2-chloronicotinic acid mother liquor material separation and purification device

Abstract

The invention discloses a 2-chloronicotinic acid mother liquor material separation and purification device which comprises a main frame body, a stirring device is installed on the top face of a top plate of the main frame body, a discharging pipe of the stirring device extends out of the bottom face of the top plate of the main frame body and is communicated with a first control valve, and a filtering box body is installed in the upper portion of the main frame body; the bottom end of the first control valve is communicated with the top end of a feeding pipe mounted on a top cover body of a filtering box body, a side connecting seat is fixed on the right side wall of the filtering box body, and the side connecting seat is fixed on a corresponding side plate of the main frame body; according to the device, 2-chloronicotinic acid crystals can be filtered and transversely moved back and forth, so that liquid between the crystals can be separated from the crystals and drops into the lower shell, separation and material taking are facilitated, the use effect is good, and the heating pieces are detachably connected and are convenient to disassemble, replace and maintain.

Description

Technical field:

[0001] The invention relates to the technical field of chemical equipment, and more specifically to a 2-chloronicotinic acid mother liquid material separation and purification device. Background technology:

[0002] Separation and purification is to extract and separate impurities from a mixture to improve its purity; 2-chloronicotinic acid, as an important agricultural and pharmaceutical intermediate, can be used to prepare new and highly effective herbicides such as nicosulfuron, non-steroidal anti-inflammatory drugs, highly effective anti-inflammatory analgesics such as niflumic acid and pranoprofen, and HIV reverse transcriptase inhibitors such as nevirapine.

[0003] After the production of 2-chloronicotinic acid refined mother liquor is completed, it still contains a large amount of 2-chloronicotinic acid, which needs to be recovered and reused. The existing method is to add water, heat and re-dissolve and mix before separation and purification. It adopts filtration to purify, and in the filtration process, the liquid mixed between the stacked crystals is not easy to flow out cleanly. When taking the material later, it is easy to be mixed between the crystals, affecting the subsequent use effect.

[0004] Meanwhile, the existing heating structure of the mixing barrel generally fixes the entire heating tube around the barrel. When the heating tube is damaged, the entire mixing barrel can only be replaced, which has high replacement costs and limited use effects. Summary of the invention:

[0005] The purpose of the present invention is to provide a 2-chloronicotinic acid mother liquid separation and purification device in view of the deficiencies of the prior art. The device can filter the 2-chloronicotinic acid crystals and move them back and forth laterally to ensure that the liquid between the crystals can be separated from the crystals and drip into the lower shell, which is convenient for separation and material collection and has a good use effect. In addition, the heating plate is detachably connected, which is convenient for disassembly and replacement, and convenient for repair and maintenance.

[0006] The technical solutions of the present invention are as follows:

[0007] A 2-chloronicotinic acid mother liquid separation and purification device comprises a main frame, a stirring device is installed on the top surface of the top plate of the main frame, a discharge pipe of the stirring device extends out of the bottom surface of the top plate of the main frame and is connected to a first control valve, a filter box is installed in the upper part of the main frame, the bottom end of the first control valve is connected to the top end of a feed pipe installed on the top cover of the filter box, a side connecting seat is fixed on the right side wall of the filter box, the side connecting seat is fixed on the corresponding side plate of the main frame, a laterally movable filter box is installed in the filter box, a blanking groove is formed on the bottom plate of the filter box, a filter screen plate is fixed on the top surface of the bottom plate of the filter box, the filter screen plate covers the blanking groove, a transverse guide plate is fixed on the outer side wall of the left side wall plate of the filter box, and the other end of the transverse guide plate is fixed to the side plate of the corresponding side of the main frame;

[0008] The bottom plate of the filter box is connected to a discharge pipe, and the bottom end of the discharge pipe is connected to a second control valve;

[0009] A condenser is fixed in the middle of the main frame, and the discharge port of the second control valve is connected to the feed port at the top of the condenser;

[0010] A horizontal fixing plate is fixed to the lower part of the main frame, a lower shell is fixed to the top surface of the horizontal fixing plate, a plurality of transverse guide rods arranged front and rear are provided in the middle part of the lower shell, two ends of the transverse guide rods are fixed to the left and right side plates of the lower shell, a material receiving box is located in the lower shell and above all the transverse guide rods, a plurality of connecting blocks are fixed to the bottom surface of the bottom plate of the material receiving box, and the connecting blocks are fixed to the sliders of the insert sleeves on the transverse guide rods;

[0011] The outer walls of the left and right side panels of the material receiving box body are fixed with transversely extending main rods, which are inserted into the through holes in the middle parts of the left and right side panels of the lower shell body, and an upper support frame is fixed to the top surface of the left part of the horizontal fixed plate, and a rotating reduction motor is fixed to the rear wall surface of the vertical plate of the upper support frame, and the front end of the output shaft of the rotating reduction motor extends out of the front wall surface of the vertical plate and is fixed with a turntable, and the edge of the turntable is movably connected with one end of a rotating arm through a hinge shaft, and the other end of the rotating arm is movably connected to the end of the main rod on the left side of the material receiving box body through a hinge shaft, and the main rod is inserted into the side through hole formed on the left side panel of the lower shell body;

[0012] The top of the lower shell is fixed with a lower shell main cover, the discharge port at the bottom of the condenser is connected with a third control valve, the bottom end of the third control valve is connected with a lower discharge pipe, the bottom end of the lower discharge pipe is fixed on the lower shell main cover and faces the middle of the top surface of the receiving box body and is connected with the lower shell;

[0013] The bottom plate of the lower shell is connected with a downwardly extending liquid discharge pipe, the bottom end of which extends out of the bottom surface of the horizontal fixing plate and is fixed with a fourth control valve.

