CN205024309U - Gyration nitriding furnace - Google Patents
Gyration nitriding furnace Download PDFInfo
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- CN205024309U CN205024309U CN201520784043.3U CN201520784043U CN205024309U CN 205024309 U CN205024309 U CN 205024309U CN 201520784043 U CN201520784043 U CN 201520784043U CN 205024309 U CN205024309 U CN 205024309U
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- furnace
- heater
- nitriding furnace
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- nitrogen
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Abstract
The utility model relates to a gyration nitriding furnace, including gyration nitriding furnace furnace body, the material feeding unit who installs at the furnace end, the nitrogen gas input device of furnace body conversion zone, the cooling device of furnace body cooling zone, material feeding unit adopts screw conveyer, and nitrogen gas input device utilizes the gyration nitriding furnace soaking zone to heat the nitrogen gas that gets into the conversion zone, and cooling device adopts cooling coil to replace current water jacket structure. Improve through the aforesaid, this gyration nitriding furnace can effectively reduce furnace charge and nitrogen gas to the temperature of reaction in furnace section, improved reaction efficiency and product quality, reduced the energy consumption, have characteristics such as rational in infrastructure, efficiency of heat transfer height.
Description
Art
The utility model relates to a kind of revolution nitriding furnace.
Background technology
Existing revolution nitriding furnace primarily of body of heater, be arranged on revolution nitriding furnace burner pay-off, be arranged on body of heater conversion zone nitrogen inlet device, be arranged on the refrigerating unit of body of heater cooling section and be arranged on the discharge port composition of stove tail.
Existing burner pay-off adopts axially in stove, to blow nitrogen along burner, blowed furnace charge in stove by nitrogen.The nitrogen axially being blowed furnace charge by burner can cause furnace pressure to increase, the induced draft fan of stove tail must be relied on to be discharged by nitrogen superfluous in stove, a large amount of furnace charges and heat will be taken out of like this, production cost is caused to increase, energy consumption is high, time simultaneously with nitrogen conveying furnace charge, need according to the input amount of the response behaviour adjustment furnace charge in stove, so just need to adjust the flow velocity of nitrogen and flow to carry out the adjustment of furnace charge input amount, because the temperature of nitrogen and furnace charge is lower, the fluctuation of nitrogen flow rate and flow will bring the fluctuation of in-furnace temperature, directly have influence on the reaction times of material and the quality of product in stove.
Existing nitrogen inlet device nitrogen is delivered to by the air distributing device of nitrogen input terminus the conversion zone turning round nitriding furnace by air shooter, by nitrogen enter furnace apparatus will nitrogen distribute after be blown into conversion zone in stove along body of heater radial direction, participate in nitrogenizing reaction directly.
Nitrogenizing reaction in revolution nitriding furnace carries out under fluorite or calcium chloride, sodium-chlor etc. do the condition of catalyzer, and the temperature of reaction of its best is at 1000-1100 DEG C.The condition maintaining optimal reaction temperature is the nitrogenizing reaction speed adding material in heat and stove, and nitrogen amount is sufficient, and nitrogenizing reaction speed is fast, and in-furnace temperature is high, otherwise in-furnace temperature is then low.In-furnace temperature is too high can there is side reaction, and the too low nitrogenizing reaction speed of temperature reduces, free calcium carbide residual in product can be very high, this not only affects the consumption of quality product and raw material, energy, can cause product in use because free calcium carbide makes moist or meets water to produce a large amount of acetylene gas, bring the potential safety hazard of blast simultaneously.Therefore, this just requires that the temperature of conversion zone in nitriding furnace should stably remain between 1000-1100 DEG C.And the nitrogen entering revolution nitriding furnace conversion zone is at present the conversion zone directly entering nitriding furnace without preheating, the nitrogen flow simultaneously entering conversion zone regulates according to reaction in furnace situation, after the nitrogen that such temperature is lower directly enters revolution nitriding furnace conversion zone, the fluctuation of furnace temperature in conversion zone will be caused, and along with the change of nitrogen flow, furnace temperature change increases, this carrying out smoothly not only bad for nitrogenizing reaction, furnace wall also can be caused to tie wall serious, and then bring quality product to decline, consumption of calcium carbide increases, the series of problems such as labor intensity of operating staff increasing.
