CN210765381U - LT dry dedusting system - Google Patents
LT dry dedusting system Download PDFInfo
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- CN210765381U CN210765381U CN201921981974.7U CN201921981974U CN210765381U CN 210765381 U CN210765381 U CN 210765381U CN 201921981974 U CN201921981974 U CN 201921981974U CN 210765381 U CN210765381 U CN 210765381U
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Abstract
The utility model discloses a LT dry dedusting system, which comprises a movable smoke hood, a vaporization cooling flue, an evaporation cooling tower, an electrostatic precipitator, a fan, a cooling, dedusting and dehydration integrated tower, a three-way valve, a gas holder and/or a diffusion chimney which are connected in sequence through pipelines, wherein the movable smoke hood is connected with a converter to collect smoke dust, an atomizing nozzle capable of spraying fine water drops is arranged in the evaporation cooling tower, the outlet at the lower part of the evaporation cooling tower is connected with a double-layer ash unloading valve, and the lower part of the double-layer ash unloading valve is connected with an ash storage bin; the inlet pipeline of the cooling, dedusting and dewatering integrated tower is connected with the fan, and the outlet pipeline of the cooling, dedusting and dewatering integrated tower is respectively connected with the gas chamber and/or the diffusing chimney through a three-way valve.
Description
Technical Field
The utility model belongs to in converter gas cleaning's field, concretely relates to LT dry process dust pelletizing system.
Background
At present, there are two main methods for purifying flue gas of a large converter: OG wet purification system and "LT" dry purification system. Converter LT dry dedusting systems have been rapidly developed since their success in German trials in 1983. With the stricter emission standard, the emission concentration of the flue gas discharged from the top station reaches 10mg/Nm3The requirement of ultralow emission standard, but no matter which process treatment method, the fine particles in the flue gas are difficult to remove, and the ultralow emission requirement is difficult to achieve. Therefore, the LT dry dedusting process is in urgent need of upgrading and reconstructing on the basis of the original system.
In view of this, the present invention is especially provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a LT dry process dust pelletizing system can get rid of the tiny granule in the flue gas, reaches the fume emission concentration and is not higher than 10mg Nm3Ultra-low emission requirements.
In order to achieve the purpose, the utility model provides a LT dry dedusting system, include the movable petticoat pipe, the evaporation cooling flue, the evaporative cooling tower, the electrostatic precipitator, the fan, the gas chamber and/or diffuse the chimney that pass through the pipe connection in order, wherein the movable petticoat pipe is connected the converter in order to collect the smoke and dust, the lower part exit linkage of evaporative cooling tower has double-deck unloading valve, and unloading valve sub-unit connection ash storage storehouse, the ash in ash storehouse is transported away with the fortune ash car; LT dry process dust pelletizing system still includes the integrative tower of cooling dust removal dehydration, the inlet pipeline of the integrative tower of cooling dust removal dehydration connects the fan, the outlet conduit of the integrative tower of cooling dust removal dehydration passes through the three-way valve and connects respectively gas chamber and/or diffuse the chimney.
Further, the cooling, dedusting and dewatering integrated tower comprises a washing and cooling section, a sound wave agglomeration section and a dewatering section, wherein the dewatering section is provided with a rotational flow blade capable of collecting water mist and water drops.
Furthermore, a servo valve is installed on an inlet pipeline of the electrostatic dust collector, a micro differential pressure device is installed on the vaporization cooling flue, and the servo valve is interlocked with the furnace mouth micro differential pressure device arranged on the vaporization cooling flue.
Furthermore, a water seal check valve and a stop valve are installed on an inlet pipeline of the gas tank.
The utility model provides a pair of LT dry process dust pelletizing system new technology has following beneficial effect:
1. the device has the advantages of water saving, electricity saving, small system resistance and small occupied area;
2. the fine particles in the flue gas are easier to capture and collect, and the emission concentration of the treated flue gas is not higher than 10mg/Nm3And the requirement of ultra-low emission can be met.
Drawings
Fig. 1 is a schematic structural diagram of a LT dry dedusting system in a specific embodiment.
In the figure:
1. the movable smoke hood 2, the vaporization cooling flue 3, the evaporation cooling tower 4, the servo valve 5, the electrostatic dust collector 6, the fan 7, the cooling, dust removing and dewatering integrated tower 8, the three-way valve 9, the gas tank 10, the emission chimney 11, the water seal check valve 12, the stop valve 13 and the ash storage bin.
