CN2816013Y - Paper-pulp washing blackliquid concentration device - Google Patents
Paper-pulp washing blackliquid concentration device Download PDFInfo
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- CN2816013Y CN2816013Y CN 200520031809 CN200520031809U CN2816013Y CN 2816013 Y CN2816013 Y CN 2816013Y CN 200520031809 CN200520031809 CN 200520031809 CN 200520031809 U CN200520031809 U CN 200520031809U CN 2816013 Y CN2816013 Y CN 2816013Y
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Abstract
The utility model relates to a paper pulp washing black liquid concentration device, a vertical reverse direction washing device is composed of a heat insulating casing and multiple stages of reverse direction washing devices, the upper stage and the lower stage are connected end to end, and each stage reverse direction washing device is provided with an accumulating sensor, a temperature sensor and a speed rate sensor; a filter liquid heater is respectively connected with the corresponding stage reverse direction washing device of the reverse direction washing device through an electromagnetic valve and is also communicated with a vacuum tank and a compressed air tank; meanwhile, the filter liquid heater is communicated with a clear water heating tank through a water pouring pipe and a water return pipe. The utility model can continuously control multiple stages of reverse direction wash by self, the extraction rate of the black liquid can be effectively improved and can reach more than 99 percent, the concentration of the discharged black liquid can reach more than 16 percent, the washing water for pulp can be effectively saved and the washing water of per tone pulp is less than 10 tons. Thereby, the utility model can solve the problem that the water consumption for papermaking is high always and is favorable for the environment protection. Meanwhile, no intermediate section waste water can be generated and the polluted water treating cost can be reduced by more than 50 percent.
Description
Technical field
The utility model relates to a kind of paper making pulp washing plant, particularly pulp washing black liquor concentrating unit.
Background technology
Papermaking is to utilize the fiber in the plant usually to produce, and this Mierocrystalline cellulose is mainly from the plants such as timber, fiber crops, wheat straw, straw, reed and bagasse.Making one ton of paper needs 2.6 tons of raw materials, and wherein the non-cellulose material accounts for more than 1.6 tons, and this non-cellulose material needs just can remove with a large amount of water washings.Usually, the way of washing pulp is to rely on repeatedly to squeeze filter reverse waste liquid with concentration difference, diffusion and replacement fiber middle and high concentration waste liquid.At present, when China's paper-making industry was handled pulp washing, the washing plant kind of employing was a lot: continue to use primary static pressure wash trough, adopt a large amount of clear water washing pulps, displace wherein non-cellulose material such as xylogen, ton surplus hemicellulose, ashes, the pectin etc., ton slurry water consumption 300; Have and adopt pure fashion of extrusion mechanical means, as acroll press washer, to roller pulp extruding machine; Adopt the cylinder drum-type in addition, the drop side compression type squeezes filter, diffusion and replacement equipment.They all are the unit operation, disposable washing, and water loss is still very big; Also have and adopt three machine combination pressure wash hollanders,, but be difficult for insulation, make the air immerse generation saponification foam easily, cause influence, make troubles to production to production environment though it be a counter flow washing.In a word, no matter adopting above-mentioned which kind of method washs paper pulp, slurry after the washing still needs the later stage to clean, and all can produce a large amount of lower concentration middle-stage wastewaters in cleaning process, and washing ton slurry water loss is that extraction rate of black liquor is low between the 250-300 ton, the enrichment factor of black liquor is also lower, thereby, cause the waste water control workload big, the expense height.Simultaneously, also can cause serious environmental to pollute, be unfavorable for environment protection.
The utility model content
The purpose of this utility model is to provide a kind of pulp washing black liquor concentrating unit, it can overcome the deficiency of prior art, can reduce ton effectively and wash and starch and wash water loss, no longer produces middle-stage wastewater, water saving widely, and can the reverse multistage washing of automatically-controlled continuous.Can improve the extraction yield of black liquor effectively, make the enrichment factor height that extracts black liquor, its concentration reaches more than 16%.
