CN114180994B - Production process and equipment for large-particle ammonium sulfate product - Google Patents
Production process and equipment for large-particle ammonium sulfate product Download PDFInfo
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- CN114180994B CN114180994B CN202111649509.5A CN202111649509A CN114180994B CN 114180994 B CN114180994 B CN 114180994B CN 202111649509 A CN202111649509 A CN 202111649509A CN 114180994 B CN114180994 B CN 114180994B
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/24—Sulfates of ammonium
- C01C1/242—Preparation from ammonia and sulfuric acid or sulfur trioxide
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/20—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for preventing the fertilisers being reduced to powder; Anti-dusting additives
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The invention relates to the technical field of large-particle ammonium sulfate production, in particular to a production process and equipment of a large-particle ammonium sulfate product, wherein the process comprises the following steps: firstly, carrying out neutralization reaction on sulfuric acid, ammonia and washing liquid from a gas-liquid separator, spraying slurry formed after the reaction into a granulator, spraying granulation binder into a solid material bed through a spray nozzle, and then spraying ammonia for granulation to form solid wet materials and granulation tail gas; drying the solid wet material, and grading the dried material in a sieving machine; screening out qualified particles, and directly cooling to obtain a large-particle ammonium sulfate product; the equipment comprises a gas-liquid separation device, a fixed support frame, a screening device and a charging reaction device. The invention realizes the large granulation of the ammonium sulfate, the tubular reactor has full utilization of reaction heat and short reaction time, can properly reduce the production cost of the large-particle ammonium sulfate, has certain direct economic benefit, and has the advantages of easy control of process conditions, convenient operation and good product quality.
Description
Technical Field
The invention relates to the technical field of large-particle ammonium sulfate production, in particular to a production process and equipment of a large-particle ammonium sulfate product.
Background
The pure product of ammonium sulfate is colorless transparent orthorhombic crystal, and the aqueous solution is acidic. Insoluble in alcohol, acetone and ammonia. Has moisture absorption property, and can be solidified into blocks after moisture absorption. Heating to 513 deg.C to decompose ammonia gas, nitrogen gas, sulfur dioxide and water. Ammonia gas is released when the ammonia gas reacts with alkalis. Reacting with barium chloride solution to generate barium sulfate precipitate. The protein may also be salted out.
According to Chinese patent No. CN201611115585.7, a method for producing large-particle ammonium sulfate comprises the following steps: step 1: mixing the slurry generated in the process of producing industrial phosphoric acid by wet-process phosphoric acid with sulfuric acid and tail washing liquid according to the proportion of 0.5-3: 10: 0.1-3 to prepare mixed acid; step 2: adding gas ammonia or liquid ammonia or ammonia water into the mixed acid, and performing neutralization reaction to obtain ammonium sulfate slurry; and step 3: feeding the ammonium sulfate slurry into a granulator, granulating and drying; and 4, step 4: sieving and grading the large-particle ammonium sulfate obtained by granulation; and 5: sieving to obtain ammonium sulfate granules with particle size of 2-4.5mm, processing to obtain finished product, and packaging; step 6: and after the screened dust-containing tail gas is circularly washed by water, adding sulfuric acid into washing water according to the ratio of 4-5: 1 to convert into dilute sulfuric acid, washing the granulated ammonia-containing tail gas, and washing the ammonia-containing tail gas by the dilute sulfuric acid to obtain tail washing liquid containing sulfuric acid and ammonium sulfate for preparing mixed acid.
According to chinese patent No. CN200920187960.8 an ammonium sulfite chemical fertilizer production system, the utility model discloses an ammonium sulfite chemical fertilizer production system, including desulfurizing tower, ammonium sulfite circulating pump, ammonium sulfite mixer, stiff ware and centrifuge, the desulfurizing tower include flue gas entry and the mixed liquid export of ammonium sulfite, the ammonium sulfite mixer include mixed liquid entry of ammonium sulfite, gas ammonia entry and the export of ammonium sulfite solution; the thickener comprises an ammonium sulfite solution inlet, an ammonium sulfite solution outlet and a mother liquor outlet; the centrifuge comprises an ammonium sulfite solution inlet, an ammonium sulfite crystal outlet and a mother liquor outlet; and the ammonium sulfite circulating pump conveys the ammonium sulfite mixed solution in the desulfurization tower to the ammonium sulfite mixer, an ammonium sulfite solution outlet of the ammonium sulfite mixer is communicated with an ammonium sulfite solution inlet of the thickener, and an ammonium sulfite solution outlet of the thickener is communicated with an ammonium sulfite solution inlet of the centrifuge. The utility model relates to an ammonium sulfite chemical fertilizer production system with less equipment, low energy consumption and low operation cost.
