CN219518202U - Asphalt mixture production waste gas desulfurization system - Google Patents

Abstract

The utility model relates to the technical field of waste gas treatment of asphalt mixing stations, in particular to a waste gas desulfurization system for asphalt mixture production, which comprises; a flue is entered; an induced draft fan; at least two screens; a filter screen exchange assembly; the flue gas quality detection device is used for conveying the flue gas which does not accord with the preset quality after being detected by the flue gas quality detection device back to the position, close to the filter screen, of the flue gas inlet channel; a desulfurizing tower; the desulfurizing tower is used for desulfurizing the flue gas after filtering the filter screen and discharging the flue gas after desulfurizing out of the desulfurizing tower, waste gas generated by asphalt concrete processing is influenced by wind power of a draught fan, enters a flue and spreads towards the direction of a flue gas inlet and a flue gas outlet, the waste gas enters an incineration cavity of the incinerator from a flue gas inlet pipe of the incinerator, the flue gas is detected by a flue gas quality detector, and the flue gas which does not accord with a preset flue gas quality value is pumped to a position, close to the flue gas inlet, of the flue gas inlet for circulating filtration.

Description

Asphalt mixture production waste gas desulfurization system

Technical Field

The utility model relates to the technical field of waste gas treatment of asphalt stirring equipment, in particular to a waste gas desulfurization system for asphalt mixture production.

Background

The asphalt stirring equipment can be called an asphalt mixture stirring station and an asphalt mixture stirring station, is complete equipment for batch production of asphalt mixtures (asphalt concrete), can generate a large amount of smoke in the running process of the equipment, and needs to carry out desulfurization treatment on the smoke generated in the running process of the equipment in order to ensure that the environment-friendly emission reaches the standard;

in the traditional flue gas desulfurization device, a filter screen is arranged to filter and intercept particle impurities in flue gas, and then the flue gas is directly sent into a desulfurization tower for treatment; when the fume emission is great, can accelerate the clearance cycle of filter screen, influence the filter screen and to the filter effect of waste gas, lead to the purifying load of desulfurizing tower overweight, make the desulfurizing tower can't reach the effect of predetermineeing to the purifying effect of waste gas, lead to unable emission standard after the flue gas desulfurization.

Disclosure of Invention

According to the defects, the utility model provides an asphalt mixture production waste gas desulfurization system, which effectively solves the technical problems of the traditional asphalt smoke adsorption device in the background art.

The scheme adopted by the utility model is as follows: the asphalt mixture production waste gas desulfurization system comprises a flue, wherein one end of the flue is provided with a flue inlet, and the other end of the flue is provided with a flue outlet; the induced draft fan is provided with an air inlet end and an air exhaust end connected with the smoke outlet; at least two filter screens having a filtering position for interception in the intake duct and a non-filtering position outside the intake duct; the filter screen exchanging assembly is used for driving the filter screens to enable one filter screen to be positioned at a filtering position and the other filter screen to be positioned at a non-filtering position; the flue gas quality detection device is used for detecting the quality of the flue gas filtered by the filter screen; the feedback flue is arranged between the desulfurizing tower and the air inlet flue and is used for conveying the flue gas which does not accord with the preset quality after being detected by the flue gas quality detection device back to the position, close to the filter screen, of the air inlet flue; the desulfurizing tower is used for desulfurizing the flue gas filtered by the filter screen and discharging the desulfurized flue gas out of the desulfurizing tower.

Preferably, the bottom wall of the flue and two opposite side walls close to the bottom wall are provided with openings which are communicated with each other, and a change space is provided for the filter screen change assembly to drive the filter screen at the non-passing position to change the position of the filter screen at the filtering position.

Preferably, the filter screen exchanging assembly comprises a bracket arranged on the bottom wall of the air inlet flue and a gear motor arranged on the bracket, wherein a connecting frame is fixedly connected to the output end of the gear motor, and at least two filter screens are respectively arranged on the upper side and the lower side of the connecting frame.

Preferably, the flue gas quality detection device is a flue gas quality detector, and the flue gas quality detector is communicated between the filter screen and the desulfurizing tower through a pipeline and is used for detecting the quality of flue gas filtered by the filter screen.

