Zero emission structure for solvent recovery waste gas of casting machine

Abstract

The utility model provides a waste gas zero-emission structure for solvent recovery of a casting machine, and solves the problem that waste gas generated during drying of a cast film is discharged from high altitude to pollute the environment. One end of the first box body is connected with an air outlet of the exhaust fan, and the other end of the first box body is connected with an air inlet of the heating box; the cooling pipes are uniformly distributed in the first box body; the cooler is used for being connected with the water inlet and the water outlet of the cooling pipe; and the drain valve is arranged at the bottom of the first box body. The cooling pipe is a finned pipe, the exhaust fan conveys waste gas in the casting machine into the first box body, solvent steam in the waste gas is cooled into a liquid state through the cooling pipe and drips to the bottom of the first box body, the solvent steam can be collected through the drain valve, and the waste gas enters the heating box to be heated after being cooled and then enters the casting machine. Solvent recovery and zero emission of waste gas are achieved, and pollution to the environment is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cast film production, in particular to a zero-emission structure for waste gas from solvent recovery of a cast film machine. Background Art

[0002] Casting machine refers to special equipment for making cast film. It adopts high-precision electronic ceramic casting machine and uses alumina as the main raw material for ceramic casting. First, the crushed powder is mixed with binder, plasticizer, dispersant and solvent to make slurry with a certain viscosity. The slurry flows down from the hopper and is scraped and coated on a special base belt with a certain thickness by a scraper. After drying and curing, it is peeled off from the top to become a thin film of green tape. Then, according to the size and shape of the finished product, the green tape needs to be punched, laminated and other processing to make a blank product to be sintered.

[0003] When the slurry is dried in the casting drying tunnel, a large amount of organic solvent vapor will be generated. Organic solvent vapor generally contains alcohol gas and some toxic gases. When discharging organic solvent vapor and waste gas, it is generally discharged to high altitude through an exhaust fan. However, as people's requirements for environmental protection become higher and higher, high-altitude discharge needs to be gradually eliminated. Utility Model Content

[0004] In order to overcome the shortcomings of the background technology, the utility model provides a zero-emission structure for waste gas from solvent recovery of a casting machine, which solves the problem of high-altitude emission of waste gas generated during drying of the cast film and polluting the environment.

[0005] The technical solution adopted by the utility model is as follows:

[0006] The zero emission structure of waste gas from solvent recovery of the tape casting machine includes a heating box and an exhaust fan arranged on the tape casting machine, and also includes:

[0007] Box body No. 1, one end of which is connected to the air outlet of the exhaust fan, and the other end of which is connected to the air inlet of the heating box;

[0008] Cooling pipes are evenly distributed in box No. 1;

[0009] A cooler, used to be connected to the water inlet and outlet of the cooling pipe;

[0010] The drain valve is arranged at the bottom of the No. 1 box.

[0011] The heating box comprises a second box body, and a hot water pipe is arranged in the second box body.

[0012] The cooling tubes are arranged vertically, and at least two rows of the cooling tubes are provided, and the front and rear adjacent cooling tubes are arranged in a staggered manner.

[0013] The first box body is provided with an upper water tank and a lower water tank for communicating with the cooling pipe, the number of the upper water tanks is at least two, the number of the lower water tanks is at least one, and the lower water tank is communicated with the adjacent upper water tank.

[0014] A plurality of baffles arranged in a staggered manner are provided at the air outlet of the first box body.

[0015] The first box body is provided with a guide plate, and the guide plate is located at the front end of the cooling pipe.

[0016] The first box body includes an air inlet section, a cooling section and an air outlet section. The cooling pipe is located in the cooling section. The cross-sectional volume of the cooling section is larger than the cross-sectional volumes of the air inlet section and the air outlet section.

[0017] The beneficial effects of the utility model are:

[0018] The cooling pipe is a finned tube, and the exhaust fan transports the exhaust gas in the cast film machine to the No. 1 box. The solvent vapor in the exhaust gas is cooled into liquid through the cooling pipe and drips to the bottom of the No. 1 box. It can be collected by the drain valve. After cooling, the exhaust gas enters the heating box for heating and then enters the cast film machine, realizing solvent recovery and zero emission of exhaust gas without causing pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the utility model.

[0020] Figure 2 It is a longitudinal sectional schematic diagram of the cooling box of the utility model.

[0021] Figure 3 It is a transverse cross-sectional schematic diagram of the cooling box of the utility model.

[0022] Figure 4 It is a schematic diagram of the interior of the heating box of the utility model.

[0023] Box body No. 1 1, cooling pipe 2, cooler 3, drain valve 4, box body No. 2 5, hot water pipe 6, upper water tank 7, lower water tank 8, baffle 9, guide plate 10, air inlet section 11, cooling section 12, air outlet section 13. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0025] In the embodiment, Figure 1 , Figure 2 , Figure 3 As shown, the zero emission structure of waste gas from solvent recovery of the casting machine includes a heating box and an exhaust fan arranged on the casting machine, and also includes:

[0026] Box body 1, one end of which is connected to the air outlet of the exhaust fan, and the other end of which is connected to the air inlet of the heating box;

[0027] Cooling pipes 2 are evenly distributed in the first box 1;

[0028] A cooler 3, used to be connected to the water inlet and the water outlet of the cooling pipe 2;

[0029] The drain valve 4 is arranged at the bottom of the first box body 1.

