Multi-stage filtration tail gas treatment equipment

Abstract

The multi-stage filtration tail gas treatment equipment comprises a condenser, a first-stage filter, a second-stage filter, a third-stage filter, an induced draft fan and a smoke exhaust tower which are communicated in sequence, the condenser is provided with a discharge port for discharging tail gas to be filtered, and the smoke discharge tower is provided with a discharge port for discharging filtered tail gas; each of the first-stage filter, the second-stage filter and the third-stage filter comprises a tower body, the tower body is provided with an inner cavity, an annular pipe I, a rotating device, a filter layer I and a filter layer II are arranged in the inner cavity, the annular pipe I is fixed on the inner wall of the inner cavity, a plurality of nozzles are arranged on the annular pipe I at intervals, the annular pipe I is connected with a circulating water tank, and alkali liquor is filled in the circulating water tank; the rotating device comprises a rotating shaft and a plurality of rotating blades arranged on the rotating shaft, a through hole allowing the rotating shaft to penetrate through is formed in the middle of the first filtering layer, the first annular pipe is arranged over the first filtering layer, and the second filtering layer is arranged over the rotating shaft; the tail gas can be simultaneously subjected to multiple times of alkali liquor reaction and filtration by adding the same filter.

Description

Technical Field

[0001] The present application relates to the technical field of tail gas treatment, and in particular to a multi-stage filtering tail gas treatment device. Background Art

[0002] In the prior art, there are many types of exhaust filters, which generally treat exhaust gas by spraying alkali solution or filtering through a filter layer. They have a single function. If multiple filtrations are to be performed, multiple filters with different functions need to be installed. If one function needs to be performed multiple times (such as filter layer filtration), multiple identical filters need to be installed. If multiple functions need to be performed multiple times, more filters are required, resulting in a large footprint and high cost. Utility Model Content

[0003] Based on this, it is necessary to provide a multi-stage filtering tail gas treatment equipment, including a condenser, a primary filter, a secondary filter, a tertiary filter, an induced draft fan, and a smoke exhaust tower connected in sequence; the condenser is provided with an inlet for the tail gas to be filtered to be discharged, and the smoke exhaust tower is provided with an outlet for the filtered tail gas to be discharged;

[0004] The primary filter, the secondary filter and the tertiary filter all include a tower body, the tower body has an inner cavity, the inner cavity is provided with a ring tube 1, a rotating device, a filter layer 1 and a filter layer 2, the ring tube 1 is fixed on the inner wall of the inner cavity, a plurality of nozzles are arranged on the ring tube 1 at intervals, the ring tube 1 is connected to a circulating water tank, and the circulating water tank is filled with alkali solution; the rotating device includes a rotating shaft and a plurality of rotating blades arranged on the rotating shaft, a through hole for the rotating shaft to pass through is provided in the middle of the filter layer 1, the ring tube 1 is arranged directly above the filter layer 1, and the filter layer 2 is arranged above the rotating shaft.

[0005] The primary filter, the secondary filter, the tertiary filter and the induced draft fan all include an air inlet and an air outlet. The condenser is also provided with an air outlet. The air outlet of the condenser is connected to the air inlet of the primary filter through a vent pipe, the air outlet of the primary filter is connected to the air inlet of the secondary filter through a vent pipe, the air outlet of the secondary filter is connected to the air inlet of the tertiary filter through a vent pipe, the air outlet of the tertiary filter is connected to the air inlet of the induced draft fan through a vent pipe, and the air outlet of the induced draft fan is connected to the smoke exhaust tower through a vent pipe.

[0006] The air outlets and air inlets of the primary filter, the secondary filter and the tertiary filter are all arranged at the upper end and the lower end of the primary filter, the secondary filter and the tertiary filter.

[0007] The rotating device comprises a rotating motor, which is arranged at the bottom of the tower body. The lower end of the rotating shaft is connected to the rotating motor, and the upper end of the rotating shaft extends upward.

[0008] The plurality of rotating blades are arranged at intervals along the length direction of the rotating shaft, and the filter layer is arranged at intervals between two adjacent rotating blades.

[0009] A plurality of filter layers 1 arranged at intervals are arranged in the inner cavity.

[0010] The filter layer is arranged tilted.

[0011] A second annular pipe is also arranged in the inner cavity, and the second annular pipe is connected to the ventilation pipe connected to the air inlet; a plurality of nozzles are arranged at intervals on the second annular pipe.