Its solution is: this device is to adopt the next stage washer to squeeze the lower concentration filtrate that leaches, and is injected into the reverse multistage washing methods that the upper level washer displaces higher concentration filtrate, and paper pulp is washed.Its counter flow washing device is made of the multistage counter flow washing device that the upper and lower level initial and end of band housing of thermal insulation layer and interior setting thereof is connected.Every grade of counter flow washing device comprises extrusion filter structure and the molten displacement of the friendship mechanism two portions that are communicated with it.And first step counter flow washing device hands over molten displacement mechanism and the coupled slurry that leads to and be positioned at outside the housing to carry the extrusion filter structure to form by being positioned at the intravital one-level of shell.And every grade of counter flow washing device is provided with accumulation transmitter and rate sensor, be used to monitor the operating rate of adjusting slurry, make the slurry operation in the counter flow washing devices at different levels be consistent, also be provided with temperature sensor, make heat exchange system adjust hot water circulation speed, improve the filtrate temperature.Filtrate well heater by magnetic valve is connected with each corresponding stage counter flow washing device of counter flow washing device respectively is communicated with vacuum tank and compressed air tank respectively again, also is communicated with the clear water heating tank by notes, return water pipe respectively.In the filtrate well heater, inject hot water by the clear water heating tank, use for its heat exchange.
After being squeezed filter by first step extrusion filter structure, the filtrate of the 16% above high density of extruding directly send sewage works to handle, and the filter liquor concentration that extrude the second stage is directly given the spray storehouse less than 7%, replaces clear water dilution magma.From the filtrate of extruding below the third stage in vacuum mechanism is drawn into filtrate well heater at different levels, return to preset value through the heat exchange rear filtrate, again through the air operated mechanism slurry of force feed after respectively to the prime filter, recover the slurries ratio of slurry, after handing over ccontaining converting mechanism mixing, send next stage counter flow washing device again to.Its cycle operation is to rely on limit sensors and the magnetic valve that is provided with in the filtrate well heater, the corresponding connecting pipeline of warp is controlled operation automatically, and adjust 70% filtrate that control is extruded by being arranged on flow director on suction, the pressure line, be used for replenishing filtrate to the next stage lower concentration, to guarantee to replenish 70% of specified rate, thereby keep 1: 13 slurries of multistage slurry ratio, can make the automatic control operation of this device harmonious orderly.And extraction rate of black liquor is reached more than 99%, and ton dry pulp bath water is only about 9.1 tons, 10 tons of less thaies.
The multistage counter flow washing device that described upper and lower level initial and end is connected is the 2-12 level.
Described every grade of counter flow washing device is by fluted disc, it is by being connected with the propulsion source machine with its gear that is meshed, be connected with the fluted disc sleeve on the fluted disc and have the chassis of filtrate relief outlet, the chassis is provided with and hands over the plasma discharge material hole of molten displacement mechanism connection, and the filtrate channel that is communicated with the filtrate relief outlet and converge filtrate channel, on the fluted disc sleeve, be set with the interior filter cylinder that is connected with the chassis, be set with the Inner filter net that is connected with the chassis on it successively, outer leaching net and outer filter cylinder, in interior, the space that forms between the outer leaching net is for squeezing filter position, should squeeze and be provided with the crowded filter of the tapered spiral that is connected with the fluted disc sleeve in the filter position, constitute the extrusion filter structure.Bucket is connected the fluted disc below in the mixing, is set with bucket mixing outside in mixing on the bucket, is provided with vortex mixer in the cavity that forms between the inside and outside bucket of mixing, constitutes the molten displacement of friendship mechanism.And vortex mixer is connected in the mixing bucket by upper and lower layout and goes up and be " V " type and fall " ∧ " type mixing plate, and the mixing tooth plate is formed.When fluted disc rotates under the effect of propulsion source machine, force the fluted disc sleeve to rotate, and drive the crowded filter rotation of tapered spiral, slurry is squeezed filter; Simultaneously, fluted disc forces again that bucket rotates in the mixing, and drives vortex mixer and rotate, and slurry is carried out mixing, and handing over the molten slurries ratio that is replaced as is 1: 13 fluid slurry, offers next stage.
