Printing and dyeing sludge pyrolysis tail gas treatment device

Abstract

The utility model discloses a printing and dyeing sludge pyrolysis tail gas treatment device which is matched with a pyrolysis furnace and a secondary combustion device for use and comprises a first dust removal unit, a condensation unit and a tail gas treatment unit, pyrolyzing furnace tail gas enters the condensation unit through the first dust removal unit, after condensation treatment, residual flue gas enters the secondary combustion device through a pipeline, and tail gas generated by the secondary combustion device enters the tail gas treatment unit. And the first dust removal unit is a cyclone dust collector. The device effectively solves the problem that the water vapor content in the dye sludge pyrolysis tail gas is too high, and the overall energy consumption is improved. The first dust removal unit is arranged in front of the condensation unit, so that the dust content in tail gas can be effectively reduced, and the influence on the condensation unit is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge treatment equipment, in particular to a printing and dyeing sludge pyrolysis tail gas treatment device. Background Art

[0002] Printing and dyeing sludge contains a large amount of chemical residues and a large amount of water. Its composition is very complex and difficult to treat. Incineration and pyrolysis is currently a commonly used treatment method. Since the organic matter in the printing and dyeing sludge is closely combined with the water in the sludge, the moisture content can still reach 70% to 85% after mechanical dehydration. The tail gas produced by pyrolysis and incineration will contain a large amount of water vapor, and a large amount of organic components are also easy to flow out with the water vapor, making the subsequent tail gas treatment process complicated. For example, the tail gas with a large water content is easy to clog the dust bag, etc., and it also causes a lot of energy waste in pyrolysis and incineration. Utility Model Content

[0003] The utility model aims to provide a printing and dyeing sludge pyrolysis tail gas treatment device to solve the problems existing in the prior art.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model provides a printing and dyeing sludge pyrolysis tail gas treatment device, which is used in conjunction with a pyrolysis furnace and a secondary combustion device, and includes a first dust removal unit, a condensation unit, and a tail gas treatment unit; the tail gas of the pyrolysis furnace is introduced into the first dust removal unit through a tail gas pipeline, and enters the condensation unit after being treated by the first dust removal unit. After condensation treatment, the remaining flue gas enters the secondary combustion device through a pipeline, and the tail gas generated by the secondary combustion device enters the tail gas treatment unit. The first dust removal unit is a cyclone dust collector.

[0005] Preferably, an air uniforming duct is provided at the air inlet of the cyclone dust collector, one end of the air uniforming duct is connected to the exhaust duct and the other end is connected to the cyclone dust collector, and a plurality of groups of parallelly arranged air uniforming plates are provided in the air uniforming duct.

[0006] Preferably, the length of the air uniformizing plate is 1 / 2 of the length of the air uniformizing duct, and the length of the air uniformizing duct is greater than 1 m.

[0007] Preferably, a plurality of groups of wear-resistant plates are arranged in the air inlet pipe of the cyclone dust collector, fixing bolts are arranged on the inner side of the wear-resistant plates, through holes are arranged at corresponding positions on the side of the air inlet pipe, and the fixing bolts pass through the through holes on the side of the air inlet pipe and are fixed to the air inlet pipe.

[0008] Preferably, the upper surface of the wear-resistant plate is inclined, and the thickness of the side facing the air inlet is smaller than that of the other side. A groove is provided on the thicker side of the wear-resistant plate near the side area of ​​the air intake pipe, and the depth of the groove is equal to the thickness of the thinner side of the wear-resistant plate. The thinner side of the adjacent wear-resistant plate can be inserted into the groove of the previous wear-resistant plate.

[0009] Preferably, raised blocks are provided at the upper and lower parts of the wear-resistant sheet, and the side of the raised block facing the thinner side of the wear-resistant sheet is inclined toward the airflow direction, and the narrowest width of the raised block is greater than or equal to the thickness of the thicker side of the wear-resistant sheet.

[0010] The utility model can condense the water vapor in the pyrolysis tail gas through the setting of the condensing unit, and the remaining tail gas is introduced into the secondary combustion device through a pipeline for secondary combustion, and then the tail gas is treated, which effectively solves the problem of excessive water vapor content in the pyrolysis tail gas of the dyed sludge and improves the overall energy consumption.

