydration area is 6m-8m.
与现有技术相比，本发明具有以下有益效果：Compared with the prior art, the present invention has the following beneficial effects:
本发明所述的基于滤布脱水机的浆液净化收水系统及方法在具体操作时，先将石膏水喷洒到滤布上，并在真空箱抽吸的作用下，在滤布上形成一层多孔的石膏层，再将过滤液喷洒到石膏层上，并在真空箱抽吸的作用下，通过石膏层对过滤液进行一级过滤，再通过滤布对过滤液进行二级过滤，实现滤液水及低密度浆液的固液分离，从而在满足正常石膏脱除作用的同时，实现滤液水及低密度浆液的固液分离，相比于传统的真空皮带脱水机，本发明的功能性更加丰富，具备处理滤液水、低浓度石膏浆液、变质浆液及废水等作用。本发明的深度治理意义还在于通过石膏层以及滤布的双重过滤作用，可将滤液水中的固含量降低至工艺水要求范围内，满足除雾器冲洗或工艺水制浆替代使用，达到优化脱硫系统水平衡的目的。The slurry purification and water collection system and method based on the filter cloth dehydrator of the present invention first spray gypsum water on the filter cloth during specific operation, and form a layer on the filter cloth under the action of the vacuum box suction The porous gypsum layer, and then spray the filtrate on the gypsum layer, and under the action of the vacuum box suction, the filtrate is filtered through the gypsum layer, and then the filtrate is filtered through the filter cloth to achieve the filtrate. Solid-liquid separation of water and low-density slurry, so as to achieve the solid-liquid separation of filtrate water and low-density slurry while satisfying the normal gypsum removal effect. Compared with the traditional vacuum belt dehydrator, the present invention has more functions , It has the functions of treating filtrate water, low-concentration gypsum slurry, deteriorated slurry and wastewater. The in-depth treatment significance of the present invention is also that through the dual filtration effect of the gypsum layer and the filter cloth, the solid content in the filtrate water can be reduced to the required range of process water, which can meet the alternative use of mist eliminator washing or process water pulping, and achieve optimized desulfurization. The purpose of system water balance.
图1为本发明的原理图。Figure 1 is a schematic diagram of the present invention.
其中，1为石膏旋流器、2为过滤液缓冲箱、3为冲洗水箱、4为真空箱、5为皮带转轴、6为真空泵、7为汽水分离器、8为石膏库、9为滤布脱水机、10为石膏脱水区域、11为过滤液脱水区域、12为石膏冲洗区域、13为回用水箱。Among them, 1 is a gypsum cyclone, 2 is a filtrate buffer tank, 3 is a flushing water tank, 4 is a vacuum tank, 5 is a belt shaft, 6 is a vacuum pump, 7 is a steam separator, 8 is a gypsum storehouse, and 9 is a filter cloth The dehydrator, 10 is a gypsum dehydration area, 11 is a filtrate dehydration area, 12 is a gypsum washing area, and 13 is a water recycling tank.
为了使本技术领域的人员更好地理解本发明方案，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分的实施例，不是全部的实施例，而并非要限制本发明公开的范围。此外，在以下说明中，省略了对公知结构和技术的描述，以避免不必要的混淆本发明公开的概念。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本发明保护的范围。In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only The embodiments are a part of the present invention, not all the embodiments, and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts disclosed in the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
在附图中示出了根据本发明公开实施例的各种结构示意图。这些图并非是按比例绘制的，其中为了清楚表达的目的，放大了某些细节，并且可能省略了某些细节。图中所示出的各种区域、层的形状及它们之间的相对大小、位置关系仅是示例性的，实际中可能由于制造公差或技术限制而有所偏差，并且本领域技术人员根据实际所需可以另外设计具有不同形状、大小、相对位置的区域/层。The drawings show various structural schematic diagrams according to the disclosed embodiments of the present invention. These figures are not drawn to scale, some details are enlarged and some details may be omitted for the purpose of clarity. The shapes of the various regions and layers shown in the figure and the relative size and positional relationship between them are only exemplary. In practice, there may be deviations due to manufacturing tolerances or technical limitations. Areas/layers with different shapes, sizes, and relative positions can be designed as needed.
