Bag-type dust collector for high-temperature and high-humidity dusty waste gas

Abstract

The utility model provides a bag-type dust collector for high-temperature and high-humidity dust-containing waste gas, which is characterized in that a heater is arranged at the front end of an injection pipeline and is used for heating injection gas; the blowing pipe comprises a dust remover external pipeline and a dust remover internal pipeline, an electric heat tracing sleeve is arranged at the intersection of the dust remover external pipeline and the dust remover internal pipeline, and the electric heat tracing sleeve is used for electrically heating the blowing pipe to prevent the surface of the blowing pipe from dewing; a dust remover body electric heat tracing is arranged on the equipment main body, and the dust remover body electric heat tracing is used for heating the equipment main body during cold start. The bag-type dust collector solves the problem that equipment corrosion spots exist when the bag-type dust collector is used for treating high-temperature and high-humidity dust-containing waste gas.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, and in particular to a bag dust collector for high-temperature and high-humidity dust-containing waste gas. Background Art

[0002] Pulse bag dust collector has the advantages of high purification efficiency, large gas treatment capacity, stable performance, long filter bag life, easy operation, and small maintenance workload. With my country's emphasis on the environment, pulse bag dust collectors are widely used in industrial waste gas treatment. The dust-containing flue gas emitted by equipment such as activated carbon regeneration furnaces and hazardous waste post-treatment quenching towers has a high temperature and is accompanied by a large amount of water vapor or acidic gases such as sulfur oxides. For this type of high-temperature, high-humidity dust-containing exhaust gas, when using a pulse bag dust collector, some areas inside the equipment are prone to condensation due to low temperature, thereby causing corrosion to the metal equipment body and kits.

[0003] At present, the main corrosion points of relevant equipment during operation include: (1) The temperature at the connection of the metal blowing pipes inside and outside the equipment is low, and condensation forms on the pipe surface to dissolve the acidic exhaust gas and cause corrosion; (2) The mass transfer and heat transfer rates on the inner wall of the dust collector are low, resulting in condensation, which causes corrosion to the metal equipment body; (3) The low internal temperature of the dust collector during cold start-up causes condensation corrosion due to exhaust gas.

[0004] After searching, the Chinese utility model patent with the authorization announcement number CN218944591U discloses a self-heating spray device for high-temperature bag dust removal, which includes a clean air chamber, multiple groups of spray pipes are arranged in the clean air chamber, the spray pipes are connected to the pulse valve through a connecting pipe, an air bag is arranged between the connecting pipe and the pulse valve, an air inlet pipe is arranged on one side of the air bag, and an air inlet valve is arranged on the air inlet pipe; a sewage pipe is arranged on the other side of the air bag, the bottom end of the sewage pipe extends into the bottom of the air bag outside the connecting pipe, and the top end of the sewage pipe extends out of the air bag and is connected to the sewage valve. The self-heating spray device for high-temperature bag dust removal can reduce the temperature difference between the spray gas and the dust collector flue gas, but its structure is complicated and inconvenient to install, and there are still problems of corrosion to the metal equipment body and condensation corrosion of the exhaust gas caused by the cold start of the dust collector.

[0005] Therefore, it is necessary to improve the existing pulse bag dust collector to solve at least one of the above problems. Utility Model Content

[0006] In view of the defects in the prior art, the purpose of the utility model is to provide a bag dust collector for high-temperature and high-humidity dust-containing exhaust gas.

[0007] The utility model is realized by the following technical solutions:

[0008] According to one aspect of the utility model, a bag dust collector for high-temperature and high-humidity dust-containing exhaust gas is provided, wherein a heater is provided at the front end of the spray pipeline, and the heater is used to heat the spray gas; the spray pipe comprises an external pipeline of the dust collector and an internal pipeline of the dust collector, and an electric heating sleeve is provided at the intersection of the external pipeline of the dust collector and the internal pipeline of the dust collector, and the electric heating sleeve electrically heats the spray pipe to prevent condensation on the surface of the spray pipe; the dust collector body electric heating is provided on the equipment body, and the dust collector body electric heating heats the equipment body during cold start.

[0009] Optionally, the heater is an electric heater.

[0010] Optionally, the electric heating sleeve and the blowing pipe form an integral structure.

[0011] Optionally, the electric heating sleeve includes a blowing sleeve electric heating and a sleeve, and the blowing sleeve electric heating is laid between the sleeve and the blowing pipe.

[0012] Optionally, a casing insulation layer is provided between the blowing casing electric heating and the casing.

[0013] Optionally, the sleeve insulation layer adopts a heat insulation cotton layer.

[0014] Optionally, one end of the electric heating sleeve is located inside the device body, and the other end is located outside the device body.

[0015] Optionally, the electric heating of the dust collector body is applied to the outer surface of the shell of the equipment body.

[0016] Optionally, the inner wall of the shell of the equipment body is provided with a castable lining.

