CN201313927Y

CN201313927Y - A microwave fluidized furnace for preparing magnesium calcined white

Info

Publication number: CN201313927Y
Application number: CNU2008201067352U
Authority: CN
Inventors: 李明照; 李琮; 许并社; 王跃琪; 卫英慧; 樊建峰
Original assignee: Taiyuan University of Technology
Current assignee: Taiyuan University of Technology
Priority date: 2008-11-14
Filing date: 2008-11-14
Publication date: 2009-09-23
Anticipated expiration: 2018-11-14

Abstract

The utility model relates to a microwave fluidized bed furnace for preparing magnesium calcining dolomite, which mainly comprises a furnace body, a furnace cradle, a furnace cover, a flexible fan housing filter screen, an air compressor, a microwave generator, a microwave controller, a temperature sensor, a screw feeder, a cyclonic dust collector, a cloth bag dust collector, a product box, a nitrogen bottle, a water circular condensing recovery box, an electric cabinet and a conducting wire. The furnace body is heated by microwave; dolomite powder is placed in a furnace cavity and is suspended and boiled by the blowing of the air compressor; the temperature sensor measures temperature information; the screw feeders feeds materials; a material discharge barrel and the cyclonic dust collector collect products which are protected by nitrogen; the cloth bag dust collector collects carbon dioxide gas which is liquefied and recovered by the water circular condensing recovery box; and the electric cabinet adopts a microcomputer control circuit. The utility model has reasonable design, compact structure, easy operation, high efficiency, high speed, high heating efficiency of microwave heating, no pollution to the environment and energy source saving, and is an ideal microwave fluidized bed furnace for preparing the magnesium calcining dolomite.

Description

A kind of microwave fluidized bed roaster for preparing magnesium calcined dolomite

Technical field

The utility model is a kind of microwave fluidized bed roaster for preparing magnesium calcined dolomite, belongs to nonferrous metallic ores roasting, preparation apparatus technology.

Background technology

Containing konite is the topmost raw material of refining MAGNESIUM METAL, must calcine rhombspar before the refining MAGNESIUM METAL, makes magnesium calcined dolomite, just can refine MAGNESIUM METAL then.

The calcining of rhombspar is normally carried out with shaft furnace or rotary kiln, whole calcination process is thermo-negative reaction, be to carry out heating furnace body in calcination process with coal gas or natural gas liquids, so that cause the furnace chamber internal heating slow, stove is outer seriously polluted, and thermo-efficiency is low, exist serious potential safety hazard, and wasted a large amount of energy and manpower and materials, and calcination efficiency is low, and product quality is poor.

Summary of the invention

Goal of the invention

The purpose of this utility model is exactly at disadvantages of background technology; design a kind of microwave fluidized bed roaster of usefulness calculation control completely newly; calcining preparation magnesium calcined dolomite; the design of adopting microwave heating, sensor temperature control, pressurized air, screw feeder, cyclone dust collection, bag collection, water cycle condensation recovery carbonic acid gas, nitrogen protection, electric control box to combine is to save the energy, to reduce calcination efficiency and the quality polluting, increase substantially magnesium calcined dolomite.

Technical scheme

The utility model primary structure by: microwave fluidized bed roaster body of heater, grate, fan housing filter screen, air compressor, microwave generator, microwave controller, temperature sensor, screw feeder, cyclone, bagroom, product case, nitrogengas cylinder, water cycle condensation collection box, electric control box, lead are formed; The top of tubular body of heater 2 is bell 1, and the bottom of body of heater 2 is a stove seat 15, and the bottom of stove seat 15 is a grate 16, and the bottom of grate 16 is an air compressor 35, and air compressor 35 connects with electric control box 9 by lead 6; In the body of heater 2 is furnace chamber 44, and the bottom is a fan housing filter screen 34 in the furnace chamber 44; In the furnace chamber 44 is rhombspar powder 42, pressurized air 43; Fan housing filter screen 34 bottoms are air compressed pipe 17 and connect air compressor 35; The right lower quadrant of furnace wall 3 is provided with opening for feed 32, and opening for feed 32 is aimed at and connected screw feeder 33, and rhombspar powder 42 is by in the screw feeder 33 spirt furnace chambers 44; Furnace wall 3 upper right quarters are provided with discharge barrel 22, discharge barrel 22 connects with air outlet 23, cyclone 25, cyclone 25 connects bagroom 20 by escape pipe 21, bagroom 20 connects water cycle cooling cylinder 19 by escape pipe 21, water cycle cooling cylinder 19 is provided with water inlet pipe 37, rising pipe 18, water intaking valve 36 is arranged on the water inlet pipe 37, and water cycle cooling cylinder 19 internal upper parts are that carbon dioxide 38, bottom are liquid carbon dioxide 39; The bottom of cyclone 25 is provided with discharge bucket 24, and discharge bucket 24 is aimed at the opening for feed of product case 31, and product case 31 connects nitrogen tube 29, nitrogen valve 28, nitrogengas cylinder 30, and the bottom is that magnesium calcined dolomite product 27, top are nitrogen 26 in the product case 31; The furnace wall 3 of body of heater 2 is provided with

temperature sensor

4,7,40,41, connects with electric control box 9 by lead 6; Be provided with

microwave generator

5,8 in the outside upper and lower position of body of heater 2,

microwave generator

5,8 connects with electric control box 9 by lead 6; Electric control box 9 tops are that liquid crystal display 10, bottom are provided with pilot lamp 11, microwave controller 12, air compressor switch 13, power switch 14, cyclone switch 45, bagroom switch 46, screw feeder switch 47 successively.

