CN216409793U

CN216409793U - Flue gas desulfurization dust collector of steel rolling heating furnace

Info

Publication number: CN216409793U
Application number: CN202122080376.6U
Authority: CN
Inventors: 蔡由新; 杨立航
Original assignee: Yunnan Qu Jing Cheng Gang Iron And Steel Group Co ltd
Current assignee: Yunnan Qu Jing Cheng Gang Iron And Steel Group Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-04-29
Anticipated expiration: 2031-08-31

Abstract

The utility model discloses a flue gas desulfurization and dust removal device of a steel rolling heating furnace, which comprises a heating furnace flue, a desulfurization tower, a desulfurizer storage tank and a bag-type dust remover, wherein a cyclone dust collector and a flue gas heater are sequentially arranged on a smoke exhaust pipe between the heating furnace flue and the desulfurization tower; the desulfurizing tower includes tower body, second air inlet, second gas outlet and row's ash mouth, has set gradually desulfurization spraying subassembly, gas distribution subassembly and gas adsorption subassembly from the bottom up in the tower body between second air inlet and second gas outlet. This device not only can heat up the flue gas, lets the desulfurated flue gas temperature even, and the desulfurated is effectual moreover, and desulfurization efficiency is high.

Description

Flue gas desulfurization dust collector of steel rolling heating furnace

Technical Field

The utility model belongs to the technical field of tail gas purification, and particularly relates to a flue gas desulfurization and dust removal device of a steel rolling heating furnace.

Background

The steel rolling heating furnace is an industrial kiln and mainly used for heating steel billets by heat generated by fuel combustion, and the steel rolling heating furnace generates dust and SO in the combustion process₂And harmful substances such as NOx cause environmental pollution. With the increasing environmental emission standard and the increasing pollution treatment of the country, the working schemes (solicited comments) for ultra-low emission modification of iron and steel enterprises issued by the ministry of ecological environment (environmental atmosphere content [2018 ]]No. 242) makes the following strict regulations on the smoke emission of the heavy spot area steel rolling heating furnace: under the condition that the reference oxygen content is 8 percent, the emission concentration of the particulate matters is less than or equal to 10mg/m³The sulfur dioxide emission concentration is less than or equal to 50mg/m³The concentration of nitrogen oxide emission is less than or equal to 150mg/m³. At present, the desulfurization and dust removal technology adopted by companies mainly comprises a desulfurization tower and a bag-type dust remover, but because the injection system of a Venturi tube structure adopted by the desulfurization tower has the following defects in the using process: firstly, after the flue gas enters the desulfurizing tower from the Venturi injection system, the contact time of the flue gas and a desulfurizing agent is short, the contact area is small, the desulfurizing efficiency is low, and the desulfurizing effect is not ideal; and secondly, because the exhaust temperature of the smoke and waste gas discharged by the steel rolling heating furnace is generally about 80 ℃, the smoke and waste gas can not meet the requirement of the smoke and waste gas temperature after entering the desulfurizing tower, and can not fully react with the desulfurizing agent. Therefore, the device aims to provide the flue gas desulfurization and dust removal device of the steel rolling heating furnace, which has the advantages of novel structure, low cost, good desulfurization effect and high desulfurization efficiency.

Disclosure of Invention

The utility model aims to provide the flue gas desulfurization and dust removal device of the steel rolling heating furnace, which has the advantages of novel structure, low cost, good desulfurization effect and high desulfurization efficiency.

The utility model aims to realize the purpose, which comprises a heating furnace flue, a desulfurizing tower, a desulfurizing agent storage tank and a bag-type dust collector, wherein a cyclone dust collector and a flue gas heater are sequentially arranged on a smoke exhaust pipe between the heating furnace flue and the desulfurizing tower, the flue gas heater comprises an outer box body, an inner box body, a first air inlet and a first air outlet, a closed heating cavity is formed between the outer box body and the inner box body, a spiral heating pipe is arranged in the heating cavity, one end of the spiral heating pipe is provided with a heat medium inlet, the other end of the spiral heating pipe is provided with a heat medium outlet, a heat conducting ball is filled in the heating cavity around the spiral heating pipe, and a gas guide component is arranged in the inner box body; the desulfurizing tower includes tower body, second air inlet, second gas outlet and row's ash mouth, has set gradually desulfurization spraying subassembly, gas distribution subassembly and gas adsorption subassembly from the bottom up in the tower body between second air inlet and second gas outlet.