Preferably, an incinerator is arranged between the flue inlet and the desulfurizing tower, an incineration cavity is arranged in the incinerator, and the incineration cavity is provided with a flue inlet end communicated with a flue inlet and a flue outlet end communicated with a flue gas quality detection device.

Preferably, an activated carbon box is arranged between the incinerator and the desulfurizing tower, the inside of the activated carbon box is partitioned into a detection cavity and a purification cavity by a partition plate, a gap is formed between the top end of the partition plate and the top wall of the activated carbon chamber, the purification cavity is communicated with a smoke outlet of the incinerator, activated carbon is arranged in the purification cavity, a smoke quality detector is arranged in the detection cavity, and the detection cavity is communicated with the desulfurizing tower by a pipeline and is provided with an air pump.

Preferably, one end of the feedback flue is communicated with the position, close to the filter screen, of the inlet flue and is provided with a one-way valve, and the other end of the feedback flue is communicated with a detection cavity in the activated carbon box and is provided with a pump.

Preferably, a flue gas purifier is arranged between the flue gas inlet pipeline and the incinerator.

The utility model has the beneficial effects that:

the exhaust gas generated by asphalt concrete processing is influenced by wind power of an induced draft fan and enters a flue, and spreads in the direction of a smoke inlet and a smoke outlet of the flue, after the exhaust gas contacts with a filter screen, particle impurities in the exhaust gas are filtered on the filter screen, the filtered exhaust gas penetrates through the filter screen and continuously spreads in the direction of a smoke purifier, the spread exhaust gas enters the smoke purifier through the smoke inlet end of the smoke purifier, the smoke purifier filters dust in the exhaust gas, the exhaust gas is sprayed out from the smoke outlet end of the smoke purifier and spreads in the direction of an incinerator, the exhaust gas enters an incineration cavity of the incinerator from the smoke inlet pipe of the incinerator, the temperature of the combustible harmful gas is increased to a reaction temperature by utilizing heat generated by auxiliary fuel combustion, the harmful gas in the exhaust gas is subjected to oxidative decomposition, the exhaust gas purified by the incinerator is pumped into a purification cavity in an active carbon box by a wind pump, the active carbon in the purification cavity adsorbs impurities in the exhaust gas, the exhaust gas passes through a gap between the top end of a partition plate and the top wall of an active carbon chamber, and spreads into a detection cavity, the exhaust gas quality detector detects the quality by the smoke quality detector, the exhaust gas accords with a preset quality value, and the exhaust gas enters a preset motor, and then enters a filter screen to a position close to a smoke filtering position, and is positioned at a position close to a smoke filtering position, and is not in a smoke filtering position, and is driven to be in a smoke filtering position, and is in a circulating position, and is in a smoke-exhausting position is in a smoke-and is in a smoke-fume-out position, and a position is driven to be placed to a position and is in a position and a position near a smoke filter position and a position and is rotated.

Drawings

FIG. 1 is a distribution diagram of the present utility model;

FIG. 2 is a schematic diagram of the structure of the present utility model;

FIG. 3 is a schematic view of the structure of the duct and screen exchange assembly of the present utility model;

FIG. 4 is a schematic view of the structure of the filter screen and the connecting frame of the present utility model.

Reference numerals: 10. a flue is entered; 20. an induced draft device; 30. a filter screen; 40. a filter screen exchange assembly; 50. a filtering device; 60. an incinerator; 70. an activated carbon tank; 80. a flue gas quality detection device; 90. a back-transfusion flue; 100. a desulfurizing tower; 110. a discharge flue; 21. an induced draft fan; 41. a bracket; 42. a speed reducing motor; 43. a connecting frame; 51. a flue gas purifier; 81. a smoke quality detector.

