CN219208988U - Multi-steam-passage evaporation crystallization equipment - Google Patents

Abstract

The utility model discloses a multi-steam-passage evaporation crystallization device, which comprises: the heating and stirring device extends along the length direction of the heating cylinder device and stretches out of the heating cylinder device, and two ends of the heating and stirring device are respectively rotatably supported on two end faces of the heating cylinder device. The heating cylinder device and the heating stirring device are respectively provided with a steam inlet and a condensate outlet, and the steam inlet is used for enabling external primary steam to enter the heating cylinder device and the heating stirring device respectively so as to synchronously heat the inside and the outside of the feed liquid in the inner cavity of the heating cylinder device. The heating cylinder device is also provided with a feed inlet for the feed liquid to be treated to enter and a steam outlet for the secondary steam generated by heating and evaporation to be discharged outwards. The device has the advantages of simple and reliable heating structure, simple installation and maintenance, capacity of increasing the heating area of the unit volume of the heating cylinder device, improving the heat exchange area, simultaneously realizing the inner and outer synchronous heating of the feed liquid, and correspondingly improving the heat exchange efficiency of the system.

Description

Multi-steam-passage evaporation crystallization equipment

Technical Field

The utility model relates to the field of garbage leachate treatment devices, in particular to multi-steam-passage evaporation crystallization equipment.

Background

The landfill leachate is typical high-concentration wastewater, has the characteristics of high pollution, high harm, difficult treatment and the like, and various organic matters are listed as important control lists of domestic and foreign environmental protection departments, so that harmless treatment of the landfill leachate is an important subject in the field of global environmental protection all the time. In order to realize zero emission of landfill leachate, evaporation treatment is gradually a better process for landfill leachate treatment, but the existing evaporation crystallization equipment has the problems of different degrees in actual use, how to better perform evaporation, improve system efficiency and the like are still to be perfected. At present, when being used for the evaporation treatment of landfill leachate and industrial wastewater, the following evaporation devices mainly exist, and the technical scheme or working principle is approximately as follows:

1. MVR evaporation device (as shown in figure 1 of the drawings): when the equipment works, a feed valve of liquid to be treated is firstly opened for feeding, after the liquid level in the separator reaches a set height, a circulating pump is slowly started for working, primary steam (external steam or steam generated by self-contained electric heating) is opened for air intake, and the liquid in the separator is heated to a set temperature through a heater; then the vapor compressor is slowly started to suck, the corresponding gas phase pressure in the separator is gradually reduced, and when the gas phase pressure in the separator is reduced to be close to the saturation pressure corresponding to the liquid phase temperature in the tank, the liquid in the separator starts to boil and evaporate, so that secondary steam is generated; the secondary steam is compressed by a steam compressor and then is boosted and heated, and after a certain heat exchange temperature difference is achieved, the secondary steam and the primary steam are used for heating circulating liquid together, so that boiling and evaporation of liquid in the separator are accelerated; when the evaporation in the system tends to be stable, the primary steam supply can be stopped, the compression work of the steam compressor is fully utilized, a stable heat source is provided for the evaporation of the liquid to be treated, and the purpose of energy-saving evaporation is achieved. Because landfill leachate is high-concentration wastewater, the pollution components are complex, the boiling point is easy to rise in the evaporation process, and the water recovery rate of MVR equipment evaporation is not high.

2. Reaction kettle evaporation equipment (shown in figure 2 of the accompanying drawings): when the equipment works, a feed valve of the liquid to be treated is firstly opened for feeding, and after the liquid level in the reaction kettle reaches a set height, a stirrer is started, and a feed valve is closed for feeding; opening the air intake of primary steam (external steam or steam generated by self-contained electric heating), transferring heat to liquid in the kettle through a steam jacket for heating and evaporating, and discharging secondary steam generated by evaporation from the top for condensation treatment or recycling; the condensed water after primary steam condensation is discharged from the bottom of the reaction kettle; when the liquid level is reduced to the set low level by evaporation, the liquid inlet valve is opened to feed liquid again, and thus the heating and evaporation are repeated. After heating for a period of time (set time is determined specifically according to a slag liquid sampling test), a discharge valve at the bottom of the reaction kettle is opened to discharge liquid, the discharge valve is closed after the slag liquid is emptied, then a feed valve is opened to feed, and the next round of evaporation process is repeated. The evaporation equipment is similar to a household steamer, can change the energy through time, has high water recovery rate of equipment evaporation, can realize zero emission, can be used independently under the condition of external steam, and can be configured at the rear end of MVR equipment for further treatment.

