CN208031958U - A kind of benzoic acid purified crystals device - Google Patents

Abstract

The utility model is related to chemical equipment technical fields, disclose a kind of benzoic acid purified crystals device, including tube type mold, first electric heating conduction oil furnace, second electric heating conduction oil furnace, control panel, the tube type mold includes being arranged above and below and feed zone spaced apart from each other, heating zone, discharge zone, the top of the feed zone is equipped with feed inlet, tripper is equipped in the feed inlet, the top of the tripper is equipped with strainer, the lower part of tripper is connected to sub-feed tube, the sub-feed tube is connected to the top of the crystallizer set on heating zone, the lower part of the crystallizer is connected to discharge zone, array is equipped with storage block on the crystallizer, the bottom of the heating zone is equipped with hot oil inlet, the top of the heating zone is equipped with hot oil outlet, the bottom of the discharge zone is equipped with discharge port.The utility model has the beneficial effects that operating cost is low, product purity is high.

Description

A kind of benzoic acid purified crystals device

Technical field

The utility model is related to chemical equipment technical field, especially a kind of benzoic acid purified crystals device.

Background technology

Benzoic acid is a kind of fine chemical product, is divided into food-grade, pharmaceutical grade and technical grade, also known as styrax according to purposes Acid, flakey or acicular crystal, the smell with benzene or formaldehyde, 122 DEG C of fusing point, 249 DEG C of boiling point are slightly soluble in water, be dissolved in ethyl alcohol, In the organic solvents such as methanol, ether.Generally used frequently as drug or preservative, have inhibit fungi, bacterium, fungus growth work With being usually coated on skin when medicinal, to treat the skin disease of tinea class.In addition, it may also be used for synthetic fibers, resin, painting Material, rubber etc..The industrial process of benzoic acid is mainly by toluene liquid-phase air oxidation process, benzotrichloride Hydrolyze method, adjacent benzene two Formic anhydride decarboxylation method, benzyl zirconyl oxyhalides method etc., purity >=98% of benzoic acid, containing the impurity for being not easy to remove, it is in micro- Huang to make product Or micro- green.As dosage of the benzoic acid in medicine and feed increases considerably, food, the demand of pharmaceutical grade benzoic acid are more next It is bigger, the benzoic acid produced by toluene liquid-phase air oxidation process can further be refining to obtain food, pharmaceutical grade benzoic acid.Food The purity needs >=99.5% of product, pharmaceutical grade benzoic acid.Domestic many producers use water-soluble crystallisation production high-purity at present Benzoic acid, technical grade benzoic acid is molten in boiling water, then decrease temperature crystalline, centrifugation, drying, obtained finished product pharmaceutical grade benzoic acid Content is high, white color.Product 50ppm containing impurity obtained is hereinafter, effectively remove biphenyl dicarboxylic acid, phenol in aforementioned manners Equal impurity.But this method generates a large amount of waste water, and solubility of the benzoic acid in boiling water only has 10% (mass ratio) left and right often to give birth to About 9 tons of waste water will be discharged in one ton of finished acid of production, and waste water will take away a large amount of benzoic acid and its derivative, and three-waste pollution is big, former High material consumption, production cost is high, and equipment investment is high, and efficiency is low, costly, and it is difficult that finished product purity further walks raising.Therefore, it seeks It asks a kind of equipment investment few, meets environmental requirement, the low benzoic acid purified crystals device of production cost becomes benzoic acid production enterprise The eager desire of industry.

Utility model content

Purpose of the utility model is to solve the above problems, and it is pure to devise a kind of benzoic acid using fused junction crystallization Change crystallization apparatus.

Realize that above-mentioned purpose the technical solution of the utility model is a kind of benzoic acid purified crystals device, including tubular type knot Brilliant device, the first electric heating conduction oil furnace, the second electric heating conduction oil furnace, control panel, the tube type mold include arranging up and down It arranges and feed zone spaced apart from each other, heating zone, discharge zone, the top of the feed zone is equipped with feed inlet, in the feed inlet Equipped with tripper, the top of the tripper is equipped with strainer, and the lower part of tripper is connected to sub-feed tube, the sub-feed tube be set to The top of the crystallizer of heating zone is connected to, and the lower part of the crystallizer is connected to discharge zone, and array is equipped with storage on the crystallizer Block is hidden, the bottom of the heating zone is equipped with hot oil inlet, and the top of the heating zone is equipped with hot oil outlet, the bottom of the discharge zone Portion is equipped with discharge port, and the feed inlet is connected to the discharge end on feeder channel top by feeding pipe, is set on the feeding pipe There are charging pump, the lower part of the feeder channel to be equipped with feed end, the external of the feeder channel wraps up hot oil pipeline, the hot oil pipeline Be connected to the first electric heating conduction oil furnace by circulation line, the circulation line be equipped with cycling hot oil pump, the deep fat into Mouth is connected to the oil extraction end of the second electric heating conduction oil furnace, and the oil inlet end of the hot oil outlet and the second electric heating conduction oil furnace connects Logical, oil-drain pipe is equipped with cycling hot oil pump, and the discharge port is connected to by discharge pipe with stock chest, and the discharge pipe is set There are the first solenoid valve and second solenoid valve.

