CN1101448C - Plant filter press and controlling device for reducing water content in solid and/or slurry materials - Google Patents
Plant filter press and controlling device for reducing water content in solid and/or slurry materials Download PDFInfo
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- CN1101448C CN1101448C CN97113930A CN97113930A CN1101448C CN 1101448 C CN1101448 C CN 1101448C CN 97113930 A CN97113930 A CN 97113930A CN 97113930 A CN97113930 A CN 97113930A CN 1101448 C CN1101448 C CN 1101448C
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Abstract
The invention relates to a method, a press, and a control device for reducing the capillary-bound water content in fiber cells of carbon-containing, finely comminuted solid materials and/or sludges. The method according to the invention includes rapidly raising the movable press plate of a filter press while the pressure chamber remains closed. A steam-coal dust mixture is formed due to the rapid expansion. At the same time, a first discharge lock is opened while the second discharge lock remains closed so that the exhaust steam flows in the direction of the controlled outlet valve. The exhaust steam can then be sent to a heat exchanger and then to another heat exchanger and, finally, may be reused for a subsequent operating cycle.
Description
The present invention relates to a kind of processing method and pressure filter, in order to reduce owing to capillary action condenses in carbonaceous material and the water content of solid material in small, broken bits and/or the water content of slurry in the fiber chamber.
The present invention has proposed a kind of novel method by patent DE195 35 315.3, by heat-mechanical means, and can be so that give birth to the brown coal dehydration large-scale industrial being applied.This method can be improved the total efficiency of power station generating, and can handle a large amount of coal solid materials that contain continuously.For avoiding under the vapor pressure effect, stockpile layer edge blown off, and heat energy is evenly distributed on the compressing surface, and do not reduce vapor pressure on the edge, equipment and pressure filter that present method is used are further solved technically, thereby are no longer produced above-mentioned defect.
Present method is formed by following combination of process steps:
When a) work tempo begins, raw material be contained in one closed, gastight, temperature surpasses 100 ℃ and in the pressure chamber of preheating basically, infeeds the superheated vapour of temperature 〉=150 ℃ then.At this moment,
B) act on compression pressure on the raw material,, the most approximately be equivalent to 5 and cling to 8 crust delivering vapor pressure greater than formed pressure during loose density in the material.Then,
C) temperature when institute's package material reaches 〉=125 ℃ approximately, spray vapour end-of-job.According to the feedstock particle size of throwing in, impose the high mechanical unit pressure that is up to 75 crust, dewater, make residual water content reduce to 20% of weight.
According to patent DE195 35 315.3, successfully make heat and mechanical energy consumption few with hot mechanical dehydration method, reach and remove brown coal moisture content purpose economically.Thereby, concerning the power station uses the high humidity brown coal, because evaporation less energy consumption of the present invention can make total efficiency obtain obviously to improve.In addition, compare, saved the water vapor energy with the heated drying method of knowing.
According to patent DE195 35 315.3, the used equipment of technological process is, the cloth strip of circular flow passes the pressure chamber that is combined in the first class pressure machine, and the pressure chamber is by a gate system, gathers order according to the press process joint and is opened and closed.The major parts of equipment is switchable by one, the material distributing machine of non-stop run and the pressure filter that can be interrupted heating, and the strip case system in order to load the particle brown coal that has the rectangle cross section forms.Circulating cloth has two annular side steel bands.The sealing and passing in the steam-tight pressure chamber from press circulatingly of cloth strip, and when entrance and exit place that is in the pressure chamber and delivery direction quadrature, by one can lifting flashboard and a locking flashboard close and open the pressure chamber.End by means of steam thermal energy input, mechanical draining, the secondary process of this hot mechanical dehydration just makes the dry brown coal compacting stockpiles (being not only coal or residual moisture) in the closed pressure chamber power that is in pressure filter absorb the temperature of steam, that is to say, under the high-speed motion of pressing plate, hurried ground of residual moisture direct evaporation has become steam.But problem just is, according to temperature (125 ℃ to 200 ℃, vapor pressure is approximately to 20 crust) situation, when press is taken out (coming true) sky, must control the remaining wet steam of discharging.When the pressure chamber closed, during promptly by hydraulicefficiency governing dividing plate and closed shutter, last presspahn moved fast, and remaining humidity is to discharge with vapor form in the dehydration brown coal plate.If opening of presspahn is slowly, be about 200 ℃ and about 16 vapor pressures that cling to according to the coal temperature, need the reduced steam in the underpressure chamber is controlled, so just has a shortcoming, when promptly discharging reduced steam, must suitably passage or conduit be set for high pressure steam through corresponding exhaust passage.In nip region, nothing left vapour is got rid of, and in the zone that pressure filter is discharged, has formed a large amount of waste vapour, and it will be discharged through additional withdrawing device with through expensive wet cleaning apparatus.Because of heat/mechanical dehydration process is discontinuous carrying out, finishes formed waste vapour amount (waste vapour is the mixture of water vapor and coal dust) here at each pressing cycle and must discharge by additional wet cleaning apparatus.When the pressure filter emptying,, only be to finish being about in 5% to 10% short period of total cycle time so absorption adds the discontinuous dust amount of formation.In other words, will get rid of with respect to the dust amount that occur such blink, then require dust suction and dust exhaust that enough sizes must be arranged, this just needs very high investment cost.Other shortcoming is that the waste vapour that is drawn out of also is a kind of heat-energy losses.