3. Thin film heating evaporation apparatus (as shown in figure 3 of the accompanying drawings): the working principle of the equipment is basically the same as that of the reaction kettle evaporation equipment, but a flow distribution mechanism is arranged in the equipment, so that a layer of thinner liquid film is formed on the inner wall of a cylinder body by liquid entering the equipment, and the heat exchange efficiency is higher; in addition, the stirring machine is provided with a scraper, so that possible scale or accumulated materials on the inner wall of the heating cylinder can be cleaned, and the heat transfer stability of the wall surface is maintained; suitable for more viscous materials. Under the condition of external steam, the device can be used independently, can also be configured at the rear end of the MVR device for further treatment, and has higher water recovery rate of about 95 percent.

The problems with several devices are analyzed as follows:

1. MVR evaporation apparatus: because the boiling point is high when the sewage is evaporated, the liquid phase temperature is higher than the gas phase temperature of the secondary steam in the evaporation process, and the current compression temperature rise of the vapor compressor is limited, so that the heating temperature difference between the secondary steam in the heat exchanger and the evaporated liquid is limited, the concentration multiple of the sewage evaporation is not high, the recovery rate of water is about 85%, and other equipment is needed for realizing zero emission.

2. Reaction kettle evaporation equipment: 1) Only the outer jacket supplies heat to be mixed with a common stirrer, and the liquid flow is limited; the inner wall of the cylinder is easy to scale or pollute, the heat transfer of the wall surface is blocked, the heat exchange efficiency of the system is low, and the steam energy consumption is high; 2) The equipment is vertically installed, the discharge flow is difficult to control, the evaporated slag liquid can be fed after being discharged once in actual evaporation, the effective working time is shortened, and the evaporation efficiency is lower; 3) The heat exchange efficiency affects that the same evaporation amount needs larger (long) equipment or more equipment quantity, the matched machine frame and factory building are complex, the overall installation is inconvenient, and the cost is higher.

3. Thin film heating evaporation equipment: compared with the reaction kettle equipment, the heat efficiency is high, the energy consumption is low, but the single equipment is larger (long), and the installation performance is poor; in addition, because the equipment needs to be heated into a film, if equipment problems or medium changes, uneven film distribution, film breakage and dry heat are easy to occur, so that the heat exchange efficiency is greatly reduced.

Disclosure of Invention

The utility model provides a multi-steam-passage evaporation crystallization device, which aims to solve the technical problems of low heat exchange area and low heat exchange efficiency of the existing evaporation crystallization device.

The technical scheme adopted by the utility model is as follows:

a multiple-steam-passage evaporative crystallization apparatus, comprising: the device comprises a hollow heating cylinder device and a heating stirring device, wherein the heating stirring device is rotationally arranged in the heating cylinder device and used for stirring and heating feed liquid to be evaporated and crystallized, the heating stirring device is arranged along the length direction of the heating cylinder device and extends out of the heating cylinder device, and two ends of the heating stirring device are respectively rotationally supported on two end surfaces of two ends of the heating cylinder device; the heating cylinder device and the heating stirring device are respectively provided with a steam inlet and a condensate water outlet, and the steam inlet is used for allowing external primary steam to enter the heating cylinder device and the heating stirring device respectively so as to synchronously heat the inside and outside of the feed liquid in the inner cavity of the heating cylinder device; the heating cylinder device is also provided with a feed inlet for the feed liquid to be treated to enter and a steam outlet for the secondary steam generated by heating and evaporation to be discharged outwards.

Further, the heating cylinder device comprises a heating cylinder body which is transversely arranged horizontally and is hollow in a cylinder shape, and a heating jacket which is wrapped outside the heating cylinder body, and the heating jacket is connected with the outer peripheral surface of the heating cylinder body to form a heating ring cavity which is arranged in a sealing manner; the steam inlet and the condensed water outlet are respectively arranged on the heating jacket and are communicated with the heating annular cavity, and the condensed water outlet is positioned at the lower side of the heating jacket; the feed inlet and the steam outlet are respectively arranged on the heating cylinder body.