Detailed Description

When the emission is large, the desulfurization effect of the waste gas is affected, so that the technical problem that the purification of harmful substances in the waste gas can not reach the preset emission standard is caused;

referring to fig. 1 to 4, an asphalt mixture production waste gas desulfurization system comprises a flue 10, an air inducing device 20, a filter screen 30, a filter screen exchange assembly 40, a filter device 50, an incinerator 60, an activated carbon box 70, a smoke quality detecting device 80, a reinfusion flue 90, a desulfurizing tower 100 and a discharge flue 110, wherein waste gas generated by asphalt concrete production is pumped into the flue 10 through one end of the flue through the air inducing device 20, and the waste gas is spread to the other end of the flue 10;

after the filter screen 30 filters the particulate impurities in the waste gas, the filtering device 50 carries out secondary filtration on the waste gas, so that dust and harmful substances in the waste gas are effectively reduced, the smoke after secondary filtration enters the incineration cavity of the incinerator 60, the temperature of combustible harmful gas is increased to the reaction temperature by utilizing heat generated by the combustion of auxiliary fuel, the harmful gas in the waste gas is subjected to oxidative decomposition, and the incinerated waste gas enters the activated carbon chamber 70:

organic waste gas molecules are adsorbed to the surface of the porous activated carbon to purify and treat waste gas, and the quality of the purified and treated waste gas is detected by a smoke quality detection device 80 in an activated carbon box 70; when the quality of the waste gas reaches a preset value, the waste gas enters the desulfurizing tower for desulfurization treatment, and the treated waste gas is discharged from a discharge flue;

when detecting that the quality of the waste gas does not reach the standard, the waste gas is returned to the position, close to the filter screen 30, in the flue 10 through the return flue 90, the smoke with the quality which does not reach the standard is circularly filtered, the filter screen 30 in use and the filter screen 30 which is not in use are subjected to position exchange by the filter screen exchange assembly 40, and the filtering effect of the filter screen 30 on the smoke is recovered, so that the cleaning period of the filter screen 30 is shortened when the emission is large, the filtering effect of the filter screen 30 on the waste gas is reduced, the purifying load of the desulfurizing tower 100 is finally improved, and the technical problem that the desulfurizing tower 100 possibly cannot reach the preset emission standard after purifying the waste gas is solved.

Referring to fig. 2-3, the flue 10 is provided with a flue inlet and a flue outlet communicated with the filtering device 50, a great amount of smoke generated in the running process of the mixing plant enters the flue 10 through the flue inlet, a fan cover is arranged at the flue inlet of the flue 10 and is arranged above the asphalt mixing plant for improving the flue inlet efficiency;

referring to fig. 2, the induced draft device 20 is an induced draft fan 21 disposed in the smoke inlet duct 10, and the induced draft fan 21 is used for pumping a large amount of smoke generated during the operation of the mixing plant into the smoke inlet duct 10 and spreading the smoke in the smoke inlet duct 10 towards the smoke outlet;

referring to fig. 2, 3 and 4, a filter screen 30 is used to filter impurities in the exhaust gas;

referring to fig. 3 and 4, the filter screen exchanging assembly 40 comprises a bracket 41 arranged on the bottom wall of the flue 10 and a gear motor 42 arranged on the bracket 41, wherein a connecting frame 43 is arranged at the output end of the gear motor 42, the middle part of one side of the connecting frame 43 is fixedly connected with the output end of the gear motor 42, and the filter screen 30 is arranged at two opposite sides of the connecting frame 43;

openings which are communicated are formed in the bottom wall of the flue 10 and the two opposite side walls close to the bottom wall, a exchanging space is provided for the filter screen 30 to be exchanged by rotating the connecting frame 43, sealing layers are arranged on the side edges of the connecting frame 43 corresponding to the openings, and when the filter screen 30 is positioned at the filtering position, the sealing layers shield and seal gaps between the connecting frame 43 and the openings, so that smoke leakage is effectively avoided;

referring to fig. 2, the filter device 50 is a smoke purifier 51, a smoke inlet end of the smoke purifier 51 is communicated with a smoke outlet of the smoke inlet duct 10, a smoke outlet end is communicated with the incinerator 60, and as will be appreciated by those skilled in the art: the flue gas purifier 51 is used for purifying dust in flue gas, and the flue gas purifier 51 is a prior art, so the description thereof will not be repeated here;

