A dry dust collection system suitable for ultrafine titanium concentrate
Patent Information
- Application Number
- CN202522643664.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-12
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-12
AI Technical Summary
Existing drying and dust collection systems suffer from problems such as insufficient collection capacity, negative impact of enrichment behavior on the system, high equipment wear and high energy consumption when processing ultrafine titanium concentrate.
A two-stage dust removal system combining a single-stage cyclone dust collector and an electrostatic-bag filter is adopted. A heat exchange duct is added to regulate the exhaust gas temperature, and the wet electrostatic precipitator is eliminated. The dust removal fan is arranged between the electrostatic-bag filter and the desulfurization spray tower.
It improves the collection efficiency of ultrafine titanium concentrate, avoids enrichment behavior, reduces equipment wear and energy consumption, and lowers system investment and operating costs.
Smart Images
Figure CN224933138U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of titanium concentrate drying technology, specifically a drying and dust collection system suitable for ultrafine titanium concentrate. Background Technology
[0002] Currently, in order to increase the yield of titanium concentrate in the beneficiation process, ore dressing plants produce titanium concentrate products containing a large amount of fine and ultrafine titanium concentrate powder. This titanium concentrate powder after the beneficiation process is not suitable for direct sale as a product; its moisture content must be reduced to below 0.5% before it can be considered a finished product.
[0003] Currently, the main methods for drying titanium concentrate are indirect drying and direct drying. Indirect drying has low heat exchange efficiency, which greatly increases the energy consumption of the drying system. Direct drying is generally used to dry titanium concentrate, but fine and ultrafine particles in the concentrate will enter the dust collection system with the drying exhaust gas. Titanium concentrate has high hardness and causes significant wear on bag filters; therefore, multi-stage cyclone dust collection combined with wet dust collection is typically used to recover the titanium concentrate dust. Cyclone dust collection has a weak ability to capture fine and ultrafine dust, mainly responsible for removing large particles from the exhaust gas. Fine and ultrafine titanium concentrate particles are largely captured during the wet dust collection stage, entering the dust collection wastewater and sludge, and cannot be directly formed into a product; they must be returned to the drying system for further drying. Fine and ultrafine titanium concentrate particles easily accumulate in the system, negatively impacting the efficiency of the titanium concentrate drying system.
[0004] A typical existing drying and dust collection process is as follows: 1. Fuel enters the fluidized bed furnace and begins to burn and provide heat under the condition that the combustion fan provides combustion air; 2. The wet titanium concentrate is fed into the single-drum dryer through the titanium concentrate feeding equipment, where it is heated by the hot air provided by the fluidized bed furnace to dry the moisture. 3. After the drying process is completed, the dry titanium concentrate is discharged from the dryer outlet, and the waste gas containing titanium concentrate powder enters the dust removal system; 4. Powered by a dust removal fan, the titanium concentrate powder passes through multiple stages of cyclone dust removal and then enters a spray tower and a wet electrostatic precipitator. The titanium concentrate powder collected by the cyclone dust collector is directly recycled as a product. 5. Fine-grained titanium concentrate dust is captured in the spray tower and wet electrostatic precipitator. At the same time, the spray tower also removes harmful substances such as sulfur from the flotation reagents. The fine-grained titanium concentrate and desulfurization wastewater are returned to the drying system together, and the flue gas is discharged.
[0005] Although this process can achieve drying and pollution control of titanium concentrate, it still has significant shortcomings in terms of fine-particle material recovery, system anti-enrichment, equipment wear prevention, and operating energy consumption. There is an urgent need for a more efficient, stable, and economical drying and dust collection system. Utility Model Content
[0006] To address the technical problems existing in the prior art, this utility model provides a drying and dust collection system suitable for ultrafine titanium concentrate. It optimizes the direct drying and dust collection process of titanium concentrate, enabling it to collect ultrafine titanium concentrate and avoiding the negative impact of the enrichment behavior of ultrafine titanium concentrate on the entire drying system.
