CN212548973U

CN212548973U - Flue gas desulfurization purifier for thermal power plant

Info

Publication number: CN212548973U
Application number: CN202021491002.2U
Authority: CN
Inventors: 林建雄; 李秋婷; 魏晋宏; 李海涛
Original assignee: Shanxi Sanhesheng Intelligent Technology Co ltd
Current assignee: Shanxi Sanhesheng Intelligent Technology Co ltd
Priority date: 2020-07-26
Filing date: 2020-07-26
Publication date: 2021-02-19
Anticipated expiration: 2030-07-26

Abstract

The utility model discloses a flue gas desulfurization purifier for thermal power plant relates to the relevant technical field of exhaust-gas treatment, it is more single to have solved heat exchanger function when current flue gas desulfurization purifier uses, can lead to the unable work of whole device when heat exchanger inner tube blocks up or reveals, the sack cleaner is inconvenient to be installed and change the filter bag, wastes time and energy when the filter bag is long-term to be used and needs to clean or change, the stifled grey problem that equipment appears easily, including waste heat exchanger, the sack cleaner, electrostatic precipitator, the SCR reactor, the optomagnetic resonator, the desulfurizing tower, fan and chimney, waste heat exchanger's exhaust end and the inlet end intercommunication of sack cleaner. The utility model discloses loop through twice dust removal of sack dust removal and electrostatic precipitator, greatly reduced the concentration of impurity in the flue gas, solved the stifled grey problem of follow-up equipment and alleviateed heavy metal ion's harm, improved the purifying effect of device.

Description

Flue gas desulfurization purifier for thermal power plant

Technical Field

The utility model relates to a relevant technical field of exhaust-gas treatment, in particular to flue gas desulfurization purifier for firepower plant.

Background

In recent years, with the increasing strictness of environmental protection regulations and the gradual rise of fuel price, energy conservation and environmental protection are widely regarded, higher requirements are put forward for the standard emission of high-temperature flue gas of a thermal power plant and energy conservation and consumption reduction in flue gas treatment, particularly, the emission of NOx in the flue gas draws great attention of society, and the flue gas needs to be subjected to denitration treatment in addition to traditional dedusting and desulfurization treatment to ensure that SO is ensured₂And NOx homoenergetic discharges up to standard, current flue gas desulfurization purifier, heat exchanger function is more single, can lead to the unable work of whole device when heat exchanger inner tube blocks up or reveals, and the sack cleaner is inconvenient to be installed and change the filter bag, wastes time and energy when the filter bag is used for a long time and needs cleanness or change.

In chinese utility model patent application no: CN201110319129.5 discloses a flue gas dedusting, denitration and desulfurization method for a thermal power plant, wherein high-temperature raw flue gas is dedusted by a bag-type deduster and then introduced into an SCR reactor for selective catalytic reduction denitration, then is cooled to 90-100 ℃ sequentially by an air preheater and a heat exchanger, and then is fed into a desulfurization tower for wet desulfurization, and the desulfurized flue gas discharged from the desulfurization tower is heated to 100-105 ℃ by the heat exchanger and then is discharged from a chimney. The reaction rate of the device is influenced by the ash blockage problem easily occurring in the equipment in the flue gas dedusting, denitration and desulfurization method of the thermal power plant, so that the purification effect of the device is reduced.

Therefore, it is necessary to provide a flue gas desulfurization purification device for thermal power plants to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a flue gas desulfurization purifier for thermal power plant has solved that current flue gas desulfurization purifier is more single when using the heat exchanger function, can lead to the unable work of whole device when heat exchanger inner tube blocks up or reveals, and the sack cleaner is inconvenient to be installed and change the filter bag, wastes time and energy when the filter bag is used for a long time and needs cleanness or change, the stifled grey problem that equipment appears easily, the problem of the reaction rate of influence device.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

a flue gas desulfurization purification device for a thermal power plant comprises a waste heat exchanger, a bag-type dust collector, an electrostatic dust collector, an SCR (selective catalytic reduction) reactor, a magneto-optical resonator, a desulfurization tower, a fan and a chimney, wherein the exhaust end of the waste heat exchanger is communicated with the air inlet end of the bag-type dust collector, the exhaust end of the bag-type dust collector is communicated with the air inlet end of the electrostatic dust collector, the exhaust end of the electrostatic dust collector is communicated with the air inlet end of the SCR reactor, the exhaust end of the SCR reactor is communicated with the air inlet end of the magneto-optical resonator, the exhaust end of the magneto-optical resonator is communicated with the air inlet end of the desulfurization tower, the exhaust end of the desulfurization tower is communicated with the air inlet end of the fan, and the exhaust end of the fan is communicated with the air;

