CN2716777Y

CN2716777Y - A fluidized-bed drier with built-in heat exchanger

Info

Publication number: CN2716777Y
Application number: CN 200420052840
Authority: CN
Inventors: 马训强; 彭丽华; 蒋斌; 苗帅; 史勇春
Original assignee: Shandong Tianli Drying Equipment Co Ltd
Current assignee: Shandong Tianli Drying Co., Ltd.
Priority date: 2004-08-09
Filing date: 2004-08-09
Publication date: 2005-08-10
Anticipated expiration: 2014-08-09

Abstract

The utility model relates to a fluidized-bed drier with built-in heat exchangers, belonging to the technical field of a drier. The utility model is composed of an upper box body, a lower box body and a fluidization section, wherein, the upper box body comprises a feed inlet and an air outlet; the lower box body comprises a blower, an air intake and a discharge port; the fluidization section is connected between the upper box body and the lower box body, and built-in heat exchangers are arranged on the fluidization section. The built-in heat exchangers are divided into many groups which are arranged by the horizontal tube bundle form and are arranged in order and adequately distributed on the fluidization section in accordance with a 'U'-shaped metallic conduit. Each built-in heat exchanger is composed of a built-in heat exchanger package, a built-in heat exchanger steam inlet, a built-in heat exchanger condensate outlet and a steam coil. The steam inlet and the condensate outlet of the built-in heat exchanger are both connected with the built-in heat exchanger package. The steam coils are vertically arranged on the fluidization section in the shape of 'U'. The utility model has advantages that utility model can cut down power consumption and energy consumption; the utility model has good drying effect, high heat exchange efficiency, small ground occupying, ideal environmental protection, etc.

Description

A kind of fluid bed dryer with built-in heat exchanger

One, technical field

The utility model relates to a kind of fluidized bed drying equipment that is used for, and belongs to the drying machine technical field.

Two, background technology

Fluid bed dryer is a big class of traditional drying equipment, is widely used in industries such as chemical industry, oil, feed, is applicable to material and thermosensitive type materials such as dry various graininess, sheet.There is following defective in traditional fluid bed drying plant: the thermal source of (1) fluid bed oven dry generally be with the steam indirect heat exchange after hot-air, the consumption of vapours is bigger, the system operation cost height; (2) floor space is bigger, and the output investment ratio of primary equipment is bigger; (3) because the power of fluid bed is higher, material is wherein carried secretly with the elutriation loss bigger, and the dust that system produced is just many like this, makes the load weightening finish of back dust pelletizing system, and environmental protection pressure is bigger.

Three, summary of the invention

The utility model is at the deficiencies in the prior art, provides that a kind of drying effect is good, heat exchange efficiency is high, floor space is little, the fluid bed dryer of the band built-in heat exchanger of system's small investment, energy-saving and environmental protection.

The utility model is achieved through the following technical solutions:

The utility model mainly is made up of upper box, lower box and fluidisation section, and wherein, upper box comprises charging aperture and air outlet, and lower box comprises blower fan, air inlet and discharging opening, and the fluidisation section is connected between the upper and lower casing, and built-in heat exchanger is arranged on the fluidisation section.

Built-in heat exchanger is divided into some groups, is arranged to the horizontal tube bundle form, arranges in order according to " U " shape metallic conduit to be evenly distributed on the fluidisation section.

Each built-in heat exchanger is made up of drum, built-in heat exchanger steam inlet, built-in heat exchanger condensation-water drain and steam pipe coil, the steam inlet of built-in heat exchanger all links to each other with the built-in heat exchanger drum with condensation-water drain, steam pipe coil according to " U " shape vertical array on the fluidisation section.

The steam thermal energy of built-in heat exchanger is connected with external boiler by built-in heat exchanger steam inlet, built-in heat exchanger condensation-water drain and produces.Lower box is connected with electric blower, and electric blower is carried out and is electrically connected.

Drum and interior heating tube can adopt high temperature resistant and anti-corrosion material according to the situation of material, the conventional stainless steel that adopts, the service life of assurance equipment.

The utility model has been set up some groups of built-in heat exchangers on the architecture basics of traditional fluid bed dryer; Adopt " U " shape horizontal type level tube bank form on the coil pipe of built-in heat exchanger, this layout is less to the fluidisation quality influence, and can obtain bigger heat exchange area.According to the size of heat exchange requirement and bed body, some groups of built-in heat exchangers are distributed on the fluidisation section of traditional fluid bed, and material is contacted fully with heat exchanger, have strengthened heat exchange efficiency.The steam inlet of every group of built-in heat exchanger all links to each other with drum with condensation-water drain, has guaranteed that steam evenly enters built-in heat exchanger, and the later condensed water of heat exchange is evenly discharged heat exchanger, and bias current does not take place.Built-in heat exchanger has played main thermal source effect in the drying and dehydrating process of material, and require the conventional fluid bed that compares much smaller as the power of fluidisation, so the required air quantity of the fluid bed of this band built-in heat exchanger is less relatively, the dust of taking out of is also few, so the conventional fluid bed of the pressure ratio of environmental protection is much smaller.