Existing refrigerating unit on the periphery of cooling section, is provided with cooling water chuck cool, to reduce drop temperature.Because the temperature when furnace charge in nitriding furnace enters cooling section is about more than 900 DEG C, this absorption with regard to needing a large amount of water coolants to carry out heat.And in the process that passes in and out at current of this type of cooling of water jacket, dead angle can be produced in chuck, make cooling section furnace body temperature uneven on the one hand, cooling section body of heater is caused to be out of shape and reduction in work-ing life, on the other hand because the flow velocity of water coolant in water jacket is uneven, the water coolant causing flow velocity slower forms cooling dead angle in water jacket, when after the water coolant water vapor in cooling dead angle, the pressure in water jacket will be caused to raise rapidly, water jacket is burst, light then the water inlet pipe and water outlet pipe of nitriding furnace water coolant is collapsed out, heavy then nitriding furnace cooling section cooling jacket is out of shape, chuck more seriously can be made to break, the generation that will set off an explosion once water coolant and furnace charge meet.Manufacturer is just had to bleed the example of accident of blasting in stove because of jacket water (J.W.) at home, simultaneously because the space in water jacket is comparatively large, comparatively difficult to the process of incrustation scale in it.
In sum, all there is the defect of the aspect such as technique, structure to the device of convey materials in stove, the nitrogen inlet device of conversion zone and the refrigerating unit of body of heater cooling section in the nitrogen that utilizes of existing revolution nitriding furnace, safety, the High-efficient Production of impact revolution nitriding furnace.
Summary of the invention
The purpose of this utility model is the defect overcoming prior art existence, the structure of the refrigerating unit of the revolution feeding style of burner pay-off of nitriding furnace, the nitrogen inlet device of body of heater conversion zone and body of heater cooling section improved, the temperature fluctuation amplitude of reaction in furnace section can be effectively reduced, reduce the one revolution nitriding furnace be produced into.
For achieving the above object, the technical solution of the utility model is: a kind of revolution nitriding furnace, comprise revolution nitriding furnace body of heater, be arranged on the pay-off of burner, the nitrogen inlet device of body of heater conversion zone, the refrigerating unit of body of heater cooling section, it is characterized in that the pay-off being arranged on burner is made up of the sleeve pipe installed perpendicular to the furnace wall on burner and the worm conveyor be sleeved in sleeve pipe, one end of sleeve pipe is positioned at furnace wall body of heater side and stretches out furnace wall, the other end of sleeve pipe is positioned at the outer side of furnace wall body of heater, sealing flange is fixed with in the box face being positioned at the outer side of furnace wall body of heater, the transfer lime of worm conveyor is sleeved on sleeve pipe inherence, the transfer lime of worm conveyor is fixed with the flange matched with sealing flange, between above-mentioned two flanges, gasket is installed,
The air distributing device that the nitrogen inlet device of body of heater conversion zone enters furnace apparatus and nitrogen input terminus by nitrogen forms, the body of heater periphery of the revolution nitriding furnace holding-zone between the air distributing device entering furnace apparatus and nitrogen input terminus at nitrogen is fixed with heating coil, the inlet end of heating coil is connected with the air distributing device of nitrogen input terminus, and outlet and the nitrogen of heating coil enter furnace apparatus and is connected;
The refrigerating unit of body of heater cooling section is made up of the spiral coil cooling tube be fixed on nitriding furnace cooling section periphery, and spiral coil cooling tube water-in is connected with water feed apparatus, and the water outlet of spiral coil cooling tube is connected with discharging device
Seal fixing between the furnace wall of the outer face, garden of the sleeve pipe in above-mentioned pay-off and revolution nitriding furnace burner, above-mentioned gasket is graphite grazing pad.
Heating coil in the nitrogen inlet device of above-mentioned body of heater conversion zone is, and to be semicircular semi-circular tube by cross section weld with the body of heater periphery of revolution nitriding furnace holding-zone the spirrillum seal channel formed afterwards.