a gas inlet is formed in one end of the waste heat exchanger, a gas outlet is formed in the other side of the waste heat exchanger, and heat exchange tubes are arranged at the upper end and the lower end of the interior of the waste heat exchanger;

an air inlet is formed in one side of the bag-type dust collector, a side door is arranged on the other side of the bag-type dust collector, an air outlet is formed in the top end of the bag-type dust collector, a support column is fixedly connected to the middle of the bottom end of the bag-type dust collector, a fixed disc is fixed to the top end of the support column, an air cylinder is fixedly connected to the middle of the top end of the fixed disc, a push plate is fixedly connected to a piston rod of the air cylinder, a servo motor is fixedly connected to one side of the top end of the fixed disc, a gear is fixedly connected to an output shaft of the servo motor, an installation disc is arranged on the outer side of the fixed disc, an inner slide way is formed in the lower end of the inner side of the installation disc, the installation disc is movably connected with the fixed disc through, the push groove is formed in one end of the through hole and matched with the push plate, and a filter bag is arranged in the slide groove.

Optionally, the number of the heat exchange tubes is multiple, the heat exchange tubes are linearly arranged, and electromagnetic valves are arranged inside the heat exchange tubes.

Optionally, the both ends outside of hot exchange pipe all links firmly and has connect the installation knot, the installation is detained and is become by two hemizonids, and the one end of two hemizonids is articulated, and the other end of two hemizonids passes through the hasp to be connected, and the outside of one of them hemizonids and waste heat exchanger's inner wall fixed connection.

Optionally, one end of the heat exchange tube is connected with a liquid inlet tube, and the other end of the heat exchange tube is connected with a liquid outlet tube.

Optionally, the size of the side door is larger than that of the filter bag, and the side door is connected with the bag-type dust collector in a sealing manner.

Optionally, the through holes are distributed in an annular array, the diameter of each through hole is the same as that of filter cloth at the lower end of the filter bag, and the diameter of the sliding groove is the same as that of a fixing ring at the top end of the filter bag.

Optionally, the filter cloth of the filter bag is a mixed fiber felt formed by cross-laying of a PBO fiber net and a basalt fiber net.

A method for desulfurizing and purifying flue gas for a thermal power plant comprises the following steps:

a: and (3) heat recovery: introducing sulfur-containing flue gas generated by a boiler in a thermal power plant at a temperature of more than 350 ℃ into a waste heat exchanger, and cooling the sulfur-containing flue gas to reduce the temperature of the sulfur-containing flue gas by 70-90 ℃;

b: primary dust removal: introducing sulfur-containing flue gas with the temperature of 70-90 ℃ into a bag-type dust collector, and removing dust by the bag-type dust collector, wherein the sulfur-containing flue gas passes through a filter bag and is subjected to primary dust removal by the filter bag;

c: secondary dust removal: after dust removal is carried out by a bag-type dust remover, introducing sulfur-containing flue gas into an electrostatic dust remover, carrying out dust removal by the electrostatic dust remover, ionizing the flue gas by utilizing a high-voltage electric field, and separating dust charges in the air flow from the air flow under the action of the electric field to carry out secondary dust removal;

d: and (3) denitration reaction: putting the sulfur-containing flue gas subjected to twice filtration into an SCR reactor, and performing selective catalytic reduction denitration;

e: optical magnetic resonance: introducing the denitrated sulfur-containing flue gas into a photomagnetic resonator, wherein sulfur dioxide molecules in the flue gas undergo energy level transition after being irradiated by laser under the condition of photomagnetic resonance, so that S and O in part of the sulfur dioxide molecules are dissociated and decomposed into oxygen and elemental sulfur;

f: and (3) wet desulphurization: the sulfur-containing flue gas is subjected to photomagnetic resonance and then is introduced into a desulfurizing tower, the flue gas and sodium hydroxide absorption liquid in the desulfurizing tower are subjected to gas-liquid two-phase contact absorption neutralization reaction, the sulfur-containing flue gas is purified, then is dewatered and demisted by a demisting plate, is pumped into a chimney by a fan and is discharged into the atmosphere from the chimney.