The circuit card of described electric control box 9, the centre is microcomputer pilot circuit IC1, be CPU, microcomputer pilot circuit IC1 passes through terminal, lead connects temperature sensor pilot circuit IC2 respectively, microwave heating pilot circuit IC3, microwave generator change-over circuit IC4, signal indicating circuit IC5, liquid crystal display circuit IC6, air compressor change-over circuit IC7, power supply switching circuit of voltage regulation IC8, pierce circuit IC9, screw feeder switch circuit IC10, cyclone switch circuit IC11, bagroom switch circuit IC12, each parallel circuit is formed whole pilot circuit.

Beneficial effect

The utility model is compared with background technology has tangible advance; microwave fluidized bed roaster is vertical structure; four temperature sensors are set on the body of heater furnace wall; can give electric control box the furnace chamber temperature information transmission at any time; bottom of furnace body is provided with flexible fan housing filter screen; the pressurized air that air compressor blows into is through the filter screen filtering; blowing the rhombspar powder presents; down; a left side; the right suspension fluidized calcination; the screw feeder of bottom, right side is imported powder in furnace chamber; the body of heater periphery divides; under microwave heater is set; and by temperature in the microwave controller control stove; in stove under 1030 ℃ of states of temperature; on the powder; down; a left side; right suspension boiling 15s can come out of the stove; the cyclone of right upper portion is collected product by discharge barrel; product magnesium calcined dolomite powder enters the product case; the carbon dioxide of discharging enters water cycle cooling cylinder condensation liquefaction by bagroom and reclaims; the product magnesium calcined dolomite is protected by nitrogen in the product case; electric control box is controlled by microcomputer program; can realize automated operation; this device is reasonable in design; compact construction; the efficient height; speed is fast; microwave heating is free from environmental pollution, the thermo-efficiency height; saving the energy, is the microwave fluidized bed roaster that ideal prepares magnesium calcined dolomite.

Description of drawings

Fig. 1 is microwave fluidized bed roaster one-piece construction figure

Fig. 2 is microwave fluidized bed roaster electrical control circuit figure

Shown in the figure, list of numerals is as follows:

1, bell, 2, body of heater, 3, the furnace wall, 4, temperature sensor, 5, microwave generator, 6, lead, 7, temperature sensor, 8, microwave generator, 9, electric control box, 10, liquid crystal display, 11, pilot lamp, 12, microwave controller, 13, air compressor switch, 14, power switch, 15, the stove seat, 16, grate, 17, the air compressed pipe, 18, rising pipe, 19, the water cycle cooling cylinder, 20, bagroom, 21, escape pipe, 22, discharge barrel, 23, air outlet, 24, discharge bucket, 25, cyclone, 26, nitrogen, 27, the magnesium calcined dolomite product, 28, nitrogen valve, 29, nitrogen tube, 30, nitrogengas cylinder, 31, the product case, 32, opening for feed, 33, screw feeder, 34, the fan housing filter screen, 35, air compressor, 36, water intaking valve, 37, water inlet pipe, 38, carbon dioxide, 39, liquid carbon dioxide, 40, temperature sensor, 41, temperature sensor, 42, the rhombspar powder, 43, pressurized air, 44, furnace chamber, 45, the cyclone switch, 46, the bagroom switch, 47, the screw feeder switch.

IC1, microcomputer pilot circuit, IC2, temperature sensor pilot circuit, IC3, microwave heating pilot circuit, IC4, microwave generator change-over circuit, IC5, signal indicating circuit, IC6, liquid crystal display circuit, IC7, air compressor pilot circuit, IC8, power supply voltage stabilizing rectifier switch circuit, IC9, pierce circuit, IC10, screw feeder switch circuit, IC11, cyclone switch circuit, IC12, bagroom switch circuit.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further:

Shown in Figure 1, be one-piece construction figure, it is to be that the center is arranged with tubular body of heater 2, grate 16, and left part is provided with electric control box 9, and connect with

microwave generator

5,8, air compressor 35, screw feeder 33, cyclone 25, bagroom 20 by lead 6, form one-piece construction.

For rhombspar powder and pressurized air carry out the suspend fluidized intracavity space in upper and lower, left and right, the volume of powder must not be greater than 2/3 of cavity in the furnace chamber 44, with guarantee powder suspend fluidized enough spaces is arranged.