The objective of the invention is to, a kind of method and apparatus is provided, according to the method with utilize this device, after mechanical compaction finishes, the major part that remains in the brown coal plate that took off water remains moisture by before the emptying in the pressure chamber, does not need expensive air extractor to be discharged with regard to can be used as reduced steam.The heat of residue in the moisture also can be used as additional heat and is utilized.
This purpose is achieved like this: provide a kind of be used for reducing because of capillary action condense in carbonaceous material and the solid material in small, broken bits and/or the method for the water content in the slurry in the fibrous tissue, it may further comprise the steps: (a) affact on the material to be drained off by heat energy and pressure, at this moment, heat energy of being made up of superheated vapour and mechanical energy are transported to a pressure chamber as surface pressure, to compressing dehydration on the material; When (b) work begins, material is to be in airtight basically a, preheating temperature to surpass in 100 ℃ the pressure chamber, the superheated vapour that feeds temperature 〉=150 ℃ then evaporates material moisture content, at this moment the densification pressure that affacts on the material is greater than or equal to the formed pressure of material loose density, and maximum is equivalent to the delivering vapor pressure of 5-8 crust; (c) when the temperature in the material reach 〉=125 ℃ after, spray vapour finishes, granular size according to material, impose the squeeze of high mechanical unit, maximum can reach 75 crust, and its effect can make remaining moisture and reduce to 20% of weight, is characterized in that it is further comprising the steps of: formed surplus steam continued decompression after (d) pressure filter was opened in underpressure chamber next to be opened, by control, enter into a steam condenser by the steam that comes out in the underpressure chamber to decompression rate.A kind of pressure filter is provided, it has one and places the pressure filter back and pass through the underpressure chamber that latching member is connected with the pressure chamber, described underpressure chamber is connected with a waste heat condenser through the control outlet valve, this underpressure chamber is by another latching member during by strip, and the remaining flue gas in the brown coal plate that took off water that previous work tempo produced is fully sealed up.
Because the fast rise of presspahn, when the pressure chamber opens rapidly, can bring two conclusive advantages: because vapor expansion speed height, formed lower vapor pressure in that reduced steam is indoor, and by high decompression rate, the brown coal plate (dry brown coal compacting stockpile) that took off water makes coal cinder released because of the strike of volatile reduced steam pressure, promptly, the brown coal plate becomes and is equivalent to original graininess for pine is in small, broken bits, this is very useful to later pulverizing, because can make the pan mill size little, make machine cost lower thus.The basic thought of theory of the present invention is, also be drained into a Water storage condenser system conditionally based on the steam heat recycle, be used because the heat that gathers can be transferred into again in total effective cycle time again through one or more heat exchange systems.For example, be used for heating to the entire equipment room air, to heating through the air of exsiccant again of dehydration and dry brown coal plate, and to the heating of combustion air in the combustion chamber or to the heating of turbine recirculated water.Except surplus vapour contain heat energy be utilized, also special because continuous combination of discharging between the heat in cycling hot that discharge the vapor condensation chamber and the additional heat exchanger, ratio on time flow is 10 to 1, thereby make and brought special benefit economically, it is minimum that its equipment cost is dropped to, and it equally also is 10 to 1 that cost reduces ratio.
Other advantage of the present invention is illustrated by following illustration and appending claims.