Desulfurization spraying subassembly includes the desulfurizer conveyer pipe, rotates sleeve pipe and rice word support frame, and rice word support frame is installed in the tower body, rotates the sleeve pipe and rotates the center department of installing at rice word support frame, and it is sealed that end plate is passed through to rotation sheathed tube upper end and lower extreme, and the one end of desulfurizer conveyer pipe links to each other with the desulfurizer storage tank, and the other end inserts and rotates the sleeve pipe in and rotate with rotating the sleeve pipe to be connected, and the circumference equipartition in the lower part of rotating the sheathed tube is provided with many spray tubes, the equidistant a plurality of nozzles of installing in bottom of spray tube installs the rotatory actuating mechanism of drive rotation sleeve pipe on the rice word support frame. The driving mechanism comprises a driving motor, a driving gear and a gear ring, the gear ring is installed on the rotating sleeve, a shell is installed on the support frame shaped like a Chinese character 'mi', the driving motor is installed in the shell, the driving gear is installed on an output shaft of the driving motor, and the driving gear is meshed with the gear ring.

The gas distribution subassembly includes filter screen and buckled plate, and the filter screen is installed on the tower body, and the buckled plate is installed on the filter screen, is provided with a plurality of bleeder vents on the buckled plate.

The gas adsorption component comprises an upper fixing plate and a lower fixing plate which are arranged in the tower body at intervals, a plurality of gas cylinders are uniformly arranged between the upper fixing plate and the lower fixing plate, a lower pore plate is arranged at the bottom of each gas cylinder, an upper pore plate is movably arranged at the top of each gas cylinder, and adsorbents are filled in the gas cylinders.

The gas diversion assembly at least comprises 2 horizontal partition plates which are horizontally staggered from top to bottom, a gap is reserved between the end part of each horizontal partition plate and the inner box body, a plurality of first baffle plates are arranged on the upper surface and the lower surface of each horizontal partition plate at intervals, the first baffle plates and the horizontal partition plates are obliquely arranged, and the first baffle plates on the two adjacent horizontal partition plates are staggered from each other. The top in the inner box body and the bottom incline upward and are provided with a plurality of second baffle plates at intervals, and the second baffle plates and the adjacent first baffle plates are arranged in an intersecting manner.

The inner wall of the outer box body is provided with a heat preservation layer.

Compared with the prior art, the device has the advantages that: firstly, the cyclone dust collector and the flue gas heater are creatively arranged at the air inlet end of the desulfurizing tower, the cyclone dust collector can preliminarily remove large-particle impurities mixed in flue gas, the flue gas heater can uniformly heat the flue gas discharged by the heating furnace, and the temperature of the flue gas entering the desulfurizing tower can reach about 170 ℃ so as to meet the requirement of the flue gas desulfurization temperature; secondly, the structure of the desulfurizing tower is optimized, when in desulfurization, the flue gas flows upwards, and the desulfurizing agent is sprayed out from top to bottom by utilizing the desulfurizing spraying component, therefore, the flue gas can be fully contacted with the desulfurizer under the condition of rotational flow, and the desulfurizer is sprayed out by utilizing the desulfurization spraying component, so that the contact time is long, the contact area is large, the condition of four corners of desulfurization is avoided, the desulfurization effect is improved, simultaneously after the spray desulfurization, the flue gas is through the evenly distributed back of air distribution subassembly, and the air distribution subassembly can reduce the flow velocity of flue gas to a certain extent, has guaranteed desulfurated sufficiency and quality, and later the flue gas continues after upwards flowing enters into gas adsorption component, and gas adsorption component can carry out the secondary to the flue gas once more and adsorb desulfurization processing, and gas adsorption component lets the desulfurization effect of flue gas more thoroughly under the condition that can improve desulfurated efficiency. This device not only can heat up the flue gas, lets the desulfurated flue gas temperature even, and desulfurated effectual moreover, desulfurization efficiency is high, and its desulfurization efficiency can reach more than 90%, and dust collection efficiency 98%, have novel structure, advantage that the running cost is low, easily uses widely.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of a desulfurizing tower 2;

FIG. 3 is a schematic diagram of the flue gas heater 6;

in the figure: in the figure, 1-a heating furnace flue, 2-a desulfurizing tower, 21-a tower body, 22-a second air inlet, 23-a second air outlet, 24-an ash discharge port, 25-a desulfurizing agent conveying pipe, 26-a rotating sleeve, 27-a Chinese character 'mi' shaped supporting frame, 28-a spraying pipe, 29-a nozzle, 210-a driving motor, 211-a driving gear, 212-a gear ring, 213-a filtering net, 214-a corrugated plate, 215-an upper fixing plate, 216-a lower fixing plate, 217-a gas guide cylinder, 218-an adsorbent, 3-a desulfurizing agent storage tank, 4-a bag dust collector, 5-a cyclone dust collector, 6-a flue gas heater, 61-an outer box body, 62-an inner box body, 63-a first air inlet, 64-a first air outlet and 65-a spiral heating pipe, 66-heat conducting balls, 67-horizontal partition plates, 68-first baffle plates, 69-second baffle plates, 610-heat insulating layers and 7-smoke exhaust pipes.

