CN220393878U - Gas flow control device for heat treatment container - Google Patents
Gas flow control device for heat treatment container Download PDFInfo
- Publication number
- CN220393878U CN220393878U CN202321712113.5U CN202321712113U CN220393878U CN 220393878 U CN220393878 U CN 220393878U CN 202321712113 U CN202321712113 U CN 202321712113U CN 220393878 U CN220393878 U CN 220393878U
- Authority
- CN
- China
- Prior art keywords
- gas
- air inlet
- mixing tank
- ammonia
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 16
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 95
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 33
- 238000000197 pyrolysis Methods 0.000 claims abstract description 30
- 238000004891 communication Methods 0.000 claims description 4
- 238000005336 cracking Methods 0.000 claims description 4
- 238000004868 gas analysis Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 116
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005121 nitriding Methods 0.000 description 2
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The application relates to a gas flow control device for a heat treatment container, which comprises an air inlet main pipe and a treatment unit, wherein an air inlet branch pipe is vertically connected to the air inlet main pipe, one end of the air inlet main pipe is provided with a pyrolysis gas inlet, and the other end of the air inlet main pipe is provided with a gas mixing tank; the gas mixing tank is convenient for mix ammonia and pyrolysis gas to and intake manifold and gas mixing tank's inner chamber tangent line is arranged, and the air current flows in entering gas mixing tank circulation and forms spiral air current, guarantees the intensive mixing of ammonia and pyrolysis gas, sets up the gas analysis appearance in the gas mixing tank in addition, adjusts the aperture of air throttle according to the concentration of ammonia, thereby reaches the purpose of controlling the ammonia concentration in the gas mixing tank.
Description
Technical Field
The application relates to the technical field of carburizing gas flow control, in particular to a gas flow control device for a heat treatment container.
Background
The traditional nitriding process is to put a workpiece in a furnace, introduce ammonia gas into the furnace at 500-550 ℃ for 20-100H, decompose the ammonia gas into (N) and (H) in an atomic state, and enable the (N) and metal to undergo chemical reaction to realize nitriding treatment, thereby obtaining high hardness of the surface of the workpiece, good fatigue resistance and corrosion resistance. After NH3 is decomposed, 70% of hydrogen and 30% of ammonia exist, the decomposition rate depends on the flow rate of NH3 and the temperature, the larger the flow rate is, the lower the decomposition rate is, the smaller the flow rate is, the higher the decomposition rate is, and the lower the decomposition rate is.
The carburization process detects the concentration of ammonia through a gas analyzer, and controls the mixed concentration of the entering ammonia and the pyrolysis gas through manually adjusting the size of a flow valve, and the two gases directly enter the furnace body through two pipelines, so that the mixing effect of the gases is poor and the concentrations of the ammonia and the pyrolysis gas cannot be automatically controlled.
Disclosure of Invention
In order to solve the problem that the ammonia gas and the pyrolysis gas are easy to mix unevenly and can't automatically adjust concentration at present, the application provides a gas flow control device for a heat treatment container, and the technical scheme who adopts is as follows:
the gas flow control device for the heat treatment container comprises an air inlet main pipe and a treatment unit, wherein the air inlet main pipe is vertically connected with an air inlet branch pipe, one end of the air inlet main pipe is provided with a pyrolysis gas inlet, and the other end of the air inlet main pipe is provided with a gas mixing tank; an ammonia gas inlet is formed in one end of the air inlet branch pipe, and a gas analyzer and a gas conveying pipe are arranged on the gas mixing tank; the inner cavity of the gas mixing tank is of a circular structure, and the air inlet main pipe is arranged along a tangent line of the inner cavity of the gas mixing tank; a narrow opening is formed in one end, close to a pyrolysis gas inlet, of the air inlet main pipe, one end of the air inlet branch pipe is communicated with the air inlet main pipe, a throttle valve is arranged at a communication position, and the air inlet branch pipe is arranged close to the narrow opening; the gas analyzer and the throttle valve are connected with the processing unit, and the processing unit controls the opening of the throttle valve to be in inverse proportion to the concentration of ammonia detected by the gas analyzer.
