CN210786813U

CN210786813U - Waste gas recovery device of reflow soldering machine

Info

Publication number: CN210786813U
Application number: CN201921583395.7U
Authority: CN
Inventors: 陈华琴; 韦大程; 叶香珠; 俞佳艳; 俞峰; 陈佳倩; 陈泽波; 谢起汉; 孙利
Original assignee: Mingguan Technology Fujian Co ltd
Current assignee: Mingguan Technology Fujian Co ltd
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-06-19
Anticipated expiration: 2029-09-23

Abstract

The utility model discloses a waste gas recovery device of a reflow soldering machine, which comprises a gas collecting device, a gas reaction device and a catalyst reaction device; the gas collecting device comprises a gas collecting port connected with an exhaust device of the reflow soldering machine, a blower connected with the gas collecting port and used for blowing gas into the gas reaction device, and a U-shaped pipe, wherein one end of the U-shaped pipe is connected with the blower, and the other end of the U-shaped pipe is connected with the gas reaction device and used for preventing liquid in the gas reaction device from flowing into the blower; the gas reaction device comprises a reaction bottle for containing sodium hydroxide, a first gas inlet arranged at the top end of the reaction bottle and used for inserting a U-shaped pipe, a gas outlet arranged at the top end of the side wall of the reaction bottle and a PH detector; the catalyst reaction device comprises a catalyst box, a second air inlet arranged at the bottom end of the catalyst box, an air outlet at the top end of the catalyst box and a catalyst heating device surrounding the catalyst box.

Description

Waste gas recovery device of reflow soldering machine

Technical Field

The utility model relates to a backflow welder's waste gas recovery device belongs to exhaust-gas treatment technical field.

Background

With the development of technology, circuit boards are widely appeared in the front of people, the original manual soldering is changed into the reflow soldering machine used at present for soldering circuit boards, however, the reflow soldering machine generates waste gas, and the waste gas contains sulfur dioxide, carbon monoxide, nitric oxide, hydrogen sulfide and the like. Carbon monoxide inhalation can cause gas poisoning and serious death; the inhalation of sulfur-containing gas can destroy the surface mucous membrane in human body and influence the PH regulation. These gases contaminate the atmosphere and form acid rain which falls down and can also mildly corrode human skin.

Therefore, it is desirable to develop a recycling device that can be used to recycle reflow soldering machine exhaust.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a waste gas recovery device of reflow soldering machine to solve above problem.

In order to achieve the above purpose, the present invention is realized by the following technical solution: the utility model provides a waste gas recovery device of reflow soldering machine which characterized in that: comprises a gas collecting device, a gas reaction device and a catalyst reaction device; the gas collecting device comprises a gas collecting port connected with an exhaust device of the reflow soldering machine, a blower connected with the gas collecting port and used for blowing gas into the gas reaction device, and a U-shaped pipe, wherein one end of the U-shaped pipe is connected with the blower, and the other end of the U-shaped pipe is connected with the gas reaction device and used for preventing liquid in the gas reaction device from flowing into the blower; the gas reaction device comprises a reaction bottle for containing sodium hydroxide, a first gas inlet arranged at the top end of the reaction bottle and used for inserting a U-shaped pipe, a gas outlet arranged at the top end of the side wall of the reaction bottle and a PH detector; the catalyst reaction device comprises a catalyst box, a second air inlet arranged at the bottom end of the catalyst box, an air outlet at the top end of the catalyst box and a catalyst heating device surrounding the catalyst box.

Furthermore, the bottom of one end of the U-shaped pipe inserted into the reaction bottle is provided with a glass bulb for dispersing gas, and the glass bulb is provided with a plurality of air holes.

Further, the gas reaction device is connected with a second gas inlet through a gas exhaust pipe; the exhaust pipe is a Z-shaped pipe.

Furthermore, a drain hole for discharging the sodium hydroxide solution is arranged at the bottom of the reaction bottle.

Furthermore, a catalyst is arranged in the catalyst box, so that gas reaction is facilitated.

Further, the catalyst heating device is an electromagnetic heating device.

Advantageous effects

A waste gas recovery device of a reflow soldering machine is characterized in that sodium hydroxide reacts with gas in a reaction bottle, can react with sulfur dioxide gas and hydrogen sulfide gas in the gas, and can react with nitrogen dioxide and sulfur monoxide possibly existing at the same time; the nitric oxide and the carbon monoxide can not independently react with a certain solution, and the carbon monoxide and the nitric oxide are reacted by using the catalyst to generate pollution-free carbon dioxide and nitrogen, because the catalyst does not participate in the reaction and the catalyst in the catalyst reaction box does not need to be replaced; the PH detector arranged on the reaction bottle can find whether the sodium hydroxide is effective or not in time so as to remind of replacing the sodium hydroxide solution in time.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a general schematic view of an exhaust gas recovery device of a reflow soldering machine according to the present invention;

FIG. 2 is a schematic structural view of a gas collecting device of a waste gas recycling device of a reflow soldering machine according to the present invention;

FIG. 3 is a schematic structural view of a gas reaction device of a waste gas recovery device of a reflow soldering machine according to the present invention;

fig. 4 is the schematic structural diagram of the catalyst reaction device of the exhaust gas recovery device of the reflow soldering machine of the present invention.