Further, the discharge pipe is also connected to feed back pipeline and drainage line, the feed back pipeline, drainage line It is equipped between the first solenoid valve and second solenoid valve, the feed back pipeline is connected to the feed back end of feeder channel, the feed back pipe Road is equipped with third solenoid valve and the pump housing, and the drainage line is connected to circulating cooling device, and the drainage line is equipped with the Four solenoid valves and the pump housing.

Further, the charging pump, cycling hot oil pump, the first solenoid valve, second solenoid valve, third solenoid valve, the 4th Solenoid valve, the pump housing are electrically connected with control panel.

The benzoic acid purified crystals device made using the technical solution of the utility model, advantage are：Pass through Fused junction crystallization crystallizes after melting solid benzoic acid, easy to operate equipped with the electric heating conduction oil furnace that can adjust temperature, peace Whole step is high, and crystallizer is equipped with storage block, and crystallization, which generates, to be generated in storage block, will not be crystallized because of the Turbulent Flow Effects in pipeline Shape, the recyclable flowing of volume benzoic acid molten liquid in pipeline, waste is few, and the Benzoic Acid Crystal purity obtained is high.

Description of the drawings

Fig. 1 is the structural schematic diagram of the utility model；

In figure, 1, tube type mold；2, the first electrical heating heat conducting furnace；3, the second electrical heating heat conducting furnace；4, feed zone；5, add Hot-zone；6, discharge zone；7, feed inlet；8, tripper；9, strainer；10, sub-feed tube；11, crystallizer；12, storage block；13, deep fat Import；14, hot oil outlet；15, discharge port；16, feeding pipe；17, feeder channel；18, discharge end；19, charging pump；20, it feeds End；21, hot oil pipeline；22, circulation line；23, cycling hot oil pump；24, oil extraction end；25, oil inlet end；26, discharge pipe；27, Stock chest；28, the first solenoid valve；29, second solenoid valve；30, feed back pipeline；31, drainage line；32, feed back end；33, third Solenoid valve；34, the 4th solenoid valve.

Specific implementation mode

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work The every other embodiment obtained, shall fall within the protection scope of the present invention.

The utility model provides a kind of benzoic acid purified crystals device as shown in Figure 1, including tube type mold 1, One electric heating conduction oil furnace 2, the second electric heating conduction oil furnace 3, control panel, the tube type mold 1 include being arranged above and below simultaneously And feed zone 4 spaced apart from each other, heating zone 5, discharge zone 6, the top of the feed zone 4 are equipped with feed inlet 7, the feed inlet 7 Interior to be equipped with tripper 8, the top of the tripper 8 is equipped with strainer 9, and the lower part of tripper 8 is connected to sub-feed tube 10, described point Expects pipe 10 is connected to the top of the crystallizer 11 set on heating zone 5, and the lower part of the crystallizer 11 is connected to discharge zone 6, described Array is equipped with storage block 12 on crystallizer 11, and the bottom of the heating zone 5 is equipped with hot oil inlet 13, the top of the heating zone 5 Equipped with hot oil outlet 14, the bottom of the discharge zone 6 is equipped with discharge port 15, and the feed inlet 7 passes through feeding pipe 16 and feed The discharge end 18 on 17 top of slot is connected to, and the feeding pipe 16 is equipped with charging pump 19, the lower part of the feeder channel 17 be equipped with into Expect that hot oil pipeline 21 is wrapped up at end 20, the external of the feeder channel 17, the hot oil pipeline 21 passes through circulation line 22 and the first electricity It heats heat-conducting oil furnace 2 to be connected to, the circulation line 22 is equipped with cycling hot oil pump 23, the hot oil inlet 13 and the second electrical heating The oil extraction end 24 of heat-conducting oil furnace 3 is connected to, and the hot oil outlet 14 is connected to the oil inlet end 25 of the second electric heating conduction oil furnace 3, is arranged Oil-piping is equipped with cycling hot oil pump 23, and the discharge port 15 is connected to by discharge pipe 26 with stock chest 27, the discharge nozzle Road 26 is equipped with the first solenoid valve 28 and second solenoid valve 29.It is equal that wherein first heating heat-conducting oil furnace 2 and second heats heat-conducting oil furnace 3 It is commercially available, is equipped with digital display type temperature controller, it can be with manual adjustment temperature.

