CN110873515A - Ammonium salt drying system - Google Patents

Ammonium salt drying system Download PDF

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Publication number
CN110873515A
CN110873515A CN201811010381.6A CN201811010381A CN110873515A CN 110873515 A CN110873515 A CN 110873515A CN 201811010381 A CN201811010381 A CN 201811010381A CN 110873515 A CN110873515 A CN 110873515A
Authority
CN
China
Prior art keywords
ammonium
ammonium salt
drying system
furnace
wet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811010381.6A
Other languages
Chinese (zh)
Inventor
甘世杰
高卫星
邓占听
王伟
王红敏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HENAN JUNHUA DEVELOPMENT Co Ltd
Original Assignee
HENAN JUNHUA DEVELOPMENT Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HENAN JUNHUA DEVELOPMENT Co Ltd filed Critical HENAN JUNHUA DEVELOPMENT Co Ltd
Priority to CN201811010381.6A priority Critical patent/CN110873515A/en
Publication of CN110873515A publication Critical patent/CN110873515A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B1/00—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids
    • F26B1/005—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids by means of disintegrating, e.g. crushing, shredding, milling the materials to be dried
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/005—Treatment of dryer exhaust gases
    • F26B25/007—Dust filtering; Exhaust dust filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The invention relates to the technical field of combined alkali production equipment, in particular to an ammonium salt drying system which comprises an anti-caking agent adding pipe, an instrument gas pressure charging pipe, a wet ammonium blanking device, a crusher, a feeder, a dry ammonium furnace and a dust collecting device, wherein the anti-caking agent adding pipe and the instrument gas pressure charging pipe are respectively connected with the wet ammonium blanking device, the crusher is connected with the wet ammonium blanking device, the crusher and the dry ammonium furnace are respectively connected with the feeder, and the dust collecting device is connected with the dry ammonium furnace. The invention is based on the innovative design of the existing combined alkali production equipment, can effectively solve the problems of short operation period and frequent scabbing of the fluidized bed caused by uneven distribution of wet ammonium entering the fluidized bed, realizes high-efficiency drying of ammonium salt, and avoids the problems of caking, bed sitting, dead bed and the like caused by the accumulation of the ammonium salt on the fluidized bed, thereby greatly prolonging the operation period of the ammonium drying furnace, reducing the operation difficulty, further greatly reducing the economic cost, increasing the economic benefit and being suitable for industrial popularization and application.