Fig. 1 shows pressure filter of the present invention, and it comprises: dress is given birth to brown Paniculate coal device, steam brake door system and is connected the steam condenser-heat exchange system in downstream;
Fig. 2 is the C-C sectional view of Figure 12, is the another kind of modification of Fig. 6 and Fig. 7 gate system;
Fig. 3 shows the situation of the C-C sectional view of Figure 12, but end has mechanical sealing member, is used for extruding hot water;
Fig. 4 shows the surplus vapour decompression of pressure filter reduced steam chamber when opening vapor cock;
Fig. 5 is the B-B sectional view of Fig. 2, shows the configuration of cylinder shape valve;
Fig. 6 shows the surplus vapour-gate system in pressure filter exit, and mechanical compression unit is terminal similar to Fig. 3;
Fig. 7 shows surplus vapour-gate system of Fig. 6, and wherein the Fast Compression plunger is similar to Fig. 4, and the gate II that opens is similar to the outlet plunger of Fig. 4;
Fig. 8 shows the another kind of structure of Fig. 2 and surplus vapour-gate system shown in Figure 6;
Steam decompression situation when Fig. 9 shows the pressure chamber and opens;
Figure 10 is the A-A sectional view of Fig. 8, has wherein opened elongated slot on the next door;
Figure 11 shows the side-view of the pressure filter that has gate I, II and III;
Figure 12 is the E-E sectional view of Figure 11, and wherein pressure filter has the wall of gate I, II and III and hydraulic efficiency starting;
Figure 13 is that the mode with the F-F sectional view of Figure 12 shows all gate I, II and III opens and the running condition of the discharging of pressure chamber and charging beginning;
Figure 14 shows Figure 13 end of processing pressure filter charging situation not long ago.
Fig. 1 shows theme of the present invention, and it comprises with heat-mechanical process removes the equipment of giving birth to granular brown coal moisture content, and it comprises:
A) be with on 4 in bulk coalingging, be interrupted in bulk section that feeds;
B) has the individual layer pressure filter 5 of integral type pressure chamber and gate system;
C) and then be to pulverize drying installation, extrude brown coal plate 31 and from pressure chamber 40 (having thing crushing device 74), come out.
In bulk section A of Fig. 1 shows visually, will give birth to granular brown coal 6 and be input to fixedly coal bunker 1 continuously through travelling belt 2.The fixedly cloth of forming a structural unit with coal bunker 1 is sprinkling upon cloth-coaling and be with on 4 giving birth to granular brown coal 6, and strip is by pressure filter 5 circular flows.Cloth-filling band system (also visible Figure 11 and Figure 12) by in following circulating strip 4 and the pressure filter two vertically, about the dividing plate 63 that is fixed on the strip formed.Strip 4 is a kind of gas-pervious metal object ribbons, circular flow in the pressure chamber 40 of pressure filter 5.Give birth to granular brown coal 6 and be dispersed on the strip by material distributing machine 3, reach H up to material stack height, the cross section of stockpile is accurate rectangle.And then enter pressure chamber 40 according to a kind of like this shape, the output of repressed back.The charging of the granular brown coal one separated material bed of next stage be with strip 4 on the granular brown coal of life-separated material bed charging and carry out simultaneously by brown coal plate 31 dischargings of coming out in the pressing unit.Before strip 4 is started working, open the inlet 26 and the outlet 27 of pressure chamber 40, make dividing plate 63 decompressions of pressure chamber 40, promptly be free state.Numerical control device by strip 4 is given birth to after brown lamp coal-separated material bed is delivered to outlet 27 place's strips and arrives out port strobe II, and pressure chamber 40 closes again, and dividing plate 63 depends on up (the about 5mm of clamping stroke) again in other words, and enters the mouth 26 and export 27 and close again.
As shown in the figure, the pressure filter that has comprehensive pressure chamber and gate system 5 that is positioned at the nip B of pressure chamber scope is to be designed to a fixed single-stage upper piston formula press.Strip 4 constantly will be given birth to granular brown coal 6 and will be sent to blanketed zone, pressure chamber B from bulk section A, and should be with the following fixed heating presspahn 13 through pressure chamber 40 this moment.
