Converter dedusting coarse ash collecting equipment
By introducing ash collection system and steam nozzles into the converter dust removal system, the collection effect of coarse ash in the flue gas is improved, the problem of excessive load of the electrostatic dust collector is solved, the service life of the equipment is extended and the stable emission of flue gas is achieved.
Patent Information
- Application Number
- CN202420321066.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-21
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-02-21
AI Technical Summary
The existing converter primary dust removal system lacks the ability to collect coarse ash in the gas in the evaporation cooler, resulting in a large amount of dust in the gas at the inlet of the electrostatic dust collector, increasing the load of the electrostatic dust collector, and having equipment wear and maintenance problems.
Design a converter dust removal and coarse ash collection equipment. By setting up an ash collection system with a certain dust removal function at the rear end of the evaporation cooler, the steam nozzle and the bent pipe flue improve the settlement effect of coarse ash in the flue gas, and collect it to Ash storage compartment reduces the burden on electrostatic dust collectors.
It increases the amount of coarse ash collected in the flue gas, reduces the dust content at the inlet of the electrostatic dust collector, extends the service life of the equipment, realizes long-term and stable emissions of the flue gas, and reduces equipment maintenance and wear.
Smart Images
Figure CN222165735U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of converter dust removal equipment, in particular to a converter dust removal and coarse ash collection equipment which can increase the coarse ash collection effect. Background Art
[0002] During the oxygen blowing and decarburization process of the converter, the reaction between carbon and oxygen will produce furnace gas with a high carbon monoxide content. To utilize the flue gas with a high calorific value, it must be cooled and purified. The converter primary dry dust removal system is a process whose main purpose is to treat the dust-containing converter flue gas, cool and purify all the flue gas generated during smelting, and recover the flue gas containing carbon monoxide for users. Its main advantages are: high dust removal and purification efficiency; no secondary pollution and sewage treatment; small system resistance loss, high gas calorific value, and the recovered dust can be directly used, saving energy.
[0003] The existing process flow of the converter primary dust removal system is as follows:
[0004] Converter flue gas → vaporization cooling flue → evaporative cooler → electrostatic precipitator → axial flow fan → gas cooler → switching station → venting chimney (or / and gas tank)
[0005] According to current environmental protection requirements, the requirements for primary flue gas emissions from converters are becoming increasingly stringent. When the evaporative cooler's ability to collect coarse ash in the coal gas is insufficient, the coal gas at the inlet of the electrostatic precipitator will contain a large amount of dust, thereby increasing the load on the electrostatic precipitator.
[0006] Increasing the amount of coarse ash collected from the converter can greatly improve and solve the problem of smoke emission in the early stage of smelting in some steel enterprises by reducing the dust concentration at the entrance of the electrostatic precipitator, increasing the dust removal margin of the precipitator, achieving stable dust removal, reducing pipeline wear, reducing system resistance, and solving the problem of smoke emission in the early stage of smelting in some steel enterprises. At the same time, it will also alleviate the production impact caused by equipment maintenance and equipment replacement to a certain extent. Utility Model Content
[0007] The utility model aims to provide a converter dust removal coarse ash collection device, which improves the collection amount of coarse ash in flue gas, reduces the dust concentration of the inlet of the electrostatic precipitator, increases the dust removal margin of the electrostatic precipitator, and realizes stable dust removal.
[0008] The utility model provides a converter dust removal and coarse ash collection device, which comprises:
[0009] an evaporative cooler, the inlet of which is connected to the converter through a flue gas duct;
[0010] The inlet of the ash collecting system is connected to the outlet of the evaporative cooler through a curved flue, and a dust removal mechanism is provided in the ash collecting system.