Further, the heating cylinder device comprises a hollow cylindrical heating cylinder body which is horizontally arranged in a transverse direction and a heating coil which is spirally wound on the outer circle of the heating cylinder body; the steam inlet and the condensed water outlet are respectively arranged at two ends of the heating coil, and the condensed water outlet is arranged at the lower side of the heating cylinder; the feed inlet and the steam outlet are respectively arranged on the heating cylinder body.

Further, the heating and stirring device comprises a heating and stirring rod group for stirring and heating the filtrate, and a first driving component for driving the heating and stirring rod group to act; the heating stirring rod group is arranged along the length direction of the heating cylinder body, two ends of the heating stirring rod group extend out of the heating cylinder body respectively and then are rotatably supported on two end surfaces of the heating cylinder body, a steam channel extending and penetrating along the length direction of the heating stirring rod group is arranged in the heating stirring rod group, and two end ports of the steam channel form a steam inlet and a condensate water outlet which are arranged on the heating stirring device; the first driving component is arranged outside the heating cylinder device and is connected with the heating stirring rod group at the corresponding end.

Further, the heating stirring rod group comprises a heating installation pipe and stirring pieces which are sequentially arranged at intervals along the length direction of the heating installation pipe; the heating installation tube extends along the length direction of the heating barrel and two ends of the heating installation tube extend out of the heating barrel respectively, two ends of the heating installation tube are rotatably supported on two end faces of the heating barrel respectively, the heating installation tube is a hollow tube, and a steam channel is formed in the inner channel of the heating installation tube.

Further, the stirring piece comprises a mounting rod which is vertically arranged on the heating mounting tube, and two ends of the mounting rod extend towards the inner wall surface of the heating cylinder respectively; the installation pole extends to the quarter butt tip at heating barrel inner chamber middle part and is equipped with the stirring piece that is used for stirring the feed liquid, and its relative extension is equipped with the scraping spoon that is used for stirring the scraping feed liquid to the stock tip that is close to heating barrel inner wall face, and the opening of scraping the material spoon is towards heating agitating unit's direction of rotation.

Further, a plurality of groups of stirring elements are sequentially arranged at intervals and in a staggered manner along the length direction of the heating installation tube; or, among the plurality of groups of stirring elements, the stirring elements positioned at the base digits along the length direction are arranged in the same direction, and the stirring elements positioned at the even digits are arranged in the same direction.

Further, the inner wall surface of the lower side of the heating cylinder body protrudes downwards to form a discharging cavity; the multi-steam passage evaporation crystallization equipment further comprises a stirring and discharging device arranged in the discharging cavity, wherein the stirring and discharging device is used for stirring slag liquid formed after evaporation and intermittently discharging the slag liquid after evaporation.

Further, the stirring and discharging device comprises a stirring and pushing component, a second driving component for driving the stirring and pushing component to act, and a slag discharging pipeline for guiding slag liquid outwards; the stirring pushing component extends along the length direction of the heating cylinder, and two ends of the stirring pushing component extend out of the heating cylinder and are rotatably supported on two end surfaces of the heating cylinder; the second driving component is arranged outside the heating cylinder device and is connected with the stirring pushing component at the corresponding end; the end face of the heating cylinder is also provided with a slag discharging port, and the feeding end of the slag discharging pipeline is communicated with the slag discharging port.

Further, the stirring pushing member comprises a mounting shaft and a stirring pushing piece connected to the outer circle of the mounting shaft; the mounting shafts are rotatably supported on the two end surfaces of the heating cylinder along the length direction of the heating cylinder; the stirring pushing piece is a helical blade extending along the length direction of the installation shaft, or stirring paddles sequentially arranged at intervals along the length direction of the installation shaft.

The utility model has the following beneficial effects:

the multi-steam-passage evaporation crystallization equipment adopts a horizontal and hollow heating barrel device, and has the advantages of simple and reliable heating structure and simple installation and maintenance; the multi-steam-passage evaporation crystallization equipment is provided with the heating barrel device and the heating stirring device, and can synchronously heat the material liquid in the inner cavity of the heating barrel device, so that the heating area of the unit volume of the heating barrel device is increased, the heat exchange area is increased, the inner and outer synchronous heating of the material liquid is realized, and the heat exchange efficiency of the system is also correspondingly improved.

