CN204824149U - Hydrochloric acid recovery unit of amino acid is produced to acid system - Google Patents

Abstract

The utility model discloses a hydrochloric acid recovery device for producing amino acid by an acid method, which belongs to the technical field of amino acid production. Among them, the amino acid production system includes a hydrolysis reactor, a concentrator, an alkali neutralization reactor, a sedimentation tank, a first plate and frame filter press, and a dissolution tank, etc., and the hydrochloric acid recovery device includes a reflux condenser, a vacuum structure, a condensation The reflux condenser is set on the top of the hydrolysis reaction kettle and its gas outlet is connected to the inlet of the condenser. The gas outlet of the condenser is connected to the vacuum pumping structure. The waste gas inlet of the water washing tower is connected to the alkali It is connected to the exhaust port of the reaction kettle, the outlet of the dilute acid of the water washing tower, the outlet of the condensed water of the concentrator and the liquid outlet of the condenser are all connected to the inlet of the dilute acid storage tank, the outlet of the dilute acid storage tank and the inlet of the dissolution tank Feed port connection. The device can recycle the waste hydrochloric acid again, and use the recovered dilute hydrochloric acid to dissolve the precipitate obtained by alkali neutralization. The dissolution effect is very good, which not only reduces the cost, but also reduces environmental pollution.

Description

A hydrochloric acid recovery device for amino acid production by acid method

technical field

The utility model relates to the technical field of amino acid production, in particular to a hydrochloric acid recovery device for producing amino acid by an acid method.

Background technique

Due to the huge demand for poultry meat products in the global market, a large amount of feathers are produced during poultry slaughtering and processing, resulting in millions of tons of feather waste every year. If these feathers are discarded directly, they will rot and degrade under natural conditions for a long time and rot The smell pollutes the environment; such as incinerating and landfilling requires a lot of manpower and material resources, it may also cause secondary pollution and waste precious resources. Since feathers contain a large amount of protein, degrading them into amino acids by chemical methods not only avoids the pollution of feather waste, but also has good economic benefits. It is the best way to deal with feathers at present.

At present, the conventional method of degrading feathers into amino acids is the acid hydrolysis method. The acid hydrolysis method sends the feathers into the acid hydrolysis tank after physical treatment, and obtains the cystine product after repeated neutralization and decolorization. The process includes hydrolysis, concentration, alkali Neutralization, mother separation, acid neutralization, primary decolorization, secondary decolorization, ammonia neutralization and cystine refining, etc.

When the applicant realized the above process, he found that a large amount of waste gas containing HCl would be generated in the process of hydrolysis, concentration and alkali neutralization, and the treatment cost was high.

Contents of the invention

In order to solve the above problems, the purpose of this utility model is to provide a hydrochloric acid recovery device for amino acid production by acid method, which can recycle waste hydrochloric acid, which not only reduces the cost, but also reduces environmental pollution. Described technical scheme is as follows:

The embodiment of the utility model provides a hydrochloric acid recovery device for amino acid production by an acid method, wherein the amino acid production system includes a hydrochloric acid recovery device and a hydrolysis reaction kettle, a concentrator, an alkali neutralization reaction kettle, a sedimentation tank, and a first plate Frame filter press, dissolution tank, acid neutralization reaction kettle, second plate and frame filter press, first decolorization reaction kettle, third plate and frame filter press, second decolorization reaction kettle, fourth plate and frame filter press, Ammonia neutralization reactor and first centrifuge, etc. Wherein, the hydrochloric acid recovery device is connected with the hydrolysis reaction kettle, the first concentrator, the alkali neutralization reaction kettle and the dissolution tank for recovering the dilute hydrochloric acid discharged from the hydrolysis reaction kettle, the concentrator and the alkali neutralization reaction kettle. More specifically, the hydrochloric acid recovery device includes a reflux condenser, a vacuum structure, a condenser, a dilute acid storage tank, a water washing tower, and the like. Among them, the reflux condenser is set on the top of the hydrolysis reaction kettle and its gas outlet is connected to the inlet of the condenser, the gas outlet of the condenser is connected to the vacuum structure, and the waste gas inlet of the water washing tower is connected to the exhaust port of the alkali neutralization reaction kettle , the dilute acid outlet of the washing tower, the condensed water outlet of the concentrator (the condensed water contains a small amount of dilute hydrochloric acid) and the liquid outlet of the condenser are all connected to the inlet of the dilute acid storage tank, the outlet of the dilute acid storage tank and the inlet of the dissolution tank The feed port connection is used to dissolve the filter residue obtained by the first plate and frame filter press with recovered dilute hydrochloric acid.

Wherein, the reflux condensing pipe is used for cooling steam, and the hydrochloric acid is refluxed into the hydrolysis reaction kettle, specifically, it can be a spherical, serpentine or straight structure, preferably a serpentine reflux condensing pipe. Wherein, the condenser is a common condenser used for recovery. Among them, the vacuum pumping structure is a vacuum pump, and the washing tower is a circulating washing tower with a spray head and a concentration meter inside. When the concentration reaches a certain value, the washing acid is sent to the dilute acid storage tank. Furthermore, an alkali washing structure is provided between the condenser and the vacuum structure to reduce the corrosion of the acid-containing waste gas on the vacuum structure.

