CN218120531U - Steam drying system of nanometer calcium carbonate filter cake - Google Patents
Steam drying system of nanometer calcium carbonate filter cake Download PDFInfo
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- CN218120531U CN218120531U CN202222446920.9U CN202222446920U CN218120531U CN 218120531 U CN218120531 U CN 218120531U CN 202222446920 U CN202222446920 U CN 202222446920U CN 218120531 U CN218120531 U CN 218120531U
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Abstract
The utility model discloses a steam drying system of nanometer calcium carbonate filter cake, including drying chamber (2), be equipped with stoving guipure (21) in drying chamber (2), the top and the below of stoving guipure (21) all are equipped with hot air flue (22), are equipped with in hot air flue (22) and steam heat exchange tube (23) of being connected with steam preparation system (4) circulation, and the air outlet of hot air flue (22) is towards stoving guipure (21); the top of drying chamber (2) is equipped with the hydrofuge mouth, is equipped with discharge valve (25) in the hydrofuge mouth, and the inlet connection of hydrofuge mouth and waste heat recovery device (3), the delivery port of waste heat recovery device (3) and the inlet connection of steam preparation system (4). The utility model has the characteristics of dry even, save the resource.
Description
Technical Field
The utility model relates to a drying system, especially a steam drying system of nanometer calcium carbonate filter cake.
Background
In the industrial production process of the nano calcium carbonate, the nano calcium carbonate filter cake after centrifugal dehydration needs to be dried. Because the nano calcium carbonate powder is generally subjected to coating modification treatment on the particle surface, the thermal stability of organic matters is generally poor, and the organic matters are easy to coke and deteriorate due to overhigh temperature, so that the dispersive whiteness and the like of the particles are directly influenced. Therefore, in the drying process, besides the prevention of agglomeration among particles, one of the major problems is how to reduce the drying temperature, ensure the quality of the nano calcium carbonate and save energy.
At present, enterprises for producing nano calcium carbonate in China often adopt primary drying equipment such as drying room drying, conveyer belt type drying, disc type drying, rotary cylinder drying, spray drying, vacuum rake type drying, rotary rapid drying and the like. However, almost every drying equipment has the problem of secondary agglomeration of product particles due to single drying form, low heating efficiency or insufficient uniform heating, so that some nano-scale calcium carbonate particles cannot exist in a primary particle state or a state close to the primary particle state, and the function and application of the product are influenced finally; and the energy consumption is higher. For example, the application number is CN201711258930.7, the publication number is 2018.04.17, and the following contents are disclosed in the energy-saving baking method of waste heat multilayer circulation light calcium carbonate: the drying treatment of the drying furnace is that the light calcium carbonate wet cake is dried and dried by a multi-layer circulating light calcium carbonate baking box which is combined by up and down superposition, and hot air is prepared by a chaff combustion furnace for circulating and drying treatment. In the dehydration and drying engineering, chaff combustion furnace is adopted to prepare hot air for drying, the comprehensive utilization of the waste heat of the hot air is carried out by utilizing a multilayer circulation mode, the smoke generated by chaff combustion is settled without pollution emission, and the intelligent ecological resource utilization is realized to produce the light calcium carbonate.
Although the proposal of the patent proposes that the multilayer circulation mode is adopted for drying and the comprehensive utilization of the waste heat of hot air is adopted for reducing the energy consumption, the hot air pipeline is adopted for drying, and the drying treatment is carried out from the outside to the inside of the surface of the wet cake, which easily causes the state of the surface drying and the uneven state of high water content inside the wet cake; and more high-temperature steam in the baking oven is discharged through the heat dissipation grooves or holes, so that the resource is not well utilized, and the resource waste is caused.
Therefore, the existing nano calcium carbonate filter cake drying equipment has the problems of uneven drying and resource waste.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a steam drying system of nanometer calcium carbonate filter cake. The utility model has the characteristics of dry even, save the resource.
The technical scheme of the utility model: the steam drying system for the nano calcium carbonate filter cake comprises a drying chamber, wherein a drying mesh belt is arranged in the drying chamber, hot air ducts are arranged above and below the drying mesh belt, steam heat exchange tubes circularly connected with a steam preparation system are arranged in the hot air ducts, and an air outlet of each hot air duct faces towards the drying mesh belt; the top of drying chamber is equipped with the hydrofuge mouth, is equipped with discharge valve in the hydrofuge mouth, and the hydrofuge mouth is connected with waste heat recovery device's access connection, waste heat recovery device's delivery port and steam preparation system's access connection.
In the steam drying system for the nano calcium carbonate filter cake, a pre-drying chamber is arranged at the front end of the drying chamber, the front end of the drying mesh belt extends into the pre-drying chamber, a first circulating air channel is arranged in an inner cavity of the pre-drying chamber, an air outlet of the waste heat recovery device is connected with one end of the first circulating air channel, and an exhaust pipe is arranged at the other end of the first circulating air channel.