Description

Ammonium salt drying system
Technical Field
The invention relates to the technical field of combined alkali production equipment, in particular to an ammonium salt drying system.
Background
The combined soda ash production method, called combined soda ash method for short, is the main method for producing soda ash. In the combined alkali production, ammonium salt is used as a main raw material, and a fluidized bed furnace is mainly used for drying the ammonium salt. However, wet ammonium is easy to be pseudocoagulated in the transportation process, and after entering the fluidized bed, the wet ammonium can be coagulated and pilling, so that the fluidized bed is pressed to be dead, and the operation time of the fluidized bed is influenced. In the industry, most of the ammonium salts are added with the anti-caking agent, and the anti-caking agent is not well distributed after being added, so that the added wet ammonium of the anti-caking agent has high viscosity and is easy to ball; the small amount of wet ammonium added to the anti-caking agent had caked and had poor distribution. Normal wet ammonium particle size is around 4mm, while particle size of 2-3mm is generally required in production.
Therefore, it is urgently needed to develop a device for ensuring the stable operation of the dry ammonium furnace to solve the problem of the distribution of wet ammonium in the fluidized bed.
Disclosure of Invention
The invention aims to provide an ammonium salt drying system aiming at the problems in the prior art, the ammonium salt drying system is designed based on the existing combined alkali production process equipment, the efficient drying of ammonium salt is realized, and the problems of caking, bed sitting, dead bed and the like caused by the fact that ammonium salt is piled on a flowing bed are avoided, so that the operation period of an ammonium drying furnace is greatly prolonged, the operation difficulty is reduced, and the economic cost is reduced.
The technical scheme for solving the problems is as follows: ammonium salt drying system adds pipe, instrument gas booster pipe, wet ammonium unloader, breaker, feeder, dry ammonium stove and dust arrester installation including anti-caking agent, anti-caking agent add the pipe with instrument gas booster pipe respectively with wet ammonium unloader is connected, the breaker with dry ammonium stove respectively with the feeder is connected, dust arrester installation with dry ammonium stove is connected.
Further, in the ammonium salt drying system of the present invention, the wet ammonium blanking device is a centrifuge.
Further, in the ammonium salt drying system of the present invention, the crusher is provided with a motor, a main shaft and a plurality of blades, the main shaft is driven by the motor, and the blades are arranged around the main shaft.
Further, in the ammonium salt drying system of the invention, the feeder is a device which feeds materials by adopting a throwing mode.
Further, in the ammonium salt drying system of the invention, the ammonium drying furnace comprises a furnace body, and a feeding hole and a discharging hole which are arranged on the furnace body, and the furnace body is oval.
Further, in the ammonium salt drying system, a stirrer is arranged at the feed inlet of the ammonium drying furnace.
Further, in the ammonium salt drying system of the invention, a bed height adjusting valve is arranged at the discharge port of the ammonium drying furnace.
Further, in the ammonium salt drying system of the present invention, the crusher is used for crushing and stirring the wet ammonium material.
Further, in the ammonium salt drying system of the present invention, the dust collecting device includes a plurality of sets of cyclone dust collectors and a dust collecting device connected to each other, and each set of the cyclone dust collectors is connected to the ammonium drying furnace.
Further, in the ammonium salt drying system, the anti-caking agent adding pipe and the instrument gas pressure pipe are opened and closed simultaneously, and the anti-caking agent adding pipe adds the anti-caking agent in an instrument gas distribution mode.
Compared with the prior art, the invention has the beneficial effects that: make full use of has the existing alkali production equipment of antithetical couplet to carry out the innovative design, effectively solve wet ammonium and get into the problem that the cloth inequality caused the fluidized bed operation cycle to be short and often scab after the fluidized bed, realize the high-efficient drying of ammonium salt, avoid the ammonium salt to pile and cause caking, sit bed and dead bed scheduling problem to take place on the fluidized bed to the operation cycle of extension dry ammonium stove by a wide margin reduces the operation degree of difficulty, and then reduces economic cost by a wide margin, increases economic benefits, is fit for the industrialization and popularizes and applies.
Drawings
FIG. 1 is a schematic diagram of the ammonium salt drying system of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the drawings and examples, but the present invention is not limited to the examples.
As shown in fig. 1, the ammonium salt drying system of the present invention includes an anti-caking agent adding pipe, an instrument gas pressure pipe, a wet ammonium blanking device, a crusher, a feeder, a dry ammonium furnace and a dust collecting device, wherein the anti-caking agent adding pipe and the instrument gas pressure pipe are respectively connected to the wet ammonium blanking device, the crusher is connected to the wet ammonium blanking device, the crusher and the dry ammonium furnace are respectively connected to the feeder, and the dust collecting device is connected to the dry ammonium furnace.