In this case, described pressure chamber system is made up of following function structure body:
Be positioned at the following fixedly presspahn 13 of compacting frame 30;
On two vertical sides of presspahn 13, left and right vertical dividing plate 63 is housed respectively, they are pressed to the last presspahn 17 that drives by hydro-cylinder 34 from the side again by hydraulic pressure short distance cylinder 20;
Dividing plate 63 in pressure filter 5 promptly when the filling band transmitting moving, is finished the unloading action, and when vapo(u)r blasting and pressing process, is pressed to presspahn 17 by side pressure with hydraulic pressure short distance cylinder 20 control side surface pressures.For stoping vapor pressure, last presspahn 17 seals up by elastic caoutchouc sealing member 88.If strip 4 remains static, to pressing plate 13 time, then can pass through caoutchouc elasticity sealing member 89 by hydro-cylinder 23 to dividing plate 63 vertical depression, make dividing plate 63 reach hermetic seal again facing to the lower rim of the pressing plate 13 that has sealed up.
Along with the granular brown coal 6 of life in bulk move to pressure chamber 40, this moment, the locking gate 28 in exit 27 side by side moved vertically downward by hydraulicefficiency governing part 36, when brown coal enter into the pressure chamber, then the locking gate enters into the locked position of coupler that then will carry out vapo(u)r blasting.26 locking gate 22 moves upward with hydraulicefficiency governing part 37 always in the ingress, that is to say to be discharged into freely that can to make the cloth height be that the granular brown coal 6 of H successfully enter into pressure chamber 40.
According to the present invention, present mode of operation is by Fig. 1, and a control gate system of discharging area shown in 6 and 7, that be arranged in pressure chamber 40 finishes by job order.Its reduced steam is discharged from pressure chamber 40 serially according to the work tempo of pressure filter 5.
Its function is as follows:
40 when also being in closing condition in the pressure chamber, opens the presspahn 17 of motion rapidly, and Fig. 6 is seen in the starting position.In reduced steam chamber 81, because the loosening effect of blast has formed water vapor coal dust mixture, when pressure filter 5 cuts out, work in pressure chamber 40, and when open press filtration chamber 5, work in reduced steam chamber 81.Along with presspahn 17 beginning rapid movements, but finish at least to motion, outlet flashboard 2 is opened, and is positioned on the whole compacting width because have the port strobe II that of locking flashboard 28, thereby, can open a bigger decompression cross section in steam condenser 82 directions.When operating by Fig. 7, what have locking flashboard 90 goes out that port strobe III closes as before, and like this, surplus vapour just flows by the direction of control outlet valve 80.The opening speed that goes out port strobe II and outlet valve 80 will give control, beats with steam one speed of mobile unit when entering cross section to adapt.Avoid because too high heat flow speed enters in the vapor condensation chamber 82 a large amount of coal dusts and Paniculate coal.When opening presspahn 17 usually, going out port strobe II and vent valve 80 opens in chronological order each other and connects, stagger control like this when surplusing 93 when occurring, just can on purpose regulate the reduced steam evaporation time, the surplus vapour 93 of this time about≤10% is drained into whole cycling times of steamer 82, does not so just have a large amount of coal dusts and Paniculate coal to follow into.
The function of steam condenser system is as follows:
When reduced steam time≤10% all during cycling time, surplus vapour 93 flows into steam condensers 82.At this moment by gravity, flow out from tank 83, tank holds the heat that has suitable water and discharge to gather by steam condenser 82 above steam condenser, and for example, effusive water is 30 ℃ from water tank, and in the prolong of steam condenser 82, water temperature is 60 ℃.These water are input to heat exchanger 84, thereby brought benefit: from now on, on the time, can give other outside heat exchanger system 85 and 86 heat delivery that stores by spells in full cycle by the water that heat exchanger 84 comes out, thereby total system can be less, and is also favourable in cost.
Other advantage is, is 100 ℃ through the condensed water temperature of reduced steam, and by heat exchanger 86, energy can utilize equally, to whole steam condenser system, is connected to preposition solid particulate and separates 77; Be used for absorbing coal dust and Paniculate coal.Because decompression is to carry out condenser 82 by going out port strobe II with the big cross section of decompression gate IV, for example, 82 its pressure drops from reduced steam chamber 81 to steam condenser≤10 crust.Pressure is reduced at pressure, does not promptly need additional gas barrier.
Behind reduced steam time≤10% total cycle time, as shown in Figure 7, can open additional gate II and make pressure filter 5 emptyings with locking flashboard 90, as Figure 13 and Figure 14.