However, the production equipment of the existing large-particle ammonium sulfate product cannot rapidly produce, process and manufacture large-particle ammonium sulfate feces with high quality in the using process, and the regulation and control in the process of manufacturing large-particle ammonium sulfate are inconvenient, and the streamlined rapid production and manufacture cannot be realized, so that a production process and equipment of the large-particle ammonium sulfate product are needed to solve the problems provided in the above.
Disclosure of Invention
The invention aims to provide a production process and equipment of a large-particle ammonium sulfate product, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a production process of a large-particle ammonium sulfate product comprises the following steps:
s1, adding sulfuric acid, ammonia and washing liquid from a gas-liquid separator into a tubular reactor for neutralization reaction, spraying slurry formed after reaction into a granulator, spraying granulation binder into a solid material bed through a spray nozzle, and spraying ammonia for granulation to form solid wet materials and granulation tail gas, wherein the granulation temperature is 80-110 ℃, and the water content of the solid wet materials at the outlet of the granulator is 3-5%;
s2, enabling the granulated tail gas to enter a gas-liquid separator and fully atomizing and mixing washing liquid from a circulating pump of the gas-liquid separator in a Venturi ejector, enabling a gas-liquid mixture to enter the gas-liquid separator for separation, enabling the washing liquid to be mixed with the granulated tail gas through the circulating pump to recycle ammonia and dust, conveying the mixture to a tubular reactor through a conveying pump, pressurizing the separated gas through a fan, and then enabling the gas to enter a cyclone washing tower for further washing;
s3, feeding dry tail gas from a fan and gas from a gas-liquid separator into a cyclone washing tower, adding sulfuric acid and water, keeping the liquid level of the gas-liquid separator balanced to form washing liquid of the cyclone washing tower, and spraying and washing the tail gas entering the tower by the washing liquid through a circulating pump;
s4, drying the solid wet material, wherein the temperature of the drying hot air is 110-175 ℃, and grading the dried material in a sieving machine;
s5, crushing the screened large particles by a crusher and returning the screened fine powder serving as a return material to a granulator; and screening out qualified particles, and directly cooling to obtain a large-particle ammonium sulfate product.
A production process and equipment for large-particle ammonium sulfate products comprise a gas-liquid separation device, a fixed support frame, a screening device and a feeding reaction device, wherein the fixed support frame is fixedly connected to two sides of the gas-liquid separation device;
the feeding reaction device comprises a quantity control device, an air pump, a connecting pipe, a fixed mounting disc, a tubular reactor and a feed hopper, wherein the fixed mounting disc is fixedly mounted in the middle of the tubular reactor;
the measuring cylinder is uniformly and fixedly arranged on the edge of the upper end of the mounting supporting plate, and the scale marks are arranged on the outer wall of the measuring cylinder;
the gas-liquid separation device comprises a granulator, a fan, a storage frame, a first discharge pipe, a material receiving bed, spray heads, an ammonia spraying shaft, a sealing cover, a gas-liquid separator and a second discharge pipe, wherein the material receiving bed is fixedly connected to the upper end of the granulator, the sealing cover is fixedly connected to the upper portion of the bottom end of the granulator, the spray heads are uniformly and fixedly distributed in the two sides of the material receiving bed, the ammonia spraying shaft is fixedly installed in the bottom end of the material receiving bed, the gas-liquid separator is fixedly installed in the bottom end of the granulator, the sealing cover is installed outside the gas-liquid separator in a sealing mode, the fan is fixedly connected to one end of the gas-liquid separator and one end of the sealing cover, the storage frame is fixedly connected to the outer end of the fan, the first discharge pipe is fixedly connected to the outer end of the storage frame, and the second discharge pipe is fixedly connected to the middle of one end, away from the fan, of the gas-liquid separator;
screening plant includes conveying pipeline, desiccator, automatically controlled valve, joint support frame and screening machine, screening machine fixed mounting is in the inside of joint support frame, the conveying pipeline passes through joint support frame fixed connection at the front end middle part of screening machine, desiccator and automatically controlled valve fixed mounting are in the inside of conveying pipeline, just automatically controlled valve is located between desiccator and the screening machine.
Preferably, the bottom end of the tubular reactor is located directly above the receiving bed.
Preferably, the number of the measuring cylinders is six, and the bottom ends of the six measuring cylinders are communicated with the interior of the tubular reactor through mounting support plates.
Preferably, the two ends of the fixed mounting disc are fixedly connected with the upper end of the fixed support frame, the inner side of the bottom end of the fixed support frame is fixedly connected with the outer side of the granulator, and the connecting support frame is fixedly connected with the fixed support frame.