Described slurry carries the extrusion filter structure by the slurry transport tube of bringing hopper into, be provided with the spiral pusher in it, it is sleeved on the propelling movement axle that connects the propulsion source machine, and the slurry transport tube is made up of upper and lower two half cylinder, and second cylinder is netted, be provided with in second netted cylinder place the band leakage fluid dram the concentrated black liquid reservoir and constitute.But the spiral pusher is a chorate, and it is 2 that the spacing of its helix pitch from top to the end shunk this: 1-5: 1.
Described filtrate well heater is by the container for storing liquid that is interconnected through magnetic valve of heater case and interior setting thereof, and each container for storing liquid is provided with the upper and lower limit level sensor and constitutes.
The utility model multistage counter flow washing device that mainly to be vertical counter flow washing device be connected by the upper and lower level initial and end of insulation shell and interior setting thereof constitutes.Every grade of counter flow washing comprises the extrusion filter structure and hands over molten displacement mechanism two portions, and every grade of counter flow washing device is provided with the accumulation transmitter, rate sensor and temperature sensor; And the filtrate well heater is communicated with each corresponding stage counter flow washing device of counter flow washing device respectively by magnetic valve, is communicated with vacuum tank and compressed air tank again, and the clear water heating tank is communicated with the filtrate well heater by notes, return water pipe.Because the counter flow washing device is vertical, and the slurries ratio to be 1: 13 slurry be flow-like, so that slurry moves downward resistance is little, power consumption is low, the not enough 25KW of complete machine power consumption, and easy multistage combination, compact construction, high insulating effect can prevent the intrusion of housing outer air.Owing to adopt vertical filter screen, be not easy linked network and stop up again, continuously-running, the production efficiency height can be handled 25000 tons of dry pulps in year.Floor space is little simultaneously, the level of automation height, and action required personnel are few.It can not only carry out the reverse multistage washing of automatically-controlled continuous to paper pulp, makes pulp washing thorough, and the extraction rate of black liquor height reaches more than 99%, black liquor enrichment factor height, and its concentration reaches more than 16%.And can reduce ton effectively and wash and starch and wash water loss, make 10 tons of one ton of dry pulp washing water loss less thaies, and there is not middle-stage wastewater to produce, wash and starch with the prior art ton and to wash water consumption 250-300 ton and compare, but ton surplus the water saving 200, if produce 5000 ten thousand tons per year, can save 10,000,000,000 cubes of groundwater resource in 1 year in national paper-making pulping.Like this, not only solved the high problem of paper-making industry water loss, the burden that can alleviate the paper-making industry waste water control is more than 50%, and can also reduce the pollution problem of paper waste to environment, helps environment protection.And can thoroughly improve the production environment of paper-making industry.
In addition, this device can with the supporting use of alkali recovery equipment, can improve alkali recovery equipment throughput 20-40%, can save simultaneously the heat energy consumption 40-60% that alkali reclaims again.Moreover, for the concentrated black liquid that is discharged, can adopt compound acidization to handle, the waste water COD after the processing is reached below 400, fully can reuse.
Description of drawings
Fig. 1 is the structural representation of pulp washing black liquor concentrating unit.
Fig. 2 is a M place enlarged view among Fig. 1.
Fig. 3 is the A-A profile among Fig. 1.
Fig. 4 is the B-B profile among Fig. 1.
Fig. 5 is the front view on chassis among Fig. 2.
Fig. 6 is the C-C sectional view among Fig. 5.
Fig. 7 is that the liquid storage tank structure that is provided with in the filtrate well heater launches synoptic diagram.
Fig. 8 is the fundamental diagram of pulp washing black liquor concentrating unit.
Embodiment
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.