In the above embodiments, to reduce the water content in the wet ammonium blanking, the wet ammonium blanking device is preferably a centrifuge. In order to mix the anti-caking agent and the wet ammonium sufficiently in time, the anti-caking agent adding pipe and the instrument gas pressure pipe are preferably opened and closed simultaneously, and the anti-caking agent adding pipe adds the anti-caking agent in an instrument gas distribution mode. In order to ensure that the granularity of raw materials meets the requirement of the production of the combined alkali and promote the uniform progress of related reactions, thereby providing guarantee for the product quality, the wet ammonium added with the anti-caking agent is further crushed and stirred by the crusher, namely the crusher is used for crushing and stirring the wet ammonium material, the crusher is preferably provided with a motor, a main shaft and blades, the main shaft is driven by the motor, the blades are arranged around the main shaft, when the crusher operates, the main shaft is driven by the motor so as to drive the blades to rotate at high speed, when the wet ammonium material enters the crusher, the wet ammonium is tightly rubbed and strongly impacted on the blades in a rotating airflow, the wet ammonium is fully crushed and stirred, thereby the granularity of the wet ammonium is effectively changed, the granularity of the wet ammonium material crushed by the crusher can be 1-4 mm, and by adjusting the rotating speed of the motor, the particle size of the wet ammonium material crushed by the crusher can reach 1 mm-3 mm. In order to effectively avoid the occurrence of agglomeration on the fluidized bed and the occurrence of bed setting and the like caused by agglomeration, the feeder is preferably a device adopting a throwing mode for feeding. The dry ammonium furnace comprises a furnace body, and a feeding hole and a discharging hole which are arranged on the furnace body, wherein the furnace body is preferably elliptical so as to reduce heat loss and improve heat efficiency, thereby improving the dry ammonium efficiency; preferably, a stirrer is arranged at a feed inlet of the dry ammonium furnace, and is used for stirring wet ammonium materials entering the fluidized bed, so that further guarantee is provided for avoiding agglomeration, and preventing bed sitting and bed death; preferably, a bed height adjusting valve is arranged at the discharge port of the dry ammonium furnace, so that the bed layer keeps a better height, and the operation efficiency is improved. In order to enhance the environmental protection effect and effectively treat dust generated in the ammonium drying process, preferably, the dust collecting device comprises a plurality of groups of cyclone dust collectors and a dust collecting device which are connected, and each group of cyclone dust collectors are respectively connected with the ammonium drying furnace.
The ammonium salt drying system can provide a better ammonium salt raw material for the combined alkali production, specifically, when the wet ammonium blanking device carries out wet ammonium blanking, the anti-caking agent is added through the anti-caking agent adding pipe, and when the anti-caking agent is added, the instrument air pressure pipe is used for carrying out air pressure boost, so that the anti-caking agent is uniformly sprayed on the surface of wet ammonium in an atomization mode, and partial caking of the wet ammonium caused by nonuniform addition of the anti-caking agent is prevented; breaking wet ammonium which is pseudo-caked in the wet ammonium blanking device by the crusher to increase the contact area, and simultaneously uniformly stirring the wet ammonium added with the anti-caking agent, thereby ensuring that the granularity of the wet ammonium is between 1 and 3mm when the wet ammonium enters the fluidized bed; the crushed wet ammonium enters the dry ammonium furnace through the feeder in a throwing mode, and the throwing mode can effectively ensure the uniform distribution effect of the wet ammonium entering the fluidized bed after entering the furnace, thereby increasing the operation period of the fluidized bed and effectively avoiding the dead bed of the fluidized bed caused by uneven feeding of the wet ammonium; wet ammonium after entering the furnace is dried in a fluidized bed ammonium drying furnace, and dust generated in the drying process is treated by a dust collecting device, so that the environmental protection is guaranteed. In the specific application of the invention, the moisture content of the wet ammonium, the addition amount of the anti-caking agent, the proportion of the anti-caking agent to the dilution water and the like are determined according to specific working conditions, preferably, the addition amount of the anti-caking agent is 0.2-0.4 kg per ton of ammonium, and the proportion of the anti-caking agent to the dilution water is 1: 3-1: 6, the water content of wet ammonium is 5-8%.
Generally, the moisture contained in wet ammonium is mainly the moisture on the surface of wet ammonium particles and the capillary water existing between the particles, and the moisture is non-binding water, so that in the drying process of the non-binding water on the surface of the wet ammonium material, the vapor pressure of the surface of the wet ammonium is equal to the vapor pressure of water at the same temperature, the drying speed is controlled by the surface vaporization speed of the water, the particle size of the wet ammonium is changed, the surface area of the wet ammonium is increased, the moisture evaporation is facilitated, and the production capacity of a dry ammonium furnace is increased. The invention changes the particle size of wet ammonium and adjusts the feeding mode of the wet ammonium, and enhances the air distribution effect of the fluidized bed of the dry ammonium furnace, thereby effectively solving the problems of caking, bed sitting, bed dead and the like caused by uneven distribution of the wet ammonium belt block in the dry ammonium furnace and difficult dispersion after entering the dry ammonium furnace, and further solving the problems of short operation period and high operation strength of the dry ammonium furnace, ensuring the stable operation of the dry ammonium furnace and greatly reducing the economic cost; meanwhile, a better ammonium salt raw material is provided for the combined alkali production, the quality of the product produced by the combined alkali is guaranteed, the economic benefit is increased, and the method is suitable for industrial popularization and application.
The present invention is not limited to the above-described embodiments, and any obvious modifications or alterations to the above-described embodiments may be made by those skilled in the art without departing from the spirit of the present invention and the scope of the appended claims.