[0012] A slot is provided at the bottom of the tower body, the slot is communicated with the inner cavity, the rotating motor is installed in the slot, the rotating shaft connected to the rotating motor extends into the inner cavity, a rubber waterproof strip is provided at the position where the slot and the inner cavity are connected, and the rubber waterproof strip extends in the direction of the rotating shaft.

[0013] The rotating shaft is located on the central axis of the inner cavity; along the direction from the rotating shaft to the side wall of the inner cavity, the bottom surface of the inner cavity is arranged to be inclined downward, and a circulation pipe is provided on the tower body, one end of the circulation pipe is connected to the inner cavity, and the other end is connected to the circulation water tank.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] The utility model provides a multi-stage filtering exhaust gas treatment equipment. The multi-stage filtering exhaust gas treatment equipment passes the exhaust gas to be filtered into a condenser through an exhaust inlet for cooling, and then enters the primary filter, the secondary filter, and the tertiary filter in sequence for filtering. The rotating shaft in the tower body drives the rotating blades to rotate. After the exhaust gas enters the tower body, it is driven to rotate by the rotating blades and spirally rises, thereby extending the rising distance of the exhaust gas, so that the exhaust gas stays in the tower for a longer time, thereby increasing the probability of the exhaust gas contacting with the alkali solution, and making the exhaust gas and the alkali solution react more fully. The exhaust gas is filtered through the filter layer one to separate the particles in the exhaust gas from the exhaust gas, and the filter layer two performs secondary filtering, which can avoid the outflow of unfiltered exhaust gas flowing out of the gap between the through hole of the filter layer one and the rotating shaft, so that the filtering effect is better; and each filter is provided with an alkali solution spray and a filter layer one and a filter layer two. By adding the same filter, the exhaust gas can be subjected to multiple alkali solution reactions and filtrations at the same time, which saves more space and cost compared with the traditional method of placing several filters for each function. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a multi-stage filtering exhaust gas treatment device according to an embodiment of the present application;

[0018] Figure 2 Schematic diagram of the internal structure of the tower body of the embodiment of the present application.

[0019] Description of reference numerals:

[0020] 1. Condenser; 2. Primary filter; 3. Secondary filter; 4. Tertiary filter; 5. induced draft fan; 6. Smoke exhaust tower; 7. Tower body; 70. Inner cavity; 8. Ring pipe 1; 9. Rotating device; 90. Rotating motor; 91. Rotating shaft; 92. Rotating blades; 10. Filter layer 1; 11. Filter layer 2; 12. Nozzle; 13. Circulating water tank; 14. Ventilation pipe; 15. Ring pipe 2; 16. Nozzle; 17. Circulating pipe. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0022] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] It should be noted that when an element is referred to as being "fixed to" or "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", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0027] A multi-stage filtering tail gas treatment device comprises a condenser 1, a primary filter 2, a secondary filter 3, a tertiary filter 4, an induced draft fan 5, and a smoke exhaust tower 6 which are connected in sequence; the condenser 1 is provided with an inlet for exhaust gas to be filtered, and the smoke exhaust tower 6 is provided with an outlet for exhaust gas that has been filtered;

[0028] The primary filter 2, the secondary filter 3 and the tertiary filter 4 all include a tower body 7, which has an inner cavity 70, in which a ring tube 8, a rotating device 9, a filter layer 10 and a filter layer 2 11 are arranged, the ring tube 8 is fixed on the inner wall of the inner cavity 70, a plurality of nozzles 12 are arranged at intervals on the ring tube 8, the ring tube 8 is connected to a circulating water tank 13, and the circulating water tank 13 is filled with alkali solution; the rotating device 9 includes a rotating shaft 91 and a plurality of rotating blades 92 arranged on the rotating shaft 91, a through hole for the rotating shaft 91 to pass through is provided in the middle of the filter layer 10, the ring tube 8 is arranged directly above the filter layer 10, and the filter layer 2 11 is arranged above the rotating shaft 91.