Among Fig. 1 to Fig. 8, the counter flow washing device is vertical, and six grades of counter flow washing devices that are connected by the upper and lower level initial and end of band housing 5 of thermal insulation layer and interior setting thereof constitute.Every grade of counter flow washing device comprise the extrusion filter structure and with its upper and lower layout and the molten displacement of friendship mechanism two portions of being connected.Carry extrusion filter structures 40 to constitute and first step counter flow washing device is communicated with by the one-level friendship molten displacement mechanism that is positioned at housing 5 and with it and be positioned at housing 5 outer slurries.Slurry carries extrusion filter structure 40 by the slurry transport tube of bringing hopper 43 into, be provided with spiral pusher 46 in it, it is sleeved on and pushes on the axle 45, this pushes axle 45 and is connected with slurry transport tube bearing, and be connected with the propulsion source buncher 38 of 1.5KW by belt transmission and constitute, and spiral pusher 46 is a chorate, and the spacing contraction ratio of its helix pitch from top to the end is 5: 1.The slurry transport tube is by upper and lower two semicircular cylinders 75, the butt joint of 42 flanges is connected as one, and at upper and lower semicircular cylinder 75, be evenly equipped with the upper and lower semicircle support fixation plate 44,76 of fixedlying connected on 42, can guarantee the full circle degree of slurry transport tube with it, thereby the parts in it can normally be moved, second cylinder 42 is netted, and is connected with semicircular concentrated black liquid reservoir 41 at second netted cylinder place, and it is provided with leakage fluid dram 39.The first step can be squeezed the concentrated black liquid that leaches by leakage fluid dram 39 and give off, and deliver to sewage works and handle.There is bucket 47 in the one-level mixing in the molten displacement of one-level friendship mechanism, it is fixedlyed connected with secondary fluted disc sleeve 71 by web plate 70 and towing plate 69, and with its rotation, in the one-level mixing, be set with bucket 48 outside the one-level mixing on the bucket 47, the bucket top is connected with the ring-like jet pipe 1 of one-level outside this mixing, third stage filtrate can be sprayed to the slurry after the filter.At inside and outside mixing bucket 47, be provided with 6 groups of uniform vortex mixers in the space that forms between 48, and each group vortex mixer is by fixedlying connected with bucket 47 in the one-level mixing and go to upper and lower one-level " V " the type mixing plates 2 of arranging and rotating thereupon, and one-level is fallen " ∧ " type mixing plate 3 and double cog mixing tooth plate 4 and constituted.And outside the mixing of the molten displacement of this friendship mechanism bottom, be connected with the accumulation transmitter 49 that links to each other with 3KW buncher 6, temperature sensor 50 and rate sensor 68 on the bucket 48.When slurry has packing phenomenon to produce, send information by piling up transmitter 49, send buncher 6 to, make it adjust rotating speed, after packing phenomenon disappeared, buncher 6 automatically restored to original rotating speed, continued works better.When slurry temperature is lower than 60 ℃ or when being higher than 85 ℃, temperature sensor 50 sends information, can make it the temperature ascending, descending of slurry by adjusting clear water heating tank delivering hot water's speed of circulation.
By counter flow washing device at the corresponding levels, slurry is carried out one-level squeeze filter, 70% black liquor in the pulp can be squeezed and leach, being discharged into the waste water control station handles, and the slurry after the filter is replenished the filtrate of extruding by third stage counter flow washing device, and behind the molten displacement of corresponding levels friendship mechanism mixing, formation slurries ratio is 1: 13 a slurry, sends into second stage counter flow washing device again.
Second stage counter flow washing device is by chassis 56, and it is fixedlyed connected with housing 5 by chassis overhang 66, and chassis 56 is provided with plasma discharge material hole 55, and filtrate channel 82,83, they the two with converge filtrate channel 84 and be communicated with, this passage is communicated with filtrate leakage fluid dram 67 again.The ring-like jet pipe 65 of secondary is connected the below on chassis 56.The awl fluted discs 63 that are positioned at below the chassis 56 are connected with chassis 56 by fluted disc steel ball 64, and again by being connected with 3KW propulsion source buncher 6 with its cone gear that is meshed 62 and transmission shaft 57, and transmission shaft 57 bearings are connected on the chassis 56.Be connected with fluted disc sleeve 71 in awl fluted disc 63 upper fixed, it links to each other with bucket 47 in the one-level mixing.Be set with filter cylinder 72 in the secondary that is tightly connected by steel ball 74 and web plate 70 on the fluted disc sleeve 71, fixedly connected with chassis 56 in its lower end, be set with secondary Inner filter net 73 successively on the filter cylinder 72 in the secondary, the outer filter cylinder 51 of secondary outer leaching net 52 and secondary, its upper end is connected with the outer bucket of one-level mixing 48 flanges, and fixedly connected with chassis 56 in the lower end, at the inside and outside filter screen 73 of secondary, form tapered cavity between 52, be referred to as to call crowded filter position.The tapered spiral that is positioned at this crowded filter position squeezes filter 53, and its upper end is connected on the towing plate 69 that links to each other with fluted disc sleeve 71, can rotate with fluted disc sleeve 71, and the lower end is connected with chassis 56 through bearing 54, constitutes secondary extrusion filter structure.Below boring fluted disc 63, be connected with bucket 61 in the secondary mixing, be set with the outer bucket 60 of the secondary mixing that is connected with chassis 56 on it, be provided with 6 groups of uniform vortex mixers in the space that forms between the two at them, constitute the molten displacement of secondary friendship mechanism.And each group vortex mixer is by fixedlying connected with bucket 61 in the secondary mixing and go to upper and lower secondary " V " the type mixing plate 58 of layout, and secondary falls " ∧ " type mixing plate 59 and double cog mixing tooth plate 7 and forms.And bucket is connected with secondary accumulation transmitter, temperature sensor and the rate sensor that links to each other with 3KW buncher 6 on 60 lower side outside the secondary mixing.Slurry in secondary counter flow washing device by squeezing filter washing, hand over molten displacement after, constitute the slurries ratio and be 1: 13 slurry, send subordinate's counter flow washing device.
