CN212108468U

CN212108468U - Anti-scaling combined flue gas heater

Info

Publication number: CN212108468U
Application number: CN202020415244.7U
Authority: CN
Inventors: 陈超
Original assignee: Jinan Hongzhu Technology Co ltd
Current assignee: Jinan Hongzhu Technology Co ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2020-12-08
Anticipated expiration: 2030-03-27

Abstract

An anti-scaling combined flue gas heater comprises a burner body, a voltage-stabilized power supply, a time control circuit, an electromagnetic valve and an air compressor, wherein an exhaust pipe of the burner body is polygonal, nozzles are arranged at intervals at the upper end of the exhaust pipe, and one end of the exhaust pipe is installed with an outer pipe of the burner body; the outer pipe is provided with a water pipe, the outer side of the exhaust pipe is provided with a spray pipe, and the spray pipe is connected with one end of the water pipe; a plurality of spray pipes are arranged between the upper ends of the spray pipes; the other end of the water pipe is connected with a tap water pipe through a first electromagnetic valve; the outer pipe is provided with a vent pipe which is connected with an exhaust pipe of an air storage tank of the air compressor through a second electromagnetic valve; the stabilized voltage supply and the time control circuit are arranged in the element box and connected by wiring. This is novel in, under time control circuit etc. effect, the water spray utilizes expend with heat and contract with cold to make impurity, the cigarette dirt of adhesion at nozzle spout hole side etc. drop as far as possible to can also fill compressed air after the scale removal and weather residual moisture in the blast pipe and impurity in the nozzle, guaranteed next time can normally ignite the use.

Description

Anti-scaling combined flue gas heater

Technical Field

The utility model relates to a combustor equipment technical field, especially a combined flue gas heater of preventing scale deposit.

Background

In industrial production, flue gas discharged from many devices during operation needs to be heated and then discharged into the atmosphere (such as flue gas discharged from a sintering process in a steel plant) after being treated by a desulfurization method. The main purpose of heating is to prevent corrosion caused by low temperature of flue gas (low temperature corrosion of flue gas means that flue gas is lower than dew point temperature and can corrode flues, fans, chimneys and the like) and to improve the lifting height of flue gas (the main purpose is to prevent harm caused by overhigh concentration of local sulfur dioxide in peripheral areas of chimneys). The mode of directly heating the flue gas in the flue by using the natural gas burner or the fuel oil burner can save fuel gas and fuel oil, greatly save engineering cost and site area, and has the advantages of low cost, simple structure and few faults, so that the application is more and more extensive.

The existing natural gas burner for heating flue gas in a flue mainly comprises an outer pipe, an igniter, a blower and the like, wherein the blower inputs air in the outer pipe in a proper proportion and outputs natural gas to the outer pipe to be mixed with the air during working, then the natural gas enters the flue from an exhaust pipe (a straight strip-shaped pipeline and positioned at the inner side end of the flue) at the front end of the outer pipe, and the igniter ignites the gas to enter the flue gas heating process. Because the existing natural gas burner or atomized fuel oil burner only has one nozzle (the nozzle is also a burning point and is positioned at the front end of the exhaust pipe), the generated fire source is concentrated around the burner, and the inner diameter of the flue is larger, the heating of the smoke outside the fire source can not be ensured particularly, and the heating effect of the smoke is influenced. Furthermore, in the existing natural gas burner or atomized fuel oil burner for heating flue gas in a flue, because the nozzle of the burner is small in open pore, various impurities contained in flue gas and soot generated by combustion easily block the orifice of the nozzle partially or even completely, so that the combustion efficiency of a subsequent burner is reduced, and even the burner stops combustion due to the blockage of the nozzle, thereby causing influence on the normal work of the burner. Based on the above, it is particularly necessary to provide a flue gas heater which can not only heat the flue gas in the flue as much as possible, but also prevent the nozzle orifice from being blocked.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects that the existing natural gas burner for heating the flue gas in the flue cannot ensure that the flue gas outside a fire source is heated due to the structure limitation, the heating effect of the flue gas can be influenced, and the flue gas contains various impurities, and the smoke scale generated by combustion easily blocks the spray hole part or even completely blocks the spray hole part of the nozzle, so that the combustion efficiency of the subsequent burner is reduced, and even the combustion is stopped due to the blockage of the nozzle, thereby influencing the normal work of the burner, the utility model provides a natural gas burner which is provided with a plurality of gas nozzles, wherein the plurality of gas nozzles are distributed in a plurality of directions, the flame generated by combustion can ensure that the flue gas in the flue can be fully heated as far as possible, and when the natural gas burner is closed and used each time, a user can carry out automatic water spraying and scale removing operation as required, and the impurities and the smoke scale adhered to the side of the spray hole, compressed air can be filled into the descaling device to blow dry residual moisture in the exhaust pipe and impurities in the nozzle, and the descaling combined type flue gas heater can be used for normal ignition next time.