[0014] The lower shell main cover is formed with a plurality of material taking observation through holes, and the transparent cover is fixed on the top surface of the lower shell main cover and covers the corresponding material taking observation through holes; the material taking observation through holes face the material receiving box body;

[0015] A sealing ring is sandwiched between the bottom surface of the edge of the lower shell main cover and the top surface of the lower shell main cover.

[0016] The bottom end of the lower discharge pipe is located in the middle through hole of the main cover of the lower shell body, and the outer side wall of the lower discharge pipe is welded and fixed on the inner side wall of the middle through hole.

[0017] A groove is formed in the middle of the bottom surface of the connecting block, a protruding connecting block is fixed in the middle of the top surface of the sliding block, the outer side wall and the top surface of the protruding connecting block are coated with an elastic anti-slip layer, the protruding connecting block is inserted into the corresponding groove, and the outer wall surface of the elastic anti-slip layer is pressed against the corresponding inner side wall or the top surface of the groove;

[0018] A central guide through hole is formed in the middle of the sliding block and runs through the left and right sides. A self-lubricating guide sleeve is fixed on the inner side wall of the central guide through hole, and the transverse guide rod is inserted into the corresponding self-lubricating guide sleeve.

[0019] A side guide sleeve is fixed on the inner wall of the through hole in the middle of the left and right side plates of the lower shell, and an inner sealing guide layer is fixed on the inner wall of the side guide sleeve. The main rod is inserted into the corresponding side guide sleeve, and the inner wall surface of the inner sealing guide layer is tightly attached to the outer wall of the main rod.

[0020] The condenser comprises a top connecting plate and a bottom connecting plate, the left and right sides of the top connecting plate and the bottom connecting plate are fixed on the inner side walls of the left and right side plates of the main frame, and the first vertical material guide pipe and the second vertical material guide pipe are located on the left and right sides of the top connecting plate and the bottom connecting plate;

[0021] The top and bottom ends of the first vertical material guiding tube are welded and fixed on the corresponding top connecting plate and bottom connecting plate, the top connecting plate and bottom connecting plate cover the top and bottom ends of the first vertical material guiding tube, the top and bottom ends of the second vertical material guiding tube extend out of the corresponding through holes on the right parts of the top connecting plate and the bottom connecting plate, the outer side walls of the top and bottom ends of the second vertical material guiding tube are welded and fixed on the inner side walls of the corresponding through holes, the top end of the second vertical material guiding tube extends out of the top connecting plate, which is the feed port at the top of the condenser, and the bottom end of the second vertical material guiding tube extends out of the bottom surface of the bottom connecting plate and is the discharge port at the bottom of the condenser;

[0022] Two ends of the plurality of transverse material guide rods are respectively welded and fixed on the side plates of the first vertical material guide pipe and the second vertical material guide pipe and communicate with the first vertical material guide pipe and the second vertical material guide pipe;

[0023] A plurality of guide partition plates are fixed inside the first vertical material guide pipe and the second vertical material guide pipe, and the side walls of the guide partition plates are welded and fixed on the side plates of the first vertical material guide pipe or the second vertical material guide pipe, and the guide partition plates divide the first vertical material guide pipe and the second vertical material guide pipe into a plurality of sub-vertical cavities, one end of each transverse material guide rod is connected to a sub-vertical cavity of the first vertical material guide pipe, and the same end is connected to a sub-vertical cavity of the second vertical material guide pipe, one end of the adjacent lower transverse material guide rod and the end on the same side of the adjacent upper transverse material guide rod are connected to the same sub-vertical cavity, and the other end of the adjacent lower transverse guide rod is connected to a new sub-vertical cavity, which is below the sub-vertical cavity to which one end of the adjacent upper transverse material guide rod is connected, and all transverse material guide rods, the first vertical material guide pipe and the second vertical material guide pipe form an S-shaped flow channel in this way in sequence.

[0024] Heat dissipation fins are fixed on the outer side walls of all transverse material guide rods;

[0025] The rear side walls of the top connecting plate and the bottom connecting plate are fixed with the same supporting shell, and the rear wall surface of the supporting shell is fixed with a heat dissipation fan. The impeller of the heat dissipation fan is located in the supporting shell and blows air toward all the transverse material guide rods.

[0026] Transverse guide bars are formed or fixed on the front side wall and the rear side wall of the middle part of the filter box body, and the front and rear parts of the bottom surface of the filter box are pressed against the top surfaces of the corresponding transverse guide bars.

[0027] A push-pull cylinder is fixed on the outer wall of the left side plate of the main frame body, the right end of the push rod of the push-pull cylinder extends out of the right side wall of the left side plate of the main frame body and is fixed with a push plate, the right part of the push plate is inserted into the middle through groove of the left side plate of the filter box body, the right side wall of the push plate is fixed to the left side plate of the filter box, and sealing strips are fixed on the four side walls of the push plate, the push plate and the sealing strip cover the middle through groove of the left side plate of the filter box body, the outer side wall of the sealing strip presses against the inner side wall of the corresponding side of the middle through groove, and an extension part is formed on the outer side wall of the left part of the push plate, and the extension part presses against the left side wall of the left side plate of the filter box body.

[0028] The front and rear parts of the top surface of the transverse guide plate are both formed with guide parts, the outer side walls of the extension parts at the front and rear parts of the push plate are close to the inner side walls of the corresponding guide parts, and the bottom surface of the extension part at the bottom of the push plate is close to the top surface of the transverse guide plate;

[0029] A downwardly extending liquid storage groove is formed on the middle top surface of the transverse guide plate, a lower through hole is formed in the middle of the bottom surface of the liquid storage groove, the top of the reflux connector is in the lower through hole, the top outer wall of the reflux connector is welded and fixed to the inner wall of the lower through hole, the reflux connector is connected to the liquid storage groove, and the bottom end of the reflux connector is connected to an external liquid return tank through a connecting pipe.