The utility model provides a flue gas desulfurization purifier for thermal power plant and method thereof possesses following beneficial effect:

1. the utility model discloses utilize and carry out heat recovery to the flue gas with hot exchange pipe more, under the combined action with hot exchange pipe more, not only can control the temperature and the velocity of flow of the inside coolant liquid of heat exchange pipe on the one hand, can also selectively open hot exchange pipe's quantity, be convenient for control heat recovery's speed, and then conveniently master the discharge temperature of flue gas, on the other hand is owing to can selectively open with hot exchange pipe more, has solved the problem that the pipeline blockked up or lead to the unable work of whole device when revealing.

2. The utility model discloses a set up the sack cleaner to and the cooperation setting between side door, support column, fixed disk, cylinder, push pedal, servo motor, gear, mounting disc, through-hole, spout, promotion groove, ring gear and the inner slide, conveniently install and change the filter bag, when the filter bag uses needs to clean or change for a long time, labour saving and time saving more has reduced the work degree of difficulty, has improved work efficiency.

3. The utility model discloses a flue gas purification method loops through twice dust removal of sack dust removal and electrostatic precipitator, greatly reduced the concentration of impurity in the flue gas, solved the stifled grey problem of follow-up equipment and alleviateed heavy metal ion's harm, reduced the concentration of harmful substance in the flue gas, and then reduced the purification pressure of follow-up equipment, directly accelerated the reaction rate of SCR reactor, optomagnetic resonator and desulfurizing tower, improved the purifying effect of device.

4. The utility model discloses utilize optical magnetic resonance's mode, can dissociate the sulfur dioxide molecule in the flue gas, decompose into oxygen and simple substance sulphur, and then reduce sulphur content, promoted entire system's throughput.

5. The utility model discloses not only equipment area is less to the treatment effect is good, and the operation maintenance cost is very low, is favorable to popularizing and applying on a large scale.

Drawings

FIG. 1 is a schematic view of a desulfurization purification apparatus of the present invention;

FIG. 2 is a schematic cross-sectional view of the waste heat exchanger of the present invention;

FIG. 3 is a schematic cross-sectional view of the bag-type dust collector of the present invention;

fig. 4 is a schematic top view of the mounting plate structure of the present invention;

fig. 5 is a schematic top sectional view of the mounting plate structure of the present invention.

In the figure: 1-waste heat exchanger, 11-gas inlet, 12-gas outlet, 13-heat exchange tube, 14-mounting buckle, 2-bag dust remover, 21-gas inlet, 22-gas outlet, 23-side door, 24-support column, 25-fixed disk, 26-cylinder, 27-push plate, 28-servo motor, 29-gear, 3-electrostatic dust remover, 4-SCR reactor, 5-photomagnetic resonator, 6-desulfurizing tower, 7-blower, 8-chimney, 9-mounting disk, 91-through hole, 92-chute, 93-pushing groove, 94-filter bag, 95-gear ring and 96-inner slideway.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "disposed," "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; may be a mechanical connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The utility model provides a technical scheme: the device comprises a waste heat exchanger 1, a bag-type dust collector 2, an electrostatic dust collector 3, an SCR (selective catalytic reduction) reactor 4, a magneto-optical resonator 5, a desulfurizing tower 6, a fan 7 and a chimney 8, wherein the exhaust end of the waste heat exchanger 1 is communicated with the air inlet end of the bag-type dust collector 2, the exhaust end of the bag-type dust collector 2 is communicated with the air inlet end of the electrostatic dust collector 3, the exhaust end of the electrostatic dust collector 3 is communicated with the air inlet end of the SCR reactor 4, the exhaust end of the SCR reactor 4 is communicated with the air inlet end of the magneto-optical resonator 5, the exhaust end of the magneto-optical resonator 5 is communicated with the air inlet end of the desulfurizing tower 6, the exhaust end of the desulfurizing tower 6 is communicated with the air inlet end of the fan 7, and the exhaust;

one end of the waste heat exchanger 1 is provided with a gas inlet 11, the other side of the waste heat exchanger 1 is provided with a gas outlet 12, the upper end and the lower end of the interior of the waste heat exchanger 1 are respectively provided with a plurality of heat exchange tubes 13, the heat exchange tubes 13 are linearly arranged, electromagnetic valves are arranged inside the heat exchange tubes 13, the outer sides of the two ends of each heat exchange tube 13 are fixedly connected with a mounting buckle 14, each mounting buckle 14 consists of two half-ring bodies, one ends of the two half-ring bodies are hinged, the other ends of the two half-ring bodies are connected through a buckle, the outer side of one half-ring body is fixedly connected with the inner wall of the waste heat exchanger 1, one end of each heat exchange tube 13 is connected with a liquid inlet tube, the other end of each heat exchange tube 13 is connected with a liquid outlet tube, the multi-heeled heat exchange tubes 13, the quantity of the heat exchange tubes 13 can be selectively opened, so that the heat recovery rate can be conveniently controlled, the discharge temperature of the flue gas can be conveniently mastered, and on the other hand, the problem that the whole device cannot work due to pipeline blockage or leakage is solved because the heat exchange tubes 13 can be selectively opened;