The utility model provides a technical scheme that its technical problem adopted is:

an anti-scaling combined flue gas heater comprises a natural gas burner body, a voltage-stabilized power supply, a time control circuit, an electromagnetic valve and an air compressor, and is characterized in that an exhaust pipe of the gas burner body is polygonal, a plurality of nozzles are arranged at the upper end of the exhaust pipe at intervals, and one end of the exhaust pipe is installed with an outer pipe of the natural gas burner body; the outer pipe is provided with a water pipe, the outer side of the exhaust pipe is provided with a spray pipe with one end of a closed structure, and the other end of the spray pipe is connected with one end of the water pipe; the upper ends of the spraying pipes are spaced by a plurality of spraying pipes; the other end of the water pipe is connected with a tap water pipe through a first electromagnetic valve; the outer pipe is provided with a vent pipe, and the vent pipe is connected with an exhaust pipe of a gas storage tank of the air compressor through a second electromagnetic valve; the gas burner body is arranged outside the side end of the flue, and the exhaust pipes are all positioned in the flue; the stabilized voltage supply and the time control circuit are arranged in the element box; the power output two ends of the stabilized voltage power supply and the power input two ends of the first path of time control circuit are respectively electrically connected, the first path of power output two ends of the first path of time control circuit and the power input two ends of the second path of time control circuit are respectively electrically connected, the second path of power output two ends of the first path of time control circuit and the power input two ends of the first electromagnetic valve are respectively electrically connected, and the second path of time control circuit and the power input two ends of the second electromagnetic valve are respectively electrically connected.

Further, the stabilized voltage supply is an alternating current to direct current switching power supply module.

Furthermore, the first path of time control circuit comprises a microcomputer time control switch and a relay, the microcomputer time control switch and the relay are connected through circuit board wiring, two ends of a power supply input of the time control switch are respectively connected with two control power supply input ends of the relay, and two power supply output ends of the time control switch are respectively connected with two power supply input ends of the relay.

Furthermore, the second path of time control circuit is a microcomputer time control switch.

Furthermore, the other multiple ends of the exhaust pipe are of a closed structure, and the height of the upper end of the nozzle of the exhaust pipe is lower than that of the inner lower part of the outer pipe.

Further, the two electromagnetic valves are normally closed valve core electromagnetic valves.

The utility model has the advantages that: the rest use processes and the principle of the novel gas burner body are completely consistent with the working principle and the use process of the natural gas burner for heating smoke in a flue in the prior art. This is novel owing to have cross heating pipe (blast pipe), and the length and the width of blast pipe are close inside length of flue and width, and the blast pipe upper end has a plurality of nozzles, and flame can multiple spot evenly distributed in the flue in the burning, and the flame that the burning produced can guarantee as far as possible that the flue gas can both obtain the intensive heating in the flue, has prevented the bad consequence that flue gas low temperature produced. This is novel, when closing the use at every turn, the user can carry out automatic water spray scale removal operation as required, under the effect of two way time control circuit etc, utilizes expend with heat and contract with cold to make impurity, the cigarette dirt of adhesion at nozzle spout hole side etc. drop as far as possible to can also fill into compressed air after the scale removal and weather residual moisture in the blast pipe and impurity in the nozzle, guaranteed that can normally ignite the use next time. Based on the above, so this novel application prospect that has.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic plan view of the present invention;

fig. 2 is a circuit diagram of the present invention.