Detailed Description

The utility model is further described with reference to the accompanying drawings, but the utility model is not limited in any way, and any variations or modifications based on the teachings of the utility model are within the scope of the utility model.

As shown in fig. 1 to 3, the utility model comprises a heating furnace flue 1, a desulfurizing tower 2, a desulfurizing agent storage tank 3 and a bag-type dust collector 4, lime slurry is arranged in the desulfurizing agent storage tank 3, the bag-type dust collector 4 adopts a pulse bag-type dust collector used in the prior art, a cyclone dust collector 5 and a flue gas heater 6 are sequentially arranged on a smoke exhaust pipe 5 between the heating furnace flue 1 and the desulfurizing tower 2, the cyclone dust collector 5 can primarily remove large-particle impurities mixed in flue gas, the flue gas heater 6 can uniformly heat the flue gas exhausted by a heating furnace, the flue gas heater 6 comprises an outer box body 61, an inner box body 62, a first air inlet 63 and a first air outlet 64, a closed heating cavity is formed between the outer box body 61 and the inner box body 62, a spiral heating pipe 65 is arranged in the heating cavity, and one end of the spiral heating pipe 65 is provided with a heat medium inlet, the other end of the spiral heating pipe is provided with a heat medium outlet, the heating medium adopted by the spiral heating pipe 65 is water vapor, coal gas and other media, the device preferably adopts water vapor which is generated in the steel rolling process, the utilization of the waste heat of the steam can effectively control the operation cost, a heating cavity around the spiral heating pipe 65 is filled with a heat conducting ball 66, the heat conducting ball 66 is a sphere made of magnesium oxide powder and with the diameter of 3-6 mm, and a gas guide component is arranged inside the inner box body 62; desulfurizing tower 2 includes tower body 21, second air inlet 22, second gas outlet 23 and ash discharge port 24, has set gradually desulfurization spraying subassembly, gas distribution subassembly and gas adsorption subassembly from the bottom up in tower body 21 between second air inlet 22 and second gas outlet 23.

The working process of the device is as follows: the flue gas discharged from the flue 1 of the heating furnace enters the cyclone dust collector 5 through the smoke discharge pipe 7, the cyclone dust collector 5 can primarily remove large-particle impurities mixed in the flue gas, then the flue gas enters the inner box 62 of the flue gas heater 6, then a heating medium is introduced into the spiral heating pipe 65, at the moment, heat generated by the spiral heating pipe 65 is diffused towards the surface of the inner box 62 through the heat conducting ball 66 and then is transmitted to the flue gas circulating in the inner box 62 to achieve the heating purpose, the temperature of the flue gas discharged through the first gas outlet 64 can reach about 170 ℃, at the moment, the flue gas enters the desulfurizing tower 2 from the second gas inlet 22, the flue gas flows upwards, and the desulfurizing agent is sprayed out from top to bottom by utilizing a desulfurizing spray component, so that the flue gas and the desulfurizing agent can be fully contacted under the condition of rotational flow, and the desulfurizing agent is sprayed out by utilizing the desulfurizing spray component, not only the time of contact is long, and the area of contact is big, the condition in desulfurization four corners does not exist, be favorable to improving desulfurization effect, simultaneously after the spray desulfurization, the flue gas is behind the evenly distributed of air distribution subassembly, the air distribution subassembly can reduce the flow velocity of flue gas to a certain extent, desulfurization sufficiency and quality have been guaranteed, after the flue gas continues upwards to flow and enters into behind the gas adsorption component, the gas adsorption component can carry out the secondary to the flue gas once more and adsorb desulfurization processing, the gas adsorption component is under the condition that can improve desulfurization efficiency, let the desulfurization effect of flue gas more thoroughly. After the device is used, the emission concentration of the flue gas particulate matter is less than 10mg/Nm and SO is planted in the fruit trees₂The discharge concentration is less than 50mg/Nm, the total desulfurization efficiency can reach more than 90 percent, the dust removal efficiency is 98 percent, no wastewater is generated in the whole process, the flue gas heater 6 uses surplus coal gas or steam waste heat, the surplus gas and the waste heat can be comprehensively utilized, and about 1500 ten thousand yuan of economic benefit is created every year

