Ceramic slurry dewatering equipment and operation method thereof
阅读说明:本技术 陶瓷泥浆脱水设备及其操作方法 (Ceramic slurry dewatering equipment and operation method thereof ) 是由 *** 林庆生 于 2019-12-19 设计创作,主要内容包括:本发明涉及压滤机技术领域,特别是一种陶瓷泥浆脱水设备;包括机架、压紧装置、隔膜滤板组件,浆料管、脱水管和高压介质管,隔膜滤板组件和压紧装置安装在机架上,隔膜滤板组件包含多个隔膜滤板,浆料管和脱水管的一端分别与隔膜滤板组件相连接,每个隔膜滤板通过一条支管与所述高压介质管相连通,所述支管上安装有阀门A;采用本发明的脱水设备对陶瓷浆料进行脱水,得到的泥饼的含水量约为14%~16%,而现有压滤机压榨后得到的泥饼的含水率一般高于18%,从而为陶瓷泥饼后续干燥的过程,节约了大量的热量;另外,采用本发明的脱水设备能制动完成卸料,且卸料速度快,提高了生产效率。(The invention relates to the technical field of filter presses, in particular to a ceramic slurry dewatering device; the device comprises a rack, a pressing device, a diaphragm filter plate assembly, a slurry pipe, a dewatering pipe and a high-pressure medium pipe, wherein the diaphragm filter plate assembly and the pressing device are installed on the rack; the dehydration equipment is adopted to dehydrate the ceramic slurry, the water content of the obtained mud cake is about 14-16%, and the water content of the mud cake obtained after the squeezing of the existing filter press is generally higher than 18%, so that a large amount of heat is saved for the subsequent drying process of the ceramic mud cake; in addition, the dewatering equipment can brake to finish unloading, has high unloading speed and improves the production efficiency.)
1. The utility model provides a pottery mud dewatering equipment, includes frame, closing device, diaphragm filter plate subassembly, thick liquid pipe, dehydration pipe and high-pressure medium pipe, diaphragm filter plate subassembly with closing device installs in the frame, diaphragm filter plate subassembly contains a plurality of diaphragm filter plates, the thick liquid pipe with the one end of dehydration pipe is connected its characterized in that with diaphragm filter plate subassembly respectively: each diaphragm filter plate is communicated with the high-pressure medium pipe through a branch pipe, and a valve A is installed on each branch pipe.
2. The ceramic mud dewatering apparatus of claim 1, wherein: the dehydration equipment further comprises a vacuum dehydration tank, the vacuum dehydration tank comprises a sealed tank body and a vacuum pump, the vacuum pump is connected with the sealed tank body through a pipeline, a valve B is arranged on the pipeline close to the sealed tank body, and the tail end of the dehydration pipe is provided with a valve J and is connected with the upper side of the sealed tank body.
3. The ceramic slurry dewatering apparatus of claim 2, wherein: the dewatering equipment further comprises a slurry tank, the slurry pipe is connected with the upper portion of the slurry tank, a valve C and a valve D are arranged on the slurry pipe, a discharge pipe is arranged at the bottom of the slurry tank, a valve E and a slurry pump are sequentially installed on the discharge pipe, and the other end of the discharge pipe is communicated with the slurry pipe between the valve C and the valve D.
4. The ceramic slurry dewatering apparatus of claim 3, wherein: the dewatering equipment further comprises a water tank, the high-pressure medium pipe is connected with the upper portion of the water tank, a valve F and a valve G are arranged on the high-pressure medium pipe, a water outlet pipe is arranged at the bottom of the slurry tank, a water pump and a valve H are sequentially mounted on the water outlet pipe, and the other end of the water outlet pipe is communicated with the high-pressure medium pipe between the valve F and the valve G.
5. The ceramic slurry dewatering apparatus of claim 4, wherein: the tail end of the slurry pipe is provided with an air inlet pipe, and a valve I is arranged on the air inlet pipe.
6. A method of operating a ceramic slurry dewatering apparatus as claimed in claim 5, characterised in that: the method comprises the following steps:
step S1: starting a pressing device to press the diaphragm filter plate component;
step S2: opening the valve D and the valve E, starting a slurry pump, and injecting slurry into the diaphragm filter plate assembly;
step S3: after grouting, closing the valve E and the slurry pump, opening the valve B and the valve J, starting the vacuum pump to vacuumize the sealed tank body, simultaneously opening the valve F and the valve H, starting the water pump, injecting water into the diaphragm filter plate, and squeezing the slurry;
step S4: after squeezing is completed, closing the valve B, the valve J and the vacuum pump, opening the valve C and the valve I, injecting high-pressure air into the slurry pipe, and blowing the residual slurry in the slurry pipe back into the slurry tank; after blowing is finished, closing the valve C, the valve D and the valve I;
step S5: closing the valve H and the water pump, opening the valve G, and releasing pressure;
step S6: after the pressure relief is finished, closing the valve A and the valve G;
step S7: sequentially loosening the plates, starting a water pump and opening a valve H, opening a valve A corresponding to a diaphragm filter plate when one diaphragm filter plate is loosened, filling water with certain pressure into the diaphragm filter plate, and discharging;
step S8: and after the unloading is finished, the water pump is stopped, the valve G is opened, the pressure is relieved again, and finally the valve F and the valve G are closed.