Detailed Description
In order to make the technical field better understand the solution of the present invention, the present invention will be further described in detail with reference to the following embodiments.
As shown in fig. 1, an LT dry dedusting system comprises a movable smoke hood 1, an evaporative cooling flue 2, an evaporative cooling tower 3, an electrostatic precipitator 5, a fan 6, a cooling, dedusting and dewatering integrated tower 7, a gas holder 9 and a diffusing chimney 10 which are connected in sequence through pipelines. The movable smoke hood 1 is connected to a converter to collect smoke dust, a double-layer ash discharge valve is connected to an outlet at the lower part of the evaporative cooling tower 3, an ash storage bin 13 is connected to the lower part of the ash discharge valve, and ash in the ash storage bin 13 is transported away by an ash transport vehicle. Be equipped with the atomizing nozzle that can spout tiny water droplet in the evaporative cooling tower 3, atomizing nozzle spun tiny water droplet can cool off high temperature flue gas, and the water spray capacity can carry out accurate control according to the flue gas caloric content, and the tiny water droplet after the cooling flue gas evaporates completely, and tiny water droplet still carries out the quenching and tempering to the flue gas when cooling down to the flue gas, makes the specific resistance of dust be favorable to electrostatic precipitator 5's entrapment. A servo valve 4 is installed on an inlet pipeline of the electrostatic dust collector 5, a micro differential pressure device is installed on the vaporization cooling flue, the servo valve 4 is interlocked with a converter mouth micro differential pressure device arranged on the vaporization cooling flue 2, when the smoke volume of the converter mouth fluctuates, the servo valve 4 of the interlocking micro differential pressure device can quickly make a response, so that the micro positive pressure state of the converter mouth is ensured, and the converter mouth is ensured not to overflow a large amount of smoke. The cooling, dedusting and dewatering integrated tower 7 replaces a coal gas cooling tower in the original LT dry dedusting process, and the cooling, dedusting and dewatering integrated tower 7 is arranged behind a fan 6 and is used for carrying out fine dedusting on the flue gas passing through an electrostatic precipitator 5; the cooling, dedusting and dewatering integrated tower 7 consists of a washing and cooling section, an acoustic agglomeration section and a dewatering section, wherein the dewatering section comprises a rotational flow blade capable of collecting water mist and water drops; the integrative tower 7 of cooling dust removal dehydration utilizes the sound wave reunion defogging technique, makes the fine particle in the flue gas bump to make granule number concentration reduce, average particle diameter increase, become easily caught, make the water smoke water droplet in the flue gas more easily collected by whirl blade when passing through the dehydration section, later the tiny granule in the exhaust flue gas, thereby reach the requirement of ultralow emission. Install three-way valve 8 on the export pipeline of integrative tower 7 of cooling dust removal dehydration, the chimney 10 is diffused in the one end intercommunication of three-way valve 8 export, and the other end intercommunication gas chamber 9 of three-way valve 8 export installs water seal check valve 11 and trip valve 12 on the inlet pipeline of gas chamber 9, prevents the flue gas refluence in the gas chamber 9.
The new LT dry dedusting process includes the following steps:
(1) the flue gas generated by the converter passes through the movable smoke hood 1 and the vaporization cooling flue 2, and primary cooling is carried out on the flue gas while heat energy is recovered;
(2) the flue gas cooled by the vaporization cooling flue 2 is secondarily cooled and coarsely dedusted by the vaporization cooling tower 3, fine water drops sprayed by an atomizing nozzle of the vaporization cooling tower 3 can cool the high-temperature flue gas, the water spraying amount can be accurately controlled according to the heat content of the flue gas, the fine water drops after cooling the flue gas are completely evaporated, the flue gas can be cooled to 200 ℃, the fine water drops cool the flue gas and simultaneously perform conditioning treatment on the flue gas, and the specific resistance of dust is favorable for trapping of the electrostatic precipitator 5.