In the steam drying system for the nano calcium carbonate filter cake, a waste heat chamber is arranged at the rear end of the drying chamber, the rear end of the drying mesh belt extends into the waste heat chamber, a second circulating air duct is arranged in an inner cavity of the waste heat chamber, one end of the second circulating air duct is communicated with the outside through a fresh air fan, and the other end of the second circulating air duct is communicated with an air inlet of a hot air duct.
In the steam drying system for the nano calcium carbonate filter cake, a lifting cylinder is arranged outside the pre-drying chamber and above the front end of the drying mesh belt, and a piston rod of the lifting cylinder extends into the pre-drying chamber and is provided with a water content detector; the drying net belt is provided with a plurality of baffle plates with through holes, an object placing space for placing the nano calcium carbonate filter cake is formed between every two adjacent baffle plates, a plurality of air outlet branch pipes corresponding to the object placing space are arranged on the hot air duct, and each air outlet branch pipe is provided with a flow regulating valve.
In the steam drying system of nanometer calcium carbonate filter cake, waste heat recovery device includes the back flow, is equipped with dehumidifying fan and condensation heat exchanger on the back flow, and condensation heat exchanger's inlet end is equipped with the air-blower, and condensation heat exchanger's drainage end is connected with steam preparation system, and condensation heat exchanger's the end of giving vent to anger is connected with first circulation wind channel.
Among the aforementioned steam drying system of nanometer calcium carbonate filter cake, steam preparation system includes condensate pipe, is equipped with the water pump on the condensate pipe, and condensate pipe's one end is connected with condensation heat exchanger's drainage end, and condensate pipe's the other end is connected with the water tank, and the water tank is connected with steam generator, and steam generator is connected with two steam heat exchange tubes.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses an external new trend carries out the heat transfer through steam heat exchange tube, and hot-blast convection through the hot-blast convection current impact of the hot-blast way of both sides about the stoving guipure is dried about going on to the nanometer calcium carbonate filter cake, and the inside clearance of fully heating filter cake atomizes and takes out the water in the filter cake, reduces the heating dead angle, through with the inside and outside simultaneous heating of filter cake, improves the stoving homogeneity, avoids the secondary to reunite the problem, effectively improves the heating efficiency to the nanometer calcium carbonate filter cake, saves the stoving time, reduces the energy consumption.
Furthermore, the probe of the water content detector is controlled by the lifting cylinder to move up and down to detect the water content of each filter cake, and the filter cakes with different water contents and the corresponding hot air flow are controlled by adjusting the flow regulating valve of each air outlet branch pipe according to the water content of the filter cakes, so that the water content is high, the flow is increased, and the drying efficiency is improved; the water content is little, reduces the flow, reduces drying efficiency to carry out its stoving degree of pertinence control to the filter cake, thereby finally guarantee the stoving degree uniformity and the homogeneity of all filter cakes.
Hot steam exhausted from the drying chamber is pumped into a condensing heat exchanger through a dehumidifying fan, and exchanges heat with air sucked by an air blower, and after the heat exchange, the steam is changed into condensed water which is input into a water tank through a water pump to be used for preparing the hot steam again, or the condensed water can be used as water for heating enterprises; the fresh air is changed into hot air, the hot air is conveyed to the pre-drying chamber to preheat the nano calcium carbonate filter cake, or the nano calcium carbonate filter cake can be used as heating of enterprises, so that the drying heat consumption is reduced, and more energy is saved.
Therefore, the utility model has the characteristics of dry evenly, save the resource.
Drawings
FIG. 1 is a schematic view of the present invention;
fig. 2 is a schematic structural view of the waste heat chamber.
The labels in the figures are: 1. a pre-drying chamber; 11. a lifting cylinder; 12. a moisture content detector; 13. an exhaust pipe; 2. a drying chamber; 21. drying the mesh belt; 211. a barrier plate; 212. an object placing space; 22. a hot air duct; 23. a steam heat exchange pipe; 24. an air outlet branch pipe; 25. an exhaust valve; 3. a waste heat recovery device; 31. a return pipe; 32. a moisture extraction fan; 33. a condensing heat exchanger; 34. a blower; 4. a steam preparation system; 41. a condensate pipe; 42. a water pump; 43. a water tank; 44. a steam generator; 5. a waste heat chamber; 51. a second circulating air duct; 52. a fresh air fan; 6. and (4) filtering cakes.