In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The present utility model will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of a prior art MVR vaporization apparatus;

FIG. 2 is a schematic diagram of a heating and evaporating device of a conventional reaction kettle;

FIG. 3 is a schematic diagram of a conventional thin film heating evaporation apparatus;

FIG. 4 is a schematic structural view of a multi-channel evaporative crystallization apparatus according to a preferred embodiment of the present utility model;

FIG. 5 is a schematic view of the cross-sectional structure of A-A of FIG. 4;

FIG. 6 is another schematic structural view of a multi-channel evaporative crystallization apparatus according to a preferred embodiment of the utility model.

Description of the drawings

10. A heating cylinder device; 101. a steam inlet; 102. a condensed water outlet; 103. a steam outlet; 104. a heating ring cavity; 105. a discharge cavity; 106. a slag discharge port; 107. a feed inlet; 11. heating the cylinder; 12. a heating jacket; 13. a filter screen; 14. a liquid level gauge; 15. a heating coil; 20. heating and stirring the device; 201. a steam channel; 21. heating the stirring rod group; 211. heating the mounting tube; 212. a stirring member; 2121. a mounting rod; 2122. stirring sheets; 2123. a scraping spoon; 213. a rotary joint; 22. a first driving member; 30. a stirring and discharging device; 31. a stirring pushing member; 32. a second driving member; 33. a slag discharge pipeline; 331. and (3) switching the valve.

Detailed Description

Embodiments of the utility model are described in detail below with reference to the attached drawing figures, but the utility model can be practiced in a number of different ways, as defined and covered below.

Referring to fig. 4, a preferred embodiment of the present utility model provides a multi-channel evaporative crystallization apparatus, comprising: the device comprises a heating cylinder device 10 which is horizontally arranged in a transverse mode and is hollow and cylindrical, and a heating stirring device 20 which is rotatably arranged in the heating cylinder device 10 and used for stirring and heating feed liquid to be evaporated and crystallized, wherein the heating stirring device 20 is arranged along the length direction of the heating cylinder device 10 and extends out of the heating cylinder device 10, and two ends of the heating stirring device 20 are rotatably supported on two end faces of two ends of the heating cylinder device 10 respectively. The heating cylinder device 10 and the heating stirring device 20 are respectively provided with a steam inlet 101 and a condensate outlet 102, wherein the steam inlet 101 is used for supplying external primary steam into the heating cylinder device 10 and the heating stirring device 20 respectively so as to synchronously heat the feed liquid in the inner cavity of the heating cylinder device 10. The heating cylinder device 10 is also provided with a feed inlet 107 for feeding the feed liquid to be treated and a steam outlet 103 for discharging the secondary steam generated by heating and evaporation.

When the multi-steam-channel evaporation crystallization equipment works, a feeding pipeline for inputting feed liquid to be treated is firstly opened, the feed liquid is fed through a feeding port 107, and when the liquid level in the heating cylinder device 10 reaches a set high liquid level, the feeding pipeline is closed; then, the heating and stirring device 20 and a steam supply pipeline for supplying primary steam are started, and primary steam or other heat mediums respectively enter the heating cylinder device 10 and the heating and stirring device 20 through the steam inlet 101; the steam heats and evaporates the feed liquid in the heating cylinder device 10, and secondary steam generated by evaporation is discharged through the steam outlet 103 for condensation treatment or reutilization; condensed water after primary steam condensation is respectively discharged outwards from the bottom of the heating cylinder device 10 and the condensed water outlet 102 of the heating stirring device 20; when the liquid level of the heating cylinder device 10 is reduced to the set low liquid level by the liquid evaporation, the liquid inlet of the feeding pipeline is opened, and the heating and the evaporation are repeated.

The multi-steam-passage evaporation crystallization equipment adopts the heating cylinder device 10 which is horizontally arranged in a hollow way, and has the advantages of simple and reliable heating structure and simple installation and maintenance; the multi-steam-passage evaporation crystallization equipment is provided with the heating cylinder device 10 and the heating stirring device 20, and can synchronously heat the inside and outside of the feed liquid in the inner cavity of the heating cylinder device 10, so that the heating area of the heating cylinder device 10 per unit volume is increased, the heat exchange area is increased, the synchronous heating of the inside and outside of the feed liquid is realized, and the heat exchange efficiency of the system is also correspondingly improved.