Detailed Description

As shown in fig. 1, an anti-scaling combined type flue gas heater comprises a gas burner body 9 having an outer tube 1, an igniter 2 and a blower, an exhaust pipe 3, etc., and a regulated power supply 4, a time control circuit 5,

solenoid valves

61 and 62, an air compressor, an air pipe 101 at the upper rear end of an outer pipe 1 is connected with an exhaust pipe of a blower through a pipeline and a pipeline joint, a gas pipe 102 at the lower rear end of the outer pipe 1 is connected with a natural gas supply pipe through a pipeline and a pipeline joint, an igniter 2 is transversely positioned in the outer pipe 1, the front end of the igniter is positioned outside the upper end of the outer pipe 1, the rear end of the igniter is positioned outside the upper part of the rear end of the outer pipe 1, the ignition head of the igniter 2 is positioned at one nozzle side end of the rear part of the upper end of the exhaust pipe 3, one-way gas valve is respectively connected in series between the air pipe 101 and a discharge pipe of the blower and between the gas pipe 102 and the natural gas pipe, external air and natural gas can; the exhaust pipe 3 of the gas burner body is cross-shaped, nine openings are formed in the upper end of the exhaust pipe 3 at a certain interval, a nozzle 31 (the nozzle 31 has an upward spray hole) is welded on each opening, the rear end of the exhaust pipe 3 is welded with the opening in the front middle of the outer pipe 1 of the burner body, and the exhaust pipe 3 is communicated with the inner space of the outer pipe 1; a water pipe 32 is transversely welded at the upper end inside the outer pipe 1, the rear end of the water pipe 32 is positioned outside the rear end of the outer pipe 1, the front end of the water pipe is positioned outside the front end of the outer pipe 1 (the front part of the water pipe is led forwards through a front end hole of the outer pipe 1, the rear part of the water pipe is led backwards through a rear end hole of the outer pipe 1, the contact parts of the water pipe and the front end hole and the rear end hole of the outer pipe 1 are welded and sealed), a spray pipe 7 with a closed structure at one end is respectively welded at the right part and the left part of the front end of the exhaust pipe 3, the other ends of the two spray pipes 7 without a closed part are respectively welded with two ends of a three-way pipe, the third end of the three-way pipe is welded with the front end of the water; a plurality of ┍ -shaped small spray pipes 71 are vertically welded at the upper end of the spray pipe 7 at a certain distance, a corresponding small spray pipe 71 is arranged at the side end of each nozzle 31 at the upper end of the exhaust pipe 3, and the upper parts of the small spray pipes 71 are obliquely and downwards aligned to the periphery of the nozzle 31; the rear end of the water pipe 31 is connected with the water outlet of the first electromagnetic valve 61 through threads, and the water inlet of the first electromagnetic valve 61 is connected with a tap water pipe through a hose; the lower end of the rear side of the outer pipe 1 is welded with a vent pipe 8 communicated with the interior of the outer pipe, the right end of the vent pipe 8 is in threaded connection with an exhaust port of a second electromagnetic valve 62, and an air inlet of the second electromagnetic valve 62 is connected with an exhaust pipe of an air storage tank of an air compressor through a hose; the gas burner body is arranged outside the side end of the flue through a circular fixing plate 103 outside the front end of the outer pipe, and the exhaust pipe 3 is completely positioned in the flue; the stabilized voltage power supply 4 and the time control circuit 5 are arranged on a circuit board in an element box 10, and the element box 10 is arranged in an electrical control box. The other three ends of the exhaust pipe 3 are of a closed structure, the exhaust pipe 3 and the outer pipe 1 are positioned in the flue, the front end of the exhaust pipe is low in height, the rear end of the exhaust pipe is high in height, the upper end of the nozzle 31 is lower than the lower portion of the outer pipe 1 by 1cm in height, and water is prevented from entering the outer pipe 1.