Wherein, the descriptions of "first", "second", ..., etc. in the above description are only used for distinction, for convenience of description, and have no other special meaning.

The beneficial effect of the technical solution provided by the embodiment of the utility model is that the embodiment of the utility model provides a hydrochloric acid recovery device for producing amino acids by an acid method, which can recycle the waste hydrochloric acid and use the recovered dilute hydrochloric acid to dissolve the alkali The precipitation obtained by neutralization has a very good dissolution effect, which not only reduces the cost, but also reduces environmental pollution.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is a structural block diagram of a hydrochloric acid recovery device for amino acid production by an acid method provided by an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings.

Referring to Fig. 1, the embodiment of the utility model provides a hydrochloric acid recovery device for producing amino acid by acid method, wherein the amino acid production system includes a hydrochloric acid recovery device and a hydrolysis reaction kettle 1, a concentrator 2, and an alkali neutralization reaction kettle 3 arranged in sequence , sedimentation tank 4, first plate and frame filter press 5, dissolution tank 6, acid neutralization reaction kettle, second plate and frame filter press, first decolorization reaction kettle, third plate and frame filter press, second decolorization reaction kettle, the fourth plate and frame filter press, ammonia neutralization reaction kettle and the first centrifuge, etc. Wherein, the hydrochloric acid recovery device is connected with the hydrolysis reactor 1, the first concentrator 2, the alkali neutralization reactor 3 and the dissolution tank 6 to reclaim the dilute hydrochloric acid discharged from the hydrolysis reactor 1, the concentrator 2 and the alkali neutralization reactor 3 . More specifically, the hydrochloric acid recovery device includes a reflux condenser 7, a vacuum structure 8, a condenser 9, a dilute acid storage tank 10, a water washing tower 11, and the like. Wherein, the reflux condensing pipe 7 is arranged on the top of the hydrolysis reaction kettle 1 and the gas outlet of the reflux condensing pipe 7 is connected with the inlet of the condenser 9 . Wherein, the air outlet of condenser 9 is connected with vacuum pumping structure 8, the waste gas inlet of water washing tower 11 is connected with the exhaust port of alkali neutralization reactor 3, the dilute acid outlet of water washing tower 11, the condensed water outlet of concentrator 2 and The liquid outlets of the condenser 2 are all connected to the inlet of the dilute acid storage tank 10 , and the outlet of the dilute acid storage tank 10 is connected to the feed inlet of the dissolution tank 6 .

Wherein, the reflux condensing pipe 7 in the embodiment of the utility model is used for cooling the steam and returning the hydrochloric acid to the hydrolysis reactor 1, which can be spherical, serpentine or straight, preferably a serpentine reflux condensing pipe. Wherein, the condenser 9 is a common condenser used for recovery. Wherein, the vacuum structure 8 is a vacuum pump, wherein, the water washing tower 11 is a circulating water washing tower with a spray head and a concentration meter inside, and when the concentration reaches a certain value, the washing acid is sent into the dilute acid storage tank 10. Further, referring to FIG. 1 , an alkali cleaning structure 12 is provided between the condenser 9 and the vacuum structure 8 to reduce acid corrosion on the vacuum structure 8 .

The embodiment of the utility model provides a hydrochloric acid recovery device for producing amino acids by an acid method. The device can recycle waste hydrochloric acid and use the recovered dilute hydrochloric acid to dissolve the precipitate obtained by alkali neutralization. The dissolution effect is very good, not only reducing the cost and reduce environmental pollution.

The specific embodiments of the utility model described above do not constitute a limitation to the protection scope of the utility model. Any other corresponding changes and deformations made according to the technical concept of the utility model shall be included in the protection scope of the claims of the utility model.

Claims (4)

1. A hydrochloric acid recovery device for producing amino acid by an acid method, said amino acid production system comprising a hydrolysis reactor, a concentrator, an alkali neutralization reactor, a settling tank, the first plate and frame filter press and a dissolving tank arranged successively, wherein It is characterized in that the hydrochloric acid recovery device includes a reflux condenser, a vacuum structure, a condenser, a dilute acid storage tank and a water washing tower, and the reflux condenser is arranged on the top of the hydrolysis reaction kettle and its gas outlet is connected to the inlet of the condenser , the gas outlet of the condenser is connected with the vacuum pumping structure, the exhaust gas inlet of the water washing tower is connected with the exhaust port of the alkali neutralization reactor, the dilute acid outlet of the water washing tower, the condensed water outlet of the concentrator and the condensing The liquid outlets of the devices are all connected to the inlets of the dilute acid storage tanks, and the outlets of the dilute acid storage tanks are connected to the feed ports of the dissolution tanks. 2. The hydrochloric acid recovery device for amino acid production by acid method according to claim 1, characterized in that, the reflux condenser is a serpentine reflux condenser. 3. The hydrochloric acid recovery device for amino acid production by acid method according to claim 1, characterized in that, the device further comprises an alkali cleaning structure arranged between the condenser and the vacuuming structure. 4. The hydrochloric acid recovery device for producing amino acid by acid method according to claim 1, characterized in that, the water washing tower is a circulating water washing tower on which a concentration meter is arranged.