Claims (10)

1. Ammonium salt drying system adds pipe, instrument gas booster pipe, wet ammonium unloader, breaker, feeder, dry ammonium stove and dust arrester installation including anti-caking agent, anti-caking agent add the pipe with instrument gas booster pipe respectively with wet ammonium unloader is connected, the breaker with dry ammonium stove respectively with the feeder is connected, dust arrester installation with dry ammonium stove is connected.
2. Ammonium salt drying system according to claim 1, characterized in that: the wet ammonium blanking device is a centrifugal machine.
3. Ammonium salt drying system according to claim 1, characterized in that: the crusher is provided with a motor, a main shaft and blades, the main shaft is driven by the motor, the blades are provided with a plurality of groups, and the blades are arranged around the main shaft.
4. Ammonium salt drying system according to claim 1, characterized in that: the feeder is a device adopting a throwing mode for feeding.
5. Ammonium salt drying system according to claim 1, characterized in that: the dry ammonium furnace comprises a furnace body, a feeding hole and a discharging hole, wherein the feeding hole and the discharging hole are formed in the furnace body, and the furnace body is oval.
6. Ammonium salt drying system according to claim 5, characterized in that: and a stirrer is arranged at the feed inlet of the dry ammonium furnace.
7. Ammonium salt drying system according to claim 5, characterized in that: and a bed height adjusting valve is arranged at the discharge outlet of the dry ammonium furnace.
8. Ammonium salt drying system according to claim 1, characterized in that: the crusher is used for crushing and stirring wet ammonium materials.
9. Ammonium salt drying system according to claim 1, characterized in that: the dust collecting device comprises a plurality of groups of cyclone dust collectors and a dust collecting device which are connected, and each group of cyclone dust collectors are respectively connected with the dry ammonium furnace.
10. Ammonium salt drying system according to any one of claims 1 to 9, characterized in that: the anti-caking agent adding pipe and the instrument gas pressure charging pipe are opened and closed simultaneously, and the anti-caking agent adding pipe adds the anti-caking agent in an instrument gas distribution mode.
CN201811010381.6A 2018-08-31 2018-08-31 Ammonium salt drying system Pending CN110873515A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811010381.6A CN110873515A (en) 2018-08-31 2018-08-31 Ammonium salt drying system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811010381.6A CN110873515A (en) 2018-08-31 2018-08-31 Ammonium salt drying system

Publications (1)

Publication Number Publication Date
CN110873515A true CN110873515A (en) 2020-03-10

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ID=69715587

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811010381.6A Pending CN110873515A (en) 2018-08-31 2018-08-31 Ammonium salt drying system

Country Status (1)

Country Link
CN (1) CN110873515A (en)

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Application publication date: 20200310