7. The method of operating a ceramic slurry dewatering apparatus as recited in claim 6, further comprising: the pressure of the water charged in the step S7 is 0.2MPa to 0.5 MPa.
Technical Field
The invention relates to the technical field of filter presses, in particular to ceramic slurry dewatering equipment and an operation method thereof.
Background
The filter press is a device for performing solid-liquid separation on materials through pressure filtration, is widely applied to industries such as food, chemical industry, environmental protection, sewage treatment and the like, and particularly has unique superiority on separation of fine and viscous substances. For example, pugs for the production of ceramic tiles, need to be subjected to a dehydration treatment.
A common filter press generally includes a frame, on which an oil press and a membrane filter plate assembly are mounted, a slurry pipe, a dewatering pipe and a high-pressure medium pipe are respectively connected with the membrane filter plate assembly, the membrane filter plate assembly mainly includes a filter plate and a membrane, and the membrane is disposed on the filter plate. The slurry pipe is used for conveying slurry to be dehydrated into the squeezing cavity of the diaphragm filter plate assembly; the dewatering pipe is communicated with the squeezing cavity and is used for discharging waste liquid discharged in the process of squeezing the pulp; and a diaphragm is arranged in each squeezing cavity, a high-pressure medium is introduced into the high-pressure medium pipe, and the high-pressure medium blows the diaphragm to squeeze the slurry in the squeezing cavities, so that water in the slurry is discharged through squeezing to obtain a mud cake. The high-pressure medium is generally water in the process of actual use.
At present, although the existing filter press can remove partial water from the slurry, the existing filter press has the following problems:
1. the mud cake after filter pressing has high water content, the water content of the mud cake after filter pressing by the existing filter press is more than 18 percent, the water content is high, and the mud cake with high water content needs to further consume a large amount of energy in subsequent drying;
2. after the squeezing is finished, the mud cake is not easy to fall off from the filter plate; in the squeezing process, the mud cakes are squeezed to be tightly combined with the inner side wall of the filter plate, so that after the diaphragm filter plate assembly is opened, the mud cakes are easily clamped in the filter plate, workers need to break the mud cakes with hands or beat the mud cakes with tools to make the mud cakes fall off, and the unloading speed of the equipment is low.
In order to solve the problem of high water content, chinese patent application CN110025996A discloses a plate and frame rail press with good press filtration effect, which provides the following technical solutions: through setting up first inlet channel, first inlet channel is linked together with the punishment in advance passageway, and the punishment in advance passageway closes feed valve after the mud cake forms, opens the relief valve and carries out the pressure release, empties the thick liquids on the punishment in advance passageway, then lets in highly-compressed air in first inlet channel, and highly-compressed air passes the mud cake from the punishment in advance passageway and discharges from the delivery port again, and the moisture on the mud cake is taken away in the in-process that highly-compressed air flows to further reduce the moisture content of mud cake. Although the water content of the mud cake can be further reduced by the technical scheme, the diaphragm can be blown up when the high-pressure air acts on the diaphragm due to the adoption of the high-pressure air, the rupture of the diaphragm is accelerated, and the service life of the diaphragm is shortened by more than 50% during actual production.
Therefore, there is a need for further improvements in filter presses and processes for producing the same to further increase dewatering efficiency and discharge rate.
Disclosure of Invention
The invention provides a ceramic slurry dewatering device for solving the problems of higher water content and low discharging speed of a mud cake pressed by the existing filter press.
In order to achieve the functions, the technical scheme provided by the invention is as follows:
the utility model provides a pottery mud dewatering equipment, includes frame, closing device, diaphragm filter plate subassembly, thick liquid pipe, dehydration pipe and high-pressure medium pipe, diaphragm filter plate subassembly with closing device installs in the frame, diaphragm filter plate subassembly contains a plurality of diaphragm filter plates, the thick liquid pipe with the one end of dehydration pipe is connected with diaphragm filter plate subassembly respectively, every diaphragm filter plate through a branch pipe with high-pressure medium pipe is linked together, install valve A on the branch pipe.
Preferably, the dehydration equipment further comprises a vacuum dehydration tank, the vacuum dehydration tank comprises a sealed tank body and a vacuum pump, the vacuum pump is connected with the sealed tank body through a pipeline, a valve B is arranged on the pipeline close to the sealed tank body, and the tail end of the dehydration pipe is provided with a valve J and is connected with the upper part of the sealed tank body.