Preferably, the second discharge pipe is connected to the connection pipe through a hose.
Preferably, the feed hopper is arranged in an inclined manner, and one end of the feed hopper inserted into the tubular reactor is a lower end.
Preferably, the conveying pipeline is arranged in an inclined manner, the lower end of the conveying pipeline is inserted into one end of the screening machine, and the granulating machine is connected with the screening machine through the conveying pipe.
Preferably, the outer end of the fixed support frame is symmetrically and fixedly provided with a support plate, a guide discharge plate is fixedly arranged in the front end of the support plate, a discharge groove is formed in the guide discharge plate, the guide discharge plate is arranged in an inclined manner of 45 degrees, and the guide discharge plate is positioned under the sieving machine.
Preferably, the granulation binder in step S1 includes the following components in parts by weight: 30-50 parts of urea-formaldehyde resin, 6-10 parts of sodium lignosulfonate, 15-25 parts of starch, 0.4-0.8 part of sodium carboxymethylcellulose and 20-40 parts of water.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the liquid reagent can be accurately added into the tubular reactor by arranging the quantity control device, and the solid material body can be added into the tubular reactor by the feed hopper, so that the addition amount of the material body is accurate and convenient in the production process of large-particle ammonium sulfate products, and the quality of processed products is excellent.
Secondly, the gas-liquid separation device can quickly separate gas and liquid, and the separated liquid can conveniently flow back to the inside of the tubular reactor again to be produced and processed.
The screening device is arranged, so that the particle size of the produced product meets the requirement, and the produced large-particle ammonium sulfate particles are uniform and meet the requirement.
The invention provides the method which takes the ammonium sulfate as the main raw material by utilizing the tubular reactor process, realizes the large granulation of the ammonium sulfate, has full utilization of the reaction heat of the tubular reactor and short reaction time, can further properly reduce the production cost of the large-particle ammonium sulfate, has certain direct economic benefit, and has the advantages of easily controlled process conditions, convenient operation and good product quality.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of the production process of the present invention;
FIG. 2 is a schematic view of the main structure of the present invention;
FIG. 3 is a side view of the body of the present invention;
FIG. 4 is a schematic view of the structure of a feed reaction apparatus according to the present invention;
FIG. 5 is a side view of the feed reaction apparatus of the present invention;
FIG. 6 is a schematic structural view of a quantity control device according to the present invention;
FIG. 7 is a schematic view showing the structure of a gas-liquid separating apparatus according to the present invention;
FIG. 8 is a schematic view of the inside of the gas-liquid separating apparatus of the present invention;
FIG. 9 is a side view of the gas-liquid separating apparatus of the present invention;
FIG. 10 is a schematic diagram of the construction of the screening device of the present invention;
fig. 11 is a schematic structural diagram of a second embodiment of the main body of the present invention.
In the figure: 1-a gas-liquid separation device, 2-a fixed support frame, 3-a screening device, 4-a feeding reaction device, 5-a quantity control device, 6-an air pump, 7-a connecting pipe, 8-a fixed mounting disc, 9-a tubular reactor, 10-a feed hopper, 11-a mounting supporting plate, 12-a scale mark, 13-a measuring cylinder, 14-a granulator, 15-a fan, 16-a storage frame, 17-a first discharge pipe, 18-a receiving bed, 19-a spray head, 20-an ammonia spraying shaft, 21-a sealing cover, 22-a gas-liquid separator, 23-a second discharge pipe, 24-a feed conveying pipe, 25-a dryer, 26-an electric control valve, 27-a connecting support frame, 28-a screening machine, 29-a support plate, 30-a guide discharge plate, 31-discharge tank.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is further described below with reference to the accompanying drawings.
Example 1
A large-particle ammonium sulfate product is shown in figure 1, and the production process comprises the following steps:
s1, adding sulfuric acid, ammonia and a washing liquid from a gas-liquid separator into a tubular reactor for neutralization reaction, spraying slurry formed after reaction into a granulator, spraying a granulation binder into a solid material bed through a spray nozzle, and spraying ammonia for granulation to form a solid wet material and granulation tail gas, wherein the granulation temperature is 80 ℃, and the water content of the solid wet material at the outlet of the granulator is 3%;
s2, enabling the granulated tail gas to enter a gas-liquid separator and fully atomizing and mixing washing liquid from a circulating pump of the gas-liquid separator in a Venturi ejector, enabling a gas-liquid mixture to enter the gas-liquid separator for separation, enabling the washing liquid to be mixed with the granulated tail gas through the circulating pump to recycle ammonia and dust, conveying the mixture to a tubular reactor through a conveying pump, pressurizing the separated gas through a fan, and then enabling the gas to enter a cyclone washing tower for further washing;
s3, feeding dry tail gas from a fan and gas from a gas-liquid separator into a cyclone washing tower, adding sulfuric acid and water, keeping the liquid level of the gas-liquid separator balanced to form washing liquid of the cyclone washing tower, and spraying and washing the tail gas entering the tower by the washing liquid through a circulating pump;
s4, drying the solid wet material, wherein the temperature of the hot drying air is 110 ℃, and grading the dried material in a sieving machine;
s5, crushing the screened large particles by a crusher and returning the screened fine powder serving as a return material to a granulator; and screening out qualified particles, and directly cooling to obtain a large-particle ammonium sulfate product.
