CN202284892U

CN202284892U - Drying and molding system of recycled fine powder and particles

Info

Publication number: CN202284892U
Application number: CN2011203731759U
Authority: CN
Inventors: 王志勇
Original assignee: NANJING JIAHE DAILY CHEMICAL CO Ltd
Current assignee: NANJING JIAHE DAILY CHEMICAL CO Ltd
Priority date: 2011-09-30
Filing date: 2011-09-30
Publication date: 2012-06-27
Anticipated expiration: 2021-09-30

Abstract

The utility model discloses a drying and molding system of recycled fine powder and particles, which belongs to the producing and manufacturing field of washing powder, and comprises a powder spraying drying tower, and a belt conveying machine disposed at the bottom of the spraying drying tower. A descending air pipe is disposed at a powder-falling mouth of a cyclone dust collector. An air pipe is communicated with a fine powder recycling pipe, and a powder-falling mouth of the fine powder recycling pipe is disposed above the belt conveying machine. The drying and molding system of recycled fine powder and particles is advantageous in that problems like water content of products is high, granularity is poor and powder flow is bad which are caused by poor capability of heat exchange in the drying tower due to the application of a reverse blower and a Venturi tube to blow in cold air are resolved; problems like product quality is not stable and production operation is difficult to control which are caused by tower-returning process of original fine powder in the producing of washing powder can be resolved; energy is saved, emission is reduced, energy consumption is decreased, quality is stabilized and benefit is increased.

Description

A kind of recovery fine particle drying and moulding system

Technical field

The utility model relates to washing powder and manufactures the field, relates in particular to a kind of particle drying formation system.

Background technology

China present most of daily use chemicals enterprise is following in the technology that washing powder is granulated, fine powder returns tower: the washing powder slip is through high-pressure pump ejection slip particle; In tower in the slip particle dropping process; The drying tower middle part has high-temperature hot-air to get in the drying tower that dusts through body of the tower; The running orbit of hot blast in drying tower is for from bottom to top to the cat head air outlet; Make the moulding of slip particle drying through convection heat transfer' heat-transfer by convection, finally make slip form the qualified washing powder original washing powder of hollow bead shape, hot blast comes out after discharge to exhaust fan after the sedimentation of 2 cyclone dust removal separators from the cat head air outlet.The fine powder that the tail gas that the drying tower that dusts ejects is taken out of carries out the fine powder sedimentation through sack cleaner (or cyclone dust removal separator), and the washing powder fine powder that settles down blows into through back blowing machine and Venturi tube and reclaims fine powder (as shown in Figure 1) in the drying tower that dusts.Because what back blowing machine, Venturi tube were blown into is cold wind, and hot blast in the drying tower that dusts and the formed laminar condition of slip particle are disturbed, and makes its layer fluid that change take place; Formed turbulent phenomenon, added constantly being blown into of cold wind, made temperature decline in the tower; Cause heat-exchange capacity deficiency in the tower, have influence on product quality on the one hand, cause the product moisture content to raise; The hollow bead percentage of damage is high, and powder fluidity is poor; It is serious to cause airduct, precipitation apparatus easy blocking material and inner wall of tower to hang powder on the other hand, needs often to stop production the mediation clearing of pipeline and sweep tower work.Along with the raising of scope of the enterprise, product yield also improves thereupon, and the also corresponding increase of the air quantity of back blowing machine and power (perhaps need increase the quantity of back blowing machine and Venturi tube) is more serious to the influence of the drying in the spray tower.

For the not enough problem of heat-exchange capacity in the tower; If adopting, operating personnel open big exhaust fan; Change up coal furnace fire grate raising furnace temperature and strengthen the hot blast rate in the tower, though can improve the heat exchange temperature in the tower, if misoperation can make washing powder burn variable color; Influence the product whiteness index, in addition also consumes energy; If through reducing back blowing machine power, reduce the back blowing machine intake, the fine powder sedimentation then can't in time be discharged, and accumulated powder stops up in causing managing, and brings a difficult problem to operating personnel.

The utility model content

Goal of the invention: in order to overcome the deficiency that exists in the prior art, the utility model provides a kind of recovery fine particle drying and moulding system, is used to make the heat exchange of dusting in the drying tower more stable, and control product moisture content improves the Forming Quality of product.

Technical scheme: for realizing above-mentioned purpose; A kind of recovery fine particle drying and moulding system of the utility model; Belt conveyer at the bottom of comprising the drying tower that dusts, connect the cyclone dust collectors of the drying tower cat head that dusts and being located at the dry Tata that dusts; Be provided with descending airduct at the cyclone dust collectors powder mouth that falls, said airduct is communicated to a fine powder recovery tube, and the said fine powder recovery tube powder mouth that falls is located at the belt conveyer top.