Detailed Description
The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
The embodiment is as follows:
as shown in fig. 1-2, the steam drying system for nano calcium carbonate filter cake comprises a drying chamber 2, a drying mesh belt 21 is arranged in the drying chamber 2, hot air ducts 22 are arranged above and below the drying mesh belt 21, a steam heat exchange pipe 23 circularly connected with the steam preparation system 4 is arranged in the hot air ducts 22, and an air outlet of the hot air ducts 22 faces the drying mesh belt 21; the top of the drying chamber 2 is provided with a moisture exhaust port, an exhaust valve 25 is arranged in the moisture exhaust port, the moisture exhaust port is connected with an inlet of the waste heat recovery device 3, and a water outlet of the waste heat recovery device 3 is connected with an inlet of the steam preparation system 4.
During drying process, external new trend carries out the heat transfer through steam heat exchange tube 23, and the hot-blast export through hot-blast main 22 of upper and lower both sides is upper and lower convection current towards drying mesh belt 21 and is dried process, the inside clearance of fully heating filter cake to with the inside moisture content atomizing of filter cake and take out, reduce the heating dead angle, through with the inside and outside simultaneous heating of filter cake, improve the stoving homogeneity, avoid the secondary to reunite the problem, effectively improve the heating efficiency to nanometer calcium carbonate filter cake 6, save drying time, reduce the energy consumption.
Hot steam exhausted from the drying chamber 2 is pumped into the condensing heat exchanger 33 through the dehumidifying fan 32, and exchanges heat with air sucked by the blower 34, and after the heat exchange, the steam is changed into condensed water which is input into the water tank 43 through the water pump 42 to be used for preparing hot steam again, or can be used as water for heating enterprises; the fresh air is changed into hot air, the hot air is conveyed to the pre-drying chamber 1, the nano calcium carbonate filter cake 6 is preheated and then discharged, and the nano calcium carbonate filter cake can also be used as heating air of an enterprise or communicated with a hot air duct 22, so that energy is saved.
The front end of the drying chamber 2 is provided with a pre-drying chamber 1, the front end of the drying mesh belt 21 extends into the pre-drying chamber 1, a first circulating air duct is arranged in an inner cavity of the pre-drying chamber 1, an air outlet of the waste heat recovery device 3 is connected with one end of the first circulating air duct, and an exhaust pipe 13 is arranged at the other end of the first circulating air duct.
The rear end of the drying chamber 2 is provided with a waste heat chamber 5, the rear end of the drying mesh belt 21 extends into the waste heat chamber 5, a second circulating air duct is arranged in the inner cavity of the waste heat chamber 5, one end of the second circulating air duct 51 is communicated with the outside through a fresh air fan 52, and the other end of the second circulating air duct 51 is communicated with the air inlets of the two hot air ducts 22.
A lifting cylinder 11 is arranged outside the pre-drying chamber 1 and above the front end of the drying mesh belt 21, and a piston rod of the lifting cylinder 11 extends into the pre-drying chamber 1 and is provided with a moisture content detector 12; the drying mesh belt 21 is provided with a plurality of baffle plates 211 with through holes, an object placing space 212 for placing the nano calcium carbonate filter cake 6 is formed between the adjacent baffle plates 211, a plurality of air outlet branch pipes 24 corresponding to the object placing space 212 are arranged on the hot air duct 22, and each air outlet branch pipe 24 is provided with a flow regulating valve.
The probe of the water content detector 12 is controlled to move up and down through the lifting cylinder 11, the probe extends into the nano calcium carbonate filter cakes 6 to detect the water content of each filter cake, and the steam flow corresponding to the filter cakes with different water contents is controlled by adjusting the flow regulating valve of each air outlet branch pipe 24 according to the water content of the filter cakes, so that the water content in the filter cakes is high, the steam flow is increased, and the drying efficiency is improved; the water content is little in the filter cake, reduces the steam flow, reduces drying efficiency to carry out its stoving degree of pertinence control to the filter cake, guarantee the stoving degree uniformity and the homogeneity of all filter cakes finally.
The waste heat recovery device 3 comprises a return pipe 31, a dehumidifying fan 32 and a condensing heat exchanger 33 are arranged on the return pipe 31, an air blower 34 is arranged at the air inlet end of the condensing heat exchanger 33, the water discharging end of the condensing heat exchanger 33 is connected with the steam preparation system 4, and the air outlet end of the condensing heat exchanger 33 is connected with the first circulating air duct or the hot air duct 22.
The steam preparation system 4 comprises a condensate pipe 41, a water pump 42 is arranged on the condensate pipe 41, one end of the condensate pipe 41 is connected with the water discharge end of the condensing heat exchanger 33, the other end of the condensate pipe 41 is connected with a water tank 43, the water tank 43 is connected with a steam generator 44, and the steam generator 44 is connected with the two steam heat exchange pipes 23.
