CN214916116U - Diazo reaction device for pigment production - Google Patents

Abstract

The utility model belongs to the technical field of heavy nitrogen reaction unit and specifically relates to a heavy nitrogen reaction unit for pigment production is related to, it includes the cauldron body and cooling device, cooling device sets up outside the cauldron, cooling device includes overcoat in the external clamp cover of cauldron and with press from both sides the communicating first condenser of cover, one side of the cauldron body still is provided with the hydrochloric acid bin, the hydrochloric acid bin communicates with each other with the cauldron body, the gas vent has been seted up on the cauldron body roof, cooling device is still including setting up the internal cooling tube of cauldron, be provided with the water pump in the clamp cover, water pump fixed connection is on the outer wall of the cauldron body, the lateral wall that the lateral wall of the cauldron body was passed to the one end of cooling tube links to each other with the delivery port of water pump is fixed, the lateral wall that the cauldron body was passed to the other end of cooling tube communicates with each other with the clamp cover, the delivery port of water pump communicates with each other with the cooling tube. This application can go into the cooling tube with the comdenstion water pump in the jacket through setting up at the internal cooling tube of cauldron and setting up the water pump in the jacket, and internal cooling to the reaction liquid of cauldron has improved cooling device's cooling effect greatly.

Description

Diazo reaction device for pigment production

Technical Field

The application relates to the field of diazo reaction devices, in particular to a diazo reaction device for pigment production.

Background

Diazotization needs to be carried out under the condition of strong acid, a large amount of heat is usually released in the process of diazotization, however, most of diazonium salts are stable under the condition of low temperature, the decomposition speed of the diazonium salts is accelerated under the condition of high temperature, and meanwhile, nitrous acid is easy to decompose under the condition of high temperature.

Referring to fig. 1, the related art diazo reaction apparatus includes a tank body 1, a hydrochloric acid storage tank 6, and a sodium nitrite solution storage tank 7. A placing table 92 is arranged above the kettle body 1, and the hydrochloric acid storage tank 6 and the sodium nitrite solution storage tank 7 are both placed on the placing table 92. The hydrochloric acid storage tank 6 and the sodium nitrite solution storage tank 7 are both communicated with the kettle body 1. Be equipped with agitating unit 3 on the cauldron body 1, agitating unit 3 includes motor 31 and sets up the (mixing) shaft 32 in the cauldron body 1, and motor 31 passes through bolt fixed connection on the roof of the cauldron body 1, and motor 31's output shaft passes the roof of the cauldron body 1 and links to each other with (mixing) shaft 32 is fixed, a plurality of stirring leaves of even fixedly connected with on the week lateral wall of (mixing) shaft 32. The cooling component 2 is arranged outside the kettle body 1, the cooling component 2 comprises a jacket 21 which is sleeved on the kettle body 1 and a first condenser 22 which is communicated with the jacket 21, and condensed water is filled in the jacket 21.

When the diazotization reaction is needed, the motor 31 is started, the motor 31 can drive the stirring shaft 32 to rotate, and the stirring shaft 32 drives the stirring blades to mix and stir the reaction liquid in the kettle body 1, so that the reaction speed is accelerated; the condensed water in the jacket 21 can cool the reaction liquid in the kettle body 1, the first condenser 22 is started, and the first condenser 22 can cool and circulate the condensed water in the jacket 21.

For the related technologies, the inventor thinks that the heat of the water in the jacket in the related technologies can enter the kettle body only through the conduction of the side wall of the kettle body, the heat loss is large, and the cooling effect of the cooling assembly is not good; if the temperature in the reactor is too high, the decomposition rate of the diazonium salt is increased, thereby reducing the yield of the final product.

SUMMERY OF THE UTILITY MODEL

In order to improve the cooling effect of the diazo reaction device and improve the yield of the final product, the application provides the diazo reaction device for pigment production.

The diazo reaction device for pigment production adopts the following technical scheme:

the utility model provides a heavy nitrogen reaction unit for pigment production, includes the cauldron body, cooling device and agitating unit, cooling device sets up outside the cauldron body, agitating unit sets up on the cauldron body, one side of the cauldron body is provided with the hydrochloric acid bin, the hydrochloric acid bin is linked together with the cauldron body, cooling device locates the outer cover of cauldron, first condenser and sets up the internal cooling tube in cauldron including the cover, be provided with first communicating pipe and second communicating pipe on the first condenser, first condenser communicates with each other with the cover through first communicating pipe and second communicating pipe, be provided with the water pump in the cover, the lateral wall of the cauldron body and the delivery port intercommunication with the water pump are passed to the one end of cooling tube, the lateral wall that the cauldron body was passed to the other end of cooling tube with press from both sides the cover intercommunication.