Second kind of modification is by Fig. 2,4 and 5 structure.Its function is as follows:
When coalingging by Figure 13 pressure filter 5, by sealing up to terminal from dehydration that Fig. 3 represents, the cylindrical exhaust hole 91 in hydraulic pressure dividing plate 63 is to be closing condition always.Press Fig. 2,4 and 5,20 of hydraulicefficiency governing parts, the cylindrical steam discharge hole count of arrangement is can be arbitrarily, and usually be according to number what, (shown in Figure 4) makes it can open enough big exhaust cross section (as mentioned above) when decompression phase.Compare with last a kind of scheme, the advantage of this structure is that pressure filter 5 is very long, can settle the open cross-section of respective numbers on the 40 liang of longitudinal surfaces in pressure chamber, and surplus vapour 93 is reduced pressure towards decompression gate IV.By columniform piston structure, exhaust hole 91 has the effect of self-cleaning.Decompression gate IV is attached in the system that closes plunger 92 of exhaust hole 91 again.Technical process is described with Fig. 6 and Fig. 7.
As a kind of to Fig. 2 to the modification of structure shown in Figure 5, Fig. 8,9 and 10 show another kind of modification.Its function is as follows:
The situation of coalingging of Fig. 8 is similar to shown in Figure 13, is giving birth to granular brown coal material stack height H top in other words, and the side that is positioned at adjustable hydraulic pressure dividing plate 63 has longitudinal slot 87, and in pressing process, when promptly presspahn 17 descended, longitudinal slot cut out automatically.
Fig. 9 represents the situation of reduced steam, and with presspahn 17 holes, the side longitudinal slot is opened voluntarily, and surplus like this vapour just can lead to steam condenser 82 through decompression gate IV.
Fig. 9 shows the velocity distribution of presspahn 17.When presspahn had just been opened, opening speed was regulated very highly, but when arriving notch 87, the deceleration of being obstructed suddenly of presspahn 17 speed, like this, as Fig. 6 and 7 already as described in, the controlled decompression velocity of steam on the direction of condenser 82 has just obtained adjusting.
The tightness system that is used for sealing load chamber 40 in pressure filter 5 is described below.
The processing step of reduced steam discharging, all application examples 40 are achieved round the pressure chamber.Presspahn 17 is only being given birth to the motion of brown coal and dried brown coal district.Therefore, the sidewall of presspahn 17, the side of adjustable dividing plate 63 inwalls and locking flashboard 22 and 28 are all owing to extruded material is subjected to wear and tear.Presspahn 17 constitutes slick steel body with rectangular perpendicular walls.Sealing member is arranged on the outer wall, promptly be arranged on adjustable dividing plate 63 of hydraulic pressure and entrance gate I and go out on the locking flashboard 22 and 28 of port strobe II, and on the top of hydraulic pressure adjustable wall, even presspahn 17 at quick travel position, sealing member 88 is in no eroded area all the time.On dividing plate 63 sides, be in the upper zone of dividing plate 63 facing to the sealing member 88 of presspahn 17; And facing to the sealing member 89 of press table 13, be to be in dividing plate 63 lower regions.Settle sealing member 88 and 89 like this, in the time of just passing through hydraulicefficiency governing part 20 through dividing plates 63, sealing member 88 is pressed to presspahn 17, lower seal 89 is pressed to fixed presspahn 13, thereby forms from dynamic seal.In described gate system, for example in Fig. 6 and Fig. 7, last sealing is the vertical wall of pressing to presspahn 17 by jaw closing movement mechanism 35, realizes that inferior segment seals naturally.For example with regard to pressing coal, vertically be pressed in each coal bed on by the locking flashboard 22 and 28 that have end face 94 with hydraulicefficiency governing part 36 this moment.
Claims (10)
1. one kind is used for reducing because of capillary action condenses in carbonaceous material and the solid material in small, broken bits and/or the method for the water content in the slurry in the fibrous tissue, and it may further comprise the steps:
(a) affact on the material to be drained off by heat energy and pressure, at this moment, heat energy of being made up of superheated vapour and mechanical energy are transported to a pressure chamber as surface pressure, compressing dehydration on the material;
When (b) work begins, material is to be in airtight basically a, preheating temperature to surpass in 100 ℃ the pressure chamber, the superheated vapour that feeds temperature 〉=150 ℃ then evaporates material moisture content, at this moment the densification pressure that affacts on the material is greater than or equal to the formed pressure of material loose density, and maximum is equivalent to the delivering vapor pressure of 5-8 crust;
(c) when the temperature in the material reach 〉=125 ℃ after, spray vapour finishes, according to the granular size of material, impose the squeeze of high mechanical unit, maximum can reach 75 crust, and its effect can make remaining moisture and reduce to 20% of weight, it is characterized in that it is further comprising the steps of:
(d) formed surplus steam continued decompression after pressure filter was opened in underpressure chamber next to be opened, by the control to decompression rate, entered into a steam condenser by the steam that comes out in the underpressure chamber.