[0029] The multi-stage filtering tail gas treatment equipment passes the tail gas to be filtered into the condenser 1 through the exhaust inlet for cooling, and then enters the primary filter 2, the secondary filter 3, and the tertiary filter 4 in sequence for filtering. The rotating shaft 91 in the tower body 7 drives the rotating blades 92 to rotate. After the tail gas enters the tower body 7, it is driven to rotate by the rotating blades 92 and spirally rises, extending the rising distance of the tail gas, so that the tail gas stays in the tower for a longer time, thereby increasing the probability of the tail gas contacting the alkali solution and making the tail gas and the alkali solution react more fully. The tail gas passes through the filter layer 10 for filtering, and the particles in the tail gas are separated from the tail gas. The filter layer 2 11 performs secondary filtering, which can avoid the outflow of unfiltered tail gas flowing out of the gap between the through hole of the filter layer 10 and the rotating shaft 91, so that the filtering effect is better; and each filter is provided with alkali solution spraying and the filter layer 10 and the filter layer 2 11. By adding the same filter, the tail gas can be subjected to multiple alkali solution reactions and filtrations at the same time, which saves more space and cost compared with the traditional method of placing several filters for each function.

[0030] In the utility model, the primary filter 2, the secondary filter 3, the tertiary filter 4 and the induced draft fan 5 all include an air inlet and an air outlet, and the air outlets of the primary filter 2, the secondary filter 3 and the tertiary filter 4 are all arranged at the upper ends of the primary filter 2, the secondary filter 3 and the tertiary filter 4, and the air inlet is arranged at the lower ends of the primary filter 2, the secondary filter 3 and the tertiary filter 4. The condenser 1 is also provided with an air outlet, and the air outlet of the condenser 1 is connected to the air inlet of the primary filter 2 through the vent pipe 14, the air outlet of the primary filter 2 is connected to the air inlet of the secondary filter 3 through the vent pipe 14, the air outlet of the secondary filter 3 is connected to the air inlet of the tertiary filter 4 through the vent pipe 14, the air outlet of the tertiary filter 4 is connected to the air inlet of the induced draft fan 5 through the vent pipe 14, and the air outlet of the induced draft fan 5 is connected to the smoke exhaust tower 6 through the vent pipe 14.

[0031] In the utility model, the rotating device 9 includes a rotating motor 90, which is arranged at the bottom of the tower body 7. The lower end of the rotating shaft 91 is connected to the rotating motor 90, and the upper end of the rotating shaft 91 extends upward. The rotating motor 90 drives the rotating shaft 91 to rotate, and the rotating shaft 91 drives the rotating blades 92 to rotate. The rotating blades 92 drive the exhaust gas entering from the air inlet to rotate and rise, so that the rising path of the exhaust gas is extended, thereby extending the residence time of the exhaust gas, so that the exhaust gas and the alkali solution are fully reacted.

[0032] In the utility model, a plurality of rotating blades 92 are arranged at intervals along the length direction of the rotating shaft 91. In this embodiment, a plurality of filter layers 10 are provided so that the exhaust gas can be filtered multiple times. The plurality of filter layers 10 are arranged at intervals between two adjacent rotating blades 92 to prevent the filter layers 10 from affecting the rotation of the rotating blades 92.

[0033] In the present invention, the filter layer 10 is arranged obliquely, which can increase the area of ​​the filter layer 10, make the exhaust gas filtering smoother, and avoid the filtered particles docking at one position, which affects the filtering speed.

[0034] In the utility model, a second annular tube 15 is provided in the inner cavity 70, and a plurality of nozzles 16 are provided on the second annular tube 15. The second annular tube 15 is connected to the vent pipe 14 connected to the air inlet. The exhaust gas to be filtered enters the second annular tube 15 and is ejected from the nozzle 16, so that the exhaust gas is dispersed in the inner cavity 70, which is convenient for the rotating blades 92 to drive the exhaust gas to rotate, and also convenient for the exhaust gas to fully react with the alkali solution.

[0035] In the utility model, a slot is provided at the bottom of the tower body 7 for installing the rotating motor 90, the slot is connected with the inner cavity 70, the rotating shaft 91 is located on the central axis of the inner cavity 70, and the bottom surface of the inner cavity 70 is arranged to be tilted downward along the direction from the rotating shaft 91 to the side wall of the inner cavity 70, and a circulation pipe 17 is provided on the side wall of the tower body 7, one end of the circulation pipe 17 is connected to the inner cavity 70, and the other end is connected to the circulating water tank 13. The alkali liquid falling to the bottom surface of the inner cavity 70 can flow along the middle of the bottom surface toward both sides (that is, toward the side wall of the inner cavity 70), so as to avoid excessive alkali liquid flowing into the slot and affecting the service life of the rotating motor 90, and the alkali liquid can be collected and flowed into the circulating water tank 13 along the circulation pipe 17, so as to facilitate the recycling of the alkali liquid.