This system still includes the PLC controller, and the PLC controller is connected with temperature sensor, humidity transducer, pressure sensor, moisture content detector 12, flow control valve and discharge valve 25 respectively, and temperature sensor, humidity transducer and pressure sensor all install in drying chamber 2. The water content detector 12 detects the water content of each filter cake and transmits the water content information to the PLC, and the PLC controls each gas outlet branch pipe 24 to be provided with a flow regulating valve according to the water content information so as to regulate the steam flow corresponding to each filter cake; temperature sensor, humidity transducer, pressure sensor convey the temperature information in drying chamber 2, humidity information and pressure information to the PLC controller respectively, are convenient for know the filter cake stoving state and come control discharge valve 25. The specific circuit connections and principles are well within the art and therefore not specifically set forth herein.
Claims (6)
1. Steam drying system of nanometer calcium carbonate filter cake, its characterized in that: the drying device comprises a drying chamber (2), wherein a drying mesh belt (21) is arranged in the drying chamber (2), hot air ducts (22) are arranged above and below the drying mesh belt (21), steam heat exchange tubes (23) which are circularly connected with a steam preparation system (4) are arranged in the hot air ducts (22), and air outlets of the hot air ducts (22) face towards the drying mesh belt (21); the top of drying chamber (2) is equipped with the hydrofuge mouth, is equipped with discharge valve (25) in the hydrofuge mouth, and the access connection of hydrofuge mouth and waste heat recovery device (3), the delivery port and the access connection of steam preparation system (4) of waste heat recovery device (3).
2. The steam drying system of nano calcium carbonate filter cake of claim 1, characterized in that: the front end of the drying chamber (2) is provided with a pre-drying chamber (1), the front end of the drying net belt (21) extends into the pre-drying chamber (1), a first circulating air channel is arranged in an inner cavity of the pre-drying chamber (1), an air outlet of the waste heat recovery device (3) is connected with one end of the first circulating air channel, and an exhaust pipe (13) is arranged at the other end of the first circulating air channel.
3. The steam drying system of nano calcium carbonate filter cake according to claim 1, characterized in that: the rear end of the drying chamber (2) is provided with a waste heat chamber (5), the rear end of the drying mesh belt (21) extends into the waste heat chamber (5), a second circulating air duct is arranged in an inner cavity of the waste heat chamber (5), one end of the second circulating air duct (51) is communicated with the outside through a fresh air fan (52), and the other end of the second circulating air duct (51) is communicated with an air inlet of the hot air duct (22).
4. The steam drying system of nano calcium carbonate filter cake according to claim 2, characterized in that: a lifting cylinder (11) is arranged outside the pre-drying chamber (1) and above the front end of the drying mesh belt (21), and a piston rod of the lifting cylinder (11) extends into the pre-drying chamber (1) and is provided with a moisture content detector (12); the drying net belt (21) is provided with a plurality of baffle plates (211) with through holes, an object placing space (212) for placing the nano calcium carbonate filter cake (6) is formed between every two adjacent baffle plates (211), a plurality of air outlet branch pipes (24) corresponding to the object placing space (212) are arranged on the hot air duct (22), and each air outlet branch pipe (24) is provided with a flow regulating valve.
5. The steam drying system of nano calcium carbonate filter cake according to claim 2, characterized in that: the waste heat recovery device (3) comprises a return pipe (31), a dehumidifying fan (32) and a condensing heat exchanger (33) are arranged on the return pipe (31), an air blower (34) is arranged at the air inlet end of the condensing heat exchanger (33), the water discharging end of the condensing heat exchanger (33) is connected with the steam preparation system (4), and the air outlet end of the condensing heat exchanger (33) is connected with the first circulating air duct.
6. The steam drying system of nano calcium carbonate filter cake of claim 5, characterized in that: steam preparation system (4) are equipped with water pump (42) including condensate pipe (41) on condensate pipe (41), and the one end of condensate pipe (41) is connected with the drainage end of condensation heat exchanger (33), and the other end and the water tank (43) of condensate pipe (41) are connected, and water tank (43) are connected with steam generator (44), and steam generator (44) are connected with two steam heat exchange tube (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222446920.9U CN218120531U (en) | 2022-09-15 | 2022-09-15 | Steam drying system of nanometer calcium carbonate filter cake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222446920.9U CN218120531U (en) | 2022-09-15 | 2022-09-15 | Steam drying system of nanometer calcium carbonate filter cake |
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| Publication Number | Publication Date |
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| CN218120531U true CN218120531U (en) | 2022-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222446920.9U Active CN218120531U (en) | 2022-09-15 | 2022-09-15 | Steam drying system of nanometer calcium carbonate filter cake |
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| CN (1) | CN218120531U (en) |
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- 2022-09-15 CN CN202222446920.9U patent/CN218120531U/en active Active
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