Waste gas collecting and discharging system for printing workshop

Abstract

The utility model relates to the technical field of printing, and provides a printing workshop waste gas collecting and discharging system which comprises a sealed workshop, ink adjusting equipment, a printing machine and a drying oven are arranged in the workshop, an ink fountain is arranged on the ground of the workshop, a trench collecting pipeline is arranged below the ink fountain, and an air outlet of the trench collecting pipeline is formed outside the workshop. A natural air inlet face is arranged on the side wall, close to the equipment operation face, of the workshop, and a first exhaust pipe set is arranged on the side wall, away from the equipment operation face, of the workshop. An exhaust port of each drying oven is connected with a second exhaust pipe through a connecting pipe; and a third exhaust pipe group is arranged at the top of the workshop. The sealed workshop can effectively prevent waste gas from directly escaping into the atmosphere and prevent the waste gas from directly polluting the atmosphere; the system is convenient to construct and operate, easy to implement, economical and applicable, the maintenance space requirement of process equipment is met, the air quality of a printing workshop is effectively improved, waste gas is orderly discharged, and meanwhile the physical and psychological health of workers is guaranteed.

Description

Technical Field

[0001] The present application belongs to the field of printing technology, and more specifically, relates to a waste gas collection and emission system for a printing workshop. Background Art

[0002] The printing industry requires a large amount of organic solvents and inks in the production process, which contain a large amount of volatile organic compounds such as acetone, butyl acetate, sec-butyl ester, methyl isobutyl ketone, etc. These solvents will emit a large amount of waste gas during the process of ink mixing and drying, which seriously affects the physical and mental health of operators.

[0003] At present, printing workshops allow such waste gas to escape without recycling, causing air pollution in the workshop, affecting the health of production workers, and these wastes will further pollute the atmosphere when they enter the atmosphere. In order to protect the physical and mental health of workers, some workshops install fresh air exhaust fans indoors to reduce indoor waste pollution, but the effect is not obvious and is not conducive to the subsequent purification of waste gas. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a printing workshop exhaust gas collection and emission system to solve the technical problem in the prior art that the exhaust gas generated by the printing workshop cannot be effectively collected and discharged.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a printing workshop waste gas collection and emission system, including: a sealed workshop, in which ink mixing equipment, a printing press and an oven are arranged, an ink trough is arranged on the floor of the workshop, a trench collection pipe is arranged below the ink trough, the air outlet of the trench collection pipe is arranged outside the workshop, a natural air inlet surface is arranged on the side wall of the workshop close to the equipment operating surface, and a first exhaust duct group is arranged on the side wall of the workshop away from the equipment operating surface; the exhaust port of each oven is connected to the second exhaust duct through a connecting pipe; and a third exhaust duct group is arranged on the top of the workshop.

[0006] In one embodiment, the connecting pipe is a hose.

[0007] In one embodiment, the hose is a metal bellows.

[0008] In one embodiment, the metal bellows is detachably connected to the exhaust port of the oven.

[0009] In one embodiment, the first exhaust duct group includes a first exhaust duct and a first grille outlet spaced apart on the first exhaust duct; one end of the first exhaust duct is a closed end, and the other end is provided with a first exhaust fan.

[0010] In one embodiment, one end of the second exhaust duct is a closed end, and the other end is provided with a second exhaust fan.

[0011] In one embodiment, the third exhaust duct group includes a third exhaust duct and a third grille outlet arranged on the third exhaust duct, one end of the third exhaust duct is a closed end, and the other end is provided with a third exhaust fan.

[0012] In one embodiment, outside the workshop, the trench collection pipe, the first exhaust pipe group and the third exhaust pipe group are connected to a collection pipe, and a collection exhaust fan is provided on the collection pipe.

[0013] In one embodiment, the collecting pipe is connected to a zeolite rotor device, the zeolite rotor is connected to an RTO device, and the second exhaust pipe is connected to the RTO device.