The utility model has following advantage with respect to traditional fluid bed dryer: because most of heat is to be provided by built-in heat exchanger, and tradition mainly is as the power medium that guarantee normal fluidization as the hot-air of thermal source, reduce greatly than the required quantity of hot air of conventional fluid bed dryer, therefore system's power consumption and the also corresponding minimizing of waste-heat rejection, the drying efficiency height; Floor space is little, and system's investment reduces; Internal heating fluidized bed system's operating gas velocity is lower than conventional fluid bed, and the material that can reduce effectively in the fluid bed is carried secretly and the elutriation loss, and the corresponding load that reduces dust pelletizing system has alleviated environmental protection pressure.

(4) description of drawings

Fig. 1 is the utility model dimension sketch;

Fig. 2 is the left view of Fig. 1, with the local diagrammatic sketch of internal heater coil pipe;

Fig. 3 is the vertical view of Fig. 1;

Fig. 4 is the local diagrammatic sketch of the utility model built-in heat exchanger;

Fig. 5 is the vertical view of Fig. 4.

Wherein, 1. charging aperture, 2. air outlet, 3. upper box, 4. built-in heat exchanger, 5. fluidisation section, 6. air inlet, 7. lower box, 8. built-in heat exchanger drum, 9. built-in heat exchanger steam inlet, 10. built-in heat exchanger condensation-water drain, 11. discharging openings, 12. steam pipe coils.

(5) specific embodiment

Embodiment: structure such as Fig. 1-shown in Figure 5, form by upper box 3, lower box 7 and fluidisation section 5, wherein, upper box 3 has charging aperture 1 and air outlet 2, and its effect is charging and discharges the wind that has the material to be machined moisture; Lower box 7 has blower fan, air inlet 6 and discharging opening 11, and its effect is the power that is provided at motion under the dry environment for processed material, makes heat fully mix exchange with material, after the moisture of material inside is replaced out, discharges through air outlet 2.Fluidisation section 5 is connected between the upper and

lower casing

3,7, and its effect is to utilize the heating power of steam and dry material from the wind-force of lower box.Some groups of built-in heat exchangers 4 are arranged to the horizontal tube bundle form in the fluidisation section 5, and are vertically evenly distributed according to " U " shape.Such arrangement mode, make the resistance of material under fluidized state very little, do not influence the fluidized state of material, and material can contact fully with steam pipe coil 12, increase material and the effective area that steam pipe coil 12 contacts to greatest extent, improved heat exchange efficiency.Each built-in heat exchanger is formed by built-in heat exchanger drum 8, built-in heat exchanger steam inlet 9, built-in heat exchanger condensation-water drain 10 and steam pipe coil 12, the steam inlet 9 of built-in heat exchanger links to each other with built-in heat exchanger drum 8 with condensation-water drain 10, steam pipe coil 12 according to " U " shape vertical array on the fluidisation section, guaranteed that steam enters the uniformity of built-in heat exchanger 4, and bias current does not take place.As shown in Figure 4 and Figure 5.The steam thermal energy of built-in heat exchanger is provided by boiler, so built-in heat exchanger steam inlet 9, built-in heat exchanger condensation-water drain 10 are to be connected with the boiler of outside.The wind-force of lower box 7 is connected by electric blower, and electric blower is carried out and is electrically connected.

The course of work is as follows, when material when charging aperture 1 is poured into, effect leeward drive material at air blast begins to do random motion in fluidisation section 5, makes the moisture of material inside and the heat in the hot blast do heat exchange for the first time, and material becomes moisture into steam again when absorbing heat and emits.Because steam pipe coil 12 is vertically disposed according to " U " type, the resistance increase of material under fluidized state seldom can fully contact with steam pipe coil 12, increased the contact area of material and steam pipe coil 12 to greatest extent in fluidisation section 5.This moment, material was subjected to higher temperature and hot blast power more, make the moisture and the heat of material inside do heat exchange for the second time, material becomes moisture into steam again when absorbing heat and emits, the moisture of material inside at this moment reduces to the requirement of processing, then, be sent through discharging opening 11, finished the process of a processing this moment.Built-in heat exchanger 4 has played main thermal source effect in the drying and dehydrating process of material, and require the conventional fluid bed that compares much smaller as the power of fluidisation, so the required air quantity of the fluid bed of this band built-in heat exchanger is less relatively, the dust of taking out of is also few, so the conventional fluid bed of the pressure ratio of environmental protection is much smaller.Built-in heat exchanger drum 8 adopts stainless steel material with steam pipe coil 12, guarantees the service life of equipment.

Claims

1, a kind of fluid bed dryer with built-in heat exchanger, mainly form by upper box, lower box and fluidisation section, wherein, upper box comprises charging aperture and air outlet, lower box comprises blower fan, air inlet and discharging opening, the fluidisation section is connected between the upper and lower casing, it is characterized in that, the fluidisation section is provided with the built-in heat exchanger setting.

2, the fluid bed dryer of band built-in heat exchanger according to claim 1 is characterized in that, built-in heat exchanger is divided into some groups, is arranged to the horizontal tube bundle form, arranges in order according to " U " shape metal tube to be evenly distributed on the fluidisation section.

3, the fluid bed dryer of band built-in heat exchanger according to claim 1, it is characterized in that, each built-in heat exchanger is made up of equal built-in heat exchanger drum, built-in heat exchanger steam inlet, built-in heat exchanger condensation-water drain and steam pipe coil, the steam inlet of built-in heat exchanger all links to each other with the built-in heat exchanger drum with condensation-water drain, steam pipe coil according to " U " shape vertical array on the fluidisation section.