CN209371786U - Heat accumulating type reduction furnace - Google Patents

Abstract

The utility model discloses heat accumulating type reduction furnaces, including furnace body, air blower and air-introduced machine, the opposite two sides of the furnace body are respectively arranged with multiple wind boxes, the quantity of the wind box of two sides is equal, the lower section or side of each wind box are provided with a corresponding burner, heat storage is provided in the wind box, the air holes being provided with inside and outside connection furnace body in heat storage.The utility model has the advantages that multiple wind boxes are respectively set in furnace body two sides in the present apparatus, heat storage is set in wind box, it can disperse recovery waste heat, exhaust gas temperature is down to 100 DEG C or less, pre- heat recovery rate 85%, and air themperature can be preheated to 1000 DEG C or so, furnace thermal efficiency is up to 50~65%, and energy conservation reaches 35~50%.

Description

Heat accumulating type reduction furnace

Technical field

The utility model relates to chemical production field, the reduction furnace that is related specifically in Chemical Manufacture, and in particular to a kind of Heat accumulating type reduction furnace.

Background technique

Magnesium metal, calcium, zinc, strontium require reduction furnace this core equipment and are produced, and what is generallyd use both at home and abroad is outer Heated horizontal type reductive jar reduction furnace.Traditional reduction furnace is generally using the structure for returning heat heating reductive jar.This traditional structure is gone back Flame and flue gas in former furnace climb over firebreak and enter burner hearth, pass through reductive jar from top to bottom, cracking that furnace is discharged by crossing fire hole Thorax, exhaust gas temperature can be up to 1200 DEG C or so, cannot recycle well, energy waste is serious.In addition, traditional reduction Furnace uses raw coal as fuel, and efficiency of combustion is low, seriously polluted.And this combustion system leads to temperature inside reduction furnace burner hearth Degree is uneven, and ignition temperature control is not flexible, causes that the reductive jar service life is generally too short, and the finished metal quality produced is not high.

Regenerative high temperature combustion technology technology is current combustion technology advanced in the world, is exactly all cloth on the furnace wall of stove two sides It is equipped with the spout evenly distributed, when the spout of side is when as burner combustion, the spout of the other side is then used as flue to use To discharge fume.After a commutation cycle, by the switching of reversal valve, the side spout as burner combustion becomes flue and is used to Smoke evacuation, and the other side spout for being used to discharge fume originally is then used as burner combustion.Like this alternately, heating, cigarette are completed at the same time The high efficiente callback of gas heat and the high temperature preheating of air.Smoke evacuation side spout enters regenerative chamber through high temperature gas passage, in regenerative chamber Interior to be exchanged by carrying out heat with heat storage, temperature can be down to 150 DEG C hereinafter, then going out regenerative chamber, by reversal valve, air inducing Machine is finally discharged into atmosphere by chimney.At the same time, air entered the other side within a upper commutation cycle by high-temperature flue gas The high-temperature regenerator of preheating, while 900~1050 DEG C are preheated to, pass through stove side wall through high temperature gas passage after regenerative chamber out Spout sprays, and the high temperature air and fuel sprayed from spout burns on burner hearth inner edge mixing side.

But a regenerative chamber is respectively arranged in present reduction furnace two sides, and waste heat is all centralized recovery, close to the accumulation of heat of nozzle To know from experience and absorbs a large amount of heat, the heat that the heat storage far from spout absorbs, that is, seldom, a large amount of heat, which is concentrated, passes through heat storage, So that heat storage absorbs endless heat at this, causes heat absorption imperfect and heat storage utilizes not high problem.

Utility model content

The purpose of this utility model is to provide heat accumulating type reduction furnaces, to solve existing reduction furnace because of centralized recovery waste heat The caused lower defect of waste heat recovery volume.

