A multi-stage waste gas treatment device for coated sand production

Abstract

The utility model discloses a kind of multistage treatment devices for waste gas in coated sand production, from left to right sequentially include first grade fling barrel dust collector, secondary spray tower, tertiary activated carbon adsorption device and suction fan;First grade fling barrel dust collector includes base, outer cover is set on base, centrifugal fling barrel is set in outer cover, drive motor is set on base, the output shaft of drive motor is connected with driving gear, driving gear is engaged with the lower end of intermediate gear strip of centrifugal fling barrel outer circle Meshing connection, the upper end of intermediate gear strip is engaged with the driven gear of upper end in outer cover Meshing connection;The passage mouth of left and right ends on centrifugal fling barrel is connected with corresponding ventilation pipe respectively through sealing rotary coupling;The utility model carries out multistage pertinence treatment to waste gas generated in coated sand production process, and centrifugal fling cylinder device is added in the head section of waste gas discharge, so that most dust particle solid impurities can be flung out in the initial section of discharge, so that subsequent waste gas treatment effect is better.

Description

Technical Field

[0001] This utility model relates to the technical field of coated sand production equipment, and in particular to a multi-stage waste gas treatment device for coated sand production. Background Technology

[0002] In the production process of coated sand, the main components of the exhaust gas come from the pretreatment of raw sand, resin coating, and curing reaction. The types of pollutants and their generation mechanisms are as follows: particulate solid impurities (most of which are harmful to the human body) during the crushing, screening, and transportation of raw sand; formaldehyde, phenol, and methanol volatilized from the heated resin (such as phenolic resin and furan resin); and hydrogen sulfide (H2S) and sulfur dioxide (SO2) released from the resin curing reaction.

[0003] Conventional exhaust gas extraction devices are generally designed for the treatment of all gases. However, they lack a timely treatment method in the initial stage of extraction for mixed exhaust gases containing a large number of obviously harmful particulate solid impurities, posing a safety hazard and requiring improvement. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a multi-stage waste gas treatment device for coated sand production in order to overcome the shortcomings of the existing technology.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a multi-stage waste gas treatment device for coated sand production, which includes, from left to right, a primary dust removal device, a secondary spray tower, a tertiary activated carbon adsorption device and a suction fan; the primary dust removal device, the secondary spray tower, the tertiary activated carbon adsorption device and the suction fan are connected by a ventilation pipe.

[0006] The primary centrifugal dust collector includes a base, an outer cover on the base, a centrifugal centrifugal drum inside the outer cover, a drive motor on the base, a drive gear connected to the output shaft of the drive motor, the drive gear meshing with the lower end of the middle gear rack on the outer ring of the centrifugal centrifugal drum, and the upper end of the middle gear rack meshing with the driven gear at the upper end inside the outer cover; the channel openings at the left and right ends of the centrifugal centrifugal drum are respectively connected to corresponding ventilation pipes through sealed rotary couplings.

[0007] The side wall of the centrifugal spinning drum has a mesh structure, and the outer cover is fitted with a bag for collecting particulate solid impurities.

[0008] By adopting the above technical solution, the addition of a centrifugal swirl can remove the vast majority of dust particles and solid impurities in the initial stage of exhaust gas discharge.

[0009] Furthermore, the secondary spray tower of this utility model is provided with a spray cavity for gas to pass through, and a spray head assembly is provided at the upper end of the spray cavity.

[0010] By adopting the above technical solution, the spray head assembly can spray alkaline solutions (such as NaOH) to neutralize acidic gases (such as SO2).

[0011] Furthermore, the three-stage activated carbon adsorption device of this utility model is provided with several pluggable activated carbon adsorption modules.

[0012] Furthermore, the centrifugal spinning drum of this utility model has anti-detachment protrusions on both sides of the middle gear rack;

[0013] By adopting the above technical solution, the centrifugal drum can be prevented from shifting left or right during rotation.

[0014] The beneficial effects of this utility model are: the multi-stage waste gas treatment device for coated sand production of this utility model not only arranges multi-stage waste gas treatment devices to treat the waste gas generated in the process of coated sand production, but also adds a dust removal device at the head of the waste gas discharge, so that most of the dust particles and solid impurities can be thrown out in the initial stage of discharge, resulting in better subsequent waste gas treatment effect. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] The following are the labels in the diagram: 1. Secondary spray tower, 2. Exhaust fan, 3. Ventilation pipe, 4. Base, 5. Outer cover, 6. Centrifugal swirl tank, 7. Drive motor, 8. Drive gear, 9. Intermediate gear rack, 10. Driven gear, 11. Channel opening, 12. Sealed rotary coupling, 13. Anti-detachment ridge, 14. Mesh structure, 15. Particulate solid impurity collection bag, 16. Spray cavity, 17. Spray head assembly, 18. Activated carbon adsorption module. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] like Figure 1 The multi-stage waste gas treatment device for coated sand production shown includes, from left to right, a primary dust collector, a secondary spray tower 1, a tertiary activated carbon adsorption device, and a suction fan 2; the primary dust collector, the secondary spray tower 1, the tertiary activated carbon adsorption device, and the suction fan 2 are connected by a ventilation pipe 3.