[0007] To achieve the above objectives, this utility model provides the following technical solution: A drying and dust collection system suitable for ultrafine titanium concentrate includes: Fluidized bed furnace feeding equipment, fluidized bed furnace, combustion fan, titanium concentrate feeding equipment, single-drum dryer, cyclone dust collector, heat exchange air duct, heat exchange air valve, electrostatic-bag dust collector, dust removal fan, desulfurization spray tower and dry titanium concentrate discharge equipment; The feed inlet of the fluidized bed furnace is connected to the fluidized bed furnace feeding device; The outlet of the combustion blower leads to the inlet of the fluidized bed furnace; The feed inlet of the single-drum dryer is connected to the titanium concentrate feeding equipment, and its hot air inlet is connected to the hot air outlet of the fluidized bed furnace. The exhaust port of the single-drum dryer is connected to the air inlet of the cyclone dust collector; The outlet of the cyclone dust collector is connected to the inlet of the electrostatic-bag dust collector. The outlet of the electrostatic precipitator is connected to the inlet of the desulfurization spray tower through the dust removal fan; The two ends of the heat exchange air duct are respectively connected to the outlet of the fluidized bed furnace and the tail cover of the single-drum dryer; the heat exchange air valve is provided on the heat exchange air duct; The dry material outlet of the single-drum dryer, the ash discharge port of the cyclone dust collector, and the ash discharge port of the electrostatic-bag dust collector all lead to the dry titanium concentrate discharge equipment. The desulfurization spray tower is equipped with a wastewater outlet, which leads to the front section of the drying system.
[0008] Furthermore, the dust removal system includes the single-stage cyclone dust collector, the electrostatic-bag filter, and the desulfurization spray tower.
[0009] Furthermore, the heat exchange air duct bypasses part of the high-temperature hot air from the fluidized bed furnace outlet to the exhaust port of the single-drum dryer to regulate the exhaust gas temperature there.
[0010] Furthermore, the electrostatic-bag filter is provided with an electrostatic dust removal section and a bag dust removal section arranged sequentially along the airflow direction inside.
[0011] Furthermore, the dust removal fan is installed in the air path between the outlet of the electrostatic-bag filter and the inlet of the desulfurization spray tower.
[0012] Furthermore, the system does not include a wet electrostatic precipitator.
[0013] Furthermore, the dry titanium concentrate discharge equipment used to collect and convey the dry material from the single-drum dryer, cyclone dust collector, and electrostatic-bag dust collector is one or a combination of a screw conveyor, scraper conveyor, or belt conveyor.
[0014] Furthermore, the electrostatic-baghouse dust collector is a combined dust removal device, which has an electrostatic dust removal section and a baghouse dust removal section arranged sequentially from front to back inside, and the air outlet of the electrostatic dust removal section is connected to the air inlet of the baghouse dust removal section.
[0015] Furthermore, the wastewater outlet of the desulfurization spray tower is connected to the upstream concentration device through a pipeline. The upstream concentration device is the relevant device in the concentration process in the upstream process of this system.
[0016] Furthermore, the bag filter section in the electrostatic-bag filter uses membrane-coated or wear-resistant filter bags.
[0017] The beneficial effects of this utility model are: Compared with the prior art, the drying and dust collection system for ultrafine titanium concentrate described in this utility model has the following technical features and beneficial effects: (1) This utility model replaces the original cyclone dust collector with an electrostatic bag filter, which improves the dust collection efficiency; it promotes the capture of fine titanium concentrate dust at the front end, effectively divides the exhaust gas treatment system into dust removal zone and desulfurization zone, improves their respective working efficiency, and effectively avoids the enrichment behavior of fine titanium concentrate particles in the system. (2) Due to the working characteristics of the electrostatic precipitator-bag filter, the particles in the exhaust gas will carry a certain charge after passing through the electrostatic precipitator in the first stage of the electrostatic precipitator-bag filter. This will prevent the particles in the exhaust gas from getting too close to the filter bags in the first stage of the bag filter, and will more effectively improve the collection efficiency of ultrafine titanium concentrate powder. In addition, after the large-diameter titanium concentrate dust is treated by cyclone dust collector and electrostatic precipitator, it is basically captured clean. The wear of titanium concentrate dust on the bag filter is greatly reduced, and the service life of the filter bags is effectively improved. (3) This utility model ensures the temperature operation of the subsequent electrostatic-bag dust collector by adding a heat exchange air pipe directly connected to the outlet of the fluidized bed furnace to the outlet of the dryer; (4) This utility model eliminates the wet electrostatic precipitator equipment, reducing the investment in the titanium concentrate drying system; (5) By arranging the dust removal fan between the electrostatic bag filter and the desulfurization spray tower, this utility model reduces the erosion of the dust removal fan by water and water vapor in the exhaust gas discharged from the desulfurization spray tower, and improves the service life of the dust removal fan. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the system connection for the drying and dust collection system of the present invention applicable to ultrafine titanium concentrate; The attached diagram is labeled as follows: 1-Fluidized bed furnace feeding equipment, 2-Fluidized bed furnace, 3-Combustion fan, 4-Titanium concentrate feeding equipment, 5-Single-drum dryer, 6-Cyclone dust collector, 7-Heat exchange air duct, 8-Heat exchange air valve, 9-Electrostatic-bag dust collector, 10-Dust removal fan, 11-Desulfurization spray tower, 12-Dry titanium concentrate discharge equipment. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. The following description, in conjunction with the accompanying drawings... Figure 1 Further explanation is provided regarding the drying and dust collection system applicable to ultrafine titanium concentrate.