2. the method for claim 1, it is characterized in that, it is further comprising the steps of: formed surplus steam heat is transported to the retaining condenser system after each working cycle, enters into one or more heat exchange systems again at this accumulative heat, comes out thus further to be used again.
3. method as claimed in claim 2, it is characterized in that, the surplus steam heat that is produced is to enter into first retaining condenser system discontinuously, be equivalent to 10% of time work period, and the heat of first retaining condenser system is to enter into second retaining condenser system continuously.
4. the method for claim 1 is characterized in that, described solid material is to give birth to brown coal.
5. pressure filter that is used for implementing as method as described in one or more claims in the claim 1 to 3, it is characterized in that, it has a underpressure chamber (78) that places pressure filter (5) back and be connected with pressure chamber (40) by a latching member (28), described underpressure chamber is connected with a waste heat condenser (82) through control outlet valve (80), this underpressure chamber is by another latching member (90) during by strip (4), and the remaining flue gas in the brown coal plate (31) that took off water that previous work tempo produced is fully sealed up.
6. pressure filter as claimed in claim 5 is characterized in that, dividing plate (63) has cylindrical and/or orthogonal opening or notch at its first half, can seal circular row pore (91) by slot plug (92).
7. as claim 5 or 6 described pressure filter, it is characterized in that each limit of the presspahn of motion (17) is made into slick steel body by vertical wall.
8. as claim 5 or 6 described pressure filter, it is characterized in that the groove of dividing plate (63) is built-in with sealing member (88,89), the sealing member that is in the district seals up portable plate (17), and the sealing member that is in inferior segment seals up fixedly presspahn (13).
9. pressure filter as claimed in claim 5, it is characterized in that, it has a regulating and controlling device, enter underpressure chamber (78) and come out thus and enter into the steam flow speed of waste heat condenser (82) by the gate (IV) that reduces pressure in order to control surplus vapour (93), dividing plate (63), latching member (28), exhaust slot plug (92) and drain tap (80) all can be controlled on their opening speeds.
10. pressure filter as claimed in claim 5, it is characterized in that, it has a regulating and controlling device, the acceleration of pressing plate (17) promotes, goes out the unlatching of port strobe (11) and opening of drain tap (80), be in time stagger in order each other anastomosing, thereby make that the drain time of afterheat steam (93) is controlled in the reduced steam chamber (81)≤whole cycle time 10%.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19710711A DE19710711A1 (en) | 1995-09-22 | 1997-03-14 | Lignite dewatering under mechanical pressure, aided by superheated steam |
| DE19710711.7 | 1997-03-14 | ||
| US08/822,945 US5887514A (en) | 1995-09-22 | 1997-03-21 | Method, filter press and control device for reducing the water content of solid materials and/or sludges |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1193652A CN1193652A (en) | 1998-09-23 |
| CN1101448C true CN1101448C (en) | 2003-02-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97113930A Expired - Fee Related CN1101448C (en) | 1997-03-14 | 1997-06-16 | Plant filter press and controlling device for reducing water content in solid and/or slurry materials |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1101448C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100371047C (en) * | 2005-08-19 | 2008-02-27 | 胡杭虎 | Strong filter press |
| CN110368723A (en) * | 2019-08-19 | 2019-10-25 | 鄂尔多斯市中钰泰德科技有限公司 | A kind of thin material dewatering unit of novel energy-saving high-efficiency |
| CN113577904A (en) * | 2021-08-20 | 2021-11-02 | 湖北万众通达机械设备有限公司 | Coal mine environment-friendly sludge filter pressing equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4810257A (en) * | 1985-04-26 | 1989-03-07 | Institute Of Gas Technology | Mechanical dewatering process |
-
1997
- 1997-06-16 CN CN97113930A patent/CN1101448C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4810257A (en) * | 1985-04-26 | 1989-03-07 | Institute Of Gas Technology | Mechanical dewatering process |
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| CN1193652A (en) | 1998-09-23 |
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