CN216244892U

CN216244892U - Air inlet device

Info

Publication number: CN216244892U
Application number: CN202122925360.0U
Authority: CN
Inventors: 屠文闻; 阮佳吉; 鲁波
Original assignee: Ningbo Sibairui Automatic Control Equipment Co ltd
Current assignee: Ningbo Sibairui Automatic Control Equipment Co ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-04-08
Anticipated expiration: 2031-11-26

Abstract

The utility model discloses an air inlet device, comprising: the control part is connected with the gas supply equipment and is used for controlling the gas flow; the heating portion is communicated with the control portion and used for heating gas flowing through, the control portion comprises an air inlet pipeline and a pressure regulating device, the air inlet pipeline is connected with air supply equipment through an air inlet, the pressure regulating device is arranged on the air inlet pipeline and used for controlling the flow rate of the gas entering, and the heating portion is connected with the air inlet pipeline and outputs the heated gas through an air outlet. According to the utility model, through the combined arrangement of the control part and the heating part, not only can the condition that the gas entering is insufficient or excessive be avoided, the stability of the internal gas pressure and the gas flow of the whole gas inlet device is ensured, and a relatively stable gas raw material is provided for subsequent equipment, but also the heating part can continuously and reliably heat the gas flowing through, so that the gas is ensured to be maintained in a stable temperature range, and the condition that the gas is decomposed or crystallized and condensed is avoided.

Description

Air inlet device

Technical Field

The utility model relates to the technical field of gas treatment, in particular to a gas inlet device.

Background

The existing oxalic acid catalytic degreasing furnace mainly comprises two types of nitrogen gas inlet modes: one is to preheat the nitrogen and then pass it directly into the furnace. According to the technical scheme, nitrogen is not introduced into the oxalic acid conveying device, so that the gasified oxalic acid in the oxalic acid conveying device stays in the volatilization chamber and the acid conveying pipeline for a long time. In order to prevent the gasified oxalic acid from being condensed and crystallized again on the volatilization chamber and the acid conveying pipeline, the temperature on the metal walls of the volatilization chamber and the acid conveying pipeline is far higher than the sublimation temperature of the oxalic acid (the temperature of a common facility is above 175 ℃), so that part of the oxalic acid is directly decomposed (the decomposition temperature of the oxalic acid is 157 ℃) to become water and carbon dioxide, and finally, the actual amount of the oxalic acid entering the furnace body to participate in catalytic degreasing is reduced, and the degreasing rate is slow.

The other type of air inlet mode is mainly that nitrogen which is not preheated is directly introduced into the oxalic acid conveying device, the nitrogen is preheated through heating of the oxalic acid conveying device, and finally the nitrogen enters the degreasing furnace together with gasified oxalic acid. The oxalic acid conveying device in the scheme is filled with cold nitrogen, so that gaseous oxalic acid can be effectively prevented from being heated and decomposed in the volatilization chamber and the acid conveying pipeline, the possibility of condensation and crystallization of the gasified oxalic acid on metal walls of the volatilization chamber and the acid conveying pipeline can be caused, and finally the acid conveying pipeline can be blocked by the crystallized oxalic acid. Meanwhile, the cold nitrogen can condense the gasified oxalic acid into tiny solid oxalic acid particles, the particles are introduced into the furnace body along with the nitrogen, and the oxalic acid of the solid particles can not participate in the catalytic degreasing reaction, so that the content of the gasified oxalic acid and the degreasing rate are reduced. In addition, the oxalic acid in the solid particles can be attached to the inner wall of the furnace body and the surface of the product, so that the furnace body and the product are polluted.

Therefore, it is an urgent need in the art to provide an air inlet device capable of preventing the condensation of oxalic acid crystals while ensuring the complete delivery of the gasified oxalic acid into the furnace.

Disclosure of Invention

The utility model aims to provide a gas inlet device to solve the problem that gas is decomposed or crystallized and condensed in the gas inlet process in the prior art.