Through adopting above-mentioned technical scheme, the setting of cooling tube and water pump can be so that the comdenstion water in the jacket can get into in the condenser pipe, at the internal reaction liquid cooling that has improved cooling device's cooling effect to improve the productivity of final product.

Optionally, the stirring device comprises a stirring shaft, the stirring shaft is arranged in the kettle body, and the cooling pipe surrounds the stirring shaft in the kettle body and is spirally arranged.

Through adopting above-mentioned technical scheme, the cooling tube coils in the internal length of multiplicable cooling tube in the cauldron of setting to improve the cooling effect.

Optionally, the stirring device further comprises a motor for driving the stirring shaft to rotate and a stirring blade set arranged on the stirring shaft, wherein the stirring blade set comprises an upper stirring blade positioned above the cooling pipe and a lower stirring blade positioned below the cooling pipe.

Through adopting above-mentioned technical scheme, go up the stirring leaf and set up respectively in the upper and lower both sides of cooling tube with lower stirring leaf, can reduce the influence of the setting of cooling tube to agitating unit.

Optionally, one end of the first communicating pipe is communicated to the jacket, the other end of the first communicating pipe is communicated with the water outlet of the first condenser, a third communicating pipe is further arranged in the jacket, one end of the second communicating pipe penetrates through the jacket to be communicated with the third communicating pipe, the other end of the second communicating pipe is communicated with the water inlet of the first condenser, and one end, far away from the second communicating pipe, of the third communicating pipe is communicated with one end, far away from the water pump, of the cooling pipe.

Through adopting above-mentioned technical scheme, be linked together cooling tube and second communicating tube through third communicating tube, can make the comdenstion water in the cooling tube directly get into first condenser through third communicating tube and cool off, because the temperature of the comdenstion water that flows out in the follow cooling tube is higher than the temperature of the comdenstion water in the cover, so the comdenstion water in cooling tube can be directly leading-in first condenser with the intercommunication of second communicating tube, thereby make the comdenstion water in the cover can keep lower temperature, cooling device's cooling effect has further been improved.

Optionally, a plurality of partition plates are arranged in the jacket, the jacket is divided into a plurality of interlayers by the partition plates, each of the partition plates is provided with a one-way valve for blocking water from flowing from the interlayer close to one side of the bottom wall of the kettle body to the interlayer close to one side of the top wall of the kettle body, and the first communication pipe is provided with a connecting piece for detachably connecting the first communication pipe to the side wall of the interlayer.

Through adopting above-mentioned technical scheme, the setting of baffle, check valve and connecting piece can make the liquid level of the comdenstion water in the double-layered cover controllable, and when the liquid level of the reaction liquid in the reation kettle was lower, can be linked together first communicating pipe through the interlayer of connecting piece with being close to the cauldron body diapire to make the liquid level of the comdenstion water in the double-layered cover also keep lower liquid level height, thereby alleviateed the work burden of first condenser, and then reduced the condition of wasting of resources and taken place.

Optionally, the connecting piece includes the go-between, the go-between rotate set up in on the outer wall of the one end of first condenser is kept away from to first connecting pipe, be provided with the screw thread on the outer wall of go-between, every threaded connection hole has all been seted up on the lateral wall of interlayer, just the length of go-between is greater than the length of threaded connection hole, go-between and one of them threaded connection hole threaded connection, be provided with the sealed lid that is used for sealing the threaded connection hole on the threaded connection hole that is not connected with first connecting pipe on the clamp sleeve, sealed lid and threaded connection hole thread connection.

Through adopting above-mentioned technical scheme, through the setting of go-between and threaded connection hole, can realize dismantling between first connecting pipe and each interlayer and be connected, the simple structure of go-between, easy dismounting.

Optionally, the hydrochloric acid bin includes upper end open-ended box, is used for sealing box open-ended baffle, sets up the loading hopper in the box and sets up the floater in the loading hopper, the one end fixed connection that the loading hopper is close to the box roof is at the opening part of box, the feed inlet intercommunication of opening and loading hopper works as when there is not liquid in the loading hopper, the discharge gate of floater shutoff loading hopper.