Further, the desulfurization spraying component comprises a desulfurizer conveying pipe 25, a rotating sleeve pipe 26 and a support frame 27 shaped like a Chinese character 'mi', the support frame 27 shaped like a Chinese character 'mi' is installed in the tower body 21, the rotating sleeve pipe 26 is rotatably installed at the center of the support frame 27 shaped like a Chinese character 'mi', the upper end and the lower end of the rotating sleeve pipe 26 are sealed by end plates, one end of the desulfurizer conveying pipe 25 is connected with the desulfurizer storage tank 3, the other end of the desulfurizer conveying pipe 25 is inserted into the rotating sleeve pipe 26 and rotatably connected with the rotating sleeve pipe 26, a plurality of spraying pipes 28 are uniformly distributed on the circumference of the lower part of the rotating sleeve pipe 26, a plurality of nozzles 29 are equidistantly installed at the bottom of the spraying pipes 28, a driving mechanism for driving the rotating sleeve pipe 26 to rotate is installed on the support frame 27 shaped like a Chinese character 'mi', when in use, lime slurry in the desulfurizer storage tank 3 enters the rotating sleeve pipe 26 through the desulfurizer conveying pipe 25, and the rotating sleeve pipe 26 continuously rotates under the driving action of the driving mechanism, during the rotation of the rotating sleeve 26, the lime slurry is distributed into each spraying pipe 28 and finally sprayed out from the nozzle 29, preferably, the driving mechanism comprises a driving motor 210, a driving gear 211 and a gear ring 212, the driving motor 210 is the prior art, the finished product is directly purchased according to the used power during the use process, the gear ring 212 is installed on the rotating sleeve 26, a casing is installed on the support frame 27 shaped like a Chinese character 'mi', the driving motor 210 is installed in the casing, the driving gear 211 is installed on the output shaft of the driving motor 210, the driving gear 211 is meshed with the gear ring 212, the driving motor 210 is started to drive the driving gear 211 to rotate, and the rotating sleeve 26 can be driven to rotate through the driving function of the gear ring 212.

Further, the gas distribution subassembly includes filter screen 213 and buckled plate 214, filter screen 213 is installed on tower body 21, buckled plate 214 is installed on filter screen 213, be provided with a plurality of bleeder vents on the buckled plate 214, the flue gas is favorable to improving the subsequent desulfurization effect of flue gas through flow equalizing of evenly distributed's bleeder vent on filter screen and the buckled plate.

Further, the gas adsorption component comprises an upper fixing plate 215 and a lower fixing plate 216 which are installed in the tower body 21 at intervals, a plurality of gas cylinders 217 are uniformly installed between the upper fixing plate 215 and the lower fixing plate 216, a lower hole plate is installed at the bottom of each gas cylinder 217, an upper hole plate is movably installed at the top of each gas cylinder 217, an adsorbent 218 is filled in each gas cylinder 217, the adsorbent 218 adopts activated carbon adsorption beads, the gas cylinders 217 which are uniformly distributed can increase contact between smoke and the adsorbent 218, and desulfurization is realized by utilizing adsorption performance of the adsorbent 218.

Further, gaseous water conservancy diversion subassembly includes 2 horizontal baffles 67 of crisscross arrangement of level from top to bottom at least, leaves the clearance between horizontal baffle 67 tip and the interior box 62, all is provided with polylith first baffle 68 on the upper surface of every horizontal baffle 67 and the lower surface interval, first baffle 68 is the slope with horizontal baffle 67 and arranges, and staggers each other between the first baffle 68 on two adjacent horizontal baffles 67 from top to bottom. A plurality of second baffle plates 69 are obliquely and alternately arranged on the top and the bottom of the inner box 62, and the second baffle plates 69 are arranged to intersect with the adjacent first baffle plates 68. The effect through the first baffle 68, horizontal baffle 67, the second baffle 69 that set up changes the flow direction of flue gas, and then the inside detention time of box 62 including the extension flue gas, and the heat exchange time of extension flue gas lets the heating of flue gas more abundant and even, is favorable to improving the heating effect of flue gas. Preferably, be provided with heat preservation 610 on the inner wall of outer box 61, heat preservation 610 adopts the rock wool material, and heat loss can be reduced in the setting of heat preservation 610, guarantees the stability of flue gas heating.