[0011] The dust removal and coarse ash collection equipment described in the utility model replaces the raw gas pipeline connected to the rear end of the evaporative cooler in the prior art with an ash collection system with a certain dust removal function, and the ash collection system is provided with a dust removal mechanism for flue gas dust removal; the ash collection system can perform further dust removal operations on the flue gas after passing through the evaporative cooler, increase the sedimentation effect of coarse ash in the flue gas, and then increase the coarse ash collection amount at the curved flue, reduce the dust removal burden of the rear electrostatic precipitator, increase the service life of the equipment, and achieve long-term and stable flue gas emissions.
[0012] In a preferred embodiment of the present invention, the evaporative cooler is disposed adjacent to the ash collecting system, and the flue gas flow direction in the evaporative cooler is opposite to the flue gas flow direction in the ash collecting system.
[0013] The evaporative cooler and the ash collection system are arranged in parallel to ensure that the coarse ash in the evaporative cooler and the ash collection system can fall smoothly into the curved flue at the bottom.
[0014] In a preferred embodiment of the present invention, the curved flue is a U-shaped curved pipe or a V-shaped curved pipe.
[0015] The flue bend may adopt a U-shaped pipe (banana pipe) used in the prior art to connect the evaporative cooler and the raw gas pipeline; preferably, in order to increase the collection effect of coarse ash in the flue bend, a V-shaped bend may also be adopted.
[0016] In a preferred embodiment of the present invention, an ash conveying mechanism is provided at the bottom of the curved flue, and the ash conveying mechanism has an ash outlet.
[0017] The ash conveying mechanism is used to transport the coarse ash that falls from the evaporative cooler and the ash collecting system into the flue bend to the ash storage bin through the ash outlet.
[0018] In a preferred embodiment of the present invention, the dust removal mechanism is a steam nozzle disposed in the ash collecting system, and the steam nozzle is connected to a steam pipe outside the ash collecting system.
[0019] The coarse ash in the flue gas is settled by spraying small droplets through the steam nozzle, thereby achieving the dust collection effect of the ash collection system.
[0020] In a preferred embodiment of the present invention, the direction of the steam nozzle is opposite to the flow direction of the flue gas in the ash collection system.
[0021] The flue gas flow direction and the flow direction of the gas ejected from the steam nozzle are arranged relative to each other, which can improve the steam dust removal effect and the collection effect of coarse ash in the flue gas.
[0022] In a preferred embodiment of the present invention, a plurality of the steam nozzles are spaced apart in the ash collecting system along the circumferential direction of the ash collecting system.
[0023] The setting of multiple steam nozzles can improve the collection effect of coarse ash in the flue gas on the one hand, and on the other hand, it can also improve the uniformity of the dust removal effect, avoiding large differences in the dust content of the flue gas at different positions in the same flow surface, which in turn leads to uneven wear and corrosion of the side wall.
[0024] In a preferred embodiment of the present invention, the ash collecting system is a cylinder placed in a vertical direction.
[0025] The diameter of the cylindrical structure ash collection system is significantly larger than the diameter of the original raw gas pipeline. It can play a certain role in slowing down and disturbing the flue gas, and increase the nucleation and combination of dust and water droplets in the flue gas.
[0026] In a preferred embodiment of the present invention, the bottom opening of the cylinder is connected to the elbow flue.
[0027] Preferably, the top opening of the cylinder is connected to an electrostatic precipitator through a flue gas duct. The electrostatic precipitator is used to further remove dust from the flue gas to improve the purification effect of the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:
[0029] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.
[0030] Figure 1 It is a structural schematic diagram of the converter dust removal and coarse ash collection equipment described in the utility model.
[0031] Description of Figure Numbers:
[0032] 10. Evaporative cooler;
[0033] 20. Ash collection system; 21. Steam nozzle; 22. Steam pipeline;
[0034] 30. Bend flue; 31. Ash conveying mechanism; 32. Ash outlet; DETAILED DESCRIPTION
[0035] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.
[0036] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.
[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0038] like Figure 1 As shown, the utility model provides a converter dust removal and coarse ash collection device, which includes: an evaporative cooler 10, whose inlet is connected to the converter through a flue gas duct; an ash collection system 20, whose inlet is connected to the outlet of the evaporative cooler 10 through a curved flue 30, and a dust removal mechanism is provided in the ash collection system 20.