By adopting the technical scheme: the gas mixing tank is arranged to facilitate mixing of ammonia gas and pyrolysis gas, the air inlet header pipe is arranged tangentially to the inner cavity of the gas mixing tank, air flows into the gas mixing tank to circularly flow to form spiral air flow, full mixing of the ammonia gas and the pyrolysis gas is guaranteed, the gas analyzer is arranged in the gas mixing tank, and the opening of the throttle valve is adjusted according to the concentration of the ammonia gas, so that the purpose of controlling the concentration of the ammonia gas in the gas mixing tank is achieved.
The narrow opening comprises a choke block, and the inner wall of the air inlet main pipe is symmetrically connected with the choke block.
By adopting the technical scheme: because the air flow channel is reserved between the choke blocks, the air flow channel is narrowed through the choke blocks, the flow speed is increased, so that suction can be generated at one end of the air inlet branch pipe, ammonia is sucked into the gas mixing tank, and the quantity of the ammonia entering the tank can be adaptively adjusted by controlling the opening of the throttle valve.
The utility model discloses a gas mixing tank, including air inlet header pipe, a plurality of arc blades, a plurality of one-way circulation structure is equipped with in the air inlet header pipe, one-way circulation structure is equipped with a plurality of staggered arrangement's arc blade, and two adjacent arc blades are "people" and the directional gas mixing tank of one end of arc blade.
By adopting the technical scheme: because the arc blades are staggered, only air flow is allowed to flow along the cambered surface of the arc blades, and when the air flow faces the concave surface of the arc blades, the concave surface can be blocked, so that the unidirectional flow of air is realized.
The cracking gas inlet is connected with a cracking gas inlet pipe, the ammonia gas inlet is connected with an ammonia gas inlet pipe, and butterfly valves are arranged on the cracking gas inlet pipe and the ammonia gas inlet pipe.
By adopting the technical scheme: because the content of ammonia in the pyrolysis gas is less, can directly let in the air inlet main pipe, the air inlet branch pipe is used for getting into ammonia to inhale ammonia and adjust the concentration of ammonia, the content of entering ammonia is further adjusted through the throttle valve to the rethread, and the adjustability is high.
One end of the unidirectional circulation structure, which is close to the gas mixing tank, is provided with a front-end blade, the front-end blade is arranged along the radian of the inner wall of the gas mixing tank, and the arc-shaped blade is used for guiding the airflow into the inner cavity along the tangential direction of the inner wall of the gas mixing tank.
By adopting the technical scheme: the arc-shaped blade which is consistent with the radian of the inner cavity of the mixing tank is arranged at the joint of the gas mixing tank and the air inlet main pipe, so that air flow can enter the inner cavity of the gas mixing tank along the inner wall of the mixing tank, spiral air flow is formed, and gas mixing is promoted.
The gas analyzer is installed on the top of the gas mixing tank in the middle, and the gas conveying pipe is installed on the bottom of the gas mixing tank in the middle.
By adopting the technical scheme: install the bottom at the gas mixing tank with gas delivery pipe in the middle, because the air current is exported to the central authorities from the both sides in the jar, gas analyzer establishes in the middle at the mixing tank top, can improve the detection precision of analyzer greatly.
By adopting the scheme, the method has the following advantages:
because the gas flow control device for the heat treatment container comprises the air inlet main pipe and the air inlet branch pipes, the air inlet main pipe is used for entering pyrolysis gas, the air inlet branch pipes are used for entering ammonia gas, and the air inlet main pipe is arranged along the tangent line of the inner cavity of the gas mixing tank; one end of the air inlet branch pipe is communicated with the air inlet main pipe and is provided with a throttle valve at a communication position, air flows into the gas mixing tank to circularly flow to form spiral air flows, so that the full mixing of ammonia and pyrolysis gas is ensured, in addition, a gas analyzer is arranged in the gas mixing tank, and the opening of the throttle valve is adjusted according to the concentration of the ammonia, so that the purpose of controlling the concentration of the ammonia in the gas mixing tank is achieved.