The utility model adopts airduct to substitute back blowing machine, Venturi tube is carried out fine powder sedimentation and collection; The quantity of the corresponding said cyclone dust collectors of the quantity of said airduct; Be the airduct of powder mouth connection that falls below each cyclone dust collectors, said airduct focuses on a fine powder recovery tube and collects.Said fine powder recovery tube vertically is provided with, and powder is fallen naturally.

As the further optimization of the utility model, said fine powder recovery tube adopts cloth bag to be flexible coupling the cleaning when being convenient to the washing powder grade change; Said fine powder recovery tube also is provided with peep hole, is convenient to observe fine powder blanking or stopping state, is convenient in time remove buildup and guarantees that blanking is unblocked.

Beneficial effect: problems such as it is relatively poor that a kind of recovery fine particle drying and moulding system of the utility model has solved that use back blowing machine and Venturi tube enter that cold wind makes in the drying tower that the heat-exchange capacity deficiency causes that the product moisture content is high, granularity difference and powder flow; The former fine powder that has solved during washing powder is manufactured returns a unstable product quality that tower process causes and the unmanageable difficult problem of production operation, reaches the purpose that energy-saving and emission-reduction increase benefit energy consumption, stabilised quality simultaneously.The utility model directly falls into the fine powder of collecting at the bottom of the tower and gets into back batching production system on the belt conveyor, gets around the drying tower equipment that dusts, and has avoided the interference to the drying tower layer fluid of dusting in process of production.The utility model comes into operation simultaneously; Not only saved the expense of equipment such as back blowing machine, Venturi tube and energy consumption; And the exhaust fan (capital equipment) of 24 hours running 200KW power descended by original 50Hz and be stabilized in 30～32Hz scope; Practiced thrift the consumption of electric energy widely, reached energy-saving and emission-reduction and fallen the purpose that energy consumption, stabilised quality increase benefit.

Description of drawings

Fig. 1 is that existing granulation, fine powder go back to the system that tower adopts;

Fig. 2 is the structural representation of the utility model.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is done explanation further.

As shown in Figure 1, a kind of recovery fine particle drying and moulding system of the utility model comprises the drying tower 1 that dusts, cyclone dust collectors 2, belt conveyor 3, airduct 4, fine powder recovery tube 5.Drying tower 1 cat head that dusts is connected to cyclone dust collectors 2 through pipeline, and this system adopts the setting of two stage cyclone deduster, and the exhaust outlet of first cyclone dust collectors further separates fine powder at the air inlet that gets into second cyclone dust collectors.The powder mouth that falls of two cyclone dust collectors 2 lower ends connects two airducts 4 respectively; Airduct 4 converges to a fine powder recovery tube 5 of vertically placing again; The outlet of fine powder recovery tube 5 lower ends is positioned at the top of belt conveyor 3; Fine powder then falls at the bottom of the tower in the belt conveyor 3 through fine powder recovery tube 5, gets into the back burden process.

The washing powder slip from nozzle 7 ejection slip particles, spills in drying tower down under high-pressure pump drives from top to bottom, and drying tower 1 middle part of dusting also has a plurality of air inlets 6 of 400 ℃ of hot blasts through being uniformly distributed with around the body of the tower, and hot blast from bottom to top is provided.The discharging opening of the particle of moulding below the drying tower 1 that dusts is transported to subsequent processing above belt conveyor 3, successively through 2 cyclone dust collectors, after the fine powder sedimentation, discharge from the upper end by tail gas through the drying tower 1 cat head air outlet that dusts for hot blast.

This system gets around the drying tower equipment that dusts, and has avoided the interference to the drying tower internal layer fluid that dusts in process of production, makes the drying tower that dusts keep stable degree of drying and the required stable laminar condition of heat exchange.

The above only is the preferred implementation of the utility model; Be noted that for those skilled in the art; Under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection domain of the utility model.

Claims

1. one kind is reclaimed fine particle drying and moulding system; Belt conveyer (3) at the bottom of comprising the drying tower that dusts (1), connect the cyclone dust collectors (2) of drying tower (1) cat head that dusts and being located at the drying tower that dusts (1) tower; It is characterized in that: this system is provided with descending airduct (4) at cyclone dust collectors (2) the powder mouth that falls; Said airduct (4) is communicated to a fine powder recovery tube (5), and said fine powder recovery tube (5) the powder mouth that falls is located at belt conveyer (3) top.

2. a kind of recovery fine particle drying and moulding according to claim 1 system is characterized in that: the quantity of the corresponding said cyclone dust collectors of the quantity of said airduct (4) (2).