In order to achieve the above object, the present invention provides an intake apparatus for delivering gas, comprising: the control part is connected with the gas supply equipment and is used for controlling the gas flow; a heating part communicated with the control part and used for heating the gas flowing through, wherein,

the control part comprises an air inlet pipeline and a pressure regulating device, the air inlet pipeline is connected with air supply equipment through an air inlet, the pressure regulating device is arranged on the air inlet pipeline and used for controlling the flow rate of gas entering, and the heating part is connected with the air inlet pipeline and outputs the heated gas through an air outlet.

Optionally, the air inlet pipe is further provided with a standby air inlet, and the standby air inlet is also connected with the air supply device for standby air supply.

Optionally, the gas inlet pipe is further provided with an electromagnetic valve, a mass flow meter and a pressure gauge, the electromagnetic valve is used for controlling on-off of the gas inlet pipe, the mass flow meter is used for monitoring flow of gas in the gas inlet pipe, and the pressure gauge is used for monitoring pressure of gas in the gas inlet pipe.

Optionally, the heating part includes a housing, a heating element and a heat preservation element, and the heating element and the heat preservation element are disposed in the housing for heating and preserving the gas flowing through.

Optionally, the heating element includes a thermocouple and a heating ring, the heating ring is disposed in the housing, and the thermocouple is disposed in the air outlet.

Optionally, the heating portion further includes a heat conducting member disposed in the housing and connected to the heat generating member for increasing heat transfer efficiency.

Optionally, the heat conducting member is provided with a bending portion, and the heat conducting members are arranged in the shell at even intervals.

Optionally, the heat conducting member is a red copper sheet, and the heating ring is a ceramic heating ring.

As described above, according to the air intake device provided by the present invention, through the combined arrangement of the control portion and the heating portion, not only can insufficient or excessive gas be prevented from entering, and the stability of the internal gas pressure and gas flow rate of the whole air intake device be ensured, and a relatively stable gas raw material is provided for the subsequent equipment, but also the heating portion can continuously and reliably heat the gas flowing through, so that the gas is maintained in a stable temperature range, and the gas is prevented from being decomposed or crystallized and condensed.

In order that the foregoing and other objects, features, and advantages of the utility model will be readily understood, a preferred embodiment of the utility model will be hereinafter described in detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic diagram showing a layout structure of an air intake apparatus of the present invention.

Fig. 2 is a schematic top view showing a heat conductive member of an air intake apparatus according to the present invention.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the utility model will be described in conjunction with the preferred embodiments, it is not intended that the features of the utility model be limited to these embodiments. On the contrary, the intention of the novel description to be incorporated into the embodiments is to cover alternatives or modifications which may be extended in accordance with the appended claims. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The utility model may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention.

Fig. 1 is a schematic diagram showing a layout structure of an air intake apparatus of the present invention, fig. 2 is a schematic diagram showing a top view structure of a heat conductive member in the air intake apparatus of the present invention, and referring to fig. 1 to 2, an embodiment of the present invention provides an air intake apparatus 1 for transporting gas, including: a control unit 10 connected to the gas supply device 00 and configured to control a gas flow rate; and a heating part 11 which is communicated with the control part 10 and is used for heating the gas flowing through.

That is, the air intake device 1 mainly includes a control unit 10 and a heating unit 11, wherein the control unit 10 is connected to the air supply device 00 and can control the flow rate of the gas in the air supply device 00 into the air intake device 1, and the heating unit 11 is communicated with the control unit 10 and can heat the gas entering the heating unit 11 through the control unit 10. Through the combination setting of control portion 10 and heating portion 11, not only can avoid appearing the gaseous not enough or too much condition of entering, guarantee the stability of the inside atmospheric pressure of whole air inlet unit and gas flow, provide more stable gaseous raw materials for follow-up equipment 01, heating portion can last reliable gas to flowing through in addition heats, guarantees that gas maintains in stable temperature range, avoids appearing the gaseous condition of being decomposed or appearing crystallization condensation.

Further, referring to fig. 1, in the present embodiment, the control portion 10 includes an air inlet duct 100 and a pressure regulating device 101, the air inlet duct 100 is connected to the air supply apparatus 00 through an air inlet 12, the pressure regulating device 101 is provided on the air inlet duct 100 for controlling the flow rate of the gas to be introduced, and the heating portion 11 is connected to the air inlet duct 100 and outputs the heated gas through an air outlet 115.