By adopting the technical scheme, when a worker adds hydrochloric acid into the hydrochloric acid storage tank, the hydrochloric acid is poured into the charging hopper, the floating ball floats on the liquid level of the hydrochloric acid, and the hydrochloric acid can enter the tank body from the discharge hole of the charging hopper; when hydrochloric acid in the loading hopper completely enters the box body, the floating ball can fall at the discharge port of the loading hopper due to gravity, so that the discharge port is blocked, volatilization of the hydrochloric acid is reduced, and harm to workers caused by the hydrochloric acid when the workers feed the materials is reduced.

Optionally, the kettle body is further provided with a backflow device, the backflow device comprises a solvent recovery tank and a second condenser, the solvent recovery tank and the second condenser are arranged outside the kettle body, an exhaust port communicated to an inner cavity of the solvent recovery tank is formed in the kettle body, the second condenser comprises a cold water pump and a condenser pipe arranged on the cold water pump, one end of the condenser pipe is communicated with a water outlet of the cold water pump, and the other end of the condenser pipe penetrates through the inner cavity of the solvent recovery tank and is communicated with a water inlet of the cold water pump.

Through adopting above-mentioned technical scheme, solvent recovery case can be stored the internal solvent steam of cauldron temporarily, and condenser pipe and second condenser can be cooled down to solvent recovery case inside to make the solvent become liquid from steam, it is internal to flow back to the cauldron through the gas vent again, reflux unit's setting has improved the utilization efficiency of solvent, further has reduced the cost.

Optionally, an air outlet is formed in the solvent recovery tank, and an air bag is connected to the air outlet of the solvent recovery tank.

Through adopting above-mentioned technical scheme, the gasbag can store a certain amount of solvent steam, and when the volume of solvent steam was too much, solvent steam can enter into the gasbag in the solvent recovery case to it leads to the too big occurence of failure that causes the explosion of pressure in the solvent recovery case to reduce the solvent steam in the solvent recovery case, has improved the security.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the arrangement of the cooling pipe and the water pump can ensure that condensed water in the jacket can be pumped into the cooling pipe by the water pump, so that the reaction liquid is cooled in the kettle body, and the cooling effect of the cooling device is improved;

2. the arrangement of the partition plate in the jacket can divide the jacket into a plurality of partition layers, so that the liquid level in the jacket can be controlled, the condensate water in the jacket can be adjusted according to the liquid level of the reaction liquid, the workload of the first condenser is reduced, and the production cost is reduced;

3. the connecting mode between first connecting pipe and the interlayer is changed into to dismantle the connection in the setting of connecting piece, has improved the convenience of dismantling first connecting pipe greatly.

Drawings

FIG. 1 is a sectional view of a diazo reaction apparatus of the related art;

FIG. 2 is a schematic structural diagram of a diazo reaction apparatus in an example of the present application;

FIG. 3 is a sectional view of a diazo reaction apparatus in an example of the present application;

FIG. 4 is an exploded view of the first connection pipe of the diazo reaction apparatus in the embodiment of the present application, which is used to show the connection relationship between the first connection pipe and the jacket;

FIG. 5 is a sectional view of the hydrochloric acid storage tank of the diazo reaction apparatus in the example of the present application;

FIG. 6 is a sectional view of a reflux unit of a diazo reaction apparatus in an example of the present application.

Description of reference numerals: 1. a kettle body; 2. a cooling device; 21. a jacket; 22. a first condenser; 23. a cooling tube; 24. a water pump; 25. a first communication pipe; 26. a second communicating pipe; 27. a third communicating pipe; 3. a stirring device; 31. a motor; 32. a stirring shaft; 33. stirring the leaf group; 331. an upper stirring blade; 332. a lower stirring blade; 4. a connecting member; 41. a connecting ring; 5. a partition plate; 6. a hydrochloric acid storage tank; 61. a box body; 62. a baffle plate; 63. a hopper; 64. a floating ball; 65. a first feed tube; 7. a sodium nitrite solution storage tank; 71. a second feed tube; 8. a reflux device; 81. a solvent recovery tank; 82. a second condenser; 83. a condenser tube; 84. an air bag; 91. a sealing cover; 92. a placing table; 101. an exhaust port; 102. an interlayer; 103. a feed inlet; 104. and an air outlet.

Detailed Description

The present application is described in further detail below with reference to figures 2-6.