[0014] The beneficial effects of the printing workshop exhaust gas collection and emission system provided by the present application are:

[0015] 1. A sealed workshop can effectively prevent exhaust gas from escaping directly into the atmosphere, thus preventing exhaust gas from directly polluting the atmosphere;

[0016] 2. The exhaust gas discharged from the oven has the characteristics of small air volume and high concentration. It is directly collected through the connecting pipe and discharged separately through the second exhaust pipe, which is conducive to directly matching the relevant exhaust gas treatment equipment (RTO equipment) and improving the treatment efficiency;

[0017] 3. The low-concentration exhaust gas in the workshop environment can be effectively discharged through the trench collection pipe, the first exhaust duct group and the third exhaust duct group, which is conducive to matching related equipment (zeolite wheel enrichment + RTO equipment combustion treatment) for treatment to ensure environmental protection;

[0018] 4. The first exhaust duct group and the natural air inlet surface are located on both sides of the equipment operation surface, so that the airflow formed by the fresh air entering directly flows to the equipment operation surface, ensuring that the staff is in a fresh air environment;

[0019] 5. The connecting pipe is detachably connected to the exhaust port of the oven, which can meet the requirements of exhaust gas collection without interfering with the original operation of the oven equipment;

[0020] 6. The construction and operation of this system are convenient and easy to implement, economical and applicable. It not only meets the maintenance space requirements of process equipment, but also effectively improves the air quality of the printing workshop and realizes the orderly discharge of waste gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 any creative work.

[0022] Figure 1 A simplified side view schematic diagram of the structure of the printing workshop exhaust gas collection and emission system provided in an embodiment of the present application;

[0023] Figure 2 This is a simplified schematic diagram of the front view of the printing workshop exhaust gas collection and emission system provided in an embodiment of the present application.

[0024] Among them, the reference numerals in the figure are:

[0025] 1. Workshop; 2. Oven; 3. Ink tank; 4. Trench collection pipe; 5. Natural air inlet surface; 6. First exhaust duct group; 61. First exhaust duct; 62. First grille air outlet; 7. Connecting pipe; 8. Second exhaust duct; 9. Third exhaust duct group; 91. Third exhaust duct; 92. Third grille air outlet; 10. Collection pipe. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to 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.

[0029] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] like Figure 1-Figure 2 As shown, a printing workshop waste gas collection and emission system provided in an embodiment of the present application is now described. The printing workshop waste gas collection and emission system comprises: a sealed workshop 1, in which an ink mixing device, a printing press and an oven 2 are arranged, respectively realizing the ink mixing and printing press drying processes. The sealed workshop 1 can prevent the waste gas from naturally escaping into the printing workshop and the atmosphere.

[0031] In this embodiment, an ink trough 3 is provided on the floor of the workshop 1, and a trench collecting pipe 4 is provided under the ground below the ink trough 3. The air outlet of the trench collecting pipe 4 is arranged outside the workshop 1, so as to collect the exhaust gas escaping downward from the ink trough 3; a natural air inlet surface 5 is provided on the side wall of the workshop 1 close to the equipment operation surface, and the natural air inlet surface 5 is used to supply fresh air to the workshop 1, so as to ensure that the position where the staff is located is hollow and fresh; the natural air inlet surface 5 is formed by a grille return air plate.

[0032] A first exhaust duct group 6 is provided on the side wall of the workshop 1 away from the equipment operation surface, which is used to laterally discharge the exhaust gas emitted from the ink tank 3 and form convection with the natural air inlet surface 5 to facilitate the flow of fresh air; the exhaust port of each oven 2 is connected to a second exhaust duct 8 through a connecting pipe 7, and each connecting pipe 7 and the second exhaust duct 8 are used to separately collect and discharge the high-concentration exhaust gas emitted by the oven 2; a third exhaust duct group 9 is provided on the top of the workshop 1, which is used to collect and discharge the exhaust gas emitted at the top of the workshop 1.

[0033] Specifically, in the present embodiment, the connecting pipe 7 is a hose, which facilitates the operation of the oven 2 . Preferably, the hose is a metal bellows, which is resistant to high temperatures and can effectively withstand the high-temperature exhaust gas discharged from the oven 2 .

[0034] In this embodiment, the metal bellows is detachably connected to the exhaust port of the oven 2, which will not affect the original operation of the oven 2 and is convenient for cleaning, maintenance, etc.; specifically, the detachable connection can be achieved by means of a clamp, plug-in, wrapping with tape, etc.

[0035] In this embodiment, the first exhaust duct group 6 includes a first exhaust duct 61 and a first grille outlet 62 arranged at intervals on the first exhaust duct 61; the first exhaust duct 61 is arranged on the side wall of the workshop 1 through a bracket, one end of the first exhaust duct 61 is a closed end, the other end is provided with a first exhaust fan or, and the other end is connected to the aggregation pipe 10. The first grille outlet 62 is used to discharge the exhaust gas of the workshop 1 into the first exhaust duct 61.