[0011] In terms of specific structure, the first dust removal unit is placed before the condensing unit, which can effectively reduce the dust content in the exhaust gas and reduce the impact on the condensing unit. The first dust removal unit uses a cyclone dust collector for dust removal, which can effectively deal with the problem of excessive water vapor content.

[0012] More specifically, in order to reduce the wear of the cyclone dust collector by solid particles in the exhaust gas, a stacked wear-resistant sheet is provided at the air inlet end of the cyclone dust collector. In order to improve the efficiency of the cyclone dust collection, a uniform wind plate is provided at the air inlet of the cyclone dust collector to reduce turbulence in the air flow and improve the cyclone dust collection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall solution of the utility model.

[0014] Figure 2 It is a three-dimensional schematic diagram of the first dust removal unit of the utility model.

[0015] Figure 3 It is a schematic cross-sectional view of the air intake end of an embodiment of the first dust removal unit of the utility model.

[0016] Figure 4 It is a schematic cross-sectional view of the air intake end of another embodiment of the first dust removal unit of the utility model.

[0017] Figure 5 It is a schematic diagram of the air inlet wear-resistant plate of an embodiment of the first dust removal unit of the utility model.

[0018] Figure 6 It is a partially enlarged schematic diagram of the wear-resistant plate of the air inlet of the first dust removal unit of the utility model.

[0019] Figure 7 It is a schematic diagram of the arrangement of the wear-resistant sheet at the air inlet of the first dust removal unit of the utility model. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] As attached Figure 1 As shown, a printing and dyeing sludge pyrolysis tail gas treatment device involved in the utility model includes a first dust removal unit 1, a condensation unit 2, and a tail gas treatment unit 3.

[0022] The printing and dyeing sludge is pyrolyzed in a pyrolysis furnace, and the exhaust gas generated is introduced into the first dust removal unit 1 through the exhaust gas pipeline after preliminary filtration. After being treated in the first dust removal unit 1, it enters the condensation unit 2. After condensation treatment, the remaining flue gas enters the secondary combustion device through the pipeline, which can be a heating device for the sludge drying device or other devices. The exhaust gas generated by the secondary combustion device enters the exhaust gas treatment unit 3.

[0023] The first dust removal unit 1 is a cyclone dust collector. The condensation unit 2 and the tail gas treatment unit 3 can be conventional devices available on the market.

[0024] As attached Figure 2 , 3 As shown in FIG. 4 , an air uniforming duct 11 is provided at the air inlet of the cyclone dust collector 1 , one end of the air uniforming duct 11 is connected to the exhaust gas duct and the other end is connected to the cyclone dust collector 1 , and a plurality of groups of parallelly arranged air uniforming plates 111 are provided in the air uniforming duct 11 .

[0025] More specifically, the length of the air uniforming plate 111 is 1 / 2 of the length of the air uniforming duct 11, and the length of the air uniforming duct 11 is greater than 1 m. The exhaust gas flowing in from the exhaust pipe forms multiple parallel laminar flows after passing through the air uniforming plate 111, which can effectively reduce the turbulence in the exhaust gas. After that, the multiple parallel laminar flows are mixed in the air uniforming duct 11 and flow into the air inlet of the cyclone dust collector 1, which has little impact on the airflow in the cyclone dust collector 1 and only reduces the turbulence in the airflow flowing into the cyclone dust collector 1.

[0026] As attached Figure 5 , 6 As shown in Figure 7, a plurality of groups of wear-resistant sheets 12 are arranged in the air inlet pipe 10 of the cyclone dust collector 1, and fixing bolts 120 are arranged on the inner side of the wear-resistant sheets. Through holes are arranged at corresponding positions on the side of the air inlet pipe 10, and the fixing bolts 120 pass through the through holes on the side of the air inlet pipe 10 and are fixed to the air inlet pipe 10, so as to reduce the wear of the connecting bolts of the wear-resistant sheets 12 of the cyclone dust collector.

[0027] Adjacent wear-resistant sheets 12 are partially stacked on each other.