In FIG. 2, regulated power supply A1 is a finished product of a 220V AC to 12V DC switching power supply module of model CDKU-S, model Delwex, with a power of 200W. The first path of time control circuit comprises a microcomputer time control switch finished product A2 and a relay K1 which are made of ELECALL and have the model of KG316T-1DC12V, the microcomputer time control switch finished product A2 and the relay K1 are connected through circuit board wiring, two

ends

1 and 2 of a power supply input of the time control switch A2 are respectively connected with two control power supply input ends of the relay K1, and two power

supply output ends

3 and 4 of the time control switch A2 are respectively connected with two power supply input ends of the relay K1. The second circuit is microcomputer time control switch product A3 of brand ELECALLL, model KG316T-1DC 12V. The microcomputer time control switch finished products A2, A3 have liquid crystal display screens, and cancel/resume, time correction, week correction, automatic/manual, timing, clock keys, and also have two

power input ends

1 and 2 pins, two

power output ends

3 and 4 pins, in practical application, a user respectively operates seven keys, the time of the power output ends 3 and 4 pins can be set, the internal circuit of the microcomputer time control switch finished product has a memory function, and the power failure of the external power supply can not cause the change of the time program of the last internal setting as long as the secondary manual setting adjustment is not carried out. The two electromagnetic valves DC and DC1 are 12V normally closed valve core electromagnetic valves of Darlichi brand, and have power of 2W. Two

ends

1 and 2 of power input of a stabilized power supply A1 are respectively connected with two poles of an alternating current 220V power supply through leads, two

ends

3 and 4 of power output of the stabilized power supply A1 are respectively connected with two

ends

1 and 2 of a power input two-end time control switch A2 of a first path of time control circuit through leads, two normally closed contact ends of a first path of power output two-end relay K1 of the first path of time control circuit and two

ends

1 and 2 of a power input two-end time control switch A3 of a second path of time control circuit are respectively connected with two ends of power input of a first electromagnetic valve DC through leads, two

ends

3 and 4 of power output of the second path of time control circuit and two ends of power input of a second electromagnetic valve DC1 are respectively connected with leads.

As shown in fig. 1 and 2, the rest use process and principle of the novel gas burner body 9 are completely consistent with the working principle and use process of the existing natural gas burner for heating flue gas in a flue; during operation, the blower inputs air with a proper proportion into the outer pipe 1 through the air pipe 101, natural gas output by the natural gas pipe enters the outer pipe 1 through the gas pipe 102 of the outer pipe 1, the natural gas and the air are mixed, and then the mixed gas enters the flue from the exhaust pipe 3 at the left end of the outer pipe 1 (the mixed gas enters the exhaust pipe 3 through the outer pipe 1 in the embodiment, and then upwards discharges from nine nozzles 31 on the exhaust pipe 3, an operator presses the power switch of the igniter 2, after the mixed gas discharged from one of the nozzles 31 at the rear part of the upper end of the exhaust pipe 3 is ignited by the front end point flame of the igniter 2, flame further ignites mixed gas upwards discharged from the other eight nozzles 31 on the exhaust pipe 3), and the ignited gas can enter the flue gas heating process after entering the. In the novel structure, due to the cross-shaped heating pipe 3 (exhaust pipe), the length and the width of the exhaust pipe 3 are close to the length and the width in the flue, and the upper end of the exhaust pipe is provided with the nine nozzles 31, flame can be uniformly distributed in the flue at multiple points during combustion, the flame generated by combustion can ensure that flue gas in the flue can be fully heated as far as possible, and adverse effects caused by low temperature of the flue gas are prevented; the heated flue gas is discharged from the upper end of the flue.