The embodiment of the application discloses a diazo reaction device for pigment production. Referring to fig. 2 and 3, the diazo reaction apparatus includes a kettle 1, a stirring device 3, a cooling device 2, a reflux device 8, a hydrochloric acid storage tank 6, and a sodium nitrite solution storage tank 7. Cooling device 2 sets up on the cauldron body 1, and the top of the cauldron body 1 is provided with places platform 92, and agitating unit 3 sets up on placing platform 92 and the cauldron body 1, and reflux unit 8, hydrochloric acid bin 6 and sodium nitrite solution bin 7 all set up on placing platform 92.

Referring to fig. 3, the stirring device 3 includes a motor 31 and a stirring shaft 32, the motor 31 is fixedly connected to the center of the placing table 92 by bolts, the stirring shaft 32 is located in the kettle body 1, and an output shaft of the motor 31 passes through the placing table 92 and the top wall of the kettle body 1 and is fixedly connected to the stirring shaft 32. The circumferential side wall of the stirring shaft 32 is also fixedly connected with a stirring blade group 33, and the stirring blade group 33 comprises an upper stirring blade 331 and a lower stirring blade 332.

Referring to fig. 3, the cooling device 2 comprises a jacket 21, a first condenser 22, a cooling pipe 23 and a water pump 24, wherein the jacket 21 is sleeved on the outer wall of the kettle body 1, a cavity is formed between the jacket 21 and the outer wall of the kettle body 1, and condensed water is filled in the cavity. The cooling tube 23 is spirally wound outside the stirring shaft 32, the upper stirring blade 331 is located above the cooling tube 23, and the lower stirring blade 332 is located below the cooling tube 23. One end of the cooling pipe 23 penetrates through the side wall of the kettle body 1 and is communicated with a water outlet of the water pump 24, the other end of the cooling pipe 23 is communicated with the first condenser 22 through a third communicating pipe 27, and the water pump 24 is fixedly connected to the outer side wall of the kettle body 1.

Referring to fig. 3, the first condenser 22 is disposed on one side of the jacket 21, the first condenser 22 is provided with a first communication pipe 25 and a second communication pipe 26, and the first condenser 22 communicates with the jacket 21 through the first communication pipe 25 and the second communication pipe 26. One end of the first communication pipe 25 communicates with the water outlet of the first condenser 22, and the other end of the first communication pipe 25 communicates with the jacket 21. One end of the second communication pipe 26 is communicated with the water inlet of the first condenser 22, the other end of the second communication pipe 26 is communicated with one end of the third communication pipe 27, and one end of the third communication pipe 27 far away from the second communication pipe 26 is communicated with one end of the cooling pipe 23 far away from the water pump 24.

Referring to fig. 3 and 4, three layers of partition plates 5 are arranged in the jacket 21, the three layers of partition plates 5 are all positioned above the water pump 24, and the partition plates 5 divide a cavity in the jacket 21 into four partition layers 102. The partition 5 is fixedly connected with a check valve, the adjacent partition layers 102 are communicated with each other through the check valve, and the check valve is used for blocking water flow from the upper partition layer 102 to the lower partition layer 102. Four threaded connection holes are formed in the side wall of the jacket 21 close to the first condenser 22, and the four threaded connection holes are respectively communicated with the four partition layers 102. The outer side wall of one end of the first communication pipe 25 far away from the first condenser 22 is circumferentially provided with a connection ring 41, the connection ring 41 is rotatably connected with the first communication pipe 25 through a sealed bearing, the outer wall of the connection ring 41 is provided with threads, the connection ring 41 is in threaded connection with the threaded connection hole positioned at the uppermost part, and the length of the connection ring 41 is greater than the depth of the threaded connection hole. The jacket 21 is further provided with three sealing covers 91, the outer side walls of the three sealing covers 91 close to one end of the jacket 21 are provided with threads, and the three sealing covers 91 are in threaded connection with the remaining three threaded connection holes respectively.