[0030] A plurality of side control valves are fixed on the outer walls of the side panels of the left and right main frames of the condenser, the outer end interfaces of the side control valves are high-pressure gas inlet connection ports, the inner ends of the side control valves are connected to exhaust pipes, the ends of the exhaust pipes are fixed on the outer walls of the corresponding first vertical material guide pipes or the second vertical material guide pipes and are connected to the corresponding blowing holes on the side panels of the first vertical material guide pipes or the second vertical material guide pipes, and the blowing holes face the feed ports of the corresponding transverse material guide rods.

[0031] The left part and the right part of the bottom plate of the filter box body are both oblique plate parts extending obliquely upward and outward.

[0032] A sealing ring is sandwiched between the bottom surface of the edge of the top cover body and the upper radially extending edge formed on the top outer side wall of the side plate of the filter box body and is fixedly connected by bolts.

[0033] The filter box, the stirring body of the stirring device and the main cover of the lower shell are all equipped with temperature sensors, and the temperature sensors detect the temperature in the filter box, the stirring cylinder of the stirring device and the lower shell.

[0034] The stirring device comprises a stirring cylinder, a support block is fixed to the bottom surface of the bottom of the stirring cylinder, the bottom surface of the support block is fixed to the top surface of the top plate of the main frame, and a discharge pipe is connected to the bottom plate of the stirring cylinder;

[0035] The top of the mixing drum is fixedly connected with an upper cover by bolts, and a sealing ring is sandwiched between the bottom edge of the top plate of the upper cover and the top surface of the side plate of the mixing drum;

[0036] A stirring motor is fixed to the middle of the top surface of the top plate of the upper cover body, and the bottom end of the rotating shaft of the stirring motor extends out of the bottom surface of the upper cover body and is fixed with a stirring wheel;

[0037] The upper cover body is connected with a main feed pipe, and the top of the main feed pipe extends out of the top surface of the upper cover body.

[0038] An outer sleeve portion is fixed on the outer side wall of the mixing cylinder, a plurality of partition vertical plates are welded and fixed on the inner side wall of the outer sleeve portion, and the inner side walls of the partition vertical plates are welded and fixed on the outer side wall of the mixing cylinder;

[0039] All the dividing vertical plates divide the annular cavity formed between the inner wall of the outer sleeve and the outer wall of the mixing drum into a plurality of heating placement grooves and separation grooves. The heating placement grooves and the separation grooves are arranged at intervals, that is, a separation groove is provided between every two adjacent heating placement grooves. The heating plate is inserted into the corresponding heating placement groove. A heat-conducting silicone sheet is fixed on the inner wall of the heating plate. The inner wall of the heat-conducting silicone sheet is pressed against the outer wall of the mixing drum. The upper and lower parts of the outer sleeve corresponding to the heating placement groove are formed with screw-connected through holes. The screw part of the clamping bolt is screwed into the corresponding screw-connected through hole. The inner end of the screw part of the clamping bolt extends into the heating placement groove and presses against the outer wall of the corresponding heating plate.

[0040] The beneficial effects of the present invention are:

[0041] It can filter 2-chloronicotinic acid crystals and move them back and forth laterally to ensure that the liquid between the crystals can be separated from the crystals and drip into the lower shell, which is convenient for separation and material collection, and has a good use effect. In addition, its heating plate is detachably connected, which is convenient for disassembly and replacement, and convenient for repair and maintenance. In addition, its condenser is connected with multiple side control valves and exhaust pipes, which can be connected with high-pressure gas to blow air into the pipeline in the condenser to prevent crystal blockage in the condenser pipeline and ensure the normal transportation of the crystals therein. Description of the drawings:

[0042] Figure 1 It is a schematic diagram of the local structure of the present invention;

[0043] Figure 2 for Figure 1 a partial enlarged view of a portion;

[0044] Figure 3 for Figure 1 a partial enlarged view of another part;

[0045] Figure 4 for Figure 1 There is also a partial enlarged view of some parts;

[0046] Figure 5 for Figure 1 A partial enlarged view of the fourth part;

[0047] Figure 6 It is a partial top view of the condenser;

[0048] Figure 7 It is a schematic diagram of the local structure of the rotating reduction motor;

[0049] Figure 8 It is a partial top view of the mixing drum. Specific implementation method:

[0050] Example: See Figures 1 to 8As shown, a 2-chloronicotinic acid mother liquid separation and purification device comprises a main frame 10, a stirring device 20 is installed on the top surface of the top plate of the main frame 10, a discharge pipe of the stirring device 20 extends out of the bottom surface of the top plate of the main frame 10 and is connected to a first control valve 1, a filter box 30 is installed in the upper part of the main frame 10, the bottom end of the first control valve 1 is connected to the top end of a feed pipe 32 installed on a top cover 31 of the filter box 30, and a side connection seat is fixed on the right side wall of the filter box 30 The side connecting seat is fixed on the corresponding side plate of the main frame 10, and a laterally movable filter box 33 is installed in the filter box 30. A material-dropping groove 331 is formed on the bottom plate of the filter box 33, and a filter screen plate 332 is fixed on the top surface of the bottom plate of the filter box 33. The filter screen plate 332 covers the material-dropping groove 331. A transverse guide plate 333 is fixed on the outer side wall of the left side wall plate of the filter box 33, and the other end of the transverse guide plate 333 is fixed on the side plate of the corresponding side of the main frame 10;