To achieve the above object, the technical solution of the utility model is heat accumulating type reduction furnace, including furnace body, air blower and is drawn Blower, the opposite two sides of the furnace body are respectively arranged with multiple wind boxes, and the quantity of the wind box of two sides is equal, under each wind box Side or side are provided with a corresponding burner, and heat storage is provided in the wind box, connection furnace body is provided in heat storage Inside and outside air holes；

All wind boxes of furnace body side all pass through pipeline and are communicated on the first valve port of reversal valve, and the furnace body other side owns Wind box all passes through pipeline and is communicated on the second valve port of reversal valve, and the air outlet of air blower is communicated to the of reversal valve by pipeline On three valve ports, the air inlet of air-introduced machine is communicated on the 4th valve port of reversal valve by pipeline, and the reversal valve includes two kinds State, when reversal valve is in first state, first valve port is connected to third valve port, and second valve port is connected to the 4th valve port； When reversal valve is in the second state, first valve port is connected to the 4th valve port, and second valve port is connected to third valve port；

The heat storage is mounted in wind box by mounting rack, and the size of the mounting rack is matched with wind box, installation Multiple heat storage tanks are provided on frame, the heat storage tank is square, and the lower end surface of heat storage tank towards external port is provided with first baffle, The lower end surface of heat storage tank towards inner port is provided with second baffle, and heat storage is placed in heat storage tank, and heat storage is also square, Length and width is matched with heat storage tank, and the difference between the height of heat storage and the height of heat storage tank is the height of first baffle.

Further, the heat storage uses honeycomb brick, and a large amount of through-hole is arranged in honeycomb brick, these, inside and outside furnace body, It is connected to by the air holes of honeycomb brick, air blower sucks outside air, and air is communicated to wind box through pipeline, from the wind of honeycomb brick Hole enters in furnace body, and generates negative pressure after air-introduced machine air-breathing at wind box, so that the intracorporal air of furnace is from the air holes of honeycomb brick It is externally discharged through air-introduced machine into pipeline.

Further, the mounting rack is fixed by screws in wind box, and mounting rack can be disassembled from wind box, when Heat storage is crushed in mounting rack, and broken live together manages unclean, i.e., detachable mounting rack, facilitates whole cleaning mounting rack.

Further, the upper surface of the heat storage tank towards inner port is provided with third baffle, and the third baffle Height is consistent with the height of first baffle.

Air pours in wind box, into heat storage, enters in furnace body through air holes, but the upper surface of heat storage and heat storage tank it Between also have the gap, which, which will appear, leaks out, which substantially reduce the heat exchange effect of heat storage, so being provided with the Three baffles, the air passed through to the gap stop, so that air can only enter in furnace body through air holes, heat storage and air Contact surface increases, and heat exchange effect is guaranteed, and the altitude information of third baffle can not be too big, not so can stop air circulation.

Further, the height of the second baffle is not more than the height of first baffle, and second baffle is excessively high, it is likely that Air holes can be blocked, it is consistent with the height of first baffle or best lower than the height of first baffle.

Further, the one of side of the first baffle and mounting rack are hinged, another side and mounting rack spiral shell Nail is fixed, and after the screw on first baffle is removed, can be opened, and the convenient residual miscellaneous progress to the heat storage occurred in heat storage tank is clear Reason.

Further, the control terminal of the reversal valve is connected on the time relay, and the control terminal of the reversal valve is touched It is dynamic primary, that is, understand switching state, the time relay can act once within the set time, so that the control terminal of reversal valve is touched, So that reversal valve switching state.

The utility model has the advantages that

(1) multiple wind boxes are respectively set in furnace body two sides in the present apparatus, and heat storage is arranged in wind box, can disperse more than recycling Heat, exhaust gas temperature is down to 100 DEG C hereinafter, pre- heat recovery rate 85%, and air themperature can be preheated to 1000 DEG C or so, stove The thermal efficiency is up to 50~65%, and energy conservation reaches 35~50%；

(2) heat storage of the present apparatus is arranged in wind box by mounting rack, and outside is all arranged in the heat storage tank on mounting rack There is baffle, heat storage can enter heat storage tank from outer baffle upper end, fall between interior outer baffle, when such air blast and air inducing, store Heat is known from experience to be clamped by interior outer baffle, is not in displacement, and the event for avoiding heat storage from falling into furnace body occurs, and present apparatus accumulation of heat The process of the installation and removal of body is very simple；