Drawings
FIG. 1 is a schematic top view of a gas flow control device for a heat treatment vessel according to the present application;
fig. 2 is a schematic front view of a gas flow rate control device for a heat treatment vessel according to the present application.
Reference numerals illustrate: 1. an intake manifold; 11. a pyrolysis gas inlet; 12. a pyrolysis gas inlet pipe; 2. an air inlet branch pipe; 21. an ammonia gas inlet; 22. a throttle valve; 23. an ammonia gas inlet pipe; 3. a gas mixing tank; 4. a gas analyzer; 5. a gas delivery tube; 6. a unidirectional flow-through structure; 61. an arc-shaped blade; 62. front end blades; 7. a choke block; 8. butterfly valve.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-2.
As shown in fig. 1 and 2, the gas flow control device for a heat treatment container of the present application comprises an intake manifold 1 and a treatment unit, wherein one end of the intake manifold 1 is provided with a pyrolysis gas inlet 11, and the other end is provided with a gas mixing tank 3; an air inlet manifold 1 is vertically connected with an air inlet branch pipe 2, one end of the air inlet branch pipe 2 is provided with an ammonia air inlet 21, and the other end of the air inlet branch pipe is communicated with the air inlet manifold 1 and a throttle valve 22 is arranged at the communication position; be provided with gas analysis appearance 4 and gas conveyer pipe 5 on the gas mixing tank 3, gas analysis appearance 4 is used for detecting the content of in-tank ammonia, gas conveyer pipe 5 is used for sending into the stove with the mixed gas of ammonia and pyrolysis gas, the inner chamber of gas mixing tank 3 of this embodiment is circular structure, intake manifold 1 sets up in one side of gas mixing tank 3 and along the tangent line setting of gas mixing tank 3 inner chamber, gas can get into the jar along the tangent line of gas mixing tank 3 inner chamber in to form the spiral air current along the jar inner wall, improve the mixing effect of two kinds of gases.
As shown in fig. 1, a narrow opening is formed in one end, close to the pyrolysis gas inlet 11, of the air inlet manifold 1, the air inlet branch pipe 2 is arranged close to the narrow opening, and the flow speed of pyrolysis gas passing through the narrow opening is increased, so that suction force is generated near the air inlet branch pipe 2, and ammonia gas is sucked into the air inlet manifold 1; the gas analyzer 4 and the throttle valve 22 are both connected with the processing unit, the processing unit controls the opening of the throttle valve 22 to be in inverse proportion to the concentration of ammonia detected by the gas analyzer 4, when the gas analyzer 4 detects that the concentration of ammonia is high, the processing unit controls the opening of the throttle valve 22 to be reduced or closed, and the pyrolysis gas with low ammonia content enters the gas mixing tank 3, so that the function of adjusting the concentration of the mixed gas is realized.
The narrow opening comprises choke blocks 7, the inner wall of the air inlet main pipe 1 is symmetrically connected with the choke blocks 7, and an airflow channel is reserved between the choke blocks 7, the airflow channel is narrowed through the choke blocks 7, the flow speed is increased, so that suction can be generated at one end of the air inlet branch pipe 2, ammonia can be sucked into the gas mixing tank 3, and the amount of the ammonia entering the tank can be adaptively adjusted by controlling the opening of the throttle valve 22.
The utility model provides a still be equipped with unidirectional flow structure 6 in air intake manifold 1, can avoid the gas to flow backward, unidirectional flow structure 6 specifically includes a plurality of staggered arrangement's arc blade 61, two adjacent arc blades 61 are "people" shape and arrange, the directional gas mixing jar 3 of one end of arc blade 61, gas can flow smoothly along the cambered surface of arc blade 61, but when the gas is backward, the concave surface that the gas can strike arc blade 61 has the trend that blocks back, block through this concave surface of multiunit, can weaken the trend that the gas is backward flow greatly, thereby be blocked by the concave surface, finally realize the unidirectional flow of gas.