Alternatively, as shown in fig. 4, the heating cylinder device 10 includes a heating cylinder 11 horizontally arranged and hollow, and a heating jacket 12 surrounding the heating cylinder 11, and the heating jacket 12 is connected with the outer peripheral surface of the heating cylinder 11 to form a heating ring cavity 104 in a sealing arrangement. The steam inlet 101 and the condensed water outlet 102 are respectively provided on the heating jacket 12 and communicate with the heating ring chamber 104, and the condensed water outlet 102 is located at the lower side of the heating jacket 12. The feed port 107 and the steam outlet 103 are provided on the heating cylinder 11, respectively. In this alternative, as shown in fig. 4, the steam inlet 101 and the condensed water outlet 102 are respectively arranged at two ends of the heating jacket 12, so as to prolong the action path of steam and further improve the heat exchange efficiency; similarly, the feed inlet 107 and the steam outlet 103 are also arranged at two ends of the heating cylinder 11, so that the evaporation path of the feed liquid is prolonged, and the efficiency of feed liquid evaporation crystallization is improved.

Alternatively, as shown in fig. 6, the heating cylinder device 10 includes a hollow cylindrical heating cylinder 11 horizontally disposed in a transverse direction, and a heating coil 15 spirally wound on the outer circumference of the heating cylinder 11. The steam inlet 101 and the condensed water outlet 102 are provided at both ends of the heating coil 15, and the condensed water outlet 102 is located at the lower side of the heating cylinder 11. The feed port 107 and the steam outlet 103 are provided on the heating cylinder 11, respectively. In the alternative scheme, the steam inlet 101 and the condensed water outlet 102 are respectively arranged at two ends of the heating coil 15, so that the action path of steam is prolonged, and the heat exchange efficiency is further improved; similarly, the feed inlet 107 and the steam outlet 103 are also arranged at two ends of the heating cylinder 11, so that the evaporation path of the feed liquid is prolonged, and the efficiency of feed liquid evaporation crystallization is improved.

Preferably, in the first and second embodiments of the heating cylinder device 10, as shown in fig. 4, a filter mesh 13 for filtering the discharged secondary steam is provided in the steam outlet 103 to prevent grains carried in the secondary steam from being discharged out of the heating cylinder device 10, thereby purifying the exhaust gas.

Preferably, in the first and second embodiments of the heating cartridge device 10, as shown in fig. 4, the heating cartridge device 10 of the present utility model further includes a level gauge 14 for measuring the level of the liquid in the heating cartridge 11, and the level gauge 14 is attached to the inner wall surface of the heating cartridge 11.

Alternatively, as shown in fig. 4, the heating and stirring device 20 includes a heating and stirring rod group 21 for stirring and heating the filtrate, and a first driving member 22 for driving the heating and stirring rod group 21 to act. The heating stirring rod group 21 is arranged along the length direction of the heating cylinder 11, two ends of the heating stirring rod group 21 extend out of the heating cylinder 1 respectively, two ends of the heating stirring rod group 21 are rotatably supported on two end faces of the heating cylinder 11 respectively, a steam channel 201 extending and penetrating along the length direction of the heating stirring rod group 21 is arranged in the heating stirring rod group 21, and two end ports of the steam channel 201 form a steam inlet 101 and a condensate water outlet 102 which are arranged on the heating stirring device 20. The first driving member 22 is disposed outside the heating cylinder device 10 and connected to the heating stirring rod set 21 at the corresponding end. In the alternative scheme, in order to improve the heat exchange area, the scheme of the utility model is designed with two channels of an external heating jacket 12 and an internal steam channel 201, primary steam enters the two heating channels in parallel or in series, the heating area of the unit volume of the heating cylinder device 10 is increased, meanwhile, the internal and external heating of feed liquid is realized, and the heat exchange efficiency of the system is correspondingly improved.

In this alternative, as shown in fig. 4, the first driving member 22 includes a first driving motor, and a sprocket structure connected to the first driving motor, and an output end of the sprocket structure is connected to an overhanging end of the heating stirring rod set 21. In this alternative, the sprocket structure is an existing conventional structure.