The granulating binder in the step S1 comprises the following components in parts by weight: 30 parts of urea-formaldehyde resin, 8 parts of sodium lignosulfonate, 17 parts of starch, 0.5 part of sodium carboxymethylcellulose and 22 parts of water.
Example 2
A large-particle ammonium sulfate product is shown in figure 1, and the production process comprises the following steps:
s1, adding sulfuric acid, ammonia and washing liquid from a gas-liquid separator into a tubular reactor for neutralization reaction, spraying slurry formed after reaction into a granulator, spraying granulation binder into a solid material bed through a spray nozzle, and spraying ammonia for granulation to form solid wet materials and granulation tail gas, wherein the granulation temperature is 90 ℃, and the water content of the solid wet materials at the outlet of the granulator is 4%;
s2, enabling the granulated tail gas to enter a gas-liquid separator and fully atomizing and mixing washing liquid from a circulating pump of the gas-liquid separator in a Venturi ejector, enabling a gas-liquid mixture to enter the gas-liquid separator for separation, enabling the washing liquid to be mixed with the granulated tail gas through the circulating pump to recycle ammonia and dust, conveying the mixture to a tubular reactor through a conveying pump, pressurizing the separated gas through a fan, and then enabling the gas to enter a cyclone washing tower for further washing;
s3, feeding dry tail gas from a fan and gas from a gas-liquid separator into a cyclone washing tower, adding sulfuric acid and water, keeping the liquid level of the gas-liquid separator balanced to form washing liquid of the cyclone washing tower, and spraying and washing the tail gas entering the tower by the washing liquid through a circulating pump;
s4, drying the solid wet material, wherein the temperature of the hot drying air is 125 ℃, and grading the dried material in a sieving machine;
s5, crushing the screened large particles by a crusher and returning the screened fine powder serving as a return material to a granulator; and screening out qualified particles, and directly cooling to obtain a large-particle ammonium sulfate product.
The granulating binder in the step S1 comprises the following components in parts by weight: 40 parts of urea-formaldehyde resin, 8 parts of sodium lignosulfonate, 15 parts of starch, 0.5 part of sodium carboxymethylcellulose and 28 parts of water.
Example 3
A large-particle ammonium sulfate product is shown in figure 1, and the production process comprises the following steps:
s1, adding sulfuric acid, ammonia and washing liquid from a gas-liquid separator into a tubular reactor for neutralization reaction, spraying slurry formed after reaction into a granulator, spraying granulation binder into a solid material bed through a spray nozzle, and spraying ammonia for granulation to form solid wet materials and granulation tail gas, wherein the granulation temperature is 110 ℃, and the water content of the solid wet materials at the outlet of the granulator is 5%;
s2, enabling the granulated tail gas to enter a gas-liquid separator and fully atomizing and mixing washing liquid from a circulating pump of the gas-liquid separator in a Venturi ejector, enabling a gas-liquid mixture to enter the gas-liquid separator for separation, enabling the washing liquid to be mixed with the granulated tail gas through the circulating pump to recycle ammonia and dust, conveying the mixture to a tubular reactor through a conveying pump, pressurizing the separated gas through a fan, and then enabling the gas to enter a cyclone washing tower for further washing;
s3, feeding dry tail gas from a fan and gas from a gas-liquid separator into a cyclone washing tower, adding sulfuric acid and water, keeping the liquid level of the gas-liquid separator balanced to form washing liquid of the cyclone washing tower, and spraying and washing the tail gas entering the tower by the washing liquid through a circulating pump;
s4, drying the solid wet material, wherein the temperature of the hot drying air is 175 ℃, and grading the dried material in a sieving machine;
s5, crushing the screened large particles by a crusher and returning the screened fine powder serving as a return material to a granulator; and screening out qualified particles, and directly cooling to obtain a large-particle ammonium sulfate product.