referring to fig. 2, the incinerator 60 has an incineration chamber, which communicates with the exhaust end of the flue gas cleaner 51, and increases the temperature of combustible harmful gas to a reaction temperature by using heat generated by combustion of auxiliary fuel, so that the harmful gas in the exhaust gas is oxidatively decomposed;

referring to fig. 2, an activated carbon box 70 is partitioned into a detection cavity and a purification cavity by a partition plate, a pipeline is communicated between the purification cavity and an incineration cavity of an incinerator 60, an air pump for pumping waste gas in the incineration cavity into the purification cavity is arranged on the pipeline, a gap is formed between the top end of a partition plate and the top wall of the activated carbon chamber 70, flue gas after incineration of the incinerator enters the purification cavity through the pipeline, harmful substances in the flue gas are adsorbed by activated carbon arranged in the purification cavity, and flue gas in the purification cavity enters the detection cavity through the gap;

referring to fig. 2, the flue gas quality detecting device 80 is a flue gas quality detector 81, the flue gas quality detector 81 is arranged in a detecting cavity to detect the quality of flue gas entering the purifying cavity, and when the quality of the flue gas reaches a preset value, the flue gas enters the desulfurizing tower 100 through a pipeline;

when the quality of the flue gas does not reach a preset value, the flue gas enters a position, close to the filter screen 30, in the flue 10 through the feedback flue 90 for circulating filtration;

referring to fig. 2, one end of the feedback flue 90 is communicated with the purification cavity and is provided with an electromagnetic valve, the other end of the feedback flue is communicated with the inside of the inlet flue 10 and is provided with a one-way valve, the electromagnetic valve is always in a closed state in a normal state, when the smoke does not accord with a preset smoke quality value, the electromagnetic valve is opened to enable the smoke to enter the inlet flue 10 through the feedback pipe 90, and the smoke in the inlet flue 10 is prevented from entering through the feedback pipe 90 through the one-way valve;

referring to fig. 2, the desulfurizing tower 100 is used for desulfurizing and purifying the flue gas, and the desulfurizing tower 100 is of the prior art, so it will not be described herein;

referring to fig. 2, one end of the exhaust flue 110 is communicated with the smoke outlet end of the desulfurizing tower 100 and is provided with an air pump, and the other end is communicated with a chimney;

working principle: the waste gas generated by asphalt concrete processing is influenced by wind power of a draught fan 21, enters the flue 10 and spreads towards the direction of a smoke outlet of the flue 10, after the waste gas contacts with a filter screen 30, particulate impurities in the waste gas are filtered on the filter screen 30, the filtered waste gas penetrates through the filter screen 30 and continuously spreads towards the direction of a smoke purifier 51, the spread waste gas enters the smoke purifier 51 through a smoke inlet end of the smoke purifier 51, the smoke purifier 51 filters dust in the waste gas, the waste gas is sprayed out from a smoke outlet end of the smoke purifier 51 and spreads towards an incinerator 60, the waste gas enters an incineration cavity of the incinerator 60 from a smoke inlet pipe of the incinerator, the temperature of combustible harmful gas is increased to a reaction temperature by using heat generated by auxiliary fuel combustion, the harmful gas in the waste gas is oxidized and decomposed, the waste gas purified by the incinerator 60 is pumped into a purifying cavity in the activated carbon box 70 by a fan pump, impurities in the waste gas are adsorbed by activated carbon in the purifying cavity, the waste gas is spread into a detecting cavity by a gap between the top end of a partition plate and the top wall of the activated carbon chamber 70, the flue gas is detected by a flue gas quality detector 81, the flue gas meeting the preset flue gas quality value enters the desulfurizing tower 100 for desulfurization treatment and is discharged from the exhaust flue 110 to the outside, and the flue gas not meeting the preset flue gas quality value is pumped to a position, close to a flue inlet, of the flue gas inlet by a pump for circulating filtration, and at the moment, a speed reducing motor 42 drives a connecting frame 43 to rotate so as to replace a filter screen 30 positioned at a filtering position and a filter screen 30 positioned at a non-filtering position in use.