In this alternative, as shown in fig. 4, the heating stirring rod set 21 includes a heating installation tube 211, and stirring members 212 sequentially provided at intervals along the length direction of the heating installation tube 211. The heating installation tube 211 extends along the length direction of the heating cylinder 11, two ends of the heating installation tube 211 extend out of the heating cylinder 11 respectively, two ends of the heating installation tube 211 are rotatably supported on two end faces of the heating cylinder 11 respectively, the heating installation tube 211 is a hollow tube, and a steam channel 201 is formed in the inner channel of the heating installation tube 211. Further, as shown in fig. 4, a rotary joint 213 is connected to each of the two extended ends of the heating/stirring rod set 21. Since the heating installation tube 211 is a rotation mechanism, a common rotation joint 213 is designed at both ends of the heating installation tube 211 so as not to affect the connection of the steam pipe.

In this alternative embodiment, as shown in fig. 4 and 5, the stirring member 212 includes a mounting rod 2121 provided perpendicularly to the heating mounting tube 211, and both ends of the mounting rod 2121 extend toward the inner wall surface of the heating cylinder 11, respectively. The short rod end part of the mounting rod 2121 extending to the middle part of the inner cavity of the heating cylinder 11 is provided with a stirring sheet 2122 for stirring the feed liquid, the long rod end part of the mounting rod extending to the position close to the inner wall surface of the heating cylinder 11 is provided with a scraping spoon 2123 for stirring the feed liquid, and an opening of the scraping spoon 2123 faces the rotation direction of the heating stirring device 20. In order to improve the heat exchange efficiency, in the specific embodiment of the alternative scheme, the stirring piece 212 is designed with a long rod and a scraping spoon 2123 and a short rod and a stirring sheet 2122, so that internal and external three-dimensional stirring is formed, and the liquid in the cavity is heated more uniformly and rapidly; wherein the scraping spoon 2123 is arranged on the outer ring and has small distance with the inner wall of the heating cylinder 11, and plays a role in stirring and scraping the wall, so as to clean the inner wall of the heating cylinder 11 from possible scale; in addition, the scraping spoon 2123 is in a spoon shape, and the opening faces the rotating direction of the heating stirring device 20, so that liquid can be thrown onto the inner wall of the heating cylinder 11 above the liquid level in the rotating process, the heating area is better utilized, and the heat exchange efficiency is further improved.

Preferably, the plurality of groups of stirring elements 212 are sequentially arranged at intervals and staggered along the length direction of the heating installation tube 211, and the stirring is sufficient and uniform in this arrangement mode. Alternatively, as shown in fig. 5, among the plurality of sets of stirring members 212, stirring members 212 located at the base digits in the longitudinal direction are arranged in the same direction, and stirring members 212 located at the even digits are arranged in the other same direction.

Alternatively, as shown in fig. 4 and 5, the inner wall surface of the lower side of the heating cylinder 11 is protruded downward to form the discharge chamber 105. The multi-channel evaporation crystallization device further comprises a stirring and discharging device 30 arranged in the discharging cavity 105, wherein the stirring and discharging device 30 is used for stirring slag liquid formed after evaporation and intermittently discharging the slag liquid after evaporation outwards. The discharging cavity 105 and the stirring discharging device 30 for separating slag from liquid are designed in the alternative scheme, so that continuous gap discharging can be realized, the prior liquid discharging is not needed to be discharged and then fed (namely batch discharging) like the conventional heating evaporation equipment, and the working efficiency of the system is greatly improved.

During operation, the material liquid is gradually concentrated and settled into the discharging cavity 105 after being evaporated, after being heated for a period of time (the set time is determined specifically according to a slag liquid sampling test, or a concentration detection instrument is adopted for automatic monitoring), the stirring discharging device 30 is opened to discharge slag liquid, and after the set discharging time is reached, the stirring discharging device 30 is closed to stop discharging; and (5) repeatedly and intermittently discharging.