[0036] In this embodiment, the second exhaust duct 8 is arranged outside the side wall of the workshop 1 through a bracket, one end of the second exhaust duct 8 is a closed end, and the other end is provided with a second exhaust fan.

[0037] In this embodiment, the third exhaust duct group 9 includes a third exhaust duct 91 and a third grille outlet 92 arranged on the third exhaust duct 91, and the third grille outlet 92 is used to discharge the exhaust gas of the workshop 1 into the third exhaust duct 91. One end of the third exhaust duct 91 is a closed end, and the other end is provided with a third exhaust fan or the other end is connected to the collection pipe 10.

[0038] In this embodiment, outside the workshop 1, the trench collection pipe 4, the first exhaust pipe group 6 and the third exhaust pipe group 9 are connected to the collection pipe 10, and the collection pipe 10 is provided with a collection exhaust fan, so that low-concentration exhaust gas can be collected, and then discharged into the enrichment equipment for enrichment, and finally treated by the exhaust gas combustion equipment. Specifically, the collection pipe 10 is connected to the zeolite wheel equipment for enriching low-concentration exhaust gas, the zeolite wheel is connected to the RTO equipment, and the enriched exhaust gas is passed into the RTO equipment for combustion treatment; the second exhaust pipe 8 is connected to the RTO equipment, and the high-temperature and high-concentration exhaust gas discharged from the oven 2 is directly discharged into the RTO equipment for combustion treatment; in this way, the low-concentration and high-concentration exhaust gases are treated separately, which can effectively improve the exhaust gas treatment efficiency.

[0039] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A printing workshop exhaust gas collection and emission system, characterized in that: include: A sealed workshop (1) is provided with ink mixing equipment, a printing press and an oven (2) in the workshop (1); an ink tank (3) is provided on the floor of the workshop (1); a trench collecting pipe (4) is provided below the ink tank (3); an air outlet of the trench collecting pipe (4) is arranged outside the workshop (1); a natural air inlet surface (5) is provided on the side wall of the workshop (1) close to the equipment operation surface; a first exhaust duct group (6) is provided on the side wall of the workshop (1) away from the equipment operation surface; the exhaust port of each oven (2) is connected to a second exhaust duct (8) via a connecting pipe (7); and a third exhaust duct group (9) is provided on the top of the workshop (1).

2. The printing workshop exhaust gas collection and emission system according to claim 1, characterized in that: The connecting pipe (7) is a hose.

3. The printing workshop exhaust gas collection and emission system as claimed in claim 2, characterized in that: The hose is a metal bellows.

4. The printing workshop exhaust gas collection and emission system as claimed in claim 3, characterized in that: The metal bellows is detachably connected to the exhaust port of the oven (2).

5. The printing workshop exhaust gas collection and emission system according to any one of claims 1 to 4, characterized in that: The first exhaust duct group (6) comprises a first exhaust duct (61) and a first grille air outlet (62) arranged at intervals on the first exhaust duct (61); one end of the first exhaust duct (61) is a closed end, and the other end is provided with a first exhaust fan.

6. The printing workshop exhaust gas collection and emission system as claimed in claim 5, characterized in that: One end of the second exhaust duct (8) is a closed end, and the other end is provided with a second exhaust fan.

7. The printing workshop exhaust gas collection and emission system according to claim 6, characterized in that: The third exhaust duct group (9) comprises a third exhaust duct (91) and a third grille air outlet (92) arranged on the third exhaust duct (91); one end of the third exhaust duct (91) is a closed end, and the other end is provided with a third exhaust fan.

8. The printing workshop exhaust gas collection and emission system as claimed in claim 1, characterized in that: Outside the workshop (1), the trench collection pipe (4), the first exhaust pipe group (6) and the third exhaust pipe group (9) are connected to a collection pipe (10), and a collection exhaust fan is provided on the collection pipe (10).

9. The printing workshop exhaust gas collection and emission system as claimed in claim 8, characterized in that: The collecting pipe (10) is connected to the zeolite rotor equipment, the zeolite rotor is connected to the RTO equipment, and the second exhaust pipe (8) is connected to the RTO equipment.

Images