Referring to fig. 3 and 5, the hydrochloric acid storage tank 6 includes a tank body 61 having an upper end opened, a baffle 62 for closing the opening of the tank body 61, a hopper 63 provided in the tank body 61, and a float ball 64 provided in the hopper 63. The baffle plate 62 is hinged at the opening of the box body 61, and one end of the loading hopper 63 close to the opening of the box body 61 is fixedly connected with the inner side wall of the opening edge of the box body 61. The floating ball 64 is positioned above the discharge port of the loading hopper 63, and the radius of the floating ball 64 is larger than that of the discharge port of the loading hopper 63. The lateral wall of one side of the box body 61 close to the motor 31 is provided with a first feeding pipe 65, one end of the first feeding pipe 65 is communicated with the inside of the box body 61, the other end of the first feeding pipe 65 penetrates through the placing table 92 to be communicated with the inside of the kettle body 1, and the first feeding pipe 65 is provided with a first feeding valve. When the material needs to be added into the box body 61, the baffle plate 62 is opened, the material is added into the material adding hopper 63, the floating ball 64 floats on the surface of the liquid, so that the feed port 103 is opened, and the liquid can enter the box body 61 from the feed port 103; when the liquid in the hopper 63 completely flows into the box 61, the floating ball 64 will fall under the action of gravity at the discharge port of the hopper 63, so as to seal the discharge port of the hopper 63.

Referring to fig. 3, the sodium nitrite solution storage tank 7 is located on one side of the motor 31 away from the hydrochloric acid storage tank 6, and a second feeding pipe 71 is arranged on one side wall of the sodium nitrite solution storage tank 7 close to the motor 31. One end of the second feeding pipe 71 is communicated with the inside of the sodium nitrite solution storage tank 7, the other end of the second feeding pipe passes through the placing platform 92 and the top wall of the kettle body 1 and is communicated with the inside of the kettle body 1, and a second feeding valve is arranged on the second feeding pipe 71.

Referring to fig. 3 and 6, the reflux apparatus 8 includes a solvent recovery tank 81, a second condenser 82, a condensation duct 83, and an air bag 84. The solvent recovery tank 81 is disposed on the placement table 92, and an exhaust port 101 communicating with the internal cavity of the solvent recovery tank 81 is opened in the top wall of the kettle 1. The second condenser 82 comprises a cold water pump and a condenser pipe 83 arranged on the cold water pump, one end of the condenser pipe 83 is communicated with a water inlet of the cold water pump, and the other end of the condenser pipe 83 penetrates through the side wall of the solvent recovery tank 81 to be coiled in the solvent recovery tank 81 and penetrates through the side wall of the solvent recovery tank 81 again to be communicated with a water outlet of the cold water pump. An air outlet 104 is formed in the top wall of the solvent recovery tank 81, the air bag 84 is fixedly connected to the air outlet 104 of the solvent recovery tank 81, and the air bag 84 is communicated with the air outlet 104.

The implementation principle of the diazo reaction device for pigment production in the embodiment of the application is as follows: when the diazotization reaction is carried out, the first feeding valve and the second feeding valve are firstly opened, so that the hydrochloric acid and the sodium nitrite solution enter the kettle body 1 to react, the motor 31 is started, the motor 31 drives the stirring shaft 32 to rotate, the stirring shaft 32 drives the stirring blade group 33 to rotate, and the stirring blade group 33 mixes and stirs the reaction liquid in the kettle body 1; when the temperature of the reaction liquid gradually rises and needs to be reduced, the first communicating pipe 25 is in threaded connection with the threaded connecting hole, the first condenser 22 and the water pump 24 are started, the condensed water in the jacket 21 can be filled in the cavity inside the jacket 21 through the one-way valve, the water pump 24 can enable the condensed water pump 24 in the jacket 21 to enter the cooling pipe 23, the condensed water flows back into the first condenser 22 again through the third communicating pipe 27 and the second communicating pipe 26 for cooling, closed circulation is formed, and the condensed water in the jacket 21 and the condensed water in the cooling pipe 23 respectively cool the reaction liquid in the kettle body 1 and outside the kettle body 1.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. The utility model provides a heavy nitrogen reaction unit for pigment production, includes the cauldron body (1), cooling device (2) and agitating unit (3), cooling device (2) set up outside the cauldron body (1), agitating unit (3) set up on the cauldron body (1), one side of the cauldron body (1) is provided with hydrochloric acid bin (6), hydrochloric acid bin (6) are linked together its characterized in that with the cauldron body (1): the cooling device (2) comprises a jacket (21) sleeved outside the kettle body (1), a first condenser (22) and a cooling pipe (23) arranged in the kettle body (1), wherein the first condenser (22) is provided with a first communicating pipe (25) and a second communicating pipe (26), the first condenser (22) is communicated with the jacket (21) through the first communicating pipe (25) and the second communicating pipe (26), a water pump (24) is arranged in the jacket (21), one end of the cooling pipe (23) penetrates through the side wall of the kettle body (1) and is communicated with a water outlet of the water pump (24), and the other end of the cooling pipe (23) penetrates through the side wall of the kettle body (1) and is communicated with the jacket (21).