[0028] Furthermore, the upper surface of the wear-resistant sheet 12 is inclined, and the upper surface is parallel to the side of the intake pipe 10 and faces the intake pipe 10, and the thickness of the side facing the intake port is smaller than the other side. This can guide the airflow to a certain extent, so that the airflow flowing through the wear-resistant sheet 12 is inclined inward, which has a certain blocking effect on the adjacent airflow, thereby forming a low flow velocity layer close to the side, which is conducive to reducing friction.

[0029] Furthermore, a groove 121 is provided on the thicker side of the wear-resistant sheet 12 near the side area of ​​the intake pipe 10, and the depth of the groove 121 is equal to the thickness of the thinner side of the wear-resistant sheet 12, and the thinner side of the adjacent wear-resistant sheet 12 can be inserted into the groove 121 of the previous wear-resistant sheet 12. The above arrangement can effectively reduce the wear caused by the gaps in the arrangement of the wear-resistant sheet 12.

[0030] Furthermore, in actual production, due to cost constraints, it is difficult for the wear-resistant sheet 12 to completely match the height of the intake pipe 10. Although a better match can be achieved through on-site grinding, it is impossible to prevent the appearance of gaps at the edges. Therefore, raised blocks 122 are provided at the upper and lower parts of the wear-resistant sheet 12. The raised blocks 122 are inclined toward the side of the thinner side of the wear-resistant sheet 12, and are specifically inclined toward the direction of airflow, thereby achieving a certain guiding effect and changing the direction of airflow at the gap. The width of the narrowest part of the raised block 122 is greater than or equal to the thickness of the thicker side of the wear-resistant sheet 12, and the height of the raised block 122 is 3-10mm. The distance between the raised blocks 122 is greater than the width of the raised blocks 122, preferably 2-5 times the width. Too many raised blocks 122 will increase the grinding workload of on-site workers on the one hand, and will not be able to achieve a guiding effect on the other hand.

[0031] It should be noted that, unless otherwise clearly specified and limited, the terms such as "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

Claims

1. A printing and dyeing sludge pyrolysis tail gas treatment device, used in conjunction with a pyrolysis furnace and a secondary combustion device, characterized in that: It includes a first dust removal unit, a condensation unit, and a tail gas treatment unit; the tail gas from the pyrolysis furnace is introduced into the first dust removal unit through the tail gas pipeline, and enters the condensation unit after being treated by the first dust removal unit. After the condensation treatment, the remaining flue gas enters the secondary combustion device through the pipeline, and the tail gas generated by the secondary combustion device enters the tail gas treatment unit; the first dust removal unit is a cyclone dust collector; an air uniforming duct is arranged at the air inlet of the cyclone dust collector, one end of the air uniforming duct is connected to the tail gas pipeline and the other end is connected to the cyclone dust collector, and a plurality of groups of parallel arranged air uniforming plates are arranged in the air uniforming duct.

2. According to claim 1, a printing and dyeing sludge pyrolysis tail gas treatment device is characterized in that: The length of the air uniforming plate is 1 / 2 of the length of the air uniforming duct, and the length of the air uniforming duct is greater than 1m.

3. The printing and dyeing sludge pyrolysis tail gas treatment device according to claim 1, characterized in that: A plurality of groups of wear-resistant sheets are arranged in the air inlet pipe of the cyclone dust collector, fixing bolts are arranged on the inner side of the wear-resistant sheets, through holes are arranged at corresponding positions on the side of the air inlet pipe, and the fixing bolts pass through the through holes on the side of the air inlet pipe and are fixed to the air inlet pipe.

4. A printing and dyeing sludge pyrolysis tail gas treatment device according to claim 3, characterized in that: The upper surface of the wear-resistant plate is inclined, and the thickness of the side facing the air inlet is smaller than that of the other side. A groove is provided on the thicker side of the wear-resistant plate near the side area of ​​the air intake pipe, and the depth of the groove is equal to the thickness of the thinner side of the wear-resistant plate. The thinner side of the adjacent wear-resistant plate can be inserted into the groove of the previous wear-resistant plate.

5. The printing and dyeing sludge pyrolysis tail gas treatment device according to claim 3, characterized in that: The upper and lower parts of the wear-resistant sheet are provided with raised blocks, which are inclined toward the airflow direction on the side facing the thinner side of the wear-resistant sheet, and the narrowest width of the raised block is greater than or equal to the thickness of the thicker side of the wear-resistant sheet.

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