The granulating binder in the step S1 comprises the following components in parts by weight: 50 parts of urea-formaldehyde resin, 10 parts of sodium lignosulfonate, 19 parts of starch, 0.7 part of sodium carboxymethyl cellulose and 30 parts of water.
By integrating the embodiments 1-3, the invention can be obtained by using the tubular reactor process to provide ammonium sulfate as the main raw material, realizing the large granulation of the ammonium sulfate, fully utilizing the reaction heat of the tubular reactor, and having short reaction time, thereby properly reducing the production cost of the large-particle ammonium sulfate, having certain direct economic benefit, easy control of the process conditions, convenient operation and good product quality.
Example 4
Referring to fig. 2 and fig. 3, an embodiment of the present invention includes: a production process and equipment of large-particle ammonium sulfate products comprise a gas-liquid separation device 1, a fixed support frame 2, a screening device 3 and a feeding reaction device 4, wherein the fixed support frame 2 is fixedly connected to two sides of the gas-liquid separation device 1, the feeding reaction device 4 is fixedly connected to the upper end of the fixed support frame 2, the feeding reaction device 4 is positioned right above one end of the gas-liquid separation device 1, the screening device 3 is fixedly connected to the outer end of the fixed support frame 2, the screening device 3 is positioned at the bottom of the feeding reaction device 4, a liquid reagent can be accurately added into the tubular reactor 9 through the arrangement of a quantity control device 5, a solid material body can be added into the tubular reactor 9 through a feed hopper 10, the addition quantity of the material body in the process of producing the large-particle ammonium sulfate products is accurate and convenient, and the quality of the processed products is excellent;
referring to fig. 4 and 5, the feeding reaction device 4 includes a volume control device 5, an air pump 6, a connecting pipe 7, a fixed mounting plate 8, a tubular reactor 9 and a feeding hopper 10, the fixed mounting plate 8 is fixedly mounted in the middle of the tubular reactor 9, the connecting pipe 7 is fixedly connected to the outer side of the upper end of the tubular reactor 9, the feeding hopper 10 is fixedly connected to one end of the upper portion of the tubular reactor 9, the air pump 6 is fixedly mounted at the other end of the upper portion of the tubular reactor 9, the volume control device 5 is fixedly connected to the upper end of the tubular reactor 9, the gas and the liquid can be rapidly separated by arranging the gas-liquid separation device 1, and the separated liquid can conveniently flow back to the inside of the tubular reactor 9 again to be produced and processed;
referring to fig. 6, the quantity control device 5 includes a mounting plate 11, scale marks 12 and a measuring cylinder 13, the measuring cylinder 13 is uniformly and fixedly mounted on the upper end edge of the mounting plate 11, and the scale marks 12 are arranged on the outer wall of the measuring cylinder 13;
referring to fig. 7, 8 and 9, the gas-liquid separation device 1 includes a granulator 14, a blower 15, a storage frame 16, a first discharge pipe 17, a receiving bed 18, a nozzle 19, an ammonia spraying shaft 20, a sealing cover 21, a gas-liquid separator 22 and a second discharge pipe 23, the receiving bed 18 is fixedly connected to the upper end of the granulator 14, the sealing cover 21 is fixedly connected to the upper portion of the bottom end of the granulator 14, the nozzle 19 is uniformly and fixedly distributed inside two sides of the receiving bed 18, the ammonia spraying shaft 20 is fixedly installed inside the bottom end of the receiving bed 18, the gas-liquid separator 22 is fixedly installed inside the bottom end of the granulator 14, the sealing cover 21 is hermetically arranged outside the gas-liquid separator 22, the fan 15 is fixedly connected to one ends of the gas-liquid separator 22 and the sealing cover 21, the storage frame 16 is fixedly connected to the outer end of the fan 15, the first discharge pipe 17 is fixedly connected to the outer end of the storage frame 16, and the second discharge pipe 23 is fixedly connected to the middle of one end, away from the fan 15, of the gas-liquid separator 22;
referring to fig. 10, the sieving device 3 includes a material conveying pipe 24, a drying machine 25, an electric control valve 26, a connecting support frame 27 and a sieving machine 28, the sieving machine 28 is fixedly installed inside the connecting support frame 27, the material conveying pipe 24 is fixedly connected to the middle of the front end of the sieving machine 28 through the connecting support frame 27, the drying machine 25 and the electric control valve 26 are fixedly installed inside the material conveying pipe 24, the electric control valve 26 is located between the drying machine 25 and the sieving machine 28, the solid wet material formed in the neutralization reaction enters the material conveying pipe 24 and is dried by the drying machine 25, the dried material enters the sieving machine 28 to be classified under the control of the electric control valve 26, the dried tail gas enters the cyclone dust collector to recover most of the dust, the recovered dust returns to the granulator 14 as the return material, the separated gas enters the cyclone washing tower for further washing through pressurization by the blower, the large particles separated by the crushing device in the sieving machine 28 and the fine powder returned to the granulator 14 as the return material .