In the present application, as shown in fig. 1 and 2, in order to prevent the nozzle 31 from being blocked after a certain time interval, an operator may perform an anti-scaling operation on the nozzle 31 after a certain time interval (for example, 3 days interval). The operation work is carried out just stopping heating flue gas in the flue at combustor body 9 (owing to the high temperature effect that the combustor burning produced at this moment, blast pipe 3 is in higher temperature state, up to several hundred degrees), operating personnel opens the switch S of constant voltage power supply A1, after 220V alternating current power supply got into constant voltage power supply A1 'S1 and 2 feet, constant voltage power supply A1' S3 and 4 feet can output stable 12V direct current power supply and get into the power input both ends of first time control circuit all the way, then, first time control circuit all the way gets electric work. After the time control switch A2 of the first control circuit works by electrifying, under the action of the internal circuit of the time control switch A2 and the power supply output time of the

pins

3 and 4 set by a technician, the

pins

3 and 4 can output 5 seconds of power supply to enter the two ends of the power supply input end of the relay K1, then the relay K1 can be electrified to attract the two control power supply input ends and the two normally open contact ends of the relay K1 to be closed respectively for 5 seconds, because the two control power supply input ends of the relay K1 are respectively connected with the

pins

3 and 4 of the regulated power supply A1, the two normally open contact ends of the relay K1 are respectively connected with the two DC power supply input ends of the electromagnetic valve, therefore, after the time control switch A2 is powered on to work each time, the electromagnetic valve DC can be powered on to work the inner valve core thereof to open for 5 seconds, thus, the external tap water can be sprayed out of the water pipe 32 and the nine small spray pipes 71 on the spray pipe around the upper ends of the nine nozzles 31 within 5 seconds; because the exhaust pipe 3 and the nozzle 31 are in a high temperature state at the moment, and the scaling and the like on the exhaust pipe 3 and the nozzle 31 are also in a high temperature state, after tap water is sprayed on the exhaust pipe 3 and the nozzle 31, the scaling and the like can be cracked due to the action of rapid change of thermal expansion and cold contraction, and fall off from the exhaust pipe 3 and the nozzle 31 as far as possible, so that the probability of blocking the nozzle 31 by scaling and the like is reduced as far as possible; the output of the power supply is stopped after 5 seconds of power supply is output by the pin 3 and the pin 4 of the time control switch A2, so that the input ends of two control power supplies and the two normally closed contact ends of the relay K1 are not closed when power is lost, and the input ends of the two control power supplies and the two normally open contact ends are opened respectively; because two normally closed contact ends of the relay K1 are respectively connected with two power input ends of the time control switch A3, after the time control switch A2 is powered on to work and the power output of 3 and 4 pins is stopped for 5 seconds, the time control switch A3 can be powered on to work, after the time control switch A3 is powered on to work, the time control switch A3 outputs power for 12 seconds under the action of an internal circuit of the time control switch A and the power output time of 3 and 4 pins set by a technician to enter two power input ends of the electromagnetic valve DC1, then the electromagnetic valve DC1 is powered on to work, an internal valve core of the electromagnetic valve is opened for 12 seconds (the electromagnetic valve DC is powered off and the valve core of the electromagnetic valve DC is closed), and therefore, compressed air in an air storage tank of an external air compressor can enter the vent pipe 8 and the outer pipe 1 within 12 seconds, enters the air vent pipe 3 and is sprayed upwards from nine nozzles. Because the air pressure output by the air compressor is very high and the air flow rate is very fast, a small amount of moisture sprayed into the exhaust pipe 3 by the small spray pipe 71 can be sprayed out, and impurities blocked on the plurality of nozzles 31 can be sprayed out upwards and separated from the nozzles, so that the nozzles are prevented from being blocked. After 12 seconds, the output power of the