[0020] The primary dust collector includes a base 4, an outer cover 5 on the base 4, a centrifugal dust collector 6 inside the outer cover 5, a drive motor 7 on the base 4, a drive gear 8 connected to the output shaft of the drive motor 7, the drive gear 8 meshing with the lower end of the middle gear rack 9 on the outer ring of the centrifugal dust collector 6, and the upper end of the middle gear rack 9 meshing with the driven gear 10 at the upper end inside the outer cover 5; the channel openings 11 at the left and right ends of the centrifugal dust collector 6 are respectively connected to the corresponding ventilation pipes 3 through sealed rotary couplings 12.

[0021] The side wall of the centrifugal spinning drum 6 has a mesh structure 14, and the outer cover 5 is fitted with a particulate solid impurity collection bag 15.

[0022] The secondary spray tower 1 is equipped with a spray cavity 16 for gas to pass through, and a spray head assembly 17 is installed at the upper end of the spray cavity 16.

[0023] The three-stage activated carbon adsorption device is equipped with several pluggable activated carbon adsorption modules 18.

[0024] Anti-detachment protrusions 13 are provided on both sides of the middle gear rack 9 on the centrifugal spinning drum 6.

[0025] Working principle:

[0026] Connect the primary dust collector, secondary spray tower, tertiary activated carbon adsorption device and suction fan through ventilation pipes. Connect the left end of the primary dust collector to the upstream exhaust pipe and the right output end of the suction fan to the next stage of processing.

[0027] The upstream exhaust gas (containing a large amount of particulate solid impurities) first enters the centrifugal swivel drum in the first stage of the dust removal device. Under the rotation of the centrifugal swivel drum, most of the particulate solid impurities are thrown out from the side wall of the mesh structure of the centrifugal swivel drum under the action of centrifugal force and fall into the pre-installed particulate solid impurity collection bag.

[0028] Next, the gas in the primary dust collector enters the spray cavity of the secondary spray tower, where the spray head group sprays alkaline solutions (such as NaOH) to neutralize acidic gases (such as SO2). Then, the gas in the secondary spray tower enters the tertiary activated carbon adsorption device for further purification and is then drawn to the next treatment stage by a suction fan.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-stage waste gas treatment device for coated sand production, characterized in that: From left to right, the system includes a primary dust removal device, a secondary spray tower (1), a tertiary activated carbon adsorption device, and a suction fan (2); the primary dust removal device, the secondary spray tower (1), the tertiary activated carbon adsorption device, and the suction fan (2) are connected by a ventilation pipe (3). The first-stage centrifugal dust collector includes a base (4), an outer cover (5) on the base (4), a centrifugal centrifugal drum (6) inside the outer cover (5), a drive motor (7) on the base (4), a drive gear (8) connected to the output shaft of the drive motor (7), the drive gear (8) meshing with the lower end of the middle gear rack (9) on the outer ring of the centrifugal centrifugal drum (6), the upper end of the middle gear rack (9) meshing with the driven gear (10) at the upper end inside the outer cover (5); the channel openings (11) at the left and right ends of the centrifugal centrifugal drum (6) are respectively connected to the corresponding ventilation pipes (3) through sealed rotary couplings (12); The side wall of the centrifugal spinning drum (6) is a mesh structure (14), and the outer cover (5) is provided with a particulate solid impurity collection bag (15).

2. The multi-stage waste gas treatment device for coated sand production as described in claim 1, characterized in that: The secondary spray tower (1) is provided with a spray cavity (16) for gas to pass through, and a spray head assembly (17) is provided at the upper end of the spray cavity (16).

3. The multi-stage waste gas treatment device for coated sand production as described in claim 1, characterized in that: The three-stage activated carbon adsorption device is equipped with several pluggable activated carbon adsorption modules (18).

4. The multi-stage waste gas treatment device for coated sand production as described in claim 1, characterized in that: Anti-detachment protrusions (13) are provided on the left and right sides of the middle gear rack (9) on the centrifugal spinning drum (6).

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