[0051] The bottom plate of the filter box 30 is connected to a discharge pipe 34, and the bottom end of the discharge pipe 34 is connected to a second control valve 2;

[0052] A condenser 40 is fixed in the middle of the main frame 10, and the discharge port of the second control valve 2 is connected to the feed port at the top of the condenser 40 through a connecting pipe (which can be various anti-corrosion and high-temperature resistant hoses or hard pipes);

[0053] A horizontal fixing plate 11 is fixed to the lower part of the main frame 10, a lower shell 12 is fixed to the top surface of the horizontal fixing plate 11, a plurality of transverse guide rods 13 arranged front and rear are provided in the middle part of the lower shell 12, the two ends of the transverse guide rods 13 are fixed to the left and right side plates of the lower shell 12, a material receiving box 14 is located in the lower shell 12 and above all the transverse guide rods 13, a plurality of connecting blocks 15 are fixed to the bottom surface of the bottom plate of the material receiving box 14, and the connecting blocks 15 are fixed to the sliders 16 inserted on the transverse guide rods 13;

[0054] The outer side walls of the left and right side panels of the material receiving box body 14 are fixed with transversely extending main rods 141, which are inserted into the through holes in the middle of the left and right side panels of the lower shell body 12, and the upper support frame 16 is fixed to the left top surface of the horizontal fixed plate 11, and a rotary reduction motor 17 is fixed to the rear wall surface of the vertical plate of the upper support frame 16, and the front end of the output shaft of the rotary reduction motor 17 extends out of the front wall surface of the vertical plate and is fixed with a turntable 18, and the edge of the turntable 18 is movably connected to one end of a rotating arm 19 through a hinge shaft, and the other end of the rotating arm 19 is movably connected to the end of the main rod 141 on the left side of the material receiving box body 14 through a hinge shaft, and the main rod 141 is inserted into the side through hole formed on the left side panel of the lower shell body 12;

[0055] A lower shell main cover 121 is fixed to the top of the lower shell 12, a discharge port at the bottom of the condenser 40 is connected to the third control valve 3, a lower discharge pipe 122 is connected to the bottom end of the third control valve 3, and the bottom end of the lower discharge pipe 122 is fixed to the lower shell main cover 121 and faces the middle of the top surface of the receiving box body 14 and communicates with the lower shell 12;

[0056] A downwardly extending drain pipe 129 is connected to the bottom plate of the lower shell 12 , and the bottom end of the drain pipe 129 extends out of the bottom surface of the horizontal fixing plate 11 and is fixed with the fourth control valve 4 .

[0057] Furthermore, a plurality of material taking observation holes 123 are formed on the lower shell main cover 121, and a pressure relief valve and a pressure gauge are installed on the lower shell main cover 121. When the pressure is too high, the pressure relief valve is opened to achieve exhaust; a transparent cover plate 124 is fixed on the top surface of the lower shell main cover 121 and covers the corresponding material taking observation holes 123; the material taking observation holes 123 face the material receiving box body 14; the material taking observation holes 123 can be used to penetrate the internal situation. When taking materials, it can be separated from the lower shell main cover 121, extended into the interior and take materials from the material receiving box body 14.

[0058] A sealing ring is sandwiched between the bottom surface of the edge of the lower shell main cover 121 and the top surface of the lower shell main cover 121 .

[0059] Furthermore, the bottom end of the lower discharge pipe 122 is located in the middle through hole of the lower shell main cover 121, and the outer side wall thereof is welded and fixed to the inner side wall of the middle through hole.

[0060] Furthermore, a groove is formed in the middle of the bottom surface of the connecting block 15, and a protruding connecting block 161 is fixed in the middle of the top surface of the sliding block 16. The outer wall and top surface of the protruding connecting block 161 are covered with an elastic anti-slip layer. The protruding connecting block 161 is inserted into the corresponding groove, and the outer wall surface of the elastic anti-slip layer is pressed against the corresponding inner wall or top surface of the groove. This structure enables the sliding block 16 and the connecting block 15 to be clamped and fixed by the elastic anti-slip layer, making the installation and disassembly of the two convenient and effective.

[0061] Furthermore, a central guide through hole is formed in the middle of the slider 16 and passes through the slider 16 from left to right. A self-lubricating guide sleeve is fixed on the inner side wall of the central guide through hole, and the transverse guide rod 13 is inserted into the corresponding self-lubricating guide sleeve.

[0062] Furthermore, a side guide sleeve is fixed on the inner wall of the through hole in the middle of the left and right side plates of the lower shell 12, and an inner sealing guide layer is fixed on the inner wall of the side guide sleeve. The main rod 141 is inserted into the corresponding side guide sleeve, and the inner wall surface of the inner sealing guide layer is tightly attached to the outer wall of the main rod 141.

[0063] Furthermore, the condenser 40 includes a top connecting plate 41 and a bottom connecting plate 42, the left and right sides of the top connecting plate 41 and the bottom connecting plate 42 are fixed to the inner side walls of the left and right side plates of the main frame 10, and the first vertical material guide pipe 43 and the second vertical material guide pipe 44 are located at the left and right sides of the top connecting plate 41 and the bottom connecting plate 42;

[0064] The top and bottom ends of the first vertical material guiding tube 43 are welded and fixed on the corresponding top connecting plate 41 and bottom connecting plate 42, and the top connecting plate 41 and bottom connecting plate 42 cover the top and bottom ends of the first vertical material guiding tube 43. The top and bottom ends of the second vertical material guiding tube 44 extend out of the corresponding through holes on the right of the top connecting plate 41 and the bottom connecting plate 42. The outer side walls of the top and bottom ends of the second vertical material guiding tube 44 are welded and fixed on the inner side walls of the corresponding through holes. The top end of the second vertical material guiding tube 44 extends out of the top connecting plate 41, which is the feed port at the top of the condenser 40, and the bottom end of the second vertical material guiding tube 44 extends out of the bottom surface of the bottom connecting plate 42 and is the discharge port at the bottom of the condenser 40.