本发明公开的上下文中，当将一层/元件称作位于另一层/元件“上”时，该层/元件可以直接位于该另一层/元件上，或者它们之间可以存在居中层/元件。另外，如果在一种朝向中一层/元件位于另一层/元件“上”，那么当调转朝向时，该层/元件可以位于该另一层/元件“下”。In the context of the present disclosure, when a layer/element is referred to as being "on" another layer/element, the layer/element may be directly on the other layer/element, or there may be an intermediate layer/element between them. element. In addition, if a layer/element is located "on" another layer/element in one orientation, the layer/element may be located "under" the other layer/element when the orientation is reversed.
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本发明的实施例能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或 单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。It should be noted that the terms "first" and "second" in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those clearly listed. Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.
下面结合附图对本发明做进一步详细描述：The present invention will be described in further detail below in conjunction with the accompanying drawings:
参见图1，本发明所述的基于滤布脱水机的浆液净化收水系统包括滤布脱水机9、真空箱4、石膏旋流器1、过滤液缓冲箱2及冲洗水箱3；所述滤布脱水机9包括滤布及两根皮带转轴5，滤布为环状结构，其中，滤布绕过两根皮带转轴5，两根皮带转轴5之间分为石膏脱水区域10、过滤液脱水区域11及石膏冲洗区域12，石膏脱水区域10、过滤液脱水区域11及石膏冲洗区域12沿上方滤布的运动方向依次分布，真空箱4位于两根皮带转轴5之间，滤布环绕于真空箱4的周围，且真空箱4的顶部开口与滤布中上半部分的底部相接触，石膏脱水区域10内设置有石膏水喷头，过滤液脱水区域11内设置有过滤液喷头，石膏冲洗区域12内设置有冲洗喷头，其中，石膏水喷头、过滤液喷头及冲洗喷头均位于滤布的上方，石膏旋流器1与石膏水喷头的入口，过滤液缓冲箱2的出口与过滤液喷头的入口相连通，冲洗水箱3的出口与冲洗水喷头的入口相连通。1, the slurry purification water collection system based on the filter cloth dehydrator of the present invention includes a filter cloth dehydrator 9, a vacuum box 4, a gypsum cyclone 1, a filter buffer tank 2 and a washing water tank 3; The cloth dewatering machine 9 includes a filter cloth and two belt shafts 5, the filter cloth has a ring structure, in which the filter cloth bypasses the two belt shafts 5, and the two belt shafts 5 are divided into a gypsum dehydration area 10 and filter liquid dehydration Area 11 and gypsum washing area 12, gypsum dehydration area 10, filtrate dehydration area 11 and gypsum washing area 12 are distributed in sequence along the movement direction of the upper filter cloth. The vacuum box 4 is located between the two belt shafts 5, and the filter cloth surrounds the vacuum. Around the box 4, and the top opening of the vacuum box 4 is in contact with the bottom of the upper half of the filter cloth, gypsum water nozzles are set in the gypsum dehydration area 10, filtrate nozzles are set in the filtrate dehydration area 11, and the gypsum washing area There are flushing nozzles in 12, among which the gypsum water nozzle, the filtrate nozzle and the flushing nozzle are all located above the filter cloth, the gypsum cyclone 1 and the inlet of the gypsum water nozzle, the outlet of the filter buffer tank 2 and the filter nozzle The inlet is connected, and the outlet of the flushing water tank 3 is connected with the inlet of the flushing water nozzle.
本发明还包括真空泵6、汽水分离器7、回用水箱13及用于对滤布上的石膏进行收集的石膏库8，其中，石膏库8位于滤布脱水机9的下方；汽水分离器7的入口与真空箱4的底部出口相连通，汽水分离器7的液体出口与回用水箱13相连通，汽水分离器7的气体出口与真空泵6的入口相连通。The present invention also includes a vacuum pump 6, a steam-water separator 7, a water recycling tank 13, and a gypsum storehouse 8 for collecting gypsum on the filter cloth, wherein the gypsum storehouse 8 is located below the filter cloth dehydrator 9; and the steam-water separator 7 The inlet of the steam-water separator 7 is connected with the bottom outlet of the vacuum box 4, the liquid outlet of the steam-water separator 7 is connected with the water reuse tank 13, and the gas outlet of the steam-water separator 7 is connected with the inlet of the vacuum pump 6.