[0017] Compared with the prior art, the utility model has at least one of the following beneficial effects:

[0018] The bag dust collector provided by the utility model heats the compressed air as needed through a heater, and heats the blowing pipe through a blowing heating sleeve to prevent condensation on its surface; the dust collector body heating can heat the equipment body as needed during cold start, thereby solving the problem of equipment corrosion points when the bag dust collector processes high-temperature and high-humidity dust-containing exhaust gas, and the equipment has a simple structure and is easy to disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of a bag filter for high-temperature, high-humidity, dust-containing exhaust gas in one embodiment of the utility model;

[0021] Figure 2 This is a structural schematic diagram of the connection structure between the spray pipeline and the equipment in one embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of an electric heating sleeve in one embodiment of the utility model;

[0023] Figure 4 It is a side view schematic diagram of an electric heating sleeve in one embodiment of the utility model.

[0024] In the figure: 1 is a heater, 2 is an electric heating sleeve, 3 is an equipment body, 4 is a blowing pipe, 5 is a sleeve insulation layer, 6 is an electric heating of the blowing sleeve, 7 is an electric heating of the dust collector body, 8 is a castable lining, 9 is a sleeve, and 10 is an intermediate heating layer. DETAILED DESCRIPTION

[0025] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the utility model. These all fall within the scope of protection of the utility model.

[0026] The utility model provides a bag dust collector for high temperature and high humidity dust-containing exhaust gas, referring to Figure 1 The bag dust collector is provided with a heater 1 at the front end of the spray pipeline, and the heater 1 is used to heat the spray gas; the spray pipe includes an external pipeline of the dust collector and an internal pipeline of the dust collector, and an electric heating sleeve 2 (i.e., the spray heating sleeve) is provided at the intersection of the external pipeline of the dust collector and the internal pipeline of the dust collector, and the electric heating sleeve 2 electrically heats the spray pipe to prevent condensation on the surface of the spray pipe; the dust collector body electric heating 7 is provided on the equipment body 3, and the dust collector body electric heating 7 heats the equipment body 3 during cold start.

[0027] The bag dust collector in the embodiment of the utility model heats the compressed air as needed through the heater 1, heats the external pipeline of the dust collector and the internal pipeline of the dust collector at the same time through the electric heating sleeve 2, and adopts electric heating at the connection of the injection pipe, so as to maintain the temperature of the injection gas and the internal pipeline to prevent condensation on the surface; the dust collector body heating 7 can heat the equipment body 3 as needed during cold start, thereby solving the problem of equipment corrosion points when the bag dust collector processes high-temperature and high-humidity dust-containing exhaust gas, and the equipment has a simple structure and is easy to disassemble.

[0028] The heater 1 at the front end of the injection pipeline can heat the compressed air as needed, so as to adjust the injection temperature according to the injection temperature requirements, and avoid the phenomenon that the surface of the pipeline is corroded by condensation and dissolution of acidic waste gas due to the low temperature at the connection of the metal injection pipeline inside and outside the equipment; in some embodiments, the heater 1 adopts an electric heater, which has a small size, high heating power, high temperature control accuracy, and has the advantages of high efficiency, energy saving, and environmental protection.

[0029] Exemplarily, the electric heater is a tubular electric heater so as to adjust the injection air temperature according to the injection temperature requirement.

[0030] Reference Figure 2-Figure 4 The blowing pipe 4 is directly inserted into the equipment body 3, and the electric heating sleeve 2 is located at the connection position between the blowing pipe 4 and the equipment body 3. In some embodiments, the electric heating sleeve 2 includes a blowing sleeve electric heating 6 and a sleeve 9. The blowing sleeve electric heating 6 is laid between the sleeve 9 and the blowing pipe 4, and an intermediate heating layer 10 is formed between the blowing pipe 4 and the sleeve 9. The blowing sleeve electric heating 6 can heat the blowing pipe 4 according to the exhaust gas temperature and the condensation temperature of the exhaust gas components, thereby preventing condensation on the surface of the blowing pipe 4 through electric heating.

[0031] In order to achieve a good thermal insulation effect, in some embodiments, a casing insulation layer 5 is provided between the spray casing electric heating 6 and the casing 9 .

[0032] Exemplarily, the sleeve insulation layer 5 adopts an insulation cotton layer, which has the characteristics of high temperature resistance, non-flammability, low thermal conductivity, etc., and can effectively improve the insulation performance, heating efficiency and safety of the electric heating sleeve 2.

[0033] In some embodiments, the electric heating sleeve 2 and the blowing pipe 4 form an integral structure. The sizes of the electric heating sleeve 2 and the blowing pipeline are designed according to specific working conditions, which can provide more wiring space for the electric heating of the electric heating sleeve 2, so that the electric heating sleeve 2 can heat the blowing pipe on demand.

[0034] In some embodiments, one end of the electric heating sleeve 2 is located inside the device body 3, and the other end is located outside the device body 3. The structural design of the electric heating sleeve 2 can provide wiring space for electric heating, and facilitate the maintenance of the spray pipeline inside the device body 3.

