CN217449020U

CN217449020U - Special DTB crystallizer of ferric nitrate production

Info

Publication number: CN217449020U
Application number: CN202221262046.7U
Authority: CN
Inventors: 薛儒煜; 刘文德; 陈家庆
Original assignee: Foshan Huaxisheng Chemical Co ltd
Current assignee: Foshan Huaxisheng Chemical Co ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2022-09-20
Anticipated expiration: 2032-05-25

Abstract

The utility model discloses a DTB crystallizer special for producing ferric nitrate, which comprises a cylinder body, a flow guide pipe, a motor and a propeller, wherein the flow guide pipe is vertically arranged in the inner cavity of the cylinder body, the propeller is arranged in the guide pipe, the main shaft of the motor is connected with a rotating shaft which is inserted into the guide pipe, the propeller is arranged on the rotating shaft, a heater is arranged outside the cylinder body, a liquid discharge pipe and a liquid inlet pipe are respectively led out from the upper part and the lower part of the cylinder body, the liquid discharge pipe is connected with a liquid inlet of the heater, the liquid inlet pipe is connected with a liquid outlet of the heater, a steam pipe is led out of the top of the cylinder body and is connected with a cooler outside the cylinder body, an upper stirring blade is arranged on the rotating shaft and above the flow guide pipe, an annular liquid suction pipe is arranged above the upper stirring blade, a plurality of liquid suction nozzles are arranged at the bottom of the annular liquid suction pipe at intervals, the crystallization process is uniform and efficient through uniform stirring of the upper stirring blade and uniform suction of the liquid suction nozzle.

Description

Special DTB crystallizer of ferric nitrate production

Technical Field

The utility model relates to a chemical machinery technical field, concretely relates to special DTB crystallizer of ferric nitrate production.

Background

The DTB crystallizer is widely applied to chemical enterprises which need to obtain solid products through crystallization. The DTB crystallizer is an evaporative crystallization mode device. Specifically, the chemical liquid is prepared into a supersaturated state, then the liquid in the chemical liquid is evaporated into steam by heating, the steam is pumped out and cooled, the chemical liquid near the liquid surface is changed into the supersaturated state due to the evaporation loss of the liquid, meanwhile, the supersaturated chemical liquid is crystallized due to cooling, crystal grains are generated, large crystal grains sink into an elutriation column at the bottom of a DTB crystallizer, and therefore the required crystals are obtained, and the cooled chemical liquid is pumped into a heater to be heated and then is sent back into a cylinder.

The DTB crystallizer in the prior art has the problems of chemical liquid crystallization and heating nonuniformity. Since the temperature of the space above the liquid level in the cylinder is non-uniform, the crystallization at the liquid level is also non-uniform, and most of the saturated chemical liquid flows back to the bottom of the cylinder without crystallization or is pumped to a heater for repeated heating, so that the crystallization efficiency is very low. In addition, after the chemical liquid is pumped and repeatedly heated, and then is sent back to the guide pipe, the chemical liquid is not fully stirred in the guide pipe and is already conveyed to the liquid level, which is also a factor influencing the crystallization efficiency. The technical problem that the DTB crystallizer is disturbed in the industry is solved.

SUMMERY OF THE UTILITY MODEL

To the technical defect who exists in the background art, the utility model provides a special DTB crystallizer of ferric nitrate production has solved above-mentioned technical problem and has satisfied the actual demand, and concrete technical scheme is as follows:

the utility model provides a special DTB crystallizer of ferric nitrate production, the novel nipple rectifier comprises a cylindrical shel, the honeycomb duct, motor and screw, the vertical setting of honeycomb duct is in the inner chamber of barrel, the screw sets up in the honeycomb duct, motor spindle is connected with the axis of rotation, the axis of rotation injects in the honeycomb duct, the screw is installed in the axis of rotation, dispose the heater outside the barrel, draw forth fluid-discharge tube and feed liquor pipe respectively from barrel upper portion and lower part, the heater inlet is connected to the fluid-discharge tube, the heater liquid outlet is connected to the feed liquor pipe, the steam pipe is drawn forth at the barrel top, the outside cooler of steam pipe connection barrel, the stirring vane is installed in the top that lies in the honeycomb duct in the axis of rotation, be provided with annular pipette above last stirring vane, be provided with many imbibition mouths in annular pipette bottom interval.

Furthermore, the lower section pipe body of the flow guide pipe is of a horn-shaped structure.

Further, a lower stirring blade is arranged below the flow guide pipe.

Furthermore, a plurality of spiral flow deflectors which are arranged from top to bottom at intervals are arranged on the circumferential wall body of the cylinder body.

Further, the heater comprises a flow dividing chamber, a heat exchange chamber and a converging chamber, wherein the flow dividing chamber and the converging chamber are respectively arranged at two ends of the heat exchange chamber, a plurality of heat exchange tubes are arranged in the heat exchange chamber and communicated with the flow dividing chamber and the converging chamber, and a steam inlet and a cooling water outlet are respectively arranged at two sides of the heat exchange chamber.