[0065] Two ends of the plurality of transverse material guide rods 45 are respectively welded and fixed to the side plates of the first vertical material guide pipe 43 and the second vertical material guide pipe 44 and communicate with the first vertical material guide pipe 43 and the second vertical material guide pipe 44;

[0066] A plurality of guide partition plates 46 are fixed inside the first vertical material guide pipe 43 and the second vertical material guide pipe 44. The side walls of the guide partition plates 46 are welded and fixed to the side plates of the first vertical material guide pipe 43 or the second vertical material guide pipe 44. The guide partition plates 46 separate the first vertical material guide pipe 43 and the second vertical material guide pipe 44 into a plurality of sub-vertical cavities. One end of each transverse material guide rod 45 is connected to a sub-vertical cavity of the first vertical material guide pipe 43, and the same end is connected to a sub-vertical cavity of the second vertical material guide pipe 44. The sub-vertical cavities are interconnected, one end of the adjacent lower transverse guide rod 45 and one end of the same side of the adjacent upper transverse guide rod 45 are connected to the same sub-vertical cavity, and the other end of the adjacent lower transverse guide rod 45 is connected to a new sub-vertical cavity, which is below the sub-vertical cavity connected to one end of the adjacent upper transverse guide rod 45. All transverse guide rods 45, the first vertical guide tube 43 and the second vertical guide tube 44 form an S-shaped flow channel in this way.

[0067] Furthermore, heat dissipation fins are fixed on the outer side walls of all the transverse material guide rods 45;

[0068] The rear side walls of the top connecting plate 41 and the bottom connecting plate 42 are fixed with a same supporting shell, and a heat dissipation fan 47 is fixed on the rear wall of the supporting shell. The impeller of the heat dissipation fan 47 is located in the supporting shell and blows air toward all the transverse guide rods 45.

[0069] A plurality of side control valves 5 are fixed on the outer side walls of the side panels of the left and right main frames 10 of the condenser 40, the outer end interfaces of the side control valves 5 being high-pressure gas inlet connection ports, the inner ends of the side control valves 5 being connected to exhaust pipes 6, the ends of the exhaust pipes 6 being fixed on the outer side walls of the corresponding first vertical material guide pipes 41 or the second vertical material guide pipes 42 and being connected to the corresponding blowing holes on the side panels of the first vertical material guide pipes 41 or the second vertical material guide pipes 42, the blowing holes facing the feed ports of the corresponding transverse material guide rods 45.

[0070] The above structure allows the objects flowing through the transverse guide rod 45 to enter the first vertical guide pipe 43 or the second vertical guide pipe 44 and fall vertically without being stranded, thereby ensuring normal transportation. At the same time, the high-pressure gas delivery pipe is connected through the outer end interface of the side control valve 5, and the side control valve 5 is a solenoid valve, which can be opened at a fixed time, that is, opened every 5 to 10 seconds to blow air (the gas uses a gas that will not react with the objects flowing inside, such as some inert gases), thereby preventing some crystals produced after condensation from being blocked in the transverse guide rod 45 and affecting normal transportation.

[0071] Furthermore, transverse guide bars 35 are formed or fixed on the front side wall and the rear side wall of the middle part of the filter box body 30 , and the front and rear parts of the bottom surface of the filter box 33 are pressed against the top surfaces of the corresponding transverse guide bars 35 .

[0072] Furthermore, a push-pull cylinder 36 is fixed to the outer side wall of the left side plate of the main frame 10, and the right end of the push rod of the push-pull cylinder 36 extends out of the right side wall of the left side plate of the main frame 10 and is fixed with a push plate 37. The right part of the push plate 37 is inserted into the middle through groove of the left side plate of the filter box 30, and the right side wall of the push plate 37 is fixed to the left side plate of the filter box 33. Sealing strips 371 are fixed to the four side walls of the right part of the push plate 37. The push plate 37 and the sealing strip 371 cover the middle through groove of the left side plate of the filter box 30, and the outer side wall of the sealing strip 371 presses against the inner side wall of the corresponding side of the middle through groove. An extension portion 372 is formed on the outer side wall of the left part of the push plate 37, and the extension portion 372 presses against the left side wall of the left side plate of the filter box 30.

[0073] Furthermore, the front and rear portions of the top surface of the transverse guide plate 333 are formed with guide portions 334, the outer side walls of the extension portions 372 at the front and rear portions of the push plate 37 are close to the inner side walls of the corresponding guide portions 334, and the bottom surface of the extension portion 372 at the bottom of the push plate 37 is in close contact with the top surface of the transverse guide plate 333;

[0074] The middle top surface of the transverse guide plate 333 is formed with a liquid storage groove 335 extending downward, and the middle of the bottom surface of the liquid storage groove 335 is formed with a lower through hole, the top of the reflux connector 336 is in the lower through hole, the top outer wall of the reflux connector 336 is welded and fixed to the inner wall of the lower through hole, the reflux connector 336 is communicated with the liquid storage groove 335, and the bottom end of the reflux connector 336 is connected to the external liquid return tank through a connecting pipe;

[0075] The filter box 33 can be removed by retracting the push rod of the push-pull cylinder 36, so as to facilitate the replacement and maintenance of the filter screen plate 32 thereon. After the filter box 33 is removed, the liquid brought out can first enter the liquid storage groove 335, and then flow back to the return liquid tank along the reflux connector 336 to facilitate subsequent use.