Spiral coil cooling tube in the refrigerating unit of above-mentioned body of heater cooling section is the close passage of spirrillum formed after semicircular semi-circular tube welds with nitriding furnace cooling section body of heater periphery by cross section.
The material of above-mentioned heating coil is identical with the body of heater periphery material of holding-zone in revolution nitriding furnace.
The material of above-mentioned spiral coil cooling tube is identical with the material of the body of heater periphery of nitriding furnace cooling section.
The close passage of duplex shape that above-mentioned spiral coil cooling tube is formed by two semi-circular tubes and nitriding furnace cooling section body of heater periphery forms
The feature of the technical solution of the utility model: 1, utilize the mode of helical feed to instead of the mode of nitrogen of the prior art conveying furnace charge, existing stove tail induced draft fan and dust removal installation can be saved, reduce investment and maintenance cost, material is directly delivered in body of heater by worm conveyor simultaneously, the eddy flow formed by reaction atmosphere in body of heater drives to reaction zone, effectively can reduce the fluctuation of in-furnace temperature, improve reaction efficiency and quality product; And there is structure simply, on in-furnace temperature to affect the features such as little; 2, the body of heater surface heat of revolution nitriding furnace holding-zone is utilized, preheating is carried out to the nitrogen entering revolution nitriding furnace conversion zone, make to enter conversion zone nitrogen temperature and be increased to more than 300 DEG C by current 50-80 DEG C, low temperature nitrogen and nitrogen flow thereof can be effectively reduced on the one hand and change temperature fluctuation amplitude in the nitriding furnace conversion zone that brings, the thermosteresis of turning round nitriding furnace can be effectively reduced on the other hand; Because the fluctuating range of reaction in furnace section temperature reduces, to raising, reduction energy consumption, raw material consumption and the minimizing labor intensity of operating staff of quality product, there is extraordinary effect; 3, existing revolution nitriding furnace cooling section water-cooling structure is improved, the helical channel of the sealing formed by the outer round surface of the spiral tube that is semicircle by cross section and nitriding furnace cooling section replaces water leg structure, on the one hand because flow velocity is very fast, the heat that water coolant absorbs increases.Through measuring and calculating compared with the existing water jacket type of cooling, adopt the water coolant of identical amount, the temperature of cooling water outlet, by about 60 DEG C, is increased to about 80 DEG C; On the other hand due to the spiral tube cooling channel of semicircle, water coolant by time flow velocity all use unanimously, to solve in current water leg structure because water coolant flow velocity is uneven, cause stream water coolant in water jacket, form the problem cooling dead angle; 3rd, the process of this structure to the incrustation scale of the pipe spiral cooling channel of semicircle is convenient.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of the utility model pay-off;
Accompanying drawing 2 is the structural representation of the utility model nitrogen inlet device;
Accompanying drawing 3 is the left view of the utility model accompanying drawing 2;
Accompanying drawing 4 is the I partial enlarged drawing of the utility model accompanying drawing 2;
Accompanying drawing 5 is the structural representation of the utility model refrigerating unit;
Accompanying drawing 6 is the B partial enlarged drawing of the utility model accompanying drawing 5.
Embodiment
Pay-off as shown in Figure 1, the furnace wall 9 of revolution nitriding furnace burner is provided with sleeve pipe 10 perpendicular to furnace wall, the right-hand member of sleeve pipe is positioned at the body of heater on the right side of furnace wall body of heater and stretches out furnace wall, the left end of sleeve pipe is positioned at outside the body of heater on the left of furnace wall, sealing flange 8 is fixed with in the left side of sleeve pipe, the transfer lime 4 of worm conveyor is sleeved in sleeve pipe, the transfer lime of worm conveyor is fixed with the flange 6 matched with sealing flange, between above-mentioned two flanges, gasket 7 is installed, seals fixing between the face, outer garden of sleeve pipe and the furnace wall of revolution nitriding furnace burner.The transfer lime of worm conveyor is provided with opening for feed 3, opening for feed is connected with feed bin.During use, motor 1 drives the screw shaft 5 of worm conveyor to rotate by speed reduction unit 2, material in opening for feed is pushed in revolution nitriding furnace, because the furnace wall of revolution nitriding furnace burner rotates with rotary kiln, and worm conveyor is fixed on burner front end, by defining rotary seal between the sealing flange on the flange on the transfer lime of worm conveyor, gasket and sleeve pipe, ensure that the nitrogen atmosphere in stove.For ensureing gasket sealing effectiveness at high operating temperatures, gasket adopts graphite grazing pad.