[0035] In the above-mentioned embodiment of the utility model, the spray pipe 4 is heated by the electric heating sleeve 2, so that the surface of the inner and outer connection of the dust collector spray pipeline is always kept dry, which solves the problem of low local temperature at the connection of the spray pipeline of the dust collector body caused by slow mass and heat transfer between the low-temperature spray gas and the internal spray pipeline of the dust collector.

[0036] The electric heating 7 of the dust collector body can heat the equipment body 3 as needed during cold start. In some embodiments, the electric heating 7 of the dust collector body is applied to the outer surface of the shell of the equipment body 3. To further improve the heating effect, an insulation layer is provided on the outside of the electric heating 7 of the dust collector body, thereby solving the problem of exhaust gas condensation caused by the low temperature inside the dust collector during cold start.

[0037] In order to avoid direct contact between the condensation of waste acidic gas and the metal equipment body 3, in some embodiments, the inner wall of the shell of the equipment body 3 is provided with a castable lining 8, and the castable lining 8 adopts a high temperature resistant and corrosion resistant castable lining. For example, the castable lining 8 can be realized by the technology in the patent with application number 202320491256.1. The castable lining is a material formed of refractory material, which has the advantages of high temperature stability, good thermal insulation performance, excellent corrosion resistance, etc. It is arranged on the inner wall of the dust collector equipment body 3, which can avoid direct contact between the condensation of waste gas and the dissolved acidic gas and the metal equipment body, thereby solving the problem of condensation corrosion of waste gas on the inner wall of the dust collector equipment body.

[0038] Those skilled in the art will appreciate that the bag dust collector in the above-mentioned embodiment of the utility model also includes components of conventional pulse bag dust collectors such as a clamping plate assembly, a pentagonal insulation inspection door, a flange interface, a clamping assembly, a top cover, a handwheel plug-in ash discharge valve, and a bottom bucket, which will not be described in detail here.

[0039] In the bag dust collector provided by the above embodiment of the utility model, the heater 1 can adjust the heating temperature of the compressed air as needed, and the electric heating sleeve 2 can heat the spray pipe according to the exhaust gas temperature and the condensation temperature of the exhaust gas components, so that the surfaces of the inner and outer joints of the dust collector spray pipe are always kept dry; the dust collector equipment body adopts the dust collector body electric heating 7, which is preheated during cold start to prevent condensation of the exhaust gas; the above embodiment of the utility model solves the problem of corrosion points in the bag dust collector when processing high-temperature and high-humidity dust-containing exhaust gas. The equipment has a simple structure and is easy to disassemble. The heating temperature can be adjusted as needed, and it is convenient and flexible to use.

[0040] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various modifications or variations within the scope of the claims, which does not affect the essence of the present invention.

Claims

1. A bag filter for high temperature and high humidity dusty exhaust gas, characterized in that: A heater is provided at the front end of the spray pipeline, and the heater is used to heat the spray gas; the spray pipe includes an external pipeline of the dust collector and an internal pipeline of the dust collector, and an electric heating sleeve is provided at the intersection of the external pipeline of the dust collector and the internal pipeline of the dust collector, and the electric heating sleeve electrically heats the spray pipe to prevent condensation on the surface of the spray pipe; the dust collector body electric heating is provided on the equipment body, and the dust collector body electric heating heats the equipment body during cold start.

2. The bag filter for high-temperature and high-humidity dust-containing exhaust gas according to claim 1 is characterized in that: The heater is an electric heater.

3. The bag filter for high-temperature and high-humidity dust-containing exhaust gas according to claim 1, characterized in that: The electric heating sleeve and the blowing pipe form an integral structure.

4. The bag filter for high-temperature and high-humidity dust-containing exhaust gas according to claim 1, characterized in that: The electric heating sleeve comprises a blowing sleeve electric heating and a sleeve, and the blowing sleeve electric heating is arranged between the sleeve and the blowing pipe.

5. The bag filter for high-temperature and high-humidity dust-containing exhaust gas according to claim 4, characterized in that: A casing heat insulation layer is provided between the injection casing electric heating and the casing.

6. The bag filter for high-temperature and high-humidity dust-containing exhaust gas according to claim 5, characterized in that: The sleeve heat insulation layer adopts a heat insulation cotton layer.

7. The bag filter for high-temperature and high-humidity dust-containing exhaust gas according to claim 1, characterized in that: One end of the electric heating sleeve is located inside the equipment body, and the other end is located outside the equipment body.

8. The bag filter for high-temperature and high-humidity dust-containing exhaust gas according to claim 1, characterized in that: The electric heating of the dust collector body is applied on the outer surface of the shell of the equipment body.

9. The bag filter for high-temperature and high-humidity dust-containing exhaust gas according to claim 1, characterized in that: The inner wall of the shell of the equipment body is provided with a casting material lining.

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