本发明所述的基于滤布脱水机的浆液净化收水方法包括以下步骤：The slurry purification and water collection method based on the filter cloth dehydrator of the present invention includes the following steps:
石膏旋流器1输出的石膏水经石膏水喷头喷洒到滤布上，在石膏脱水区域10内，在真空箱4的抽吸作用下，石膏水中的水经滤布过滤后进入到真空箱4内， 石膏水中的石膏附着在滤布上，从而在滤布上形成一层多孔的石膏层，石膏层随滤布在皮带转轴5的带动下进入到过滤液脱水区域11中，过滤液缓冲箱2输出的过滤液经过滤液喷头喷洒到石膏层上，然后在真空箱4的抽吸作用下，过滤液经石膏层及滤布依次过滤后进入到真空箱4中，同时过滤液中的大部分颗粒物附着在石膏层的表面或者石膏层内，剩余颗粒物附着在滤布的表面，以实现过滤液的固液分离；其中，石膏浆液在石膏脱水区域10的行进距离为4m-6m；石膏层在滤液脱水区域内的行进距离为6m-8m；The gypsum water output by the gypsum cyclone 1 is sprayed onto the filter cloth through a gypsum water nozzle. In the gypsum dehydration area 10, under the suction action of the vacuum box 4, the water in the gypsum water is filtered by the filter cloth and enters the vacuum box 4 Inside, the gypsum in the gypsum water adheres to the filter cloth, thereby forming a porous gypsum layer on the filter cloth. The gypsum layer enters the filter dehydration area 11 with the filter cloth driven by the belt shaft 5. The filter buffer tank 2 The output filtrate is sprayed onto the gypsum layer through the filtrate nozzle, and then under the suction action of the vacuum box 4, the filtrate is sequentially filtered through the gypsum layer and filter cloth and then enters the vacuum box 4, while most of the filtrate is The particulate matter is attached to the surface of the gypsum layer or in the gypsum layer, and the remaining particulate matter is attached to the surface of the filter cloth to realize the solid-liquid separation of the filtrate; among them, the travel distance of the gypsum slurry in the gypsum dehydration area 10 is 4m-6m; the gypsum layer is in the The travel distance in the filtrate dehydration area is 6m-8m;
石膏层跟随滤布进入到石膏冲洗区域12内，同时冲洗水箱3输出的冲洗水经冲洗水喷头喷淋到石膏层上，以降低石膏中的氯离子浓度，其中，部分喷淋水在真空箱4的抽吸作用下进入到真空箱4内，剩余喷淋水及石膏层跟随滤布继续前进，在滤布向下拐弯时剥落并在重力作用下掉落到石膏库8中。The gypsum layer follows the filter cloth into the gypsum washing area 12, and at the same time, the flushing water output from the washing water tank 3 is sprayed onto the gypsum layer through the washing water nozzle to reduce the chloride ion concentration in the gypsum. Part of the spray water is in the vacuum box. 4 enters into the vacuum box 4 under the suction action of 4, and the remaining spray water and gypsum layer continue to advance with the filter cloth, peel off when the filter cloth turns downward and fall into the gypsum storage 8 under the action of gravity.
真空箱4中的水在真空泵6的作用下进入到汽水分离器7中进行气液分离，其中分离出来的液体进入到回用水箱13中，分离出来的气体进入到真空泵6中，回用水箱13中的水经物理处理，保证过滤回收液含固量在0.1％以内，满足工艺水替代等，即可满足脱硫系统补水，在保证脱硫系统的水平衡的同时实现更加节水的运行方式，对脱硫系统的安全稳定运行具有重要的意义。The water in the vacuum box 4 enters the steam-water separator 7 under the action of the vacuum pump 6 for gas-liquid separation. The separated liquid enters the water recycling tank 13, and the separated gas enters the vacuum pump 6, and the water recycling tank The water in 13 is physically treated to ensure that the solid content of the filtered and recovered liquid is within 0.1%, which can meet the replacement of process water, so as to meet the water replenishment of the desulfurization system, and realize a more water-saving operation mode while ensuring the water balance of the desulfurization system. It is of great significance to the safe and stable operation of the desulfurization system.