That is, the control part 10 is connected with the air supply device 00 through the air inlet 12 on the air inlet pipeline 100, the pressure regulating device 101 is arranged at a position close to the air inlet 12, the air pressure and the flow of the air entering the air inlet device can be effectively and reliably controlled, the condition that the entering air is insufficient or excessive is avoided, and the stability of the air pressure and the air flow inside the whole air inlet device is ensured. Specifically, in the present embodiment, the pressure regulating device 101 is a pressure regulating valve, preferably an electromagnetic pressure regulating valve, and can be accurately and reliably regulated by automatic control. In other embodiments, the pressure regulating device may have other structures, which is not limited in the present application and may be reasonably set according to actual needs.

It should be noted that the air inlet device in this embodiment is used for inputting nitrogen gas to the oxalic acid conveying device, that is, the air supply device supplies nitrogen gas. Cold nitrogen enters the control part 10 through the air inlet 12, and can stably enter the heating part 11 under the control of the control part 10, and enters the oxalic acid conveying device through the air outlet 115 after the heating part 11 is heated, so that the heated nitrogen carries gasified oxalic acid into the degreasing furnace through the oxalic acid conveying device, and the gasified oxalic acid is used as a catalyst to participate in a catalytic degreasing reaction in the degreasing furnace; in addition, the filled nitrogen can prevent external air from entering the degreasing furnace, so that the phenomenon that the air is mixed with formaldehyde gas generated by catalytic reaction in the degreasing furnace to generate sudden ringing is avoided, and the safety of the whole oxalic acid catalytic degreasing process is ensured. In other embodiments, the air intake device may also be applied to other scenarios, which are not limited in this application, and may be reasonably arranged and arranged according to actual needs.

Further, referring to fig. 1, in the present embodiment, the air intake duct 100 is further provided with a backup air intake 13, and the backup air intake 13 is also connected to the air supply apparatus 00 for backup air supply. That is, when the pressure of the air supply device of the intake port 12 is insufficient or normal air supply is not possible, the backup intake port 13 is opened. Referring to fig. 1, in the present embodiment, a pressure regulating device 101 is also disposed on an air inlet pipe 100 of the backup air inlet 13, and the pressure and flow rate of the air entering the backup air inlet 13 are controlled by the pressure regulating device 101, so as to ensure the stability of the air inlet pressure and flow rate.

In addition, in this embodiment, the air inlet 12 and the backup air inlet 13 are respectively connected to the independent air supply device 00, and the air sources are independently supplied to the air inlet 12 and the backup air inlet 13, and when the air in the air supply device 00 connected to the air inlet 12 is used up or fails, in order to ensure the normal use of the whole device, the air supply device 00 connected to the backup air inlet 13 will replace the former to continue air supply, so as to ensure that the air source of the device is not interrupted in the use process, avoid the whole device from working abnormally, and improve the stability and safety of the device operation.

Further, referring to fig. 1, in the present embodiment, an electromagnetic valve 102, a mass flow meter 103 and a pressure gauge 104 are further disposed on the intake pipe 100, the electromagnetic valve 102 is used for controlling on/off of the intake pipe 100, the mass flow meter 103 is used for monitoring a flow rate of the gas in the intake pipe 100, and the pressure gauge 104 is used for monitoring a pressure of the gas in the intake pipe 100.

Specifically, referring to fig. 1, in the present embodiment, the electromagnetic valves 102 function to control a gas flow path, where two groups of electromagnetic valves 102, which are vertically disposed on the right side in the drawing, respectively control opening and closing of a main gas flow path and a standby gas flow path, the two groups of electromagnetic valves 102 may be normally closed electromagnetic valves, normally open electromagnetic valves, or a combination of the normally open electromagnetic valves and the normally closed electromagnetic valves, which is not limited in this application, and may be reasonably disposed according to actual needs. The electromagnetic valve 102 arranged in the middle in the transverse direction is used for being opened in the sudden power failure state of the equipment, so that enough gas still enters the gas inlet device in the power failure state of the equipment, the requirement of follow-up equipment on the gas is met, and the safety production accident is avoided.