[0039] The dust removal and coarse ash collection equipment described in the utility model replaces the raw gas pipeline connected to the rear end of the evaporative cooler 10 in the prior art with an ash collection system 20 with a certain dust removal function, and the ash collection system 20 is provided with a dust removal mechanism for flue gas dust removal; the ash collection system 20 can further remove dust from the flue gas after passing through the evaporative cooler 10, increase the sedimentation effect of coarse ash in the flue gas, and then increase the amount of coarse ash collected at the curved flue 30, reduce the dust removal burden of the rear electrostatic precipitator, increase the service life of the equipment, and achieve long-term and stable flue gas emissions.
[0040] Specifically, the evaporative cooler 10 is a vertically placed cylinder, the inlet at the upper end of which is connected to the outlet of the converter through a flue gas duct. The flue gas generated in the converter can enter the evaporative cooler 10 through the flue gas duct. The evaporative cooler 10 can perform initial cooling and rough dust removal on the flue gas. It is a commonly used equipment in existing dry dust removal methods. The specific structure and working principle of the evaporative cooler 10 will not be described in detail here.
[0041] Furthermore, the bottom outlet of the evaporative cooler 10 is connected to a curved flue 30, which is used to connect the evaporative cooler 10 and the ash collection system 20. One end of the curved flue 30 is connected to the bottom outlet of the evaporative cooler 10, and the other end is connected to the bottom inlet of the ash collection system 20.
[0042] The ash collecting system 20 is also a cylinder placed in the vertical direction. The ash collecting system 20 is arranged adjacent to the evaporative cooler 10. The flue gas flow direction in the evaporative cooler 10 is opposite to the flue gas flow direction in the ash collecting system 20. The flue gas entering the evaporative cooler 10 first flows vertically downward in the evaporative cooler 10, passes through the curved flue 30 and enters the ash collecting system 20, and then flows vertically upward.
[0043] The evaporative cooler 10 and the ash collection system 20 are arranged in parallel in the vertical direction to ensure that the coarse ash in the evaporative cooler 10 and the ash collection system 20 can smoothly fall into the elbow flue 30 at the bottom. The diameter of the cylindrical ash collection system 20 is significantly larger than the diameter of the original raw gas pipeline, which can play a certain role in reducing the speed and disturbing the flue gas, and increase the nucleation and combination of dust and water droplets in the flue gas.
[0044] Furthermore, the top opening of the ash collection system 20 is connected to the electrostatic precipitator through a flue gas duct (not shown in the figure), and the flue gas after dust removal by the ash collection system 20 can enter the electrostatic precipitator through the flue gas duct. The electrostatic precipitator is used to further remove dust from the flue gas to improve the purification effect of the flue gas. The electrostatic precipitator is a commonly used dust removal equipment in dry dust removal technology. It is usually arranged at the rear end of the evaporative cooler 10 for fine dust removal of the flue gas. The structure and working principle of the electrostatic precipitator will not be described in detail here.
[0045] According to one embodiment of the present utility model, Figure 1 As shown, the curved flue 30 is a U-shaped curved pipe or a V-shaped curved pipe.
[0046] like Figure 1 As shown, the flue bend 30 may adopt a U-shaped pipe (banana pipe) used in the prior art to connect the evaporative cooler 10 and the raw gas pipeline; preferably, in order to increase the collection effect of coarse ash in the flue bend 30, a V-shaped bend may also be adopted, and the V-shaped slope in the bend may increase the convergence effect of the coarse ash toward the bottom.
[0047] According to one embodiment of the present utility model, Figure 1 As shown, an ash conveying mechanism 31 is provided at the bottom of the curved flue 30 , and the ash conveying mechanism 31 has an ash outlet 32 .