[0030] The cooling tube 2 is a finned tube, and the exhaust fan transports the exhaust gas in the cast film machine to the No. 1 box 1. The solvent vapor in the exhaust gas is cooled into liquid through the cooling tube 2 and drips to the bottom of the No. 1 box 1, and can be collected by the drain valve 4. After cooling, the exhaust gas enters the heating box for heating and then enters the cast film machine, thereby realizing solvent recovery and zero emission of exhaust gas, and will not cause pollution to the environment.

[0031] In the embodiment, Figure 1 , Figure 4 As shown, the heating box includes a second box body 5, and a hot water pipe 6 is arranged in the second box body 5. The hot water pipe 6 is a finned tube for hot water. When the exhaust gas returns to the heating box after cooling, a small amount of solvent vapor may remain. The heating of the hot water pipe 6 can prevent the temperature in the heating box from being too high and causing an explosion.

[0032] In the embodiment, Figure 2 , Figure 3 As shown, the cooling tubes 2 are arranged vertically, and the cooling tubes 2 are provided with at least two rows, and the front and rear adjacent cooling tubes 2 are arranged in a staggered manner, so as to improve the effect of cooling the solvent vapor in the exhaust gas into a liquid state.

[0033] In the embodiment, Figure 2 As shown, the first box body 1 is provided with an upper water tank 7 and a lower water tank 8 for communicating with the cooling pipe 2, the upper water tank 7 is at least two, the lower water tank 8 is at least one, and the lower water tank 8 is communicated with the adjacent upper water tank 7. The coolant flows from the upper water tank 7 to the lower water tank 8 through the cooling pipe 2, and then flows from the lower water tank 8 to another upper water tank 7, thereby improving the utilization rate of the coolant.

[0034] In the embodiment, Figure 3 As shown, a plurality of staggered baffles 9 are provided at the air outlet of the first box 1. Increasing the time that the exhaust gas stays in the first box 1 can better cool the solvent vapor in the exhaust gas into liquid.

[0035] In the embodiment, Figure 3As shown, the first box 1 is provided with a guide plate 10, and the guide plate 10 is located at the front end of the cooling tube 2. The exhaust gas entering the first box 1 is evenly distributed to the front end of the cooling tube 2 by the guide plate 10, so that the exhaust gas is easy to contact with each cooling tube 2 arranged evenly, thereby accelerating the efficiency of cooling the solvent vapor into liquid.

[0036] In the embodiment, Figure 2 , Figure 3 As shown, the first housing 1 includes an air inlet section 11, a cooling section 12 and an air outlet section 13. The cooling pipe 2 is located in the cooling section 12, and the cross-sectional volume of the cooling section 12 is larger than the cross-sectional volumes of the air inlet section 11 and the air outlet section 13. After entering the cooling section 12, the flow rate of the exhaust gas slows down, increasing the residence time of the exhaust gas in the cooling section 12 and improving the cooling efficiency of the solvent vapor.

[0037] Obviously, the above embodiments of the present invention are merely examples for illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to provide all the implementation methods here. However, these obvious changes or modifications derived from the essential spirit of the present invention still fall within the scope of protection of the present invention.

Claims

1. A zero-emission structure for waste gas from solvent recovery of a tape casting machine, comprising a heating box and an exhaust fan arranged on the tape casting machine, characterized in that: Also includes: A box body (1) has one end connected to the air outlet of the exhaust fan and the other end connected to the air inlet of the heating box; Cooling pipes (2) are evenly distributed in the first box (1); A cooler (3) used to be connected to a water inlet and a water outlet of a cooling pipe (2); The drain valve (4) is arranged at the bottom of the first box (1).

2. The zero emission structure of waste gas from solvent recovery of a tape casting machine as claimed in claim 1, characterized in that: The heating box comprises a second box body (5), and a hot water pipe (6) is provided inside the second box body (5).

3. The zero emission structure of waste gas from solvent recovery of a casting machine as claimed in claim 1, characterized in that: The cooling tubes (2) are arranged vertically, and the cooling tubes (2) are provided in at least two rows, with the front and rear adjacent cooling tubes (2) being arranged in a staggered manner.

4. The zero emission structure of waste gas from solvent recovery of a tape casting machine as claimed in claim 3, characterized in that: The first box body (1) is provided with an upper water bin (7) and a lower water bin (8) for communicating with the cooling pipe (2), the upper water bins (7) being at least two, the lower water bin (8) being at least one, and the lower water bin (8) being in communication with an adjacent upper water bin (7).

5. The zero emission structure of waste gas from solvent recovery of tape casting machine as claimed in claim 1, characterized in that: A plurality of baffles (9) arranged in a staggered manner are provided at the air outlet of the first box body (1).

6. The zero emission structure of waste gas from solvent recovery of a tape casting machine as claimed in claim 1, characterized in that: A guide plate (10) is provided in the first box body (1), and the guide plate (10) is located at the front end of the cooling pipe (2).

7. The zero emission structure of waste gas from solvent recovery of a tape casting machine as claimed in claim 1, characterized in that: The first housing (1) comprises an air inlet section (11), a cooling section (12) and an air outlet section (13); the cooling pipe (2) is located in the cooling section (12); and the cross-sectional volume of the cooling section (12) is greater than the cross-sectional volumes of the air inlet section (11) and the air outlet section (13).

Images