In this embodiment, both the main gas flow path (i.e., the gas flow path communicated with the gas inlet) and the standby gas flow path (i.e., the gas flow path communicated with the standby gas inlet) are connected to the gas inlet of the mass flow meter 103, that is, under the condition that the mass flow meter 103 and the whole equipment normally operate, all the gas flows through the mass flow meter 103, the mass flow meter 103 can accurately control the flow rate of the gas, and functions such as gas flow rate deviation alarm and gas low flow rate alarm can be set, so that the whole gas flow path can be effectively monitored, and the reliability and safety of the operation of the whole equipment can be ensured. The air outlet of the electromagnetic valve 102 arranged in the transverse direction in the middle can be arranged at the upstream of the mass flow meter 103, and can also be arranged at the downstream of the mass flow meter 103. Preferably, in the present embodiment, the air outlet of the solenoid valve 102, which is centrally disposed in the lateral direction, is disposed downstream of the mass flow meter 103, which can ensure that sufficient air enters the air intake device even when the mass flow meter 103 malfunctions.

Meanwhile, referring to fig. 1, the left side of the mass flow meter 103 in the figure is also provided with a passage of the electromagnetic valve 102, and the passage is arranged in parallel with the mass flow meter 103, so that the continuous gas introduction of the equipment can be ensured when the mass flow meter 103 is abnormal or damaged, the requirement of the subsequent equipment on the gas is ensured, and the occurrence of safety production accidents is avoided.

In addition, referring to fig. 1, in the present embodiment, pressure gauges 104 are provided at positions close to the pressure adjusting device on both the main gas flow path and the auxiliary gas flow path, and the pressure gauges 104 can monitor the pressure of the gas in the intake duct 100. Specifically, the pressure gauge 104 can display the pressure of the gas on the one hand, and can set the alarm values of the high pressure and the low pressure of the gas on the other hand, so that the gas pressure can be within a reasonable range, the alarm can be given in time when the low pressure or the high pressure occurs, the staff is reminded to adjust in time, and the stability of the gas inlet pressure is guaranteed.

Further, referring to fig. 1, in the present embodiment, the heating part 11 includes a housing 110, a heat generating member 112 and a heat insulating member 111, and the heat generating member 112 and the heat insulating member 111 are disposed in the housing 110 for heating and insulating the gas flowing therethrough.

That is to say, the heating part 11 mainly comprises a housing 110, a heating element 112 and a heat preservation element 111, wherein the heating element 112 and the heat preservation element 111 are both disposed in the housing 110, the heating element 112 is used for heating the flowing gas, and the heat preservation element 111 is used for preserving the temperature of the heated gas flowing through, so that the gas can keep the heated temperature to enter the subsequent passage. After the gas is delivered to the heating part through the control part at a precisely set flow rate and pressure, the gas can be sufficiently heated in the heating part, and the heated temperature can be accurately controlled by the heating member 112, and finally the gas heated to the set temperature is delivered to subsequent equipment.

Specifically, referring to fig. 1, in the present embodiment, the heat generating element 112 includes a thermocouple 114 and a heat generating coil 113, the heat generating coil 113 is disposed in the housing 110, and is capable of heating the gas flowing through the heat generating coil 113, so as to raise the temperature of the gas, wherein the heat generating coil 113 may be arranged on an inner wall of a bottom of the housing or on an inner wall of a side of the housing, and the thermocouple 114 is disposed in the gas outlet 115, which is not limited in this application. Preferably, the heating ring 113 is a ceramic heating ring, which has high heating efficiency and long service life.

Meanwhile, the thermocouple 114 can detect the temperature of the heated gas in real time and feed the temperature back to a temperature controller (not shown in the figure), and the temperature controller can regulate and control the heating power of the heating coil 113, so that the heated gas is maintained in a reasonable range. The heat insulating member 111 is filled outside the housing 110 or in an interlayer of the housing 110, so that heat dissipation of the heated gas can be reduced, and the heated gas can maintain sufficient heat for a long time. Specifically, the heat insulating member 111 may be heat insulating asbestos or a heat insulating coating, which is not limited in the present application.