In addition, the one-way circulation structure 6 is equipped with front end blade 62 near the one end of gas mixing tank 3, and front end blade 62 sets up along the radian of gas mixing tank 3 inner wall, and this arc blade 61 is used for cutting the air current to guide into the inner chamber along gas mixing tank 3 inner wall, guarantees that the air current can get into the inner chamber that gets into gas mixing tank 3 along mixing tank inner wall to form the spiral air current, promote gas mixing.
In order to realize air intake, a pyrolysis gas inlet pipe 12 is connected to a pyrolysis gas inlet 11, an ammonia gas inlet pipe 23 is connected to an ammonia gas inlet 21, butterfly valves 8 are arranged on the pyrolysis gas inlet pipe 12 and the ammonia gas inlet pipe 23, a gas analyzer 4 is centrally installed at the top end of the gas mixing tank 3, and a gas conveying pipe 5 is centrally installed at the bottom end of the gas mixing tank 3. Install the bottom at gas mixing tank 3 with gas delivery pipe 5 in the middle, because the air current is exported to the central authorities from the both sides in the jar, gas analyzer 4 establishes in the middle at mixing tank top, can improve the detection precision of analyzer greatly.
Because the content of ammonia in the pyrolysis gas is less, can directly let in the air inlet main pipe, air inlet branch pipe 2 is used for getting into ammonia to inhale ammonia and adjust the concentration of ammonia, the throttle 22 of rethread further adjusts the content of getting into ammonia, and the adjustability is high.
The working process comprises the following steps: one end of the air inlet manifold 1 is filled with pyrolysis gas, the air inlet branch pipe 2 is filled with ammonia gas, the throttle valve 22 opens a small gap, the pyrolysis gas generates suction through a narrow opening, the ammonia gas in the air inlet branch pipe 2 is sucked into the air inlet manifold 1, reaches the gas mixing tank 3 through the unidirectional flow structure 6, is detected by the gas analyzer 4, and if the ammonia gas content is low, the throttle valve 22 increases the opening degree, and the mixed gas is sent into the furnace through the gas conveying pipe 5.
While the utility model has been described in connection with specific embodiments, it will be apparent to those skilled in the art that the description is intended to be illustrative and not limiting in scope. Various modifications and alterations of this utility model will occur to those skilled in the art in light of the teachings and the experience and principles of this utility model, and are intended to be within the scope of this utility model.
Claims (6)
1. The gas flow control device for the heat treatment container comprises an air inlet main pipe (1) and a treatment unit, and is characterized in that an air inlet branch pipe (2) is vertically connected to the air inlet main pipe (1), one end of the air inlet main pipe (1) is provided with a cracking gas inlet (11), and the other end of the air inlet main pipe is provided with a gas mixing tank (3); an ammonia gas inlet (21) is formed in one end of the air inlet branch pipe (2), and a gas analyzer (4) and a gas conveying pipe (5) are arranged on the gas mixing tank (3); the inner cavity of the gas mixing tank (3) is of a circular structure, and the air inlet main pipe (1) is arranged along a tangent line of the inner cavity of the gas mixing tank (3); a narrow opening is formed in one end, close to a pyrolysis gas inlet (11), of the air inlet main pipe (1), one end of the air inlet branch pipe (2) is communicated with the air inlet main pipe (1) and is provided with a throttle valve (22) at a communication position, and the air inlet branch pipe (2) is arranged close to the narrow opening; the gas analyzer (4) and the throttle valve (22) are connected with the processing unit, and the processing unit controls the opening degree of the throttle valve (22) to be in inverse proportion to the concentration of ammonia detected by the gas analyzer (4).
2. A gas flow rate control device for a heat treatment vessel according to claim 1, wherein the narrow opening comprises a choke block (7), and the choke block (7) is symmetrically connected to an inner wall of the intake manifold (1).
3. The gas flow control device for the heat treatment container according to claim 1 or 2, wherein a unidirectional flow structure (6) is arranged in the air inlet manifold (1), the unidirectional flow structure (6) is provided with a plurality of arc-shaped blades (61) which are arranged in a staggered manner, two adjacent arc-shaped blades (61) are arranged in a human shape, and one end of each arc-shaped blade (61) points to the gas mixing tank (3).