Claims

1. The utility model provides a steel rolling heating furnace's flue gas desulfurization dust collector, includes heating furnace flue (1), desulfurizing tower (2), desulfurizer storage tank (3) and sack cleaner (4), its characterized in that: a cyclone dust collector (5) and a flue gas heater (6) are sequentially arranged on a smoke exhaust pipe between the heating furnace flue (1) and the desulfurizing tower (2), the flue gas heater (6) comprises an outer box body (61), an inner box body (62), a first air inlet (63) and a first air outlet (64), a closed heating cavity is formed between the outer box body (61) and the inner box body (62), a spiral heating pipe (65) is arranged in the heating cavity, one end of the spiral heating pipe (65) is provided with a heat medium inlet, the other end of the spiral heating pipe is provided with a heat medium outlet, a heating cavity around the spiral heating pipe (65) is filled with a heat conducting ball (66), and a gas flow guiding component is arranged inside the inner box body (62); desulfurizing tower (2) are including tower body (21), second air inlet (22), second gas outlet (23) and ash discharge mouth (24), have set gradually desulfurization spraying subassembly, gas distribution subassembly and gas adsorption subassembly from the bottom up in tower body (21) between second air inlet (22) and second gas outlet (23).

2. The flue gas desulfurization and dust removal device of the steel rolling heating furnace according to claim 1, characterized in that: desulfurization spraying subassembly includes desulfurizer conveyer pipe (25), rotates sleeve pipe (26) and rice word support frame (27), and install in tower body (21) rice word support frame (27), it locates to rotate sleeve pipe (26) and rotate the center of installing at rice word support frame (27), it is sealed that the upper end and the lower extreme of rotating sleeve pipe (26) pass through the end plate, the one end of desulfurizer conveyer pipe (25) links to each other with desulfurizer storage tank (3), and the other end inserts and rotates in rotating sleeve pipe (26) and rotate with rotating sleeve pipe (26) and be connected, the lower part circumference equipartition of rotating sleeve pipe (26) is provided with many spray pipes (28), the equidistant a plurality of nozzles (29) of installing in bottom of spray pipe (28), install the drive on the rice word support frame (27) and rotate the actuating mechanism of sleeve pipe (26) rotation.

3. The flue gas desulfurization and dust removal device of the steel rolling heating furnace according to claim 2, characterized in that: the driving mechanism comprises a driving motor (210), a driving gear (211) and a gear ring (212), the gear ring (212) is installed on the rotating sleeve (26), a machine shell is installed on the support frame (27) shaped like a Chinese character 'mi', the driving motor (210) is installed in the machine shell, the driving gear (211) is installed on an output shaft of the driving motor (210), and the driving gear (211) is meshed with the gear ring (212).

4. The flue gas desulfurization and dust removal device of the steel rolling heating furnace according to claim 1, characterized in that: the gas distribution subassembly includes filter screen (213) and buckled plate (214), install on tower body (21) filter screen (213), buckled plate (214) are installed on filter screen (213), be provided with a plurality of bleeder vents on buckled plate (214).

5. The flue gas desulfurization and dust removal device of the steel rolling heating furnace according to claim 1, characterized in that: the gas adsorption component comprises an upper fixing plate (215) and a lower fixing plate (216) which are installed in the tower body (21) at intervals, a plurality of gas cylinders (217) are uniformly installed between the upper fixing plate (215) and the lower fixing plate (216), a lower hole plate is installed at the bottom of each gas cylinder (217), an upper hole plate is movably installed at the top of each gas cylinder (217), and an adsorbent (218) is filled in each gas cylinder (217).

6. The flue gas desulfurization and dust removal device of the steel rolling heating furnace according to claim 1, characterized in that: the gas diversion assembly at least comprises 2 horizontal partition plates (67) which are horizontally staggered from top to bottom, a gap is reserved between the end part of each horizontal partition plate (67) and the inner box body (62), a plurality of first baffle plates (68) are arranged on the upper surface and the lower surface of each horizontal partition plate (67) at equal intervals, each first baffle plate (68) is obliquely arranged with the corresponding horizontal partition plate (67), and the first baffle plates (68) on the two adjacent horizontal partition plates (67) are staggered from top to bottom.

7. The flue gas desulfurization and dust removal device of the steel rolling heating furnace according to claim 1, characterized in that: the top and the bottom in the inner box body (62) are provided with a plurality of second baffle plates (69) at inclined intervals, and the second baffle plates (69) and the adjacent first baffle plates (68) are arranged in a staggered mode.

8. The flue gas desulfurization and dust removal device of the steel rolling heating furnace according to claim 1, characterized in that: and a heat-insulating layer (610) is arranged on the inner wall of the outer box body (61).