Fan housing filter screen 34 is a flexible structure, plays the filtering effect, is used with air compressor, and pressurized air blows and can heave, and can put down when stopping.

Screw feeder 33,, just can seethe with excitement owing to compressed-air actuated blowing in the rhombspar powder input furnace chamber 44 immediately by hopper 32.

Microwave generator

5,8 and microwave controller 12 are used, so that the temperature in the control furnace chamber 44, and by

transmitter

5,8 its temperature values of measurement.

Discharge barrel 22 is at the upper right quarter of body of heater 2; connect cyclone 25; after gathering dust, the magnesium calcined dolomite powder that cyclone 25 is collected enters product case 31; and carry out nitrogen protection by nitrogengas cylinder 30; the carbon dioxide 38 of discharging is collected laggard entry circulating condensing case 19 by bagroom 20 and is carried out the condensation liquefaction recovery.

Electric control box 9 is the vertical cabinet structure, and top is liquid crystal display, can show each function and data, and the bottom is pilot lamp and each operating function switch, uses very convenient.

Shown in Figure 2, be the electrical control circuit of electric control box 9, be the center with the one-chip computer CPU of main body IC circuit 1, connect other each parallel circuits of control and every function.

One-chip computer CPU can adopt the microprocessor of 16 bit, also can adopt 32-bit microprocessor.

Connected by lead between each circuit, it is correct that connecting relation is wanted.

Claims

1. A microwave fluidized furnace for preparing magnesium calcined white is characterized in that: the main structure is composed of: microwave fluidized furnace body of furnace, furnace frame, air cover filter screen, air compressor, microwave generator, microwave controller, temperature sensor, screw feeder feeder, cyclone dust collector, bag dust collector, product box, nitrogen bottle, water cycle condensation recovery box, electric control box, and wires; the upper part of the cylindrical furnace body (2) is the furnace cover (1), and the furnace body ( 2) the bottom of the furnace base (15), the bottom of the furnace base (15) is a furnace frame (16), the bottom of the furnace frame (16) is an air compressor (35), and the air compressor (35) passes through the wire (6 ) is connected with the electric control box (9); in the body of heater (2) is a furnace chamber (44), and the lower part of the furnace chamber (44) is a wind cover filter screen (34); in the furnace chamber (44) is dolomite powder ( 42), compressed air (43); the lower part of the air cover filter screen (34) is an air compression pipe (17) and connected to the air compressor (35); the lower right part of the furnace wall (3) is provided with a feed port (32), The feeding port (32) is aligned and connected with the screw feeder (33), and the dolomite powder (42) is sprayed into the furnace cavity (44) through the screw feeder (33); The discharge cylinder (22), the discharge cylinder (22) is connected with the air outlet (23) and the cyclone dust collector (25), and the cyclone dust collector (25) is connected with the bag dust collector (20) through the air outlet pipe (21) , the bag filter (20) is connected to the water circulation condensation box (19) through the air outlet pipe (21), the water circulation condensation box (19) is provided with a water inlet pipe (37), a water outlet pipe (18), and the water inlet pipe (37) has a The water inlet valve (36), the upper part in the water circulation condensing box (19) is carbon dioxide gas (38), and the lower part is liquid carbon dioxide (39); the bottom of the cyclone dust collector (25) is provided with a hopper (24), and the hopper ( 24) Align the feed port of the product box (31), the product box (31) is connected to the nitrogen pipe (29), nitrogen valve (28), nitrogen cylinder (30), and the lower part of the product box (31) is magnesium calcined white product (27), the upper part is nitrogen (26); the furnace wall (3) of the furnace body (2) is provided with temperature sensors (4, 7, 40, 41), connected with the electric control box (9) by wires (6) ; The outer upper and lower positions of the body of heater (2) are provided with microwave generators (5, 8), and the microwave generators (5, 8) are connected with the electric control box (9) by wires (6); the electric control box ( 9) The upper part is a liquid crystal display (10), and the lower part is provided with an indicator light (11), a microwave controller (12), an air compressor switch (13), a power switch (14), and a cyclone dust collector switch (45) , Bag filter switch (46), screw feeder switch (47).

2. A kind of microwave fluidized furnace for preparing magnesium calcined white according to claim 1 is characterized in that: the middle of the circuit board of described electric control box (9) is microcomputer control circuit (IC1), i.e. CPU, microcomputer The control circuit (IC1) is respectively connected to the temperature sensor control circuit (IC2), microwave heating control circuit (IC3), microwave generator conversion circuit (IC4), signal indication circuit (IC5), liquid crystal display circuit (IC6), Air compressor conversion circuit (IC7), power supply voltage regulator switch circuit (IC8), oscillator circuit (IC9), screw feeder switch circuit (IC10), cyclone dust collector switch circuit (IC11), bag filter switch Circuit (IC12), each sub-circuit constitutes the overall control circuit.