pins

3 and 4 of the time control switch A3 is stopped, the power-off valve core of the electromagnetic valve DC1 is closed, and the power-off valve core is closed when the next shift flue is heated because the electromagnetic valves DC and DC1 are both powered off (when the next shift flue is heated, the power switch S of the stabilized voltage power supply A1 can be directly closed at first), so that any influence can not be brought to the normal use of the burner body 9. When the descaling operation is required next time, the power switch S of the regulated power supply A1 is turned on again. This is novel owing to have cross heating pipe 3 (blast pipe), and the length and the width of blast pipe 3 are close inside length of flue and width, and 3 upper ends of blast pipe have a plurality of nozzles 31, and flame can multiple spot evenly distributed in the flue in the burning, and the flame that the burning produced can guarantee as far as possible that the flue gas can both obtain the intensive heating in the flue, has prevented the bad consequence that flue gas low temperature produced. This is novel, when closing the use at every turn, the user can carry out automatic water spray scale removal operation as required, under the effect of two way time control circuit 5 etc, utilizes expend with heat and contract with cold to make the adhesion drop as far as possible at the scale deposit of nozzle 31 spout hole side etc to can also fill compressed air after the scale removal and weather residual moisture in blast pipe 3 and the interior impurity of nozzle, guaranteed next time can normally ignite the use. In fig. 2, the relay K is a DC12V type relay.

Having shown and described the fundamental principles and essential features of the invention, and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An anti-scaling combined flue gas heater comprises a natural gas burner body, a voltage-stabilized power supply, a time control circuit, an electromagnetic valve and an air compressor, and is characterized in that an exhaust pipe of the natural gas burner body is polygonal, a plurality of nozzles are arranged at intervals at the upper end of the exhaust pipe, and one end of the exhaust pipe is installed with an outer pipe of the natural gas burner body; the outer pipe is provided with a water pipe, the outer side of the exhaust pipe is provided with a spray pipe with one end of a closed structure, and the other end of the spray pipe is connected with one end of the water pipe; the upper ends of the spraying pipes are spaced by a plurality of spraying pipes; the other end of the water pipe is connected with a tap water pipe through a first electromagnetic valve; the outer pipe is provided with a vent pipe, and the vent pipe is connected with an exhaust pipe of a gas storage tank of the air compressor through a second electromagnetic valve; the natural gas burner body is arranged outside the side end of the flue, and the exhaust pipes are all positioned in the flue; the stabilized voltage supply and the time control circuit are arranged in the element box; the power output two ends of the stabilized voltage power supply and the power input two ends of the first path of time control circuit are respectively electrically connected, the first path of power output two ends of the first path of time control circuit and the power input two ends of the second path of time control circuit are respectively electrically connected, the second path of power output two ends of the first path of time control circuit and the power input two ends of the first electromagnetic valve are respectively electrically connected, and the second path of time control circuit and the power input two ends of the second electromagnetic valve are respectively electrically connected.

2. The combined type flue gas heater of claim 1 wherein the regulated power supply is an ac to dc switching power supply module.

3. The anti-scaling combined type flue gas heater according to claim 1, wherein the first path of time control circuit comprises a microcomputer time control switch and a relay, which are connected through a circuit board, two ends of a power input of the time control switch are respectively connected with two input ends of a control power supply of the relay, and two output ends of the power supply of the time control switch are respectively connected with two input ends of the power supply of the relay.

4. The combined type flue gas heater of claim 1 wherein the second path of time control circuit is a microcomputer time control switch.

5. The combined type smoke heater with the scaling prevention function as claimed in claim 1, wherein the other ends of the exhaust pipe are closed structures, and the height of the upper end of the nozzle of the exhaust pipe is lower than that of the lower part in the outer pipe.

6. The combined type smoke heater of claim 1, wherein the two solenoid valves are normally closed spool solenoid valves.