In this alternative, as shown in fig. 4, the stirring and discharging device 30 includes a stirring and pushing member 31, a second driving member 32 for driving the stirring and pushing member 31 to act, and a slag discharging pipeline 33 for guiding out slag liquid. The stirring and pushing member 31 extends in the longitudinal direction of the heating cylinder 11, and both ends thereof extend out of the heating cylinder 11 and are rotatably supported on both end surfaces of the heating cylinder 11. The second driving member 32 is disposed outside the heating cylinder device 10 and connected to the agitation pushing member 31 at the corresponding end. The end face of the heating cylinder 11 is also provided with a slag discharging port 106, and the feeding end of the slag discharging pipeline 33 is communicated with the slag discharging port 106.

In this alternative embodiment, the second driving member 32 includes a second driving motor, and an output end of the second driving motor is connected to an overhanging end of the corresponding side of the stirring and pushing member 31. The slag discharging pipeline 33 is provided with a switch valve 331 for controlling the on-off of the slag discharging pipeline.

In this alternative, as shown in fig. 4 and 5, the stirring pushing member 31 includes a mounting shaft, and a stirring pushing member attached to the outer circumference of the mounting shaft. The mounting shafts are rotatably supported on both end surfaces of the heating cylinder 11 in the longitudinal direction of the heating cylinder 11. The stirring pushing piece is a helical blade extending along the length direction of the installation shaft, or stirring paddles sequentially arranged at intervals along the length direction of the installation shaft. In this alternative, as shown in fig. 4, the stirring and pushing member 31 turns differently, and the movement direction of the bottom slag liquid is also different. When rotating clockwise, slag liquid is left to right; when the slag liquid rotates anticlockwise, the slag liquid forms a discharging trend from right to left. Therefore, the stirring discharging device 30 needs to intermittently operate, forward and reverse, and stop intermittent operation when operating normally, but rotates in the discharging direction when discharging.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A multiple-pass evaporative crystallization apparatus, comprising:

the device comprises a hollow heating cylinder device (10) and a heating stirring device (20) which is rotationally arranged in the heating cylinder device (10) and used for stirring and heating feed liquid to be evaporated and crystallized, wherein the heating stirring device (20) is arranged along the length direction of the heating cylinder device (10) and extends out of the heating cylinder device (10), and two ends of the heating stirring device (20) are respectively rotationally supported on two end surfaces at two ends of the heating cylinder device (10);

the heating cylinder device (10) and the heating stirring device (20) are respectively provided with a steam inlet (101) and a condensed water outlet (102), and the steam inlet (101) is used for allowing external primary steam to enter the heating cylinder device (10) and the heating stirring device (20) respectively so as to synchronously heat the inside and outside of the feed liquid in the inner cavity of the heating cylinder device (10);

the heating cylinder device (10) is also provided with a feed inlet (107) for feeding the feed liquid to be treated and a steam outlet (103) for discharging the secondary steam generated by heating and evaporation.

2. The multi-channel evaporative crystallization apparatus according to claim 1, wherein,

the heating cylinder device (10) comprises a heating cylinder body (11) which is horizontally arranged in a transverse mode and is hollow in a cylinder shape, and a heating jacket (12) which is wrapped outside the heating cylinder body (11), wherein the heating jacket (12) is connected with the outer peripheral surface of the heating cylinder body (11) to form a heating ring cavity (104) which is arranged in a sealing mode;

the steam inlet (101) and the condensed water outlet (102) are respectively arranged on the heating jacket (12) and are communicated with the heating annular cavity (104), and the condensed water outlet (102) is positioned at the lower side of the heating jacket (12);

the feed inlet (107) and the steam outlet (103) are respectively arranged on the heating cylinder (11).

3. The multi-channel evaporative crystallization apparatus according to claim 1, wherein,

the heating cylinder device (10) comprises a heating cylinder body (11) which is transversely arranged horizontally and is hollow in a cylinder shape, and a heating coil pipe (15) which is spirally wound on the outer circle of the heating cylinder body (11);

the steam inlet (101) and the condensed water outlet (102) are respectively arranged at two ends of the heating coil, and the condensed water outlet (102) is arranged at the lower side of the heating cylinder (11);

the feed inlet (107) and the steam outlet (103) are respectively arranged on the heating cylinder (11).