以上内容仅为说明本发明的技术思想，不能以此限定本发明的保护范围，凡是按照本发明提出的技术思想，在技术方案基础上所做的任何改动，均落入本发明权利要求书的保护范围之内。The above content is only to illustrate the technical ideas of the present invention, and cannot be used to limit the scope of protection of the present invention. Any changes made on the basis of the technical solutions based on the technical ideas proposed by the present invention fall into the claims of the present invention. Within the scope of protection.
Claims (6)
- 一种基于滤布脱水机的浆液净化收水系统，其特征在于，包括滤布脱水机(9)、真空箱(4)、石膏旋流器(1)、过滤液缓冲箱(2)及冲洗水箱(3)；A slurry purification water collection system based on a filter cloth dehydrator, which is characterized by comprising a filter cloth dehydrator (9), a vacuum box (4), a gypsum cyclone (1), a filter buffer tank (2) and a flushing Water tank (3);所述滤布脱水机(9)包括滤布及两根皮带转轴(5)，滤布为环状结构，其中，滤布绕过两根皮带转轴(5)，两根皮带转轴(5)之间分为石膏脱水区域(10)、过滤液脱水区域(11)及石膏冲洗区域(12)，石膏脱水区域(10)、过滤液脱水区域(11)及石膏冲洗区域(12)沿上方滤布的运动方向依次分布，真空箱(4)位于两根皮带转轴(5)之间，滤布环绕于真空箱(4)的周围，且真空箱(4)的顶部开口与滤布中上半部分的底部相接触，石膏脱水区域(10)内设置有石膏水喷头，过滤液脱水区域(11)内设置有过滤液喷头，石膏冲洗区域(12)内设置有冲洗喷头，其中，石膏水喷头、过滤液喷头及冲洗喷头均位于滤布的上方，石膏旋流器(1)与石膏水喷头的入口，过滤液缓冲箱(2)的出口与过滤液喷头的入口相连通，冲洗水箱(3)的出口与冲洗水喷头的入口相连通。The filter cloth dewatering machine (9) includes a filter cloth and two belt shafts (5). The filter cloth has a ring structure, wherein the filter cloth bypasses the two belt shafts (5), one of the two belt shafts (5) It is divided into gypsum dehydration area (10), filtrate dehydration area (11) and gypsum washing area (12), gypsum dehydration area (10), filtrate dehydration area (11) and gypsum washing area (12) along the upper filter cloth The direction of movement of the vacuum box (4) is located between the two belt shafts (5), the filter cloth surrounds the vacuum box (4), and the top opening of the vacuum box (4) and the upper half of the filter cloth The gypsum dehydration area (10) is provided with gypsum water nozzles, the filtrate dehydration area (11) is provided with filtrate nozzles, and the gypsum washing area (12) is provided with flushing nozzles. Among them, the gypsum water nozzle, The filtrate nozzle and the flushing nozzle are located above the filter cloth, the gypsum cyclone (1) is connected to the inlet of the gypsum water nozzle, the outlet of the filtrate buffer tank (2) is connected with the inlet of the filtrate nozzle, and the flushing water tank (3) The outlet is connected to the inlet of the flushing water nozzle.
- 根据权利要求1所述的基于滤布脱水机的浆液净化收水系统，其特征在于，还包括用于对滤布上的石膏进行收集的石膏库(8)，其中，石膏库(8)位于滤布脱水机(9)的下方。The slurry purification water collection system based on the filter cloth dehydrator according to claim 1, characterized in that it further comprises a gypsum storehouse (8) for collecting gypsum on the filter cloth, wherein the gypsum storehouse (8) is located at Below the filter cloth dehydrator (9).