(3) The smoke after the secondary cooling and conditioning treatment of the evaporative cooling tower 3 enters an electrostatic dust collector 5 for electrostatic dust collection, and the dust content (standard state) of the smoke is reduced to 25mg/m after the electrostatic dust collection3；
(4) The flue gas after electrostatic dust removal treatment enters a cooling, dust removal and dehydration integrated tower 7 through a fan 6, a sound wave agglomeration demisting technology is utilized, appropriate acoustic frequency and intensity are selected according to actual conditions on site, fine particles in the flue gas are collided, the number concentration of the particles is reduced, the average particle size is increased, the particles are easy to capture, water mist droplets in the flue gas are collected by a cyclone blade when passing through a dehydration section, then the fine particles in the flue gas are removed, and the emission concentration of the flue gas after being treated by the cooling, dust removal and dehydration integrated tower 7 is not higher than 10mg/Nm3The smoke temperature is not more than 70 ℃, and the smoke temperature reaches the ultra-low emission standard;
(5) and (4) switching the flue gas treated in the steps (1) to (4) to a diffusion chimney 10 through a three-way valve 8 for diffusion or carrying out coal gas recovery.
The utility model provides a LT dry process dust pelletizing system, it is water-saving, economize on electricity, the advantage that system resistance is little and area is little, on the basis of original LT dry process dust removal technology, get rid of fan 6 back bell jar valve, and change the gas cooler into cooling dust removal dehydration integrative tower 7, utilize the sound wave to reunite the defogging technique, make the collision of fine particle in the flue gas, thereby make granule figure concentration reduce, the average particle diameter increase, it is caught easily to become, make the water smoke water droplet in the flue gas more easily collected by whirl blade when through the dehydration section, tiny granule in the flue gas of later discharging, flue gas emission concentration after handling is not higher than 10mg/Nm3Thereby meeting the requirement of ultra-low emission.
The inventive concept is explained in detail herein using specific examples, and the above description of the embodiments is only used to help understand the core idea of the present invention. It should be understood that any obvious modifications, equivalents and other improvements made by those skilled in the art without departing from the spirit of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. An LT dry dedusting system comprises a movable smoke hood, an evaporative cooling flue, an evaporative cooling tower, an electrostatic precipitator, a fan, a gas holder and/or a diffusion chimney which are sequentially connected through a pipeline, wherein the movable smoke hood is connected with a converter to collect smoke dust, an atomizing nozzle capable of spraying atomized water drops is arranged in the evaporative cooling tower, a lower outlet of the evaporative cooling tower is connected with a double-layer ash discharge valve, and the lower part of the double-layer ash discharge valve is connected with an ash storage bin; the LT dry dedusting system is characterized by further comprising a cooling, dedusting and dehydrating integrated tower, wherein an inlet pipeline of the cooling, dedusting and dehydrating integrated tower is connected with the fan, and an outlet pipeline of the cooling, dedusting and dehydrating integrated tower is respectively connected with the gas cabinet and/or the diffusing chimney through a three-way valve.
2. The LT dry dedusting system of claim 1, wherein the temperature reduction, dedusting and dehydration integrated tower comprises a washing and cooling section, an acoustic agglomeration section and a dehydration section, and the dehydration section is provided with a cyclone blade capable of collecting water mist water drops.
3. The LT dry dedusting system according to claim 1, wherein a servo valve is installed on the inlet pipe of the electrostatic precipitator, a micro differential pressure device is installed on the evaporative cooling flue, and the servo valve is interlocked with a furnace mouth micro differential pressure device arranged on the evaporative cooling flue.
4. The LT dry dedusting system according to claim 1, wherein a water seal check valve and a shut-off valve are installed on the inlet pipeline of the gas tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921981974.7U CN210765381U (en) | 2019-11-14 | 2019-11-14 | LT dry dedusting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921981974.7U CN210765381U (en) | 2019-11-14 | 2019-11-14 | LT dry dedusting system |
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| CN210765381U true CN210765381U (en) | 2020-06-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110628982A (en) * | 2019-11-14 | 2019-12-31 | 北京博鹏中科环保科技有限公司 | LT dry dedusting system and LT dry dedusting method |
| CN113005257A (en) * | 2021-02-25 | 2021-06-22 | 中冶南方工程技术有限公司 | Converter flue gas treatment system and operation method thereof |
-
2019
- 2019-11-14 CN CN201921981974.7U patent/CN210765381U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110628982A (en) * | 2019-11-14 | 2019-12-31 | 北京博鹏中科环保科技有限公司 | LT dry dedusting system and LT dry dedusting method |
| CN113005257A (en) * | 2021-02-25 | 2021-06-22 | 中冶南方工程技术有限公司 | Converter flue gas treatment system and operation method thereof |
| CN113005257B (en) * | 2021-02-25 | 2023-09-15 | 中冶南方工程技术有限公司 | Converter flue gas treatment system and operation method thereof |
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