an air inlet 21 is arranged on one side of the bag-type dust collector 2, a side door 23 is arranged on the other side of the bag-type dust collector 2, an exhaust port 22 is arranged on the top end of the bag-type dust collector 2, a support column 24 is fixedly connected to the middle of the bottom end of the bag-type dust collector 2, a fixed disk 25 is fixedly connected to the top end of the support column 24, an air cylinder 26 is fixedly connected to the middle of the top end of the fixed disk 25, a push plate 27 is fixedly connected to a piston rod of the air cylinder 26, a servo motor 28 is fixedly connected to one side of the top end of the fixed disk 25, a gear 29 is fixedly connected to an output shaft of the servo motor 28, a mounting disk 9 is arranged on the outer side of the fixed disk 25, an inner slide way 96 is arranged at the lower end of the inner side of the mounting disk 9, the mounting disk 9 is, the one end of through-hole 91 has been seted up and has been promoted groove 93, promote groove 93 and push pedal 27 looks adaptation, be equipped with filter bag 94 in the spout 92, the mixed fibrofelt that the filter cloth of filter bag 94 was alternately spread by PBO fibre web and basalt fibre web, the size of side door 23 is greater than the size of filter bag 94, side door 23 and sack cleaner 2 sealing connection, through-hole 91 has a plurality ofly, a plurality of through-holes 91 are annular array and distribute, the diameter of through-hole 91 is the same with the diameter of filter bag 94 lower extreme filter cloth, the diameter of spout 92 is the same with the diameter of filter bag 94 top retainer plate.

When the filter bag 94 in the bag-type dust collector 2 needs to be replaced, the side door 23 is opened, the servo motor 28 is started, the servo motor 28 drives the electric mounting disk 9 to rotate through the gear 29 and the toothed ring 95, the mounting disk 9 rotates along the fixed disk 25 through the inner slide 96, the filter bag 94 needing to be replaced rotates to correspond to the side door 23, the push groove 93 corresponds to the push plate 27 at the moment, the servo motor 28 is stopped, the air cylinder 26 is started to drive the push plate 27 to move, the push plate 27 extends into the push groove 93 to push the filter bag 94 out of the through hole 91 and the sliding groove 92, the filter bag 94 is taken down through the opening of the side door 23, a new filter bag 94 is filled into the through hole 91 and the sliding groove 92, the side door 23 is closed, the filter bag 94 is replaced, and the bag-type dust collector 2, the side door 23, the support column 24, the fixed disk 25, the air cylinder, The cooperation setting between gear 29, mounting disc 9, through-hole 91, spout 92, promotion groove 93, ring gear 95 and the inner slide 96 is conveniently installed and is changed filter bag 94, uses for a long time at filter bag 94 and when needing clean or change, labour saving and time saving more has reduced the work degree of difficulty, has improved work efficiency.

According to as shown in fig. 1-5, the utility model provides a technical scheme:

a: and (3) heat recovery: introducing sulfur-containing flue gas generated by a boiler in a thermal power plant at a temperature of more than 350 ℃ into a waste heat exchanger, and cooling the sulfur-containing flue gas to reduce the temperature of the sulfur-containing flue gas by 80 ℃;

b: primary dust removal: introducing sulfur-containing flue gas with the temperature of 80 ℃ into a bag-type dust collector, and removing dust by the bag-type dust collector, wherein the sulfur-containing flue gas passes through a filter bag and is subjected to primary dust removal by the filter bag;