Further, referring to fig. 1 and 2, in the present embodiment, the heating part 11 further includes a heat conduction member 116, and the heat conduction member 116 is disposed in the housing 110 and connected to the heat generating member 112 for increasing heat transfer efficiency.

Since the inner diameter ratio of the pipe through which the gas flows in the heating portion 11 is relatively small, it is impossible to provide a heat conducting structure inside the pipe, and therefore, in the present embodiment, the heat conducting member 116 is provided inside the housing 110, and the heat conducting member 116 is connected to the heat generating member 112, and surrounds the pipe through which the gas flows or is in contact with the pipe through which the gas flows, so as to increase the heat transfer efficiency, so that the gas flowing through can be sufficiently heated in the flowing process.

In order to increase the heat transfer efficiency, the heat conduction member 116 in this embodiment has a bent portion 117, and the heat conduction member 116 is disposed in the housing 110 at regular intervals. Specifically, the heat conducting member 116 is fixed to the supporting member 118, and when the heat conducting member 116 is installed, the supporting member 118 fixes the heat conducting member 116 in a pipe through which gas flows in the heating portion 11, and the bent portion 117 is provided on the heat conducting member 116, so that the flowing gas flows in an S-shape, the path of gas heating is extended, and the gas can be heated more efficiently and more rapidly. Specifically, the bent portion 117 is bent at an angle of 45 °. Preferably, the heat conducting member 116 is a copper sheet, which can conduct heat rapidly and efficiently.

According to the embodiments, the air inlet device provided by the utility model can avoid the situation that the gas entering is insufficient or excessive through the combined arrangement of the control part and the heating part, the stability of the internal air pressure and the gas flow rate of the whole air inlet device is ensured, and a relatively stable gas raw material is provided for subsequent equipment, and the heating part can continuously and reliably heat the gas flowing through, so that the gas is ensured to be maintained in a stable temperature range, and the situation that the gas is decomposed or crystallized and condensed is avoided.

In summary, the above-mentioned embodiments are provided only for illustrating the principles and effects of the present invention, and not for limiting the present invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. An air inlet device for delivering a gas, comprising:

the control part is connected with the gas supply equipment and is used for controlling the gas flow;

a heating part communicated with the control part and used for heating the gas flowing through, wherein,

the control part comprises an air inlet pipeline and a pressure regulating device, the air inlet pipeline is connected with the air supply equipment through an air inlet, the pressure regulating device is arranged on the air inlet pipeline and is used for controlling the flow of the entering air,

the heating part is connected with the air inlet pipeline and outputs heated gas through the air outlet.

2. An air inlet arrangement as claimed in claim 1, wherein the air inlet duct is further provided with a backup air inlet, which backup air inlet is also connected to the air supply means for backup air supply.

3. The air inlet device as claimed in claim 1, wherein the air inlet pipeline is further provided with an electromagnetic valve, a mass flow meter and a pressure gauge, the electromagnetic valve is used for controlling the on-off of the air inlet pipeline, the mass flow meter is used for monitoring the flow rate of the gas in the air inlet pipeline, and the pressure gauge is used for monitoring the pressure of the gas in the air inlet pipeline.

4. The intake apparatus of claim 1, wherein the heating portion includes a housing, a heat generating member and a heat retaining member, the heat generating member and the heat retaining member being disposed within the housing for heating and retaining the gas flowing therethrough.

5. The air intake apparatus of claim 4, wherein the heat generating element includes a thermocouple and a heat generating coil, the heat generating coil being disposed within the housing, the thermocouple being disposed within the air outlet.

6. The intake apparatus of claim 5, wherein the heating part further includes a heat-conducting member provided in the housing and connected to the heat generating member for increasing heat transfer efficiency.

7. The intake apparatus as claimed in claim 6, wherein the heat-conducting member is provided with bent portions, and the heat-conducting member is disposed in the housing at regular intervals.

8. The air intake apparatus of claim 6, wherein the heat conducting member is a copper sheet and the heat generating ring is a ceramic heat generating ring.