Below third and fourth, the structure of the structure of five, six grades of counter flow washing devices and second stage counter flow washing device is identical.Just third and fourth, five, six grades of counter flow washing devices, their awl fluted disc is respectively by being connected with 2.2KW propulsion source buncher accordingly with its cone gear that is meshed and transmission shaft.
The filtrate well heater is made up of 4 container for storing liquids 77,78,79,80 of heater case 81 and interior setting thereof, all is connected with upper limit transmitter 89 and lower limit transmitter 90 on each container for storing liquid, in order to liquid level in the control container for storing liquid.The compressed air tank that links to each other with air compressor machine 31 29 by four tunnel one three-way electromagnetic valves 88 and corresponding pipe connecting respectively with container for storing liquid 77,78,79,80 are communicated with, can pressurization respectively in each container for storing liquid, force its discharge opeing; And the vacuum tank that links to each other with vacuum pump 30 28 by four tunnel one three-way electromagnetic valves 85 and corresponding pipe connecting respectively with container for storing liquid 77,78,79,80 are communicated with, and can will aspirate into vacuum in each container for storing liquid respectively, form negative pressure, so that filtrate is injected; Four tunnel one three-way electromagnetic valves 86 that are communicated with leakage fluid dram on the counter flow washing device chassis by corresponding pipe connecting respectively with container for storing liquid 77,78,79,80 are communicated with, and can aspirate filtrate respectively in each container for storing liquid, carry out heat exchange; Four tunnel one three-way electromagnetic valves 87 that are communicated with the ring-like jet pipe of counter flow washing device by corresponding pipe connecting respectively with container for storing liquid 77,78,79,80 are communicated with, can respectively filtrate in each container for storing liquid be extruded, enter the molten displacement of the friendship mechanism of upper level counter flow washing device, carry out mixing, formation slurries ratio is 1: 13 a slurry, offers next stage counter flow washing device.
Clear water heating tank 34 is by hot water pump 35, and flow director 36 and water injection pipe 93 are communicated with filtrate well heater 21,20,26,27 respectively, is communicated with filtrate well heater 21,20,26,27 respectively by return water pipe 37 again, forms hot water circulation loop.In each filtrate well heater, inject hot water by clear water heating tank 34, after heat exchange, return in the clear water heating tank 34, for recycling by return water pipe 37.And clear water heating tank 34 passes through hot water pump 33, and flow director 32 and water injection pipe 94 are communicated with the ring-like jet pipe 13 of Pyatyi, can replenish hot water in level V counter flow washing device.