(3) baffle is arranged in upper end of the present apparatus on the inside of mounting rack, so that air can only be from the stomata of heat storage Into furnace body, guarantee heat exchange effect.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of embodiment 1；

Fig. 2 is furnace body side schematic view in embodiment 1；

Fig. 3 is the positive structure schematic of mounting rack in embodiment 1；

Fig. 4 is in cross-sectional view when first state for reversal valve in embodiment 1；

Fig. 5 is in cross-sectional view when the second state for reversal valve in embodiment 1；

Fig. 6 is the structure schematic diagram of mounting rack in embodiment 2；

Fig. 7 is the positive structure schematic of the mounting rack of embodiment 3.

Specific embodiment

The following examples illustrate the utility model, but is not intended to limit the scope of the present invention.

Embodiment 1

As shown in Figs. 1-5, heat accumulating type reduction furnace, including furnace body 1, air blower 2 and air-introduced machine 3, the furnace body 1 are opposite Two sides are respectively arranged with multiple wind boxes 101, and the quantity of the wind box 101 of two sides is equal, the lower section of each wind box 101 or side setting There is a corresponding burner 102, be provided with heat storage 103 in the wind box 101, connection furnace body 1 is provided in heat storage 103 Inside and outside air holes 104；

All wind boxes 101 of 1 side of furnace body are all communicated on the first valve port 401 of reversal valve 4 by pipeline, and furnace body 1 is another All wind boxes 101 of side are all communicated on the second valve port 402 of reversal valve 4 by pipeline, and the air outlet of air blower 2 passes through pipe Road is communicated on the third valve port 403 of reversal valve 4, and the air inlet of air-introduced machine 3 is communicated to the 4th valve port of reversal valve 4 by pipeline On 404, the reversal valve 4 includes two states, and when reversal valve 4 is in first state, first valve port 401 is connected to third Valve port 403, second valve port 402 are connected to the 4th valve port 404；When reversal valve 4 is in the second state, first valve port 401 It is connected to the 4th valve port 404, second valve port 402 is connected to third valve port 403；

The heat storage 103 is mounted in wind box 101 by mounting rack 5, the size and wind box of the mounting rack 5 101 matchings, are provided with multiple heat storage tanks 501 on mounting rack 5, and the heat storage tank 501 is square, and heat storage tank 501 is towards external port Lower end surface be provided with first baffle 502, the lower end surface of heat storage tank 501 towards inner port is provided with second baffle 503, heat storage 103 are placed in heat storage tank 501, and heat storage 103 is also square, and length and width is matched with heat storage tank 501, heat storage Difference between 103 height and the height of heat storage tank 501 is the height of first baffle 502.

In the present apparatus, when reversal valve 4 typical two-position four-way valve, such as Fig. 4, Fig. 5, the state of reversal valve 4 passes through motor and turns Dynamic valve, 405 control, and spool 405 every time appraises and decides as 90 degree of rotation by rotation, that is, the rate of rotation for setting motor ensures that angle of rotation Degree, and after spool 405 rotates 90 degree every time, allowing for valve port connection changes, and only there are two types of variation, Fig. 4 first State: first valve port 401 is connected to third valve port 403, and second valve port 402 is connected to the 4th valve port 404；Fig. 5 is second State: first valve port 401 is connected to the 4th valve port 404, and second valve port 402 is connected to third valve port 403, and spool 405 is not Break during being rotated by 90 °, reversal valve 4 then can only switch in the two states.First by the first valve port of connection 401 of furnace body 1 Side is set as the side A, then the other side is the side B.When first state, A crosswind box 101 is communicated to air blower 2, and B crosswind box 101 is connected to To air-introduced machine 3, at this point, outside air is blown into A crosswind box 101 by air blower 2, by heat storage 103 air holes 104 when, it is empty Gas can generate heat exchange with heat storage 103, and heat storage 103 be the condition of high temperature this moment, atmosphere temperature rising, and the side A heat storage 103 cools down, Then high temperature air enters in furnace body 1, and high temperature air mixes combustion with the fuel for entering furnace body 1 from the burner 102 on 101 side of wind box It burns；And 3 exhausting of air-introduced machine at this time, so that forming negative pressure at B crosswind box 101, the high temperature air in furnace body 1 can be from B crosswind box 101 Place flow to outside, by the side B heat storage 103 air holes 104 when, the side B heat storage 103 is low-temperature condition this moment, after heat exchange, The side B heat storage 103 heats up, and high temperature air can cool down, be discharged in atmosphere from air-introduced machine 3.When the second state, A crosswind box 101 It is communicated to air-introduced machine 3, B crosswind box 101 is communicated to air blower 2, and air circulation process is opposite with first state.