Referring to fig. 2 and 3, the bottom end of the tubular reactor 9 is located right above the receiving bed 18, so that the discharged material in the tubular reactor 9 can fall on the receiving bed 18, 0.5-1.5 parts by weight of granulation binder is sprayed through the spray nozzle 19, and 0.4-7.5 parts by weight of ammonia is sprayed through the ammonia spraying shaft 20 for granulation, so as to form solid wet material and granulation tail gas.
Referring to fig. 2 and 3, six measuring cylinders 13 are provided, and the bottom ends of the six measuring cylinders 13 are all communicated with the interior of the tubular reactor 9 through the mounting plate 11, so that liquid material can be accurately added and controlled through the measuring cylinders 13.
Referring to fig. 2 and 3, two ends of the fixed mounting plate 8 are fixedly connected to the upper end of the fixed support frame 2, the inner side of the bottom end of the fixed support frame 2 is fixedly connected to the outer side of the pelletizer 14, and the connecting support frame 27 is fixedly connected to the fixed support frame 2, so as to play a role of fixed support.
Referring to fig. 2 and 3, the second discharge pipe 23 is connected to the connection pipe 7 through a hose, so that the liquid can enter the tubular reactor 9 from the gas-liquid separator 22 through the hose.
Referring to fig. 2 and 3, the feed hopper 10 is disposed in an inclined shape, and the end of the feed hopper 10 inserted into the tubular reactor 9 is a lower end, so that the solid material can be easily added into the tubular reactor 9 through the feed hopper 10.
Referring to fig. 2 and 3, the feed pipe 24 is disposed in an inclined manner, the feed pipe 24 is inserted into a lower end of the screening machine 28, and the granulator 14 is connected to the screening machine 28 through a conveying pipe, so that the material in the tubular reactor 9 can be conveyed into the screening machine 28 through the inclined feed pipe 24.
This embodiment is when implementing, can be to the inside accurate liquid reagent that adds of tubular reactor 9 through setting up accuse volume device 5, can add the solid material to the inside of tubular reactor 9 through feeder hopper 10, it is accurate again convenient to make the in-process material body addition volume of large granule ammonium sulfate product production, also make the product quality of processing excellent, can make gas-liquid carry out quick separation through setting up gas-liquid separation device 1, and the liquid of separation can be convenient once more flow back to the inside of tubular reactor 9 and carry out going on of production and processing, can be with the granule size that makes the product of producing meet the requirements through setting up screening plant 3, make the large granule ammonium sulfate granule of producing even and meet the requirements.
Example 5
In example 4, as shown in fig. 11, the outer ends of the fixed support frames 2 are symmetrically and fixedly provided with the support plates 29, the front ends of the support plates 29 are internally and fixedly provided with the guide discharge plates 30, the guide discharge plates 30 are internally provided with the discharge grooves 31, the guide discharge plates 30 are obliquely arranged at 45 degrees, and the guide discharge plates 30 are positioned right below the sieving machine 28.
In the implementation of this embodiment, the large ammonium sulfate particles screened and discharged by the screening machine 28 and meeting the requirements can slowly slide down to a designated position for collection and use through the guidance of the guide discharge plate 30 and the discharge groove 31, so as to prevent the discharged large ammonium sulfate particles from entering and splashing.