[0020] Example 1 The purpose of this embodiment is to provide a drying and dust collection system suitable for ultrafine titanium concentrate, which has the ability to collect ultrafine titanium concentrate and avoids the negative impact of the enrichment behavior of ultrafine titanium concentrate on the entire drying system. This is achieved through the following technical solution: A drying and dust collection system suitable for ultrafine titanium concentrate includes a fluidized bed furnace feeding device 1, a fluidized bed furnace 2, a combustion fan 3, a titanium concentrate feeding device 4, a single-drum dryer 5, a cyclone dust collector 6, a heat exchange air duct 7, a heat exchange air valve 8, an electrostatic-bag filter dust collector 9, a dust removal fan 10, and a desulfurization spray tower 11.
[0021] The feed inlet of the fluidized bed furnace 2 is connected to the fluidized bed furnace feeding device 1; the outlet of the combustion fan 3 leads to the inlet of the fluidized bed furnace 2; the feed inlet of the single-drum dryer 5 is connected to the titanium concentrate feeding device 4, and its hot air inlet is connected to the hot air outlet of the fluidized bed furnace 2; the exhaust port of the single-drum dryer 5 is connected to the inlet of the cyclone dust collector 6; the outlet of the cyclone dust collector 6 is connected to the inlet of the electrostatic precipitator-bag filter 9; the outlet of the electrostatic precipitator-bag filter 9 leads to the [other part of the fluidized bed furnace 2] via the dust collector fan 10. The desulfurization spray tower 11 has an air inlet; the two ends of the heat exchange air pipe 7 are respectively connected to the pipe between the hot air outlet of the fluidized bed furnace 2 and the hot air inlet of the single-drum dryer 5, and to the exhaust port of the single-drum dryer 5; the heat exchange air valve 8 is installed on the heat exchange air pipe 7; the dry material outlet of the single-drum dryer 5, the ash discharge port of the cyclone dust collector 6, and the ash discharge port of the electrostatic-bag dust collector 9 all lead to the dry titanium concentrate discharge equipment 12; the desulfurization spray tower 11 is provided with a wastewater outlet, which leads to the front section of the drying system.
[0022] Fuel enters the fluidized bed furnace 2 and begins to burn to provide heat under the condition of combustion air provided by the combustion fan 3. The wet titanium concentrate enters the single-drum dryer 5 through the titanium concentrate feeding device 4 and is heated by the hot air provided by the fluidized bed furnace 2 to dry the moisture. After the drying process is completed, the dry titanium concentrate is discharged from the outlet of the single-drum dryer 5, and the exhaust gas enters the dust removal system to collect titanium concentrate dust. A new heat exchange air pipe 7 is added to the outlet of the fluidized bed furnace 2 and directly connected to the outlet of the single-drum dryer 5 to ensure that the exhaust gas temperature is higher than the dew point. The exhaust gas is powered by the dust removal fan 10, and after being treated by the cyclone dust collector 6, it enters the electrostatic-bag dust collector 9 for further treatment. Finally, the exhaust gas is treated by desulfurization and dust removal in the desulfurization spray tower 11, and the flue gas is discharged. The wastewater is returned to the front of the drying system.