Adopt this device to be: at first to be made into filtrate, to inject in the corresponding container for storing liquid of filtrate well heater, use for counter flow washing by apparatus settings filter liquor concentration below three grades to the process that paper pulp carries out counter flow washing.Secondly after magma being diluted to the slurries ratio and being 1: 13 slurry, slurry by hopper 43 feeding first step counter flow washing devices is carried in the extrusion filter structure, carry out one-level through chorate spiral pusher 46 and squeeze filter, can squeeze and leach 70% concentrated black liquid, its concentration can reach more than 16%, this concentrated black liquid is discharged through the leakage fluid dram 39 of concentrated black liquid reservoir 41, delivers to sewage works and handles.The concentrated black liquid of this discharge is if adopt compound acidization that this is handled, and the waste water COD after the processing is no more than 400, fully can reuse.Then, extrusion filter structure by third stage counter flow washing device squeezes 70% filtrate that leaches, its concentration is 2.95%, after pipe connecting 24 entered filtrate well heater 26 and carries out heat exchange, by pipe connecting 23 and the ring-like jet pipe 1 of one-level, filter disposed slurry at the corresponding levels was given in spray, and enter the molten displacement of friendship mechanism at the corresponding levels, after carrying out mixing, constitute the slurries ratio and be 1: 13 slurry after, enter second stage counter flow washing device again.
The slurries ratio that enters second stage counter flow washing device is 1: 13 a slurry, after secondary extrusion filter structure squeezes filter, squeezes 70% filtrate that leaches, its concentration is 6.85%, discharges through the pipe connecting that connects secondary chassis 56 leakage fluid drams 67, delivers to the spray storehouse, replace clear water, be used to dilute magma.And squeeze 70% filtrate that leaches by the extrusion filter structure of fourth stage counter flow washing device, its concentration is 1.15%, by pipe connecting 25 enter carry out heat exchange in the filtrate well heater 27 after, spray the slurry of giving after the corresponding levels are filtered through pipe connecting 22 and the ring-like jet pipe 65 of secondary, and enter at the corresponding levels hand over molten displacement mechanism to carry out mixing after, formation slurries ratio is 1: 13 a slurry, enters third stage counter flow washing device again.
The slurries ratio that enters third stage counter flow washing device is 1: 13 a slurry, after three grades of three grades of extrusion filter structures squeeze filter, squeeze 70% filtrate that leaches, concentration is 2.19%, enters filtrate well heater 26 by pipe connecting 24, after carrying out heat exchange, through pipe connecting 23 and the ring-like jet pipe 1 of one-level, spray is to one-level filter disposed slurry, behind the molten displacement of one-level friendship mechanism mixing, formation slurries ratio is 1: 13 a slurry, supplies with subordinate's counter flow washing device.And pass through water injection pipe 94 and the ring-like jet pipe 13 of Pyatyi by clear water heating tank 34, in level V counter flow washing device, inject the heating clear water, formation slurries ratio is 1: 13 a slurry, and squeeze filter, squeeze 70% filtrate that leaches, concentration is 0.45%, by pipe connecting 17 enter carry out heat exchange in the filtrate well heater 21 after, give the third stage the reverse slurry of washing after device is filtered through pipe connecting 16 and 9 sprays of tertiary circulation type jet pipe, and enter after the third stage hands over molten displacement mechanism to carry out mixing, formation slurries ratio is 1: 13 a slurry, enters fourth stage counter flow washing device again.
The slurries ratio that enters fourth stage counter flow washing device is 1: 13 a slurry, after level Four extrusion filter structure squeezes filter, squeeze 70% filtrate that leaches, concentration is 1.15%, enter filtrate well heater 27 by pipe connecting 25, after carrying out heat exchange, give second stage counter flow washing device through pipe connecting 22 and ring-like jet pipe 65 sprays of secondary.And can in the 6th grade of counter flow washing device, add clear water (or SYNTHETIC OPTICAL WHITNER) by pipe connecting 92 and six grades of ring-like jet pipes 15 according to customer requirements, formation slurries ratio is 1: 13 a slurry, squeeze filter by the 6th grade of extrusion filter structure, squeeze and leach 70% filtrate, its concentration is 0.13%, enter filtrate well heater 20 by pipe connecting 19, after carrying out heat exchange, spray to the slurry after the fourth stage filter through pipe connecting 18 and the ring-like jet pipe 11 of level Four, and enter the fourth stage and hand over molten displacement mechanism, after carrying out mixing, constituting the slurries ratio is 1: 13 slurry, enters level V counter flow washing device again.