Heat storage 103 is fixed in wind box 101 by mounting rack 5, and heat storage 103 is such as rest directly upon in wind box 101, meeting Displacement is constantly generated by the thrust that air circulation drives, is constantly rubbed between heat storage, broken, production gap, shadow can be generated The integrality and heat-exchange capacity for arriving heat storage are rung, and is likely to the event that heat storage 103 is fallen into furnace body 1 occur, institute There is the present apparatus to be provided with mounting rack 5, the isolation of all heat storages 103 is placed in heat storage tank 501 first, between heat storage 103 It will not be in contact and rub, and heat storage 103 is fixed by the first baffle 502 of front and back, second baffle 503, air The thrust that circulation generates will not have an impact heat storage 103, so ensure that the stability of heat storage 103.

The heat storage 103 of the present apparatus uses honeycomb brick, 5 layers of honeycomb brick is stacked in a wind box 101, every layer has 25 bees Nest brick, honeycomb brick enter heat storage tank from the leaving space between heat storage tank 501 of first baffle 502 by gripping apparatus grips 501, it then places, falls between first baffle 502 and second baffle 503,

The present apparatus is horizontal reduction furnace, long 10.65m, wide 6.5m, high 2.9m.Above and below the every side the wide side of reduction furnace (6.5m) Two rows of respectively 8 wind boxes of installation, install 32 wind boxes altogether.

The mounting rack 5 of the present apparatus is fixed by screws in wind box 101, and after damage occurs in mounting rack 5, the clothes made of brocade is easily Replacement repairing is carried out to mounting rack 5 because honeycomb brick also will appear in continuous high temperature low-temperature circulating it is broken, detachably Mode it is convenient mounting rack 5 is completely cleared up, avoid in mounting rack 5 that residual honeycomb brick is residual miscellaneous, honeycomb brick caused to stack Out-of-flatness influences heat transfer effect.

The height of the second baffle 503 of the present apparatus is not more than the height of first baffle 502.Second baffle 503 can be lower than First baffle 502, as long as having blocking effect, and second baffle 503 is excessively high, then can stop to enter from outside by air holes The air of furnace body reduces the ventilation effect of heat storage 103, reduces with the contact area of air, heat exchange effect also phase It should reduce.

Present apparatus reversal valve 4 is air operated reversing valve, and valve rod is controlled by the compressed air of cylinder, and compressed air passes through electromagnetism Valve control, the control terminal of solenoid valve are connected on the time relay 6, and the reversal valve 4 is air operated reversing valve, cylinder and electromagnetism The combination of valve, the control terminal of reversal valve 4 are exactly the control terminal of solenoid valve, and the control terminal of reversal valve 4 is touched once, i.e., can cut Change state.The time relay 6 can not be spaced 30S starting once, send a command to reversal valve 4, reversal valve 4 turns with regard to control valve core It is 90 degree dynamic, thus switching state.

Embodiment 2

Such as Fig. 6, the present embodiment and the structure of embodiment 1 are almost the same, the difference is that 501 court of heat storage tank of the present apparatus The height that the upper surface of inner port is provided with 504 third baffle 504 of third baffle is consistent with the height of first baffle 502.