The reference numbers in the figures are:

1. a gas collection device; 11. a gas collection port; 12. a blower; 13. a U-shaped tube; 14. a glass bulb; 15. air holes; 2. a gas reaction device; 21. a reaction bottle; 22. a first air inlet; 23. an exhaust port; 24. a pH detector; 25. an exhaust pipe; 26. a drain hole; 3. a catalyst reaction unit; 31. a second air inlet; 32. a catalyst case; 33. an air outlet; 34. a catalyst heating device.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

Referring to fig. 1 to 4, the utility model provides a waste gas recovery device of reflow soldering machine, its characterized in that: comprises a gas collecting device 1, a gas reaction device 2 and a catalyst reaction device 3; the gas collecting device 1 comprises a gas collecting port 11 connected with an exhaust device of the reflow soldering machine, a blower 12 connected with the gas collecting port 11 and used for blowing gas into the gas reaction device 2, and a U-shaped pipe 13, one end of the U-shaped pipe is connected with the blower 12, the other end of the U-shaped pipe is connected with the gas reaction device 2, and liquid in the gas reaction device 2 is prevented from flowing into the blower 12; the gas reaction device 2 comprises a reaction bottle 21 for containing sodium hydroxide, a first gas inlet 22 arranged at the top end of the reaction bottle 21 and used for inserting the U-shaped pipe 13, a gas outlet 23 arranged at the top end of the side wall of the reaction bottle 21 and a PH detector 24; the catalytic reaction device 3 comprises a catalyst box 32, a second air inlet 31 arranged at the bottom end of the catalyst box 32, an air outlet 33 at the top end of the catalyst box 32 and a catalyst heating device 34 surrounding the catalyst box 32.

Further, a glass bulb 14 for dispersing gas is provided at the bottom of one end of the U-shaped tube 13 inserted into the reaction flask 21, and a plurality of air holes 15 are provided in the glass bulb 14.

Further, the gas reaction device 2 is connected with a second gas inlet 31 through a gas exhaust pipe 25; the exhaust pipe 25 is a zigzag pipe.

Further, a drain hole 26 for discharging the sodium hydroxide solution is provided at the bottom of the reaction flask 21.

Further, a catalyst is arranged in the catalyst box 32, so that gas reaction is facilitated.

Further, the catalyst heating device 34 is an electromagnetic heating device.

The utility model discloses a theory of operation:

the utility model provides a waste gas recovery device of reflow soldering machine its theory of operation utilizes sodium hydroxide solution can react with hydrogen sulfide gas, sulfur dioxide, sulfur monoxide, and remaining carbon monoxide, nitrogen monoxide generate carbon dioxide and nitrogen gas's theory of operation through the catalyst reaction, and its induction equation is:

2NaOH + SO2=Na2SO3 + H2O

2NaOH+H2S=Na2S+2H2O

2CO + 2NO = = catalyst = = 2CO2 + N2

A glass bulb 14 is arranged at one end of the reaction bottle of the U-shaped pipe 13, and a plurality of air holes 15 are arranged on the glass bulb 14, so that gas can be released into the sodium hydroxide solution in a small bubble state to enable the reaction to be more thorough; carbon monoxide and nitric oxide need to be heated in the catalyst reaction process, the catalyst is heated more quickly by utilizing the principle of generating eddy current by electromagnetism, and carbon monoxide and nitric oxide are exothermic reactions and do not need to be heated again after the reaction is started.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a waste gas recovery device of reflow soldering machine which characterized in that: comprises a gas collecting device (1), a gas reaction device (2) and a catalyst reaction device (3); the gas collecting device (1) comprises a gas collecting port (11) connected with an exhaust device of the reflow soldering machine, a blower (12) connected with the gas collecting port (11) and used for blowing gas into the gas reaction device (2), and a U-shaped pipe (13) of which one end is connected with the blower (12) and the other end is connected with the gas reaction device (2) and used for preventing liquid in the gas reaction device (2) from flowing into the blower (12); the gas reaction device (2) comprises a reaction bottle (21) for containing sodium hydroxide, a first gas inlet (22) arranged at the top end of the reaction bottle (21) and used for inserting the U-shaped pipe (13), a gas outlet (23) arranged at the top end of the side wall of the reaction bottle (21) and a PH detector (24); the catalyst reaction device (3) comprises a catalyst box (32), a second air inlet (31) arranged at the bottom end of the catalyst box (32), an air outlet (33) at the top end of the catalyst box (32) and a catalyst heating device (34) surrounding the catalyst box (32).

2. The exhaust gas recovery device of a reflow soldering machine according to claim 1, wherein: the bottom of one end of the U-shaped pipe (13) inserted into the reaction bottle (21) is provided with a glass bubble (14) for dispersing gas, and the glass bubble (14) is provided with a plurality of air holes (15).

3. The exhaust gas recovery device of a reflow soldering machine according to claim 2, wherein: the gas reaction device (2) is connected with a second gas inlet (31) through a gas exhaust pipe (25); the exhaust pipe (25) is a Z-shaped pipe.

4. The exhaust gas recovery device of a reflow soldering machine according to claim 3, wherein: the bottom of the reaction bottle (21) is provided with a drain hole (26) for discharging the sodium hydroxide solution.

5. The exhaust gas recovery device of a reflow soldering machine according to claim 4, wherein: and a catalyst is arranged in the catalyst box (32) to facilitate gas reaction.

6. The exhaust gas recovery device of a reflow soldering machine according to claim 5, wherein: the catalyst heating device (34) is an electromagnetic heating device.