[0036] In the utility model, a rubber waterproof strip is provided at the position where the slot and the inner cavity 70 are connected. The rubber waterproof strip extends toward the direction of the rotating shaft 91 to prevent alkali liquid from entering the slot. The rubber waterproof strip is made of rubber, which can reduce the impact on the rotation of the rotating shaft 91.

[0037] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A multi-stage filtration tail gas treatment equipment, characterized in that: It comprises a condenser, a primary filter, a secondary filter, a tertiary filter, an induced draft fan, and a smoke exhaust tower which are connected in sequence; the condenser is provided with an inlet for exhaust gas to be filtered, and the smoke exhaust tower is provided with an outlet for exhaust gas which has been filtered; The primary filter, the secondary filter and the tertiary filter all include a tower body, the tower body has an inner cavity, the inner cavity is provided with a ring tube 1, a rotating device, a filter layer 1 and a filter layer 2, the ring tube 1 is fixed on the inner wall of the inner cavity, a plurality of nozzles are arranged on the ring tube 1 at intervals, the ring tube 1 is connected to a circulating water tank, and the circulating water tank is filled with alkali solution; the rotating device includes a rotating shaft and a plurality of rotating blades arranged on the rotating shaft, a through hole for the rotating shaft to pass through is provided in the middle of the filter layer 1, the ring tube 1 is arranged directly above the filter layer 1, and the filter layer 2 is arranged above the rotating shaft.

2. A multi-stage filtration tail gas treatment equipment according to claim 1, characterized in that: The primary filter, the secondary filter, the tertiary filter and the induced draft fan all include an air inlet and an air outlet. The condenser is also provided with an air outlet. The air outlet of the condenser is connected to the air inlet of the primary filter through a vent pipe, the air outlet of the primary filter is connected to the air inlet of the secondary filter through a vent pipe, the air outlet of the secondary filter is connected to the air inlet of the tertiary filter through a vent pipe, the air outlet of the tertiary filter is connected to the air inlet of the induced draft fan through a vent pipe, and the air outlet of the induced draft fan is connected to the smoke exhaust tower through a vent pipe.

3. A multi-stage filtration tail gas treatment equipment according to claim 2, characterized in that: The air outlets and air inlets of the primary filter, the secondary filter and the tertiary filter are all arranged at the upper end and the lower end of the primary filter, the secondary filter and the tertiary filter.

4. The multi-stage filtration tail gas treatment equipment according to claim 1, characterized in that: The rotating device comprises a rotating motor, which is arranged at the bottom of the tower body. The lower end of the rotating shaft is connected to the rotating motor, and the upper end of the rotating shaft extends upward.

5. The multi-stage filtration tail gas treatment equipment according to claim 4, characterized in that: The plurality of rotating blades are arranged at intervals along the length direction of the rotating shaft, and the filter layer is arranged at intervals between two adjacent rotating blades.

6. The multi-stage filtration tail gas treatment equipment according to claim 5, characterized in that: A plurality of filter layers 1 arranged at intervals are arranged in the inner cavity.

7. The multi-stage filtration tail gas treatment equipment according to claim 6, characterized in that: The filter layer is arranged inclinedly.

8. The multi-stage filtration tail gas treatment equipment according to claim 2, characterized in that: A second annular pipe is also arranged in the inner cavity, and the second annular pipe is connected to the ventilation pipe connected to the air inlet; a plurality of nozzles are arranged at intervals on the second annular pipe.

9. The multi-stage filtration tail gas treatment equipment according to claim 4, characterized in that: A slot is provided at the bottom of the tower body, the slot is communicated with the inner cavity, the rotating motor is installed in the slot, the rotating shaft connected to the rotating motor extends into the inner cavity, a rubber waterproof strip is provided at the position where the slot and the inner cavity are connected, and the rubber waterproof strip extends in the direction of the rotating shaft.

10. The multi-stage filtration tail gas treatment equipment according to claim 9, characterized in that: The rotating shaft is located on the central axis of the inner cavity; along the direction from the rotating shaft to the side wall of the inner cavity, the bottom surface of the inner cavity is arranged to be inclined downward, and a circulation pipe is provided on the tower body, one end of the circulation pipe is connected to the inner cavity, and the other end is connected to the circulating water tank.

Images