The working principle is as follows: firstly, adding sulfuric acid, ammonia, liquid and solid into a tubular reactor 9 for neutralization reaction, spraying slurry formed after reaction from the bottom end of the tubular reactor 9 onto a material receiving bed 18 by starting an air pump 6, spraying a granulation binder into the solid material bed through a spray nozzle 19, spraying ammonia through an ammonia spraying shaft 20 for granulation to form solid wet materials and granulation tail gas, enabling the granulation tail gas to enter a gas-liquid separator 22 and washing liquid from a circulating pump of the gas-liquid separator 22 to be fully atomized and mixed in a Venturi ejector in the gas-liquid separator 22, enabling the gas-liquid mixture to enter the gas-liquid separator 22 for separation, enabling the washing liquid to be mixed with the granulation tail gas through the circulating pump to recover ammonia and dust, enabling the washing liquid to be conveyed to the tubular reactor through a conveying pump, enabling the separated gas to enter a storage frame 16, enabling the separated gas to be pressurized through a fan 15, then being discharged through a first discharge pipe 17 and enabling the gas to enter an external cyclone washing tower for further washing, dry tail gas from a fan and gas discharged by a gas-liquid separator 22 enter a cyclone washing tower, sulfuric acid is added, water is added according to the consumption of the washing liquid, the liquid level of the gas-liquid separator 22 is kept balanced to form washing liquid of the cyclone washing tower, the washing liquid sprays and washes the tail gas entering the tower through a circulating pump, the overflow amount is consistent with the total amount of the liquid added into the cyclone washing tower, the washing liquid overflows to the gas-liquid separator 22, the washed waste gas is emptied, solid wet materials formed in a neutralization reaction enter a material conveying pipe 24 to be dried through a dryer 25, the dried materials enter a screening machine 28 to be classified through the control of an electric control valve 26, the dried tail gas enters a cyclone dust collector to recover most of dust, the recovered dust returns to a granulator 14 as return material, and the separated gas enters the cyclone washing tower for further washing through the pressurization of the fan, the screened large particles are crushed by a crushing device in the screening machine 28 and the screened fine powder is returned to the granulator 14 as a return material, the screened qualified particles are returned to the granulator 14 to maintain the stable return material amount, and the rest qualified particles are cooled to obtain a product, the large ammonium sulfate particles which are screened and discharged from the screening machine 28 and meet the composite requirement can slowly slide to a specified position for collection and use through the guide of the guide discharge plate 30 and the discharge groove 31, so that the discharged large ammonium sulfate particles are prevented from splashing.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A production process of a large-particle ammonium sulfate product is characterized by comprising the following steps:
s1, adding sulfuric acid, ammonia and a washing liquid from a gas-liquid separator into a tubular reactor for neutralization reaction, spraying slurry formed after the reaction into a granulator, spraying a granulation binder into a solid material bed through a spray nozzle, and spraying ammonia for granulation to form a solid wet material and granulation tail gas, wherein the granulation temperature is 80-110 ℃, and the water content of the solid wet material at the outlet of the granulator is 3-5%;
s2, enabling the granulated tail gas to enter a gas-liquid separator and fully atomizing and mixing washing liquid from a circulating pump of the gas-liquid separator in a Venturi ejector, enabling a gas-liquid mixture to enter the gas-liquid separator for separation, enabling the washing liquid to be mixed with the granulated tail gas through the circulating pump to recycle ammonia and dust, conveying the mixture to a tubular reactor through a conveying pump, pressurizing the separated gas through a fan, and then enabling the gas to enter a cyclone washing tower for further washing;
s3, feeding dry tail gas from a fan and gas from a gas-liquid separator into a cyclone washing tower, adding sulfuric acid and water, keeping the liquid level of the gas-liquid separator balanced to form washing liquid of the cyclone washing tower, and spraying and washing the tail gas entering the tower by the washing liquid through a circulating pump;
s4, drying the solid wet material, wherein the temperature of the drying hot air is 110-175 ℃, and grading the dried material in a sieving machine;
s5, crushing the screened large particles by a crusher and returning the screened fine powder serving as a return material to a granulator; screening out qualified particles, and directly cooling to obtain a large-particle ammonium sulfate product;
the device used in the steps S1-S4 comprises a gas-liquid separation device (1), a fixed support frame (2), a screening device (3) and a charging reaction device (4), and is characterized in that: the device comprises a fixed support frame (2), a feeding reaction device (4), a screening device (3) and a gas-liquid separation device (1), wherein the fixed support frame (2) is fixedly connected to two sides of the gas-liquid separation device (1), the feeding reaction device (4) is fixedly connected to the upper end of the fixed support frame (2), the feeding reaction device (4) is positioned right above one end of the gas-liquid separation device (1), the screening device (3) is fixedly connected to the outer end of the fixed support frame (2), and the screening device (3) is positioned at the bottom of the feeding reaction device (4);