[0076] Furthermore, the left and right parts of the bottom plate of the filter box body 30 are both oblique plate parts extending obliquely upward and outward.

[0077] Furthermore, a sealing ring is sandwiched between the bottom surface of the edge of the top cover body 31 and the upper radially extending edge formed on the top outer side wall of the side plate of the filter box body 30 and fixedly connected by bolts.

[0078] Furthermore, temperature sensors are installed on the filter box 30, the stirring body of the stirring device 20 and the main cover 121 of the lower shell body (which can be installed at corresponding positions, such as the side plate or top cover 31 of the filter box 30, the upper cover 22 of the stirring device 20, etc., which will not be described in detail here). The temperature sensor detects the temperature in the filter box 30, the stirring cylinder 21 of the stirring device 20 and the lower shell body 12, and it can transmit the detection data to the control host, and the control host controls the opening or closing of part or all of the heating plates 28 to achieve temperature control.

[0079] Furthermore, the stirring device 20 includes a stirring cylinder 21, a support block is fixed to the bottom surface of the bottom of the stirring cylinder 21, the bottom surface of the support block is fixed to the top surface of the top plate of the main frame 10, and a discharge pipe is connected to the bottom plate of the stirring cylinder 21;

[0080] The top of the mixing drum 21 is fixedly connected to an upper cover 22 by bolts, and a sealing ring is sandwiched between the bottom edge of the top plate of the upper cover 22 and the top surface of the side plate of the mixing drum 21;

[0081] A stirring motor 23 is fixed to the middle of the top surface of the top plate of the upper cover body 22, and the bottom end of the rotating shaft of the stirring motor 23 extends out of the bottom surface of the upper cover body 22 and is fixed with a stirring wheel 24;

[0082] The upper cover body 22 is connected with a main feed pipe 25 , and the top of the main feed pipe 25 extends out of the top surface of the upper cover body 22 .

[0083] Furthermore, an outer sleeve portion 26 is fixed to the outer side wall of the mixing cylinder 21, and a plurality of partition vertical plates 27 are welded and fixed to the inner side wall of the outer sleeve portion 26, and the inner side wall of the partition vertical plates 27 is welded and fixed to the outer side wall of the mixing cylinder 21;

[0084] All the dividing vertical plates 27 divide the annular cavity formed between the inner wall of the outer sleeve part 26 and the outer wall of the mixing drum 21 into a plurality of heating placement grooves 271 and separation grooves 272. The heating placement grooves 271 and the separation grooves 272 are arranged at intervals, that is, a separation groove 272 is provided between every two adjacent heating placement grooves 271. The heating plate 28 is inserted into the corresponding heating placement groove 271. A heat-conducting silicone sheet 281 is fixed on the inner wall of the heating plate 28. The inner wall of the heat-conducting silicone sheet 281 is pressed against the outer wall of the mixing drum 21. The heat-conducting silicone sheet 281 increases the heat-conducting contact surface and improves the heat-conducting effect. The upper and lower parts of the outer sleeve part 26 corresponding to the heating placement groove 271 are both formed with screw-connected through holes. The screw portion of the clamping bolt 273 is screwed into the corresponding screw-connected through hole. The inner end of the screw portion of the clamping bolt 273 extends into the heating placement groove 271 and presses against the outer wall of the corresponding heating plate 28.

[0085] The upper and lower parts of the outer wall of the heating plate 28 are both screwed with guide rods 281, and the guide rods 281 extend out of the guide through holes formed on the outer plate of the mixing cylinder 21. The outer end of the guide rod 281 is formed with a limit head with an outer diameter larger than that of the guide rod 281, and a return spring 282 is inserted into the guide rod 281, and one end of the return spring 282 acts on the inner end surface of the limit head, and the other end of the return spring 282 acts on the outer wall of the mixing cylinder 21.

[0086] The top outer wall of the mixing cylinder 21 is formed with an external thread, and the upper annular cover 211 is inserted into the mixing cylinder 21. The bottom surface of the edge of the upper annular cover 211 is formed with an extension part, which is screwed on the external thread.

[0087] The above structure allows that when the heating sheet 28 does not need to be pressed, the clamping bolt 273 can be loosened so that the heat-conducting silicone sheet 281 does not contact the outer wall of the mixing drum 21, thereby reducing the heat conduction effect;

[0088] After the guide rod 281 is removed from the heating plate 28, the clamping bolt 273 is loosened, and the upper annular cover 211 is opened, and the corresponding heating plate 28 can be taken out, making it convenient to replace, repair and maintain.

[0089] When this embodiment is in use, the mother liquor and the water liquid are first introduced into the mixing cylinder 21 from the main feed pipe 25 (after a certain amount of material is poured in, the top end of the main feed pipe 25 can be covered with a cover body and fixed), and the mixing is achieved by running the stirring motor 23. At the same time, the heating plate 28 is heated to make the mother liquor and the water liquid mixed evenly. Then, the first control valve 1 is opened to make the mixed liquid enter the filter box 30, so that some impurities in the mixed liquid are in the filter box 33 and filtered through the filter screen plate 332. Then, the second control valve 2 is opened to enter the condenser 40 for condensation. After condensation, a large number of crystals will be produced, and the third control valve 3 is in an open state. The crystals finally enter the receiving box body 14 of the lower shell body 12, and the receiving box body 14 moves left and right by rotating the reduction motor 17, so that the crystals therein roll back and forth, and the liquid between the crystals and some fine crystals can flow out from the drainage holes on the bottom plate of the receiving box body 14 (the bottom plate of the receiving box body 14 is a porous plate with a plurality of drainage holes formed thereon). The material at the bottom of the lower shell body 12 can be opened by opening the fourth control valve 4, and the bottom end of the fourth control valve 4 is connected to the reflux pipe, which can be connected to the liquid return tank so that it can be reused. Subsequently, you only need to open the transparent cover plate 124 to take out the material, which is very convenient.