The slurries ratio that enters level V counter flow washing device is 1: 13 a slurry, after level V extrusion filter structure squeezes filter, squeeze 70% filtrate that leaches, its concentration is 0.45%, enter filtrate well heater 21 by pipe connecting 17, after carrying out heat exchange, give third stage counter flow washing device through pipe connecting 16 and 9 sprays of tertiary circulation type jet pipe.Quantitatively replenish through the ring-like jet pipe 13 of pipe connecting 94 and Pyatyi by clear water heating tank 34 then to hot water, and by at the corresponding levels hand over molten displacement mechanism mixing after, formation slurries ratio is 1: 13 a slurry, enters the 6th grade of counter flow washing device again.
The slurries ratio that enters the 6th grade of counter flow washing device is 1: 13 a slurry, after the 6th grade of extrusion filter structure squeezes filter, squeeze 70% filtrate that leaches, its concentration is 0.13%, enter filtrate well heater 20 by pipe connecting 19, after carrying out heat exchange, give fourth stage counter flow washing device by pipe connecting 18 and ring-like jet pipe 11 sprays of level Four.And squeeze the slurry of diafiltration after clean through the corresponding levels, wherein a ton slurry finally contains non-cellulose material residual quantity and has only 0.05%.Realized that extraction rate of black liquor reaches more than 99%.The black liquid consistency of discharging reaches more than 16%.And, deliver to the making beating bleachery with the slurry after the crowded diafiltration only of the corresponding levels.
In above-mentioned six grades of counter flow washing processes, can monitor the temperature of slurry by temperature sensor at different levels, and adjust the lifting of slurry temperature by the speed of circulation of adjusting hot water, when if temperature is low, need to quicken the speed of circulation of hot water, to reach the purpose of intensification, when high as if temperature, need slow down the speed of circulation of hot water, to reach the purpose of cooling.Also can monitor the travelling speed of adjusting slurry, in case the packing phenomenon of slurry takes place by piling up transmitter.And monitor the operating rate of slurry by rate sensor.Simultaneously, quantitatively control the hot water of replenishing for level V counter flow washing device by flow director, control the flow of hot water again by flow director, to guarantee heat exchange temperature in the filtrate well heater, by the liquid level in the upper and lower limit level sensor control container for storing liquid, thereby can realize continuous, the reverse multistage washing of automatic control.
Claims (6)
1, a kind of pulp washing black liquor concentrating unit, it is characterized in that the counter flow washing device is by in the housing (5) of being with thermal insulation layer and the interior setting thereof, the head of subordinate, the counter flow washing device that tail is connected constitutes, every grade of counter flow washing device comprises extrusion filter structure and the molten displacement of the friendship mechanism two portions that are communicated with it, and first step counter flow washing device is handed over molten displacement mechanism by the one-level that is positioned at housing (5) and be communicated with and be positioned at the outer slurry conveying extrusion filter structure (40) of housing (5) with it and form, and every grade of counter flow washing device is provided with accumulation transmitter (49), temperature sensor (50) and rate sensor (68), by annotating, return water pipe (93), (37) the filtrate well heater (21) that is communicated with clear water heating tank (34) respectively, (20), (26), (27), again respectively by magnetic valve (85), (86), (87), (88) be connected with each corresponding stage counter flow washing device of counter flow washing device, and filtrate well heater (21), (20), (26), (27) also be communicated with vacuum tank (28) and compressed air tank (29) by corresponding solenoid valve respectively.
2, pulp washing black liquor concentrating unit as claimed in claim 1 is characterized in that the counter flow washing device that upper and lower level initial and end is connected is the 2-12 level.