[0023] Compared with the prior art, the technical features of this utility model are as follows: (1) This utility model transforms a multi-stage cyclone dust collection system into a single-stage cyclone dust collection system combined with an electrostatic-bag dust collection system; (2) In this utility model, a heat exchange air pipe 7 is added to the outlet of the fluidized bed furnace 2 and directly connected to the outlet of the single-drum dryer 5 to achieve control of the flue gas temperature at the outlet of the single-drum dryer 5. (3) This utility model eliminates the final wet electrostatic precipitator; (4) In this utility model, the dust removal fan 10 is arranged between the electrostatic bag filter and the desulfurization spray tower 11.
[0024] Example 2 This embodiment is either a new embodiment or a supplement to Embodiment 1.
[0025] A drying and dust collection system suitable for ultrafine titanium concentrate includes a fluidized bed furnace feeding device 1, a fluidized bed furnace 2, a combustion fan 3, a titanium concentrate feeding device 4, a single-drum dryer 5, a cyclone dust collector 6, a heat exchange air duct 7, a heat exchange air valve 8, an electrostatic-bag filter dust collector 9, a desulfurization spray tower 11, and a dry titanium concentrate discharge device 12.
[0026] Fuel enters the fluidized bed furnace 2 through the fluidized bed furnace feeder 1 and begins to burn to provide heat under the condition of combustion air provided by the combustion fan 3. Wet titanium concentrate enters the single-drum dryer 5 through the titanium concentrate feeder 4, where it is heated by the hot air provided by the fluidized bed furnace 2 to remove moisture. After the drying process, the dry titanium concentrate is discharged from the outlet of the single-drum dryer 5. The exhaust gas enters the dust removal system to collect titanium concentrate dust. A new heat exchange air duct 7 (with a heat exchange air valve 8) is added to the outlet of the fluidized bed furnace 3 and directly connected to the outlet of the single-drum dryer 5 to ensure that the exhaust gas temperature is higher than the dew point. The exhaust gas is powered by the dust removal fan 10, first undergoing primary treatment by the cyclone dust collector 6, then entering the electrostatic-bag filter dust collector 9 for secondary dust removal, and finally undergoing desulfurization treatment by the desulfurization spray tower 11 before being discharged. The wastewater from the desulfurization spray tower 11 is returned to the drying system. Dry titanium concentrate and dust enter the dry titanium concentrate discharge equipment 12 through the outlet of the single-drum dryer 3, the outlet of the cyclone dust collector 6, and the outlet of the electrostatic-bag dust collector 9, respectively. The dry titanium concentrate is then conveyed to the finished product system through the dry titanium concentrate discharge equipment 12.
[0027] Preferably, the multi-stage cyclone dust collection system is transformed into a single-stage cyclone dust collection system combined with an electrostatic-bag filter system; After the drying process is completed, the dry titanium concentrate is discharged from the outlet of the single-drum dryer 5. The exhaust gas enters the dust removal system to collect titanium concentrate dust. A heat exchange air pipe 7 (with a heat exchange air valve 8 on the pipe) is added to the outlet of the fluidized bed furnace 3 and directly connected to the outlet of the single-drum dryer 5 to ensure that the exhaust gas temperature is higher than the dew point. After being treated by the cyclone dust collector 6, the exhaust gas enters the electrostatic-bag dust collector 9 for secondary dust removal and finally enters the desulfurization spray tower 11 for desulfurization treatment. The flue gas is then discharged and the wastewater is returned to the drying system. Dry titanium concentrate and dust enter the dry titanium concentrate discharge equipment 12 through the outlet of the single-drum dryer 3, the outlet of the cyclone dust collector 6, and the outlet of the electrostatic-bag dust collector 9, respectively. The dry titanium concentrate is then transported to the finished product system through the dry titanium concentrate discharge equipment 12; the dust removal fan 10 is arranged between the electrostatic-bag dust collector and the desulfurization spray tower 11.
[0028] The drying and dust collection system provided in this embodiment employs a two-stage high-efficiency dust collection combination of "single-stage cyclone dust collector + electrostatic-bag filter dust collector," and adds a heat exchange air duct to regulate the exhaust gas temperature in real time. This not only significantly improves the collection efficiency of ultrafine titanium concentrate but also effectively prevents the circulation and enrichment of fine particles within the system. Simultaneously, it greatly reduces dust wear on the filter bags, extending the service life of critical equipment. Furthermore, placing the dust collection fan between the electrostatic-bag filter dust collector and the desulfurization spray tower effectively isolates the fan from corrosion by the wet flue gas, further enhancing the system's stability and reliability.