[0090] The above implementation modes are only used to illustrate the present invention, but not to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The patent protection scope of the present invention should be defined by the claims.

Claims

1. A 2-chloronicotinic acid mother liquid separation and purification device, comprising a main frame (10), characterized in that: A stirring device (20) is installed on the top surface of the top plate of the main frame (10); a discharge pipe of the stirring device (20) extends out of the bottom surface of the top plate of the main frame (10) and is connected to a first control valve (1); a filter box (30) is installed in the upper part of the main frame (10); the bottom end of the first control valve (1) is connected to the top end of a feed pipe (32) installed on the top cover (31) of the filter box (30); a side connection seat is fixed on the right side wall of the filter box (30); and the side connection seat is fixed to the main frame (10). A transversely movable filter box (33) is installed in the filter box body (30) on the corresponding side plate, a material-dropping groove (331) is formed on the bottom plate of the filter box (33), a filter screen plate (332) is fixed on the top surface of the bottom plate of the filter box (33), the filter screen plate (332) covers the material-dropping groove (331), a transverse guide plate (333) is fixed on the outer side wall of the left side wall plate of the filter box (33), and the other end of the transverse guide plate (333) is fixed to the side plate on the corresponding side of the main frame body (10); A discharge pipe (34) is connected to the bottom plate of the filter box (30), and a second control valve (2) is connected to the bottom end of the discharge pipe (34); A condenser (40) is fixed in the middle of the main frame (10), and the discharge port of the second control valve (2) is connected to the feed port at the top of the condenser (40); A horizontal fixing plate (11) is fixed at the bottom of the main frame (10), a lower shell (12) is fixed on the top surface of the horizontal fixing plate (11), a plurality of transverse guide rods (13) arranged front and rear are provided in the middle of the lower shell (12), two ends of the transverse guide rods (13) are fixed on the left and right side plates of the lower shell (12), a material receiving box (14) is located in the lower shell (12) and above all the transverse guide rods (13), a plurality of connecting blocks (15) are fixed on the bottom surface of the bottom plate of the material receiving box (14), and the connecting blocks (15) are fixed to the sliding blocks (16) inserted into the transverse guide rods (13); A transversely extending main rod (141) is fixed on the outer side walls of the left and right side plates of the material receiving box body (14), and the main rod (141) is inserted into the through hole in the middle of the left and right side plates of the lower shell body (12); an upper support frame (16) is fixed to the left top surface of the horizontal fixed plate (11), and a rotating reduction motor (17) is fixed to the rear wall surface of the vertical plate of the upper support frame (16); the front end of the output shaft of the rotating reduction motor (17) extends out of the front wall surface of the vertical plate and is fixed with a turntable (18); the edge of the turntable (18) is movably connected to one end of a rotating arm (19) through a hinge shaft, and the other end of the rotating arm (19) is movably connected to the end of the main rod (141) on the left side of the material receiving box body (14) through a hinge shaft, and the main rod (141) is inserted into the side through hole formed on the left side plate of the lower shell body (12); A lower shell main cover (121) is fixed to the top of the lower shell (12); a discharge port at the bottom of the condenser (40) is connected to a third control valve (3); a lower discharge pipe (122) is connected to the bottom end of the third control valve (3); a bottom end of the lower discharge pipe (122) is fixed to the lower shell main cover (121) and faces the middle of the top surface of the receiving box body (14) and is connected to the lower shell (12); A downwardly extending liquid discharge pipe (129) is connected to the bottom plate of the lower housing (12); the bottom end of the liquid discharge pipe (129) extends out of the bottom surface of the horizontal fixing plate (11) and is fixed with a fourth control valve (4).

2. A 2-chloronicotinic acid mother liquid separation and purification device according to claim 1, characterized in that: A plurality of material taking observation through holes (123) are formed on the lower shell main cover (121); a transparent cover plate (124) is fixed on the top surface of the lower shell main cover (121) and covers the corresponding material taking observation through holes (123); the material taking observation through holes (123) face the material receiving box body (14); A sealing ring is sandwiched between the bottom surface of the edge of the lower shell main cover (121) and the top surface of the lower shell main cover (121).

3. A 2-chloronicotinic acid mother liquid separation and purification device according to claim 1, characterized in that: The bottom end of the lower discharge pipe (122) is located in the middle through hole of the lower shell main cover (121), and its outer side wall is welded and fixed to the inner side wall of the middle through hole.

4. A 2-chloronicotinic acid mother liquid separation and purification device according to claim 1, characterized in that: A groove is formed in the middle of the bottom surface of the connecting block (15), a protruding connecting block (161) is fixed in the middle of the top surface of the sliding block (16), the outer side wall and the top surface of the protruding connecting block (161) are coated with an elastic anti-slip layer, the protruding connecting block (161) is inserted into the corresponding groove, and the outer wall surface of the elastic anti-slip layer is pressed against the corresponding inner side wall or top surface of the groove; A central guide through hole is formed in the middle of the slider (16) and runs through the left and right sides. A self-lubricating guide sleeve is fixed on the inner side wall of the central guide through hole, and the transverse guide rod (13) is inserted into the corresponding self-lubricating guide sleeve.