Preferably, the discharge pipe 26 is also connected to feed back pipeline 30 and drainage line 31, the feed back pipeline 30, row Pipe material 31 is equipped between the first solenoid valve 28 and second solenoid valve 29, the feed back end of the feed back pipeline 30 and feeder channel 17 32 connections, the feed back pipeline 30 are equipped with third solenoid valve 33 and the pump housing, and the drainage line 31 connects with circulating cooling device Logical, the drainage line 31 is equipped with the 4th solenoid valve 34 and the pump housing.

Preferably, the charging pump 19, cycling hot oil pump 23, the first solenoid valve 28, second solenoid valve 29, third solenoid valve 33, the 4th solenoid valve 34, the pump housing are electrically connected with control panel (being not drawn into control panel figure), are controlled by control panel Each solenoid valve and the pump housing.

When specifically used：Benzoic acid solid enters from the feed end 20 of feeder channel 17, by controlling the first electrical heating heat conduction Deep fat is warming up to 124 DEG C and is recycled in circulation line 22 and hot oil pipeline 21 under the action of cycling hot oil pump 23 by oil oven 2, To all melt benzoic acid solid, charging pump 19 is opened, knot is entered after filter screen 9, tripper 8 by feeding pipe 16 In brilliant pipe 11, the second electric heating conduction oil furnace 3 is adjusted, heat conduction oil temperature is slowly cooled down by 124 DEG C, until crystallizer Benzoic acid molten liquid in 11 starts to crystallize, and major part nucleus ensconces in storage block 12 turbulent flow in crystallizer 11 in this way when crystallization Crystallization will not be destroyed, when generating 50% or so crystallization, opens the first solenoid valve 28, the 4th solenoid valve 34 and drainage line 31 On the pump housing, benzoic acid mother liquor is discharged, closes above-mentioned solenoid valve after discharge, control the second electric heating conduction oil furnace 3, by it Temperature slowly rises to 124 DEG C, and crystals melt is opened the first solenoid valve 28 and second solenoid valve 29 after thawing, the knot of melting It is spare that crystalline substance enters stock chest 27, can also be transported in feeder channel 17 when benzoic acid mother liquor is discharged, that is, open third The pump housing in solenoid valve 23 and feed back pipeline 30.

Finally it should be noted that：The above descriptions are merely preferred embodiments of the present invention, is not limited to this Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art For, it still can be with technical scheme described in the above embodiments is modified, or to which part technical characteristic Equivalent replacement is carried out, within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on, It should be included within the scope of protection of this utility model.

Claims (3)

1. a kind of benzoic acid purified crystals device, including tube type mold, the first electric heating conduction oil furnace, the second electrical heating heat conduction Oil oven, control panel, which is characterized in that the tube type mold includes being arranged above and below and feed zone spaced apart from each other, heating The top of area, discharge zone, the feed zone is equipped with feed inlet, and tripper, the top of the tripper are equipped in the feed inlet Equipped with strainer, the lower part of tripper is connected to sub-feed tube, and the sub-feed tube is connected to the top of the crystallizer set on heating zone, institute The lower part for stating crystallizer is connected to discharge zone, and array is equipped with storage block on the crystallizer, and the bottom of the heating zone is equipped with heat The top of oil inlet, the heating zone is equipped with hot oil outlet, and the bottom of the discharge zone is equipped with discharge port, and the feed inlet passes through Feeding pipe is connected to the discharge end on feeder channel top, and the feeding pipe is equipped with charging pump, and the lower part of the feeder channel is set There are feed end, the external of the feeder channel to wrap up hot oil pipeline, the hot oil pipeline is led by circulation line and the first electrical heating Hot oil furnace is connected to, and the circulation line is equipped with cycling hot oil pump, the row of the hot oil inlet and the second electric heating conduction oil furnace Oily end connection, the hot oil outlet are connected to the oil inlet end of the second electric heating conduction oil furnace, and oil-drain pipe is equipped with circulating hot oil Pump, the discharge port are connected to by discharge pipe with stock chest, and the discharge pipe is equipped with the first solenoid valve and second solenoid valve.

2. a kind of benzoic acid purified crystals device according to claim 1, which is characterized in that the discharge pipe also with return Pipe material is connected to drainage line, and the feed back pipeline, drainage line are equipped between the first solenoid valve and second solenoid valve, institute It states feed back pipeline to be connected to the feed back end of feeder channel, the feed back pipeline is equipped with third solenoid valve and the pump housing, the drainage conduit Road is connected to circulating cooling device, and the drainage line is equipped with the 4th solenoid valve and the pump housing.

3. a kind of benzoic acid purified crystals device according to claim 2, which is characterized in that the charging pump, cycling hot Oil pump, the first solenoid valve, second solenoid valve, third solenoid valve, the 4th solenoid valve, the pump housing are electrically connected with control panel.