The above description is only for the purpose of illustrating the utility model, and it should be understood that the utility model is not limited to the above embodiments, but various modifications consistent with the idea of the utility model are within the scope of the utility model.

Claims (8)

1. An asphalt mixture production waste gas desulfurization system, comprising:

a smoke inlet is formed in one end of the smoke inlet channel (10), and a smoke outlet is formed in the other end of the smoke inlet channel (10);

the induced draft fan (21), the said induced draft fan (21) has air inlet end and exhaust end connected with outlet flue; at least two screens (30), the screens (30) having a filtering position intercepting within the intake stack (10) and a non-filtering position external to the intake stack (10);

a screen changing assembly (40), wherein the screen changing assembly (40) is used for driving the screens (30) to enable one screen (30) to be in a filtering position and the other screen (30) to be in a non-filtering position;

the flue gas quality detection device (80), the said flue gas quality detection device (80) is used for detecting the flue gas quality after filtering through the filter screen (30);

the reinfusion flue (90) is arranged between the desulfurizing tower (100) and the air inlet flue (10) and is used for conveying the flue gas which does not accord with the preset quality after being detected by the flue gas quality detection device (80) back to the position of the air inlet flue (10) close to the filter screen (30);

the desulfurization tower (100), the desulfurization tower (100) is used for carrying out desulfurization treatment on the flue gas filtered by the filter screen (30) and discharging the flue gas after desulfurization out of the desulfurization tower (100).

2. The desulfurization system for asphalt mixture production waste gas according to claim 1, wherein the bottom wall of the air inlet duct (10) and the opposite side walls close to the bottom wall are provided with openings which are mutually communicated, and a exchanging space is provided for the filter screen exchanging assembly (40) to drive the filter screen (30) at the non-passing position to be exchanged with the filter screen (30) at the filtering position.

3. The asphalt mixture production waste gas desulfurization system according to claim 2, wherein the filter screen exchanging assembly (40) comprises a bracket (41) arranged on the bottom wall of the air inlet flue (10) and a speed reducing motor (42) arranged on the bracket (41), a connecting frame (43) is fixedly connected to the output end of the speed reducing motor (42), and at least two filter screens (30) are respectively arranged on the upper side and the lower side of the connecting frame (43).

4. The asphalt mixture production waste gas desulfurization system according to claim 1, wherein the flue gas quality detection device (80) is a flue gas quality detector (81), and the flue gas quality detector (81) is communicated between the filter screen (30) and the desulfurization tower (100) through a pipeline and is used for detecting the quality of flue gas filtered by the filter screen (30).

5. The desulfurization system for asphalt mixture production waste gas according to claim 4, wherein an incinerator (60) is arranged between the flue inlet (10) and the desulfurization tower (100), an incineration cavity is arranged in the incinerator (60), and the incineration cavity is provided with a flue inlet end communicated with a flue outlet of the flue inlet (10) and a flue outlet end communicated with the flue gas quality detection device (80).

6. The asphalt mixture production waste gas desulfurization system according to claim 5, wherein an activated carbon tank (70) is arranged between the incinerator (60) and the desulfurization tower (100), the inside of the activated carbon tank (70) is partitioned into a detection cavity and a purification cavity by a partition plate, a gap is formed between the top end of the partition plate and the top wall of the activated carbon tank (70), the purification cavity is communicated with a smoke outlet of the incinerator (60) and is internally provided with activated carbon, the smoke quality detector (81) is arranged in the detection cavity, and the detection cavity is communicated with the desulfurization tower (100) by a pipeline and is provided with a wind pump.

7. The desulfurization system for asphalt mixture production waste gas according to claim 6, wherein one end of the back-conveying flue (90) is communicated with a position of the inlet flue (10) close to the filter screen (30) and is provided with a one-way valve, and the other end of the back-conveying flue is communicated with a detection cavity in the activated carbon box (70) and is provided with a pump.

8. The asphalt mixture production waste gas desulfurization system according to claim 7, wherein a flue gas purifier (51) is provided between said inlet flue (10) and said incinerator (60).