Heat storage 103 is placed in heat storage tank, and there are gap, the width and first baffle in the gap with heat storage tank top surface Height it is consistent, air is entered in furnace body by the gap, and the contact area of air and heat storage substantially reduces in the gap, shadow It rings and arrives heat exchange effect, so being provided with third baffle 504, which is stopped, and third baffle 504 also can not be too high, In order to avoid stopping the air holes in heat storage 103.

Embodiment 3

Such as Fig. 7, the present embodiment and the structure of embodiment 1 are almost the same, difference the first baffle 502 wherein A side and mounting rack 5 it is hinged, another side is fixed with 5 screw of mounting rack.

Heat storage 103 uses honeycomb brick, and in the long-term use, because of cold cycling, honeycomb brick is likely to brokenly It splits, fragment stays in heat storage tank 501, bad direct cleaning, and mounting rack 5 is disassembled cleaning also hell to pay, so by the One baffle 502 be designed to it is openable, open first baffle 502 after, that is, be convenient to clear up heat storage tank 501.

Claims (8)

1. heat accumulating type reduction furnace, which is characterized in that including furnace body (1), air blower (2) and air-introduced machine (3), the furnace body (1) Opposite two sides are respectively arranged with multiple wind boxes (101), and the quantity of the wind box (101) of two sides is equal, under each wind box (101) Side or side are provided with a corresponding burner (102), are provided with heat storage (103), heat storage in the wind box (101) (103) air holes (104) being provided in inside and outside connection furnace body (1)；

All wind boxes (101) of furnace body (1) side are all communicated on the first valve port (401) of reversal valve (4) by pipeline, furnace body (1) all wind boxes (101) of the other side are all communicated on the second valve port (402) of reversal valve (4) by pipeline, air blower (2) Air outlet be communicated on the third valve port (403) of reversal valve (4) by pipeline, the air inlet of air-introduced machine (3) passes through pipeline and connects It leads on the 4th valve port (404) of reversal valve (4), the reversal valve (4) includes two states, and reversal valve (4) is in first When state, first valve port (401) is connected to third valve port (403), and second valve port (402) is connected to the 4th valve port (404)； When reversal valve (4) is in the second state, first valve port (401) is connected to the 4th valve port (404), second valve port (402) It is connected to third valve port (403)；

The heat storage (103) is mounted in wind box (101) by mounting rack (5), the size and wind of the mounting rack (5) Box (101) matches, and is provided with multiple heat storage tanks (501) on mounting rack (5), the heat storage tank (501) is square, heat storage tank (501) it is provided with first baffle (502) towards the lower end surface of external port, the lower end surface of heat storage tank (501) towards inner port is provided with Two baffles (503), heat storage (103) are placed in heat storage tank (501), and heat storage (103) is also square, length and width It is matched with heat storage tank (501), the difference between the height of heat storage (103) and the height of heat storage tank (501) is first baffle (502) height.

2. a kind of reduction furnace as described in claim 1, which is characterized in that the heat storage (103) uses honeycomb brick.

3. a kind of reduction furnace as described in claim 1, which is characterized in that the mounting rack (5) is fixed by screws in wind In box (101).

4. a kind of reduction furnace as described in claim 1, which is characterized in that the heat storage tank (501) is towards the upper end of inner port Face is provided with third baffle (504).

5. a kind of reduction furnace as claimed in claim 4, which is characterized in that the height and first of the third baffle (504) The height of baffle (502) is consistent.

6. a kind of reduction furnace as described in claim 1, which is characterized in that the height of the second baffle (503) is not more than The height of first baffle (502).

7. a kind of reduction furnace as described in claim 1, which is characterized in that described first baffle (502) the one of side Hingedly with mounting rack (5), another side is fixed with mounting rack (5) screw at end.

8. a kind of reduction furnace as described in claim 1, which is characterized in that when the control terminal of the reversal valve (4) is connected to Between on relay (6), the control terminal of the reversal valve (4) is touched once, that is, understands switching state.