Furthermore, the cooler is a spray type cooler, a spray header is arranged at the upper part of an inner cavity of the cooler, a cold water supply pipe is arranged on the corresponding side wall and supplies cold water to the spray header, a steam pipe is connected between the lower part of the cooler and the top of the cylinder, and a water outlet is arranged at the bottom of the cooler.

The utility model has the advantages of that:

1. according to the DTB crystallizer special for producing the iron nitrate, the upper stirring blades are arranged at the liquid level of the cylinder body, and the high-temperature chemical liquid flowing out of the flow guide pipe is uniformly stirred, so that the liquid level is crystallized more uniformly.

2. An annular liquid suction pipe is arranged above the upper stirring blade, so that the chemical liquid with lower temperature for completing crystallization at the liquid level is uniformly pumped away and reheated, and the crystallization efficiency can be improved.

3. The existence of the lower stirring blade can uniformly stir the chemical liquid which flows back from the upper part, thereby creating conditions for better uniformly stirring the chemical liquid which enters the guide pipe again after being heated.

4. The existence of the spiral flow deflector on the inner side wall of the cylinder body enables chemical liquid with lower temperature after crystallization at the upper part to flow back to the bottom from the flow channel at the outer side of the flow guide pipe, and also carries out spiral stirring on the chemical liquid, so that the chemical liquid with different temperatures in all areas is uniformly stirred into a state with the same temperature, thereby creating conditions for subsequent recrystallization.

Drawings

Fig. 1 is a schematic structural view of the DTB crystallizer dedicated for producing ferric nitrate.

Wherein: the device comprises a cylinder body 1, a flow guide pipe 2, a motor 3, a propeller 4, a rotating shaft 5, a heater 6, a heater liquid inlet 61, a heater liquid outlet 62, a liquid discharge pipe 7, a liquid inlet pipe 8, a steam pipe 9, a cooler 10, an upper stirring blade 11, a lower stirring blade 12, a ring-shaped liquid suction pipe 13, a liquid suction nozzle 14, a spiral flow deflector 15, a flow dividing chamber 16, a heat exchange chamber 17, a confluence chamber 18, a heat exchange pipe 19, a water vapor inlet 20, a cooling water outlet 21, a spray header 22, a cold water supply pipe 23 and a water outlet 24.

Detailed Description

Embodiments of the present invention will be described with reference to the accompanying drawings and related embodiments, wherein the following embodiments are only preferred embodiments for better illustrating the present invention, and the embodiments of the present invention are not limited to the following embodiments, and the related essential components of the present invention related to the technical field should be considered as known in the art and can be known and mastered by those skilled in the technical field.

In the description of the present invention, it is to be understood that the terms "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "inner," and the like, are used in the orientation or positional relationship indicated in the drawings, which are based on the orientation or positional relationship shown in the drawings, and are used only for the purpose of sub-description and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention; furthermore, the terms "primary", "secondary" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated; thus, "primary" and "secondary" are defined for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly including one or more of such features.

The special DTB crystallizer for producing the ferric nitrate comprises a cylinder body 1, a flow guide pipe 2, a motor 3 and a propeller 4, wherein the flow guide pipe 2 is vertically arranged in an inner cavity of the cylinder body 1, a lower section pipe body of the flow guide pipe 2 is of a horn-shaped structure, and the structure is favorable for chemical liquid below to flow upwards into the flow guide pipe 2. The propeller 4 is arranged in the flow guide pipe 2, the top of the cylinder body 1 is provided with the motor 3, the main shaft of the motor is connected with the rotating shaft 5, the rotating shaft 5 penetrates through the cylinder body 1 and penetrates through the flow guide pipe 2 from the top, the propeller 4 is arranged on the rotating shaft 5, the heater 6 is arranged outside the cylinder body 1, the liquid discharge pipe 7 and the liquid inlet pipe 8 are respectively led out from the upper part and the lower part of the cylinder body 1, the liquid discharge pipe 7 is connected with the liquid inlet 61 of the heater, the liquid inlet pipe 8 is connected with the liquid outlet 62 of the heater, the steam pipe 9 is led out from the top of the cylinder body 1, the steam pipe 9 is connected with the cooler 10 outside the cylinder body 1, the upper stirring blade 11 is arranged on the rotating shaft 5 and positioned above the flow guide pipe 2, the lower stirring blade 12 is arranged below the flow guide pipe 2, the propeller 4, the upper stirring blade 11 and the lower stirring blade 12 are driven by the rotating shaft 5 to synchronously rotate, and the annular liquid suction pipe 13 is arranged above the upper stirring blade 11, a plurality of liquid suction nozzles 14 are arranged at intervals at the bottom of the annular liquid suction pipe 13, the liquid suction nozzles 14 can uniformly suck the crystallized chemical liquid at the liquid level, and the chemical liquid is sucked into the heater 6 for repeated heating. A plurality of spiral flow deflectors 15 which are arranged from top to bottom at intervals are arranged on the circumferential wall body of the barrel body 1.