2. A diazo reaction device for pigment production as claimed in claim 1, characterized in that: agitating unit (3) include (mixing) shaft (32), (mixing) shaft (32) set up in the cauldron body (1), cooling tube (23) encircle (mixing) shaft (32) and be the heliciform setting in the cauldron body (1).

3. A diazo reaction device for pigment production as claimed in claim 2, characterized in that: the stirring device (3) comprises a motor (31) for driving the stirring shaft (32) to rotate and a stirring blade group (33) arranged on the stirring shaft (32), wherein the stirring blade group (33) comprises an upper stirring blade (331) positioned above the cooling pipe (23) and a lower stirring blade (332) positioned below the cooling pipe (23).

4. A diazo reaction device for pigment production as claimed in claim 1, characterized in that: one end of the first communicating pipe (25) is communicated with the jacket (21), the other end of the first communicating pipe (25) is communicated with a water outlet of the first condenser (22), a third communicating pipe (27) is further arranged in the jacket (21), one end of the second communicating pipe (26) penetrates through the jacket (21) to be communicated with the third communicating pipe (27), the other end of the second communicating pipe (26) is communicated with a water inlet of the first condenser (22), and one end, far away from the second communicating pipe (26), of the third communicating pipe (27) is communicated with one end, far away from the water pump (24), of the cooling pipe (23).

5. A diazo reaction device for pigment production as claimed in claim 1, characterized in that: the kettle is characterized in that a plurality of partition plates (5) are arranged in the jacket (21), the jacket (21) is divided into a plurality of partition layers (102) by the partition plates (5), each partition plate (5) is provided with a one-way valve for blocking water flow from flowing from the partition layer (102) close to one side of the bottom wall of the kettle body (1) to the partition layer (102) close to one side of the top wall of the kettle body (1), and the first communication pipe (25) is provided with a connecting piece (4) for detachably connecting the first communication pipe (25) to the side wall of the partition layer (102).

6. A diazo reaction device for pigment production as claimed in claim 5, characterized in that: connecting piece (4) include go-between (41), go-between (41) rotate set up in on the outer wall of the one end of first condenser (22) is kept away from in first connecting pipe (25), be provided with the screw thread on the outer wall of go-between (41), every threaded connection hole has all been seted up on the lateral wall of interlayer (102), just the length of go-between (41) is greater than the length of threaded connection hole, go-between (41) and one of them threaded connection hole threaded connection, it is provided with sealed lid (91) that are used for sealing the threaded connection hole on the threaded connection hole that is not connected with first connecting pipe (25) on clamp cover (21), sealed lid (91) and threaded connection hole threaded connection.

7. A diazo reaction device for pigment production as claimed in claim 1, characterized in that: hydrochloric acid storage tank (6) include upper end open-ended box (61), be used for sealing box (61) open-ended baffle (62), set up loading hopper (63) in box (61) and set up floater (64) in loading hopper (63), one end fixed connection at the opening part of box (61) that loading hopper (63) are close to box (61) roof, the opening communicates with feed inlet (103) of loading hopper (63), works as when there is not liquid in loading hopper (63), the discharge gate of floater (64) shutoff loading hopper (63).

8. A diazo reaction device for pigment production as claimed in claim 1, characterized in that: still be equipped with reflux unit (8) on the cauldron body (1), reflux unit (8) are including setting up solvent recovery case (81) and second condenser (82) outside the cauldron body (1), set up gas vent (101) to the inside cavity of solvent recovery case (81) on the cauldron body (1), second condenser (82) include the cold water pump and set up condenser pipe (83) on the cold water pump, the one end of condenser pipe (83) and the delivery port intercommunication of cold water pump, the inside cavity that the other end of condenser pipe (83) passed solvent recovery case (81) and the water inlet intercommunication of cold water pump.

9. A diazo reaction device for pigment production as claimed in claim 8, characterized in that: an air outlet (104) is formed in the solvent recovery tank (81), and an air bag (84) is connected to the air outlet (104) of the solvent recovery tank (81).

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