4. The gas flow control device for the heat treatment container according to claim 1 or 2, wherein the pyrolysis gas inlet (11) is connected with a pyrolysis gas inlet pipe (12), the ammonia gas inlet (21) is connected with an ammonia gas inlet pipe (23), and butterfly valves (8) are respectively arranged on the pyrolysis gas inlet pipe (12) and the ammonia gas inlet pipe (23).
5. A gas flow control device for a heat treatment vessel according to claim 3, wherein the one-way flow structure (6) is provided with a front end blade (62) at one end near the gas mixing tank (3), the front end blade (62) is disposed along the arc of the inner wall of the gas mixing tank (3), and the arc blade (61) is used for guiding the gas flow tangentially into the inner cavity along the inner wall of the gas mixing tank (3).
6. A gas flow control device for a heat treatment vessel according to claim 1, characterized in that the gas analyzer (4) is centrally mounted on the top end of the gas mixing tank (3), and the gas delivery pipe (5) is centrally mounted on the bottom end of the gas mixing tank (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321712113.5U CN220393878U (en) | 2023-07-03 | 2023-07-03 | Gas flow control device for heat treatment container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321712113.5U CN220393878U (en) | 2023-07-03 | 2023-07-03 | Gas flow control device for heat treatment container |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220393878U true CN220393878U (en) | 2024-01-26 |
Family
ID=89605078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321712113.5U Active CN220393878U (en) | 2023-07-03 | 2023-07-03 | Gas flow control device for heat treatment container |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220393878U (en) |
-
2023
- 2023-07-03 CN CN202321712113.5U patent/CN220393878U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN220393878U (en) | Gas flow control device for heat treatment container | |
| CN106640291A (en) | Ship waste gas denitration system | |
| CN209005699U (en) | A kind of methanol decomposition reactor | |
| CN112495182A (en) | Sludge incineration flue gas denitration system | |
| CN108686531B (en) | Simplified shell-and-tube fluid mixer | |
| CN113441023B (en) | Gas mixing mechanism, air inlet pipeline structure and semiconductor process equipment | |
| CN110314580A (en) | A kind of ammonium hydroxide mixing apparatus of boiler SNCR denitration | |
| CN111022222B (en) | Adjustable EGR hybrid system | |
| CN201596475U (en) | Coal mine gas injecting distribution system | |
| CN210660359U (en) | Air inlet pipe of integrated EGR (exhaust gas Recirculation) channel | |
| CN209362167U (en) | It is a kind of for handling the closed processes equipment of petrochemical equipment loss gas | |
| CN209026809U (en) | The system for reducing coke oven chimney exhaust gas nitrogen oxides | |
| CN112827335A (en) | Low NOXNatural gas hydrogen production process with flue gas emission | |
| CN111561407A (en) | Mixer | |
| CN218328144U (en) | Automatic adjustable gas premixer | |
| CN114392448B (en) | A circulation close-up anesthesia machine for anesthesia branch of academic or vocational study | |
| CN2889471Y (en) | Oxygen negative-ion liquid-saving device | |
| CN218501753U (en) | Oil field waste gas mixes wind diluting device | |
| CN215196305U (en) | Automatic slurry adjusting and controlling device for spray tower | |
| CN117904574B (en) | Surface nitriding treatment equipment of die | |
| CN215311424U (en) | Nitrogen oxide emission reducing device | |
| CN219691705U (en) | Suction muffler for compressor | |
| CN214200859U (en) | Sampling device applied to denitration CEMS (continuous emission monitoring system) of coal-fired power plant | |
| CN117919977B (en) | Gas mixing device | |
| CN209026838U (en) | Denitration of boiler smoke ammonium hydroxide regulating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A gas flow control device for heat treatment containers Granted publication date: 20240126 Pledgee: Bank of Nanjing Limited by Share Ltd. Wuxi branch Pledgor: TLON TECHNICAL FURNACES (WUXI) Co.,Ltd. Registration number: Y2024980008151 |