The heater 6 comprises a diversion chamber 16, a heat exchange chamber 17 and a confluence chamber 18, the diversion chamber 16 and the confluence chamber 18 are respectively arranged at two ends of the heat exchange chamber 17, a plurality of heat exchange tubes 19 are arranged in the heat exchange chamber 17 in an array manner, the heat exchange tubes 19 are communicated with the diversion chamber 16 and the confluence chamber 18, chemical liquid at the liquid level in the cylinder body 1 is sucked by a liquid suction nozzle 14 on a ring-shaped liquid suction pipe 13, enters the diversion chamber 16 of the heater 6 through a liquid discharge pipe 7, then flows through the heat exchange tubes 19, then flows through a liquid inlet pipe 8 after being converged in the confluence chamber 18 and returns to the guide pipe 2 of the cylinder body 1. A steam inlet 20 and a cooling water outlet 21 are respectively arranged on two sides of the heat exchange chamber 17, steam enters the heat exchange chamber 17 from the steam inlet 20, the chemical liquid flowing through the heat exchange tubes 19 is reheated, and the cooled steam is changed into cooling water and flows away from the cooling water outlet 21.

The cooler 10 is a spray type cooler 10, a spray header 22 is arranged at the upper part of an inner cavity of the cooler 10, a cold water supply pipe 23 is arranged on the side wall of the corresponding position, the cold water supply pipe 23 supplies cold water to the spray header 22, a steam pipe 9 is connected between the lower part of the cooler 10 and the top of the cylinder 1, chemical liquid steam gasified at high temperature in the cylinder 1 is discharged into the steam pipe 9 and finally enters the lower part of the cooler 10 to be cooled and liquefied by the cold water sprayed from the upper part, and the liquefied chemical liquid is discharged from a water outlet 24 at the bottom of the cooler 10. The process of gasifying the chemical liquid in the cylinder 1 is the process of crystallizing the chemical liquid by saturating the liquid surface.

The crystallizer is provided with the stirring mechanisms in each area where the chemical liquid flows, so that the chemical liquid is kept uniform in each area, and the crystallization efficiency is improved

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a special DTB crystallizer of ferric nitrate production, the novel nipple rectifier comprises a cylindrical shel, the honeycomb duct, motor and screw, the vertical setting of honeycomb duct is in the inner chamber of barrel, the screw sets up in the honeycomb duct, motor spindle is connected with the axis of rotation, the axis of rotation injects in the honeycomb duct, the screw is installed in the axis of rotation, dispose the heater outside the barrel, draw forth fluid-discharge tube and feed liquor pipe respectively from barrel upper portion and lower part, the heater inlet is connected to the fluid-discharge tube, the heater liquid outlet is connected to the feed liquor union coupling, draw forth the steam pipe at the barrel top, the outside cooler of barrel is connected to the steam pipe, a serial communication port: an upper stirring blade is arranged above the guide pipe on the rotating shaft, an annular liquid suction pipe is arranged above the upper stirring blade, and a plurality of liquid suction nozzles are arranged at the bottom of the annular liquid suction pipe at intervals.

2. The DTB crystallizer special for producing ferric nitrate of claim 1, wherein the lower tube body of the draft tube is in a trumpet-shaped structure.

3. The DTB crystallizer special for producing ferric nitrate according to claim 1 or 2, wherein a lower stirring blade is arranged below the guide pipe.

4. The DTB crystallizer special for producing ferric nitrate according to claim 1, wherein a plurality of spiral flow deflectors are arranged on the circumferential wall body of the cylinder body at intervals from top to bottom.

5. The DTB crystallizer special for producing iron nitrate according to claim 1, wherein the heater comprises a flow dividing chamber, a heat exchange chamber and a flow converging chamber, the flow dividing chamber and the flow converging chamber are respectively arranged at two ends of the heat exchange chamber, a plurality of heat exchange tubes are arranged in the heat exchange chamber and are communicated with the flow dividing chamber and the flow converging chamber, and a steam inlet and a cooling water outlet are respectively arranged at two sides of the heat exchange chamber.

6. The DTB crystallizer special for producing ferric nitrate of claim 1, wherein the cooler is a spray cooler, the upper part of the inner cavity of the cooler is provided with a spray header, the corresponding side wall is provided with a cold water supply pipe, the cold water supply pipe supplies cold water to the spray header, a steam pipe is connected between the lower part of the cooler and the top of the cylinder, and the bottom of the cooler is provided with a water outlet.