[0048] The ash conveying mechanism 31 is used to convey the coarse ash dropped from the evaporative cooler 10 and the ash collecting system 20 into the flue bend 30 to an ash storage bin (not shown) for storage.
[0049] According to one embodiment of the present utility model, Figure 1 As shown, the dust removal mechanism is a steam nozzle 21 provided in the ash collection system 20, and the steam nozzle 21 is connected to a steam pipe 22 outside the ash collection system 20. The coarse ash in the flue gas is precipitated by spraying small droplets through the steam nozzle 21, thereby achieving the dust collection effect of the ash collection system 20.
[0050] Specifically, Figure 1 As shown, a plurality of steam pipes 22 connected to an external steam source are passed through the side wall of the ash collection system 20. One end of the steam pipe 22 located in the ash collection system 20 is connected to a steam nozzle 21. The steam flowing in the steam pipe 22 can spray small droplets formed by steam liquefaction into the ash collection system 20 through the steam nozzle 21. Large coarse ash formed by the contact between the small droplets and large dust particles in the flue gas falls into the curved flue 30 under the action of gravity.
[0051] Furthermore, the direction of the steam nozzle 21 is opposite to the flow direction of the flue gas in the ash collection system 20. The flue gas flow direction and the flow direction of the gas ejected from the steam nozzle 21 are arranged opposite to each other to improve the steam dust removal effect and the collection effect of coarse ash in the flue gas.
[0052] According to one embodiment of the present utility model, Figure 1 As shown, along the circumferential direction of the ash collecting system 20 , a plurality of steam nozzles 21 are arranged at intervals in the ash collecting system 20 .
[0053] The provision of multiple steam nozzles 21 can improve the collection effect of coarse ash in the flue gas on the one hand, and on the other hand, it can also improve the uniformity of the dust removal effect, avoiding large differences in the dust content of the flue gas at different positions in the same flow surface, which in turn leads to uneven wear and corrosion of the side wall.
[0054] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.
Claims
1. A converter dust removal and coarse ash collection device, characterized in that: include: an evaporative cooler, the inlet of which is connected to the converter through a flue gas duct; The inlet of the ash collecting system is connected to the outlet of the evaporative cooler through a curved flue, and a dust removal mechanism is provided in the ash collecting system.
2. The converter dust removal and coarse ash collection equipment according to claim 1, characterized in that: The evaporative cooler is arranged adjacent to the ash collecting system, and the flue gas flow direction in the evaporative cooler is opposite to the flue gas flow direction in the ash collecting system.
3. The converter dust removal and coarse ash collection equipment according to claim 1, characterized in that: The curved flue is a U-shaped curved pipe or a V-shaped curved pipe.
4. The converter dust removal and coarse ash collection equipment according to claim 1 or 3, characterized in that: An ash conveying mechanism is provided at the bottom of the curved flue, and the ash conveying mechanism has an ash outlet.
5. The converter dust removal and coarse ash collection equipment according to claim 1, characterized in that: The dust removal mechanism is a steam nozzle arranged in the ash collecting system, and the steam nozzle is connected to a steam pipe outside the ash collecting system.
6. The converter dust removal and coarse ash collection equipment according to claim 5, characterized in that: The direction of the steam nozzle is opposite to the flow direction of the flue gas in the ash collection system.
7. The converter dust removal and coarse ash collection equipment according to claim 5 or 6, characterized in that: Along the circumferential direction of the ash collecting system, a plurality of the steam nozzles are arranged at intervals in the ash collecting system.
8. The converter dust removal and coarse ash collection equipment according to claim 1, characterized in that: The ash collecting system is a cylinder placed in a vertical direction.
9. The converter dust removal and coarse ash collection equipment according to claim 8, characterized in that: The bottom opening of the cylinder is connected to the elbow flue.
10. The converter dust removal and coarse ash collection equipment according to claim 8 or 9, characterized in that: The top opening of the cylinder is connected to the electrostatic precipitator through a flue gas duct.