3, pulp washing black liquor concentrating unit as claimed in claim 1, it is characterized in that every grade of counter flow washing device is by fluted disc (63), it is by being connected with propulsion source machine (6) with its gear that is meshed (62), be connected with fluted disc sleeve (71) on the fluted disc (63) and have the chassis (56) that filtrate discharge is gone up (67), chassis (56) is provided with and hands over the plasma discharge material hole (55) of molten displacement mechanism connection, and the filtrate channel (82) that is communicated with filtrate relief outlet (67), (83) and converge filtrate channel (84), on fluted disc sleeve (71), be set with the interior filter cylinder (72) that links to each other with chassis (56), on interior filter cylinder (72), be set with the Inner filter net (73) that is connected with chassis (56) successively, outer leaching net (52) and outer filter cylinder (51), interior, outer leaching net (73), (52) space that forms between is for squeezing filter position, should squeeze and be provided with the crowded filter (53) of the tapered spiral that links to each other with fluted disc sleeve (71) in the filter position, constitute the extrusion filter structure, bucket (61) is connected the below of fluted disc (63) in the mixing, in mixing, be set with bucket (60) outside the mixing on the bucket (61), in mixing, outer bucket (61), (60) be provided with vortex mixer in the cavity that forms between, constitute the molten displacement of friendship mechanism, and vortex mixer is by last, following layout is connected in the mixing bucket (61) and goes up and be " ∨ " type and fall " ∧ " type mixing plate (58), (59) and mixing tooth plate (7) form.
4, pulp washing black liquor concentrating unit as claimed in claim 1, it is characterized in that slurry conveying extrusion filter structure is by the slurry transport tube of bringing hopper (43) into, be provided with spiral pusher (46) in it, it is sleeved on the propelling movement axle (45) that connects the propulsion source machine, and the slurry transport tube is made up of upper and lower two semicircular cylinders (75), (42), and second cylinder (42) is netted, locates to be provided with the concentrated black liquid reservoir (41) of being with leakage fluid dram (39) and to constitute in netted second cylinder (42).
5, pulp washing black liquor concentrating unit as claimed in claim 4 is characterized in that spiral pusher (46) is a chorate, and the spacing contraction ratio of its helix pitch from top to the end is 2: 1-5: 1.
6, pulp washing black liquor concentrating unit as claimed in claim 1, it is characterized in that the container for storing liquid (77), (78), (79), (80) that through magnetic valve (85), (86), (87), (88) are interconnected of filtrate well heater, and on each container for storing liquid, be connected with upper and lower limit level sensor (89), (90) and constitute by heater case (81) and interior setting thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520031809 CN2816013Y (en) | 2005-09-08 | 2005-09-08 | Paper-pulp washing blackliquid concentration device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520031809 CN2816013Y (en) | 2005-09-08 | 2005-09-08 | Paper-pulp washing blackliquid concentration device |
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| CN2816013Y true CN2816013Y (en) | 2006-09-13 |
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| CN 200520031809 Expired - Fee Related CN2816013Y (en) | 2005-09-08 | 2005-09-08 | Paper-pulp washing blackliquid concentration device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353626A (en) * | 2010-09-30 | 2012-02-15 | 北京碧水源科技股份有限公司 | Device and method for measuring clear water flux of hollow-fiber membrane |
| CN102704304A (en) * | 2012-05-04 | 2012-10-03 | 宫保和 | Automatically maintained and automatically controlled long-term safe operation device for concentrating paper pulp-washing black liquor |
| CN111424452A (en) * | 2020-06-01 | 2020-07-17 | 河南大学 | Vertical paper pulp washing black liquor reverse circulation concentration equipment |
| CN111485439A (en) * | 2020-06-01 | 2020-08-04 | 河南大学 | Reverse circulation washing method for fiber pulp |
-
2005
- 2005-09-08 CN CN 200520031809 patent/CN2816013Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353626A (en) * | 2010-09-30 | 2012-02-15 | 北京碧水源科技股份有限公司 | Device and method for measuring clear water flux of hollow-fiber membrane |
| CN102704304A (en) * | 2012-05-04 | 2012-10-03 | 宫保和 | Automatically maintained and automatically controlled long-term safe operation device for concentrating paper pulp-washing black liquor |
| CN102704304B (en) * | 2012-05-04 | 2014-06-18 | 宫保和 | Automatically maintained and automatically controlled long-term safe operation device for concentrating paper pulp-washing black liquor |
| CN111424452A (en) * | 2020-06-01 | 2020-07-17 | 河南大学 | Vertical paper pulp washing black liquor reverse circulation concentration equipment |
| CN111485439A (en) * | 2020-06-01 | 2020-08-04 | 河南大学 | Reverse circulation washing method for fiber pulp |
| CN111424452B (en) * | 2020-06-01 | 2021-03-02 | 河南大学 | Vertical paper pulp washing black liquor reverse circulation concentration equipment |
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