5. A 2-chloronicotinic acid mother liquid separation and purification device according to claim 1, characterized in that: A side guide sleeve is fixed on the inner side wall of the through hole in the middle of the left and right side plates of the lower shell (12), and an inner sealing guide layer is fixed on the inner side wall of the side guide sleeve. The main rod (141) is inserted into the corresponding side guide sleeve, and the inner wall surface of the inner sealing guide layer is tightly attached to the outer side wall of the main rod (141).

6. A 2-chloronicotinic acid mother liquid separation and purification device according to claim 1, characterized in that: The condenser (40) comprises a top connecting plate (41) and a bottom connecting plate (42), the left and right sides of the top connecting plate (41) and the bottom connecting plate (42) are fixed on the inner side walls of the left and right side plates of the main frame (10), and the first vertical material guide pipe (43) and the second vertical material guide pipe (44) are located on the left and right sides of the top connecting plate (41) and the bottom connecting plate (42); The top and bottom ends of the first vertical material guiding tube (43) are welded and fixed on the corresponding top connecting plate (41) and bottom connecting plate (42), the top connecting plate (41) and bottom connecting plate (42) cover the top and bottom ends of the first vertical material guiding tube (43), the top and bottom ends of the second vertical material guiding tube (44) extend out of the corresponding through holes on the right side of the top connecting plate (41) and bottom connecting plate (42), the outer side walls of the top and bottom ends of the second vertical material guiding tube (44) are welded and fixed on the inner side walls of the corresponding through holes, the top end of the second vertical material guiding tube (44) extends out of the top connecting plate (41), which is the feed port at the top of the condenser (40), and the bottom end of the second vertical material guiding tube (44) extends out of the bottom surface of the bottom connecting plate (42) and is the discharge port at the bottom of the condenser (40); Two ends of the plurality of transverse material guide rods (45) are respectively welded and fixed on the side plates of the first vertical material guide pipe (43) and the second vertical material guide pipe (44) and communicate with the first vertical material guide pipe (43) and the second vertical material guide pipe (44); A plurality of guide partition plates (46) are fixed inside the first vertical material guide pipe (43) and the second vertical material guide pipe (44). The side walls of the guide partition plates (46) are welded and fixed to the side plates of the first vertical material guide pipe (43) or the second vertical material guide pipe (44). The guide partition plates (46) separate the first vertical material guide pipe (43) and the second vertical material guide pipe (44) into a plurality of sub-vertical cavities. One end of each transverse material guide rod (45) is communicated with a sub-vertical cavity of the first vertical material guide pipe (43), and the same end is communicated with the second vertical material guide pipe (44). 44), one end of the adjacent lower transverse guide rod (45) and one end of the same side of the adjacent upper transverse guide rod (45) are connected to the same sub-vertical cavity, and the other end of the adjacent lower transverse guide rod (45) is connected to a new sub-vertical cavity, which is located below the sub-vertical cavity connected to one end of the adjacent upper transverse guide rod (45), and all the transverse guide rods (45), the first vertical guide pipe (43) and the second vertical guide pipe (44) sequentially form an S-shaped flow channel in this way.

7. A 2-chloronicotinic acid mother liquid separation and purification device according to claim 6, characterized in that: Heat dissipation fins are fixed on the outer side walls of all the transverse material guide rods (45); The rear side walls of the top connecting plate (41) and the bottom connecting plate (42) are fixed with a same supporting shell, and a heat dissipation fan (47) is fixed on the rear wall surface of the supporting shell. The impeller of the heat dissipation fan (47) is located in the supporting shell and blows air toward all the transverse guide rods (45).

8. The 2-chloronicotinic acid mother liquid separation and purification device according to claim 1, characterized in that: Transverse guide bars (35) are formed or fixed on the front side wall and the rear side wall of the middle part of the filter box (30), and the front and rear parts of the bottom surface of the filter box (33) are pressed against the top surfaces of the corresponding transverse guide bars (35).

9. A 2-chloronicotinic acid mother liquid separation and purification device according to claim 8, characterized in that: A push-pull cylinder (36) is fixed on the outer side wall of the left side plate of the main frame (10), the right end of the push rod of the push-pull cylinder (36) extends out of the right side wall of the left side plate of the main frame (10) and is fixed with a push plate (37), the right part of the push plate (37) is inserted into the middle through groove of the left side plate of the filter box (30), the right side wall of the push plate (37) is fixed to the left side plate of the filter box (33), and sealing strips (371) are fixed on the four side walls of the right part of the push plate (37), the push plate (37) and the sealing strip (371) cover the middle through groove of the left side plate of the filter box (30), the outer side wall of the sealing strip (371) is pressed against the inner side wall of the corresponding side of the middle through groove, and an extension part (372) is formed on the outer side wall of the left part of the push plate (37), and the extension part (372) is pressed against the left side wall of the left side plate of the filter box (30).

10. A 2-chloronicotinic acid mother liquid separation and purification device according to claim 9, characterized in that: The front and rear portions of the top surface of the transverse guide plate (333) are both formed with guide portions (334), the outer side walls of the extension portions (372) at the front and rear portions of the push plate (37) are close to the inner side walls of the corresponding guide portions (334), and the bottom surface of the extension portion (372) at the bottom of the push plate (37) is in close contact with the top surface of the transverse guide plate (333); The middle top surface of the transverse guide plate (333) is formed with a liquid storage groove (335) extending downward, and the middle of the bottom surface of the liquid storage groove (335) is formed with a lower through hole, the top of the reflux connector (336) is located in the lower through hole, the top outer wall of the reflux connector (336) is welded and fixed to the inner wall of the lower through hole, the reflux connector (336) is in communication with the liquid storage groove (335), and the bottom end of the reflux connector (336) is in communication with an external liquid return tank via a connecting pipe.

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