Adjust inlet amount for convenience, the motor driving worm conveyor to rotate adopts frequency control motor.
Nitrogen inlet device as shown in Figure 2,3, in revolution nitriding furnace, the body of heater surface of holding-zone 13 is fixed with coil pipe 14, the air distributing device that coil pipe inlet end 15 inputs with existing revolution nitriding furnace nitrogen is connected, the outlet of coil pipe enters furnace apparatus 12 with existing revolution nitriding furnace nitrogen and is connected, and turns round the radially-arranged gas ejector pipe 16 of nitriding furnace conversion zone 11 in conversion zone for reaction nitrogen by edge.For increasing the amount of heat absorption of nitrogen in coil pipe, coil pipe is that the semi-circular tube be divided into two along its pipe along cross section by the pipe that the body of heater Facing material with holding-zone is identical is made, semi-circular tube is bent into spirrillum be welded on revolution nitriding furnace holding-zone 13 body of heater periphery 17 on form spirrillum seal channel, enter the nitrogen of revolution nitriding furnace conversion zone after spirrillum seal channel, carry out heat exchange with holding-zone periphery to be heated to after more than 300 DEG C, enter furnace apparatus by revolution nitriding furnace nitrogen and enter revolution nitriding furnace conversion zone, nitrogen after heating is after being the heat absorbing holding-zone, effectively can reduce the temperature fluctuation of conversion zone in revolution nitriding furnace.
The spiral pipe of semicircle shape selects identical material with holding-zone body of heater periphery, its objective is that to make the spiral pipe of semicircle shape consistent with the shrinking percentage of holding-zone periphery, prevent because the expand with heat and contract with cold weld bond of the spiral pipe that causes semicircle shape and cooling section outer round surface of holding-zone body of heater produces crack.
As shown in Figure 4, the cross section of coil pipe 14 is semicircle, adopts welded seal between the body of heater periphery 17 of coil pipe and holding-zone.
Refrigerating unit as shown in Figure 5,6, on the periphery of nitriding furnace cooling section 18, spirrillum is fixed with coil pipe 19, and the water-in 20 of coil pipe is connected with the water feed apparatus of existing nitriding furnace, and the water outlet 21 of coil pipe is connected with the discharging device of existing nitriding furnace.For increasing the amount of heat absorption of coil pipe inner cooling water, coil pipe is that the semi-circular tube be divided into two along its circular hollow section by the pipe that the body of heater Facing material with cooling section is identical is made, semi-circular tube being bent into spirrillum is welded on the body of heater periphery of nitriding furnace cooling section, Formation cross-section is the water coolant seal channel of semicircle, water coolant is entered by water-in, be that the spirrillum seal channel of semicircle rapidly flows through along cross section, discharged by water outlet, when water coolant flows through in the spirrillum seal channel of semicircle, heat exchange can be carried out with cooling section body of heater surface, the temperature of nitriding furnace cooling section is reduced rapidly, and its surface temperature is very all used, solve at present due to the water coolant vaporization problem that flow velocity inequality is formed in water jacket.
For better ensureing the cooling performance to nitriding furnace cooling section, the spiral pipe of semicircle shape can be two, duplex coil pipe is just defined like this at the outside surface of nitriding furnace cooling section, increasing is twice by the flow of water coolant, water coolant in the spiral pipe of semicircle shape in the residence time will reduce nearly half, the temperature in nitriding furnace cooling section so just can be made to reduce further.
The spiral pipe of semicircle shape selects identical material with cooling section body of heater periphery, its objective is that to make the spiral pipe of semicircle shape consistent with the shrinking percentage of cooling section periphery, prevent from causing coil pipe and generation crack, cooling section outer round surface face because cooling section body of heater expands with heat and contract with cold.