[0029] The system has a reasonable structure and smooth process connection. While ensuring the drying quality and dust collection effect of titanium concentrate, it simplifies the process configuration, avoids the use of wet electrostatic precipitators, and reduces investment and operating costs. It provides a reliable technical solution for the efficient and economical drying of ultrafine titanium concentrate and has good prospects for industrial application.
[0030] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A drying and dust collection system suitable for ultrafine titanium concentrate, characterized in that, include: Fluidized bed furnace feeding equipment (1), fluidized bed furnace (2), combustion fan (3), titanium concentrate feeding equipment (4), single-drum dryer (5), cyclone dust collector (6), heat exchange air duct (7), heat exchange air valve (8), electrostatic-bag dust collector (9), dust removal fan (10), desulfurization spray tower (11) and dry titanium concentrate discharge equipment (12); The feed inlet of the fluidized bed furnace (2) is connected to the fluidized bed furnace feeding device (1). The outlet of the combustion fan (3) leads to the inlet of the fluidized bed furnace (2); The feed inlet of the single-drum dryer (5) is connected to the titanium concentrate feeder (4), and its hot air inlet is connected to the hot air outlet of the fluidized bed furnace (2). The exhaust port of the single-drum dryer (5) is connected to the air inlet of the cyclone dust collector (6); The outlet of the cyclone dust collector (6) is connected to the inlet of the electrostatic-bag dust collector (9); The outlet of the electrostatic bag filter (9) is connected to the inlet of the desulfurization spray tower (11) through the dust removal fan (10); The two ends of the heat exchange air pipe (7) are respectively connected to the outlet of the fluidized bed furnace (2) and the tail cover of the single-drum dryer (5), and the heat exchange air valve (8) is installed on the heat exchange air pipe (7). The dry material outlet of the single-drum dryer (5), the ash discharge port of the cyclone dust collector (6) and the ash discharge port of the electrostatic-bag dust collector (9) all lead to the dry titanium concentrate discharge equipment (12). The desulfurization spray tower (11) is equipped with a wastewater outlet, which leads to the front section of the drying system.
2. The drying and dust collection system for ultrafine titanium concentrate according to claim 1, characterized in that, The dust removal system includes a single-stage cyclone dust collector (6), an electrostatic-bag dust collector (9), and a desulfurization spray tower (11).
3. The drying and dust collection system for ultrafine titanium concentrate according to claim 1, characterized in that, The heat exchange air pipe (7) regulates the exhaust gas temperature by leading a portion of the high-temperature hot air from the outlet of the fluidized bed furnace (2) to the exhaust port of the single-drum dryer (5).
4. The drying and dust collection system for ultrafine titanium concentrate according to claim 1, characterized in that, The electrostatic precipitator (9) has an electrostatic dust removal section and a bag dust removal section arranged sequentially along the airflow direction inside.
5. The drying and dust collection system for ultrafine titanium concentrate according to claim 1, characterized in that, The dust removal fan (10) is installed on the air path between the outlet of the electrostatic bag filter (9) and the inlet of the desulfurization spray tower (11).
6. The drying and dust collection system for ultrafine titanium concentrate according to claim 1, characterized in that, The system does not include a wet electrostatic precipitator.
7. The drying and dust collection system for ultrafine titanium concentrate according to claim 1, characterized in that, The dry titanium concentrate discharge equipment (12) for collecting and conveying dry material from the single-drum dryer (5), cyclone dust collector (6) and electrostatic-bag dust collector (9) is one or a combination of a screw conveyor, scraper conveyor or belt conveyor.
8. The drying and dust collection system for ultrafine titanium concentrate according to claim 1, characterized in that, The electrostatic-bag dust collector (9) is a combined dust removal device. Its interior is provided with an electrostatic dust removal section and a bag dust removal section from front to back. The outlet of the electrostatic dust removal section is connected to the inlet of the bag dust removal section.
9. The drying and dust collection system for ultrafine titanium concentrate according to claim 1, characterized in that, The wastewater outlet of the desulfurization spray tower (11) is connected to the upstream concentration unit via a pipeline.
10. The drying and dust collection system for ultrafine titanium concentrate according to claim 4, characterized in that, The bag filter section of the electrostatic bag filter (9) uses membrane-coated or wear-resistant filter bags.