4. A multi-channel evaporative crystallization apparatus according to claim 2 or 3, wherein,

the heating and stirring device (20) comprises a heating and stirring rod group (21) for stirring and heating the filtrate, and a first driving component (22) for driving the heating and stirring rod group (21) to act;

the heating stirring rod group (21) is arranged along the length direction of the heating cylinder body (11), two ends of the heating stirring rod group extend out of the heating cylinder body (11) respectively, two ends of the heating stirring rod group (21) are rotatably supported on two end faces of the heating cylinder body (11) respectively, a steam channel (201) extending and penetrating along the length direction of the heating stirring rod group is arranged in the heating stirring rod group (21), and two end ports of the steam channel (201) form a steam inlet (101) and a condensed water outlet (102) which are arranged on the heating stirring device (20);

the first driving component (22) is arranged outside the heating cylinder device (10) and is connected with the heating stirring rod group (21) at the corresponding end.

5. The multi-channel evaporative crystallization apparatus according to claim 4, wherein,

the heating stirring rod group (21) comprises a heating installation pipe (211) and stirring pieces (212) which are sequentially arranged at intervals along the length direction of the heating installation pipe (211);

the heating installation tube (211) extends along the length direction of the heating cylinder body (11) and two ends of the heating installation tube extend out of the heating cylinder body (11) respectively, two ends of the heating installation tube (211) are rotatably supported on two end faces of the heating cylinder body (11) respectively, the heating installation tube (211) is a hollow tube, and a steam channel (201) is formed in the inner channel of the hollow tube.

6. The multi-channel evaporative crystallization apparatus according to claim 5, wherein,

the stirring piece (212) comprises a mounting rod (2121) which is arranged vertically to the heating mounting pipe (211), and two ends of the mounting rod (2121) extend towards the inner wall surface of the heating cylinder (11) respectively;

the short rod end part of the installation rod (2121) extending to the middle part of the inner cavity of the heating cylinder (11) is provided with a stirring sheet (2122) for stirring the feed liquid, the long rod end part of the installation rod, which extends relatively to the inner wall surface close to the heating cylinder (11), is provided with a scraping spoon (2123) for stirring the feed liquid, and an opening of the scraping spoon (2123) faces the rotation direction of the heating stirring device (20).

7. The multi-channel evaporative crystallization apparatus according to claim 5, wherein,

the plurality of groups of stirring elements (212) are sequentially arranged at intervals and in a staggered manner along the length direction of the heating installation tube (211); or alternatively

Among the plurality of groups of stirring members (212), stirring members (212) located at the base digits along the length direction are arranged in the same direction, and stirring members (212) located at the even digits are arranged in the other same direction.

8. A multi-channel evaporative crystallization apparatus according to claim 2 or 3, wherein,

the inner wall surface of the lower side of the heating cylinder body (11) protrudes downwards to form a discharging cavity (105);

the multi-steam-passage evaporation crystallization equipment further comprises a stirring and discharging device (30) arranged in the discharging cavity (105), wherein the stirring and discharging device (30) is used for stirring slag liquid formed after evaporation and intermittently discharging the slag liquid after evaporation outwards.

9. The multi-channel evaporative crystallization apparatus according to claim 8, wherein,

the stirring and discharging device (30) comprises a stirring and pushing member (31), a second driving member (32) for driving the stirring and pushing member (31) to act, and a slag discharging pipeline (33) for guiding slag liquid outwards;

the stirring pushing member (31) extends along the length direction of the heating cylinder (11) and two ends of the stirring pushing member extend out of the heating cylinder (11) and are rotatably supported on two end surfaces of the heating cylinder (11);

the second driving component (32) is arranged outside the heating cylinder device (10) and is connected with the stirring pushing component (31) at the corresponding end;

the end face of the heating cylinder body (11) is also provided with a slag discharging port (106), and the feeding end of the slag discharging pipeline (33) is communicated with the slag discharging port (106).

10. The multi-channel evaporative crystallization apparatus according to claim 9, wherein,

the stirring pushing member (31) comprises a mounting shaft and a stirring pushing piece connected to the outer circle of the mounting shaft;

the mounting shafts are rotatably supported on two end surfaces of the heating cylinder (11) along the length direction of the heating cylinder (11);

the stirring pushing piece is a helical blade extending along the length direction of the installation shaft, or stirring paddles sequentially arranged at intervals along the length direction of the installation shaft.

Images