Claims (7)
1. a revolution nitriding furnace, comprise revolution nitriding furnace body of heater, be arranged on the pay-off of burner, the nitrogen inlet device of body of heater conversion zone, the refrigerating unit of body of heater cooling section, it is characterized in that the pay-off being arranged on burner is made up of the sleeve pipe (10) installed perpendicular to the furnace wall (9) on burner and the worm conveyor be sleeved in sleeve pipe, one end of sleeve pipe is positioned at furnace wall body of heater side and stretches out furnace wall, the other end of sleeve pipe is positioned at the outer side of furnace wall body of heater, sealing flange (8) is fixed with in the box face being positioned at the outer side of furnace wall body of heater, the transfer lime (4) of worm conveyor is sleeved on sleeve pipe (10) inherence, the transfer lime (4) of worm conveyor is fixed with the flange (6) matched with sealing flange, gasket (7) is installed between above-mentioned two flanges,
The air distributing device that the nitrogen inlet device of body of heater conversion zone enters furnace apparatus and nitrogen input terminus by nitrogen forms, the body of heater periphery (17) of the revolution nitriding furnace holding-zone (13) between the air distributing device entering furnace apparatus and nitrogen input terminus at nitrogen is fixed with heating coil (14), the inlet end of heating coil is connected with the air distributing device of nitrogen input terminus, and outlet and the nitrogen of heating coil enter furnace apparatus (12) and is connected;
The refrigerating unit of body of heater cooling section is made up of the spiral coil cooling tube (19) be fixed on nitriding furnace cooling section (18) periphery, and spiral coil cooling tube water-in (20) is connected with water feed apparatus, and the water outlet (21) of spiral coil cooling tube is connected with discharging device.
2. one revolution nitriding furnace according to claim 1, it is characterized in that sleeve pipe (10) face, outer garden in above-mentioned pay-off and seal between the furnace wall (9) of revolution nitriding furnace burner fixing, above-mentioned gasket (7) is graphite grazing pad.
3. one revolution nitriding furnace according to claim 2, the heating coil (14) that it is characterized in that in the nitrogen inlet device of above-mentioned body of heater conversion zone is that semicircular semi-circular tube welds with the body of heater periphery (17) of revolution nitriding furnace holding-zone (13) the spirrillum seal channel formed afterwards by cross section.
4. one revolution nitriding furnace according to claim 2, the spiral coil cooling tube (19) that it is characterized in that in the refrigerating unit of above-mentioned body of heater cooling section is that semicircular semi-circular tube welds the close passage of spirrillum formed afterwards with nitriding furnace cooling section (18) body of heater periphery by cross section.
5. one revolution nitriding furnace according to claim 3, is characterized in that the material of above-mentioned heating coil (14) is identical with body of heater periphery (17) material of holding-zone (13) in revolution nitriding furnace.
6. one revolution nitriding furnace according to claim 4, is characterized in that the material of above-mentioned spiral coil cooling tube (19) is identical with the material of the body of heater periphery of nitriding furnace cooling section (18).
7. one revolution nitriding furnace according to claim 6, is characterized in that the close passage of duplex shape that above-mentioned spiral coil cooling tube (19) is formed by two semi-circular tubes and nitriding furnace cooling section (18) body of heater periphery forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520784043.3U CN205024309U (en) | 2015-10-12 | 2015-10-12 | Gyration nitriding furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520784043.3U CN205024309U (en) | 2015-10-12 | 2015-10-12 | Gyration nitriding furnace |
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| Publication Number | Publication Date |
|---|---|
| CN205024309U true CN205024309U (en) | 2016-02-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520784043.3U Withdrawn - After Issue CN205024309U (en) | 2015-10-12 | 2015-10-12 | Gyration nitriding furnace |
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| Country | Link |
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| CN (1) | CN205024309U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105154814A (en) * | 2015-10-12 | 2015-12-16 | 贝利特化学股份有限公司 | Rotary nitriding furnace |
-
2015
- 2015-10-12 CN CN201520784043.3U patent/CN205024309U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105154814A (en) * | 2015-10-12 | 2015-12-16 | 贝利特化学股份有限公司 | Rotary nitriding furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160210 Effective date of abandoning: 20171215 |