the feeding reaction device (4) comprises a quantity control device (5), an air pump (6), a connecting pipe (7), a fixed mounting disc (8), a tubular reactor (9) and a feed hopper (10), wherein the fixed mounting disc (8) is fixedly mounted in the middle of the tubular reactor (9), the connecting pipe (7) is fixedly connected to the outer side of the upper end of the tubular reactor (9), the feed hopper (10) is fixedly connected to one end of the upper part of the tubular reactor (9), the air pump (6) is fixedly mounted at the other end of the upper part of the tubular reactor (9), and the quantity control device (5) is fixedly connected to the upper end of the tubular reactor (9);
the quantity control device (5) comprises a mounting supporting plate (11), scale marks (12) and a measuring cylinder (13), the measuring cylinder (13) is uniformly and fixedly mounted on the edge of the upper end of the mounting supporting plate (11), and the scale marks (12) are arranged on the outer wall of the measuring cylinder (13);
the gas-liquid separation device (1) comprises a granulator (14), a fan (15), a storage frame (16), a first discharge pipe (17), a receiving bed (18), a spray head (19), an ammonia spraying shaft (20), a sealing cover (21), a gas-liquid separator (22) and a second discharge pipe (23), wherein the receiving bed (18) is fixedly connected to the upper end of the granulator (14), the sealing cover (21) is fixedly connected to the upper portion of the bottom end of the granulator (14), the spray head (19) is uniformly and fixedly distributed in the two sides of the receiving bed (18), the ammonia spraying shaft (20) is fixedly arranged in the bottom end of the receiving bed (18), the gas-liquid separator (22) is fixedly arranged in the bottom end of the granulator (14), the sealing cover (21) is hermetically arranged outside the gas-liquid separator (22), and the fan (15) is fixedly connected to one end of the gas-liquid separator (22) and the sealing cover (21), the storage frame (16) is fixedly connected to the outer end of the fan (15), the first discharge pipe (17) is fixedly connected to the outer end of the storage frame (16), and the second discharge pipe (23) is fixedly connected to the middle of one end, away from the fan (15), of the gas-liquid separator (22);
screening plant (3) are including conveying pipeline (24), desiccator (25), automatically controlled valve (26), joint support frame (27) and screening machine (28), screening machine (28) fixed mounting is in the inside of joint support frame (27), conveying pipeline (24) are through joint support frame (27) fixed connection at the front end middle part of screening machine (28), desiccator (25) and automatically controlled valve (26) fixed mounting are in the inside of conveying pipeline (24), just automatically controlled valve (26) are located between desiccator (25) and screening machine (28).
2. The process of claim 1, wherein the production process of the large-particle ammonium sulfate product comprises the following steps: the bottom end of the tubular reactor (9) is positioned right above the receiving bed (18).
3. The process of claim 2, wherein the production process of the large-particle ammonium sulfate product is as follows: the measuring cylinder (13) is provided with six measuring cylinders, and the bottom ends of the measuring cylinders (13) are communicated with the interior of the tubular reactor (9) through the mounting support plate (11).
4. The process of claim 3, wherein the production process of the large-particle ammonium sulfate product comprises the following steps: the granulator fixing device is characterized in that two ends of the fixing mounting disc (8) are fixedly connected with the upper end of the fixing support frame (2), the inner side of the bottom end of the fixing support frame (2) is fixedly connected with the outer side of the granulator (14), and the connecting support frame (27) is fixedly connected with the fixing support frame (2).
5. The process of claim 4, wherein the production process of the large-particle ammonium sulfate product comprises the following steps: the second discharge pipe (23) is connected with the connecting pipe (7) through a hose.
6. The process of claim 5, wherein the production process of the large-particle ammonium sulfate product comprises the following steps: the feed hopper (10) is arranged in an inclined manner, and one end of the feed hopper (10) inserted into the tubular reactor (9) is lower.
7. The process of claim 6, wherein the production process of the large-particle ammonium sulfate product comprises the following steps: the conveying pipeline (24) is arranged in an inclined mode, one end, inserted into the screening machine (28), of the conveying pipeline (24) is the lower end, and the granulating machine (14) is connected with the screening machine (28) through the conveying pipe.
8. The process of claim 7, wherein the production process of the large-particle ammonium sulfate product comprises the following steps: the utility model discloses a screening machine, including fixed bolster (2), fixed bolster (30), discharge groove (31) have been seted up to the inside fixed mounting of front end of backup pad (29), the outer end symmetry fixed mounting of fixed bolster (2) has backup pad (29), the inside fixed mounting of front end of backup pad (29) has direction discharge plate (30), just discharge plate (30) are 45 slopes to set up, direction discharge plate (30) are located screening machine (28) under.
9. The process of claim 1, wherein the production process of the large-particle ammonium sulfate product comprises the following steps: the granulation binder in the step S1 comprises the following components in parts by weight: 30-50 parts of urea-formaldehyde resin, 6-10 parts of sodium lignosulfonate, 15-25 parts of starch, 0.4-0.8 part of sodium carboxymethylcellulose and 20-40 parts of water.
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| CN101850989B (en) * | 2009-04-02 | 2013-01-16 | 河北天人化工股份有限公司 | Preparation method of large-particle ammonium sulfate |
| CN101648713B (en) * | 2009-07-23 | 2011-09-07 | 瓮福（集团）有限责任公司 | Method for producing granular ammonium sulfate |
| US8974763B1 (en) * | 2013-12-18 | 2015-03-10 | Rentech, Inc. | System and method for production of granular ammonium sulfate |
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