In summary, the following steps: this method that flue gas desulfurization purifies for thermal power plant, loop through twice dust removal of sack dust removal and electrostatic precipitator, greatly reduced the concentration of impurity in the flue gas, the stifled grey problem of follow-up equipment has been solved and the harm of heavy metal ion has been alleviateed, reduce the concentration of harmful substance in the flue gas, and then reduced the purification pressure of follow-up equipment, SCR reactor 4 has directly been accelerated, the reaction rate of optomagnetic resonator 5 and desulfurizing tower 6, the purifying effect of device has been improved, utilize the mode of optomagnetic resonance, can dissociate the sulfur dioxide molecule in the flue gas, decompose into oxygen and simple substance sulphur, and then reduce sulphur content, the throughput of entire system has been promoted, the utility model discloses not only equipment area is less, and the treatment effect is good, the operation maintenance cost is very low, be favorable to popularizing and applying on a large scale.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a flue gas desulfurization purifier for thermal power plant, includes waste heat exchanger (1), sack cleaner (2), electrostatic precipitator (3), SCR reactor (4), optomagnetic resonator (5), desulfurizing tower (6), fan (7) and chimney (8), its characterized in that: the exhaust end of the waste heat exchanger (1) is communicated with the air inlet end of a bag-type dust collector (2), the exhaust end of the bag-type dust collector (2) is communicated with the air inlet end of an electrostatic dust collector (3), the exhaust end of the electrostatic dust collector (3) is communicated with the air inlet end of an SCR reactor (4), the exhaust end of the SCR reactor (4) is communicated with the air inlet end of a magneto-optical resonator (5), the exhaust end of the magneto-optical resonator (5) is communicated with the air inlet end of a desulfurizing tower (6), the exhaust end of the desulfurizing tower (6) is communicated with the air inlet end of a fan (7), and the exhaust end of the fan (7) is communicated with the air inlet end of a chimney (8);

a gas inlet (11) is formed in one end of the waste heat exchanger (1), a gas outlet (12) is formed in the other side of the waste heat exchanger (1), and heat exchange tubes (13) are arranged at the upper end and the lower end of the interior of the waste heat exchanger (1);

one side of the bag-type dust collector (2) is provided with an air inlet (21), the other side of the bag-type dust collector (2) is provided with a side door (23), the top end of the bag-type dust collector (2) is provided with an air outlet (22), the bottom middle part of the bag-type dust collector (2) is fixedly connected with a support column (24), the top end of the support column (24) is fixed with a fixed disc (25), the top middle part of the fixed disc (25) is fixedly connected with an air cylinder (26), a piston rod of the air cylinder (26) is fixedly connected with a push plate (27), one side of the top end of the fixed disc (25) is fixedly connected with a servo motor (28), a gear (29) is fixedly connected onto an output shaft of the servo motor (28), the outer side of the fixed disc (25) is provided with a mounting disc (9), the inner slide way (96) is arranged at the lower end, the inner side upper end of the mounting disc (9) is fixedly connected with a toothed ring (95), the toothed ring (95) is meshed with a gear (29) and connected with the gear, through holes (91) are formed in the circumferential direction of the mounting disc (9), sliding grooves (92) are formed in the two sides of the through holes (91), a pushing groove (93) is formed in one end of each through hole (91), the pushing groove (93) is matched with the push plate (27), and a filter bag (94) is arranged in each sliding groove (92).

2. The flue gas desulfurization purification device for the thermal power plant according to claim 1, characterized in that:

the heat exchange tubes (13) are arranged in a plurality, the heat exchange tubes (13) are arranged in a linear mode, and electromagnetic valves are arranged inside the heat exchange tubes (13).

3. The flue gas desulfurization purification device for the thermal power plant according to claim 1, characterized in that:

the both ends outside of hot exchange pipe (13) all links firmly and connects installation knot (14), installation knot (14) comprise two hemizonids, and the one end of two hemizonids is articulated, and the other end of two hemizonids passes through the hasp to be connected, the outside of one of them hemizonids and the inner wall fixed connection of waste heat exchanger (1).

4. The flue gas desulfurization purification device for the thermal power plant according to claim 1, characterized in that:

one end of the heat exchange pipe (13) is connected with a liquid inlet pipe, and the other end of the heat exchange pipe (13) is connected with a liquid outlet pipe.

5. The flue gas desulfurization purification device for the thermal power plant according to claim 1, characterized in that:

the size of the side door (23) is larger than that of the filter bag (94), and the side door (23) is connected with the bag-type dust collector (2) in a sealing mode.

6. The flue gas desulfurization purification device for the thermal power plant according to claim 1, characterized in that:

the filter bag is characterized in that the through holes (91) are distributed in an annular array mode, the diameter of each through hole (91) is the same as that of filter cloth at the lower end of the filter bag (94), and the diameter of the sliding groove (92) is the same as that of a fixing ring at the top end of the filter bag (94).

7. The flue gas desulfurization purification device for the thermal power plant according to claim 1, characterized in that:

the filter cloth of the filter bag (94) is a mixed fiber felt formed by cross laying of PBO fiber nets and basalt fiber nets.