Preferably, the dewatering equipment further comprises a slurry tank, the slurry pipe is connected with the upper portion of the slurry tank, the slurry pipe is provided with a valve C and a valve D, the bottom of the slurry tank is provided with a discharge pipe, the discharge pipe is sequentially provided with a valve E and a slurry pump, and the other end of the discharge pipe is communicated with the slurry pipe between the valve C and the valve D.
Preferably, the dewatering equipment further comprises a water tank, the high-pressure medium pipe is connected with the upper portion of the water tank, a valve F and a valve G are arranged on the high-pressure medium pipe, a water outlet pipe is arranged at the bottom of the slurry tank, a water pump and a valve H are sequentially installed on the water outlet pipe, and the other end of the water outlet pipe is communicated with the high-pressure medium pipe between the valve F and the valve G.
Preferably, the tail end of the slurry pipe is provided with an air inlet pipe, and the air inlet pipe is provided with a valve I.
The invention also provides an operation method of the ceramic slurry dewatering equipment, which comprises the following steps:
step S1: starting a pressing device to press the diaphragm filter plate component;
step S2: opening the valve D and the valve E, starting a slurry pump, and injecting slurry into the diaphragm filter plate assembly;
step S3: after grouting, closing the valve E and the slurry pump, opening the valve B and the valve J, starting the vacuum pump to vacuumize the sealed tank body, simultaneously opening the valve F and the valve H, starting the water pump, injecting water into the diaphragm filter plate, and squeezing the slurry;
step S4: after squeezing is completed, closing the valve B, the valve J and the vacuum pump, opening the valve C and the valve I, injecting high-pressure air into the slurry pipe, and blowing the residual slurry in the slurry pipe back into the slurry tank; after blowing is finished, closing the valve C, the valve D and the valve I;
step S5: closing the valve H and the water pump, opening the valve G, and releasing pressure;
step S6: after the pressure relief is finished, closing the valve A and the valve G;
step S7: sequentially loosening the plates, starting a water pump and opening a valve H, opening a valve A corresponding to a diaphragm filter plate when one diaphragm filter plate is loosened, filling water with certain pressure into the diaphragm filter plate, and discharging;
step S8: and after the unloading is finished, the water pump is stopped, the valve G is opened, the pressure is relieved again, and finally the valve F and the valve G are closed.
Preferably, the pressure of the water filled in the step S7 is 0.2MPa to 0.5 MPa.
The invention has the beneficial effects that:
1. the valves A are arranged on the branch pipes of the membrane filter plates, when the filter press discharges materials, when one membrane filter plate is loosened, the valve A corresponding to the membrane filter plate is opened, water with certain pressure is filled into the membrane filter plate, the membrane is expanded, and mud cakes in the cavities of the membrane filter plates are extruded out of the membrane filter plate by the expanded membrane, so that automatic discharging is realized;
2. the vacuum tank is arranged at the front end of the dewatering pipe, so that the air pressure in the cavity of the diaphragm filter plate is reduced, pressure difference is formed outside the cavity, the discharge of water in slurry is facilitated, the vacuum efficient dewatering is realized, and the water content of a dewatered mud cake is lower than that of the existing mud cake by more than 2%.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The invention will be further elucidated with reference to the accompanying drawing 1:
as shown in fig. 1, the ceramic slurry dewatering device comprises a frame 1, a
One ends of the
The dewatering equipment also comprises a
The
The
The high-
The tail end of the
In the valve according to the present embodiment, the other valves are normally closed except that the valve A8 is normally open.
The invention also provides an operation method of the ceramic slurry dewatering equipment, which comprises the following steps:
step S1: starting the
step S2: opening the valve D16 and the valve E17, starting the
step S3: after the grouting is finished, closing the valve E17 and the
step S4: after squeezing is completed, closing the valve B12, the valve J13 and the
step S5: the valve H24 and the
step S6: after the pressure relief is finished, closing the valve A8 and the valve G22;
step S7: loosening the plates in sequence, starting the
step S8: after the unloading is finished, the
The dehydration equipment provided by the invention is used for dehydrating ceramic slurry, the water content of the obtained mud cake is about 14% -16%, and the water content of the mud cake obtained after squeezing by the existing filter press is generally higher than 18%, so that a large amount of heat is saved for the subsequent drying process of the ceramic mud cake. In addition, the dewatering equipment can brake to finish unloading, has high unloading speed and improves the production efficiency.
The above-described embodiments are merely preferred examples of the present invention, and not intended to limit the scope of the invention, so that equivalent changes or modifications in the structure, features and principles of the invention described in the claims should be included in the claims.
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