- 根据权利要求2所述的基于滤布脱水机的浆液净化收水系统，其特征在于，还包括真空泵(6)、汽水分离器(7)及回用水箱(13)，其中，汽水分离器(7)的入口与真空箱(4)的底部出口相连通，汽水分离器(7)的液体出口与回用水箱(13)相连通，汽水分离器(7)的气体出口与真空泵(6)的入口相连通。The slurry purification water collection system based on the filter cloth dehydrator according to claim 2, characterized in that it further comprises a vacuum pump (6), a steam-water separator (7) and a water reuse tank (13), wherein the steam-water separator ( The inlet of 7) is connected to the bottom outlet of the vacuum box (4), the liquid outlet of the steam-water separator (7) is connected to the water reuse tank (13), and the gas outlet of the steam-water separator (7) is connected to the vacuum pump (6). The entrance is connected.
- 一种基于滤布脱水机的浆液净化收水方法，其特征在于，其特征在于，基于权利要求1所述的基于滤布脱水机的浆液净化收水系统，包括以下步骤：A slurry purification and water collection method based on a filter cloth dehydrator is characterized in that the slurry purification and water collection system based on a filter cloth dehydrator according to claim 1 comprises the following steps:石膏旋流器(1)输出的石膏水经石膏水喷头喷洒到滤布上，在石膏脱水区域(10)内，在真空箱(4)的抽吸作用下，石膏水中的水经滤布过滤后进入到真空箱(4)内，石膏水中的石膏附着在滤布上，从而在滤布上形成一层多孔的石膏层，石膏层随滤布在皮带转轴(5)的带动下进入到过滤液脱水区域(11)中，过滤液缓冲箱(2)输出的过滤液经过滤液喷头喷洒到石膏层上，然后在真空箱(4)的抽吸作用下，过滤液经石膏层及滤布依次过滤后进入到真空箱(4)中，同时过滤液中的大部分颗粒物附着在石膏层的表面或者石膏层内，剩余颗粒物附着在滤布的表面，以实现过滤液的固液分离；The gypsum water output by the gypsum cyclone (1) is sprayed onto the filter cloth through the gypsum water nozzle. In the gypsum dehydration area (10), under the suction action of the vacuum box (4), the water in the gypsum water is filtered by the filter cloth After entering the vacuum box (4), the gypsum in the gypsum water adheres to the filter cloth, thereby forming a porous gypsum layer on the filter cloth. The gypsum layer enters the filter cloth driven by the belt shaft (5). In the liquid dehydration area (11), the filtrate output from the filtrate buffer tank (2) is sprayed onto the gypsum layer through the filtrate nozzle, and then under the suction of the vacuum box (4), the filtrate passes through the gypsum layer and the filter cloth in turn After filtration, it enters into the vacuum box (4), while most of the particles in the filtrate are attached to the surface of the gypsum layer or in the gypsum layer, and the remaining particles are attached to the surface of the filter cloth to realize the solid-liquid separation of the filtrate;石膏层跟随滤布进入到石膏冲洗区域(12)内，同时冲洗水箱(3)输出的冲洗水经冲洗水喷头喷淋到石膏层上，以降低石膏中的氯离子浓度，其中，部分喷淋水在真空箱(4)的抽吸作用下进入到真空箱(4)内，剩余喷淋水及石膏层跟随滤布继续前进，然后在滤布向下拐弯时剥落并在重力作用下掉落到石膏库(8)中。The gypsum layer follows the filter cloth into the gypsum washing area (12), and the flushing water output from the washing water tank (3) is sprayed onto the gypsum layer through the washing water nozzle to reduce the chloride ion concentration in the gypsum. Part of it is sprayed. The water enters into the vacuum box (4) under the suction of the vacuum box (4), the remaining spray water and gypsum layer continue to advance with the filter cloth, and then peel off when the filter cloth turns downward and fall under the action of gravity Go to the gypsum storehouse (8).
- 根据权利要求4所述的基于滤布脱水机的浆液净化收水方法，其特征在于，石膏浆液在石膏脱水区域(10)的行进距离为4m-6m。The slurry purification and water collection method based on a filter cloth dehydrator according to claim 4, characterized in that the travel distance of the gypsum slurry in the gypsum dehydration zone (10) is 4m-6m.
- 根据权利要求4所述的基于滤布脱水机的浆液净化收水方法，其特征在于，石膏层在滤液脱水区域内的行进距离为6m-8m。The slurry purification and water collection method based on a filter cloth dewatering machine according to claim 4, wherein the travel distance of the gypsum layer in the filtrate dewatering area is 6m-8m.
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