Explosion proof hot air blower-Fornitore globale

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Explosion proof hot air blower

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Product details

1. Working principle of explosion-proof hot air blower

The gas enters the inlet of the air duct heater through the hot air duct under the action of the fan, and follows a specific path designed according to the thermodynamic principle of heat dissipation inside the air duct heater, taking away a large amount of heat emitted from the surface of the electric heating element, and obtaining the gas temperature that meets the process requirements at the outlet of the explosion-proof hot air electric heater.

2. Structure of explosion-proof hot air electric heater:

(1) The electric heater is a vertical and movable structure, mainly composed of finned electric heating tube bundles, wiring chambers, fixed nets, and temperature control parts.

(2) The collection flange of the electric heating tube is made of Q235, which is fixed by welding with the electric heating tube.

A、 The production of electric heating elements and the dissipation of surface heat from electric heating tubes prioritize the use of fin winding form, which has excellent heat transfer effect.

The heating elements are connected to each other, the connecting conductors inside the tube are connected to each other, and the distance between them and the metal tube is greater than 2mm. The connecting conductors inside the tube and the heating elements are connected by crimping or brazing, and the minimum electrical clearance and minimum creepage distance are specified in Table 1 and Table 3 of GB3836.3-2000. The end of the metal tube is made of insulation material and fully insulated and moisture-proof treated. Type tests are conducted in accordance with the provisions of C.20.3 of GB3836.1-2000 "General Requirements for Explosion proof Electrical Equipment for Explosive Environments".

B、 The finned electric heating tube must withstand the following tests

(a) 1.1 times the rated voltage, with a cycle of 1 minute of power on and 4 minutes of power off at the rated frequency. Repeat the test and withstand the following AC voltage for 1 minute for dielectric strength test: 2E+1000 (2 times the rated voltage of the electric heater+1000V) with a minimum of 1440V, and conduct a high voltage test at 1500V.

(b) The dielectric strength test of the AC voltage shown is conducted by immersing the entire device in water for 25 minutes as a cycle, repeating the test for 50 cycles with 1.1 times the rated voltage and rated current for 5 minutes, and then placing it in the atmosphere for 40 minutes and enduring it for another minute.

(c) After being placed in a warm box with a relative humidity of 90 ± 5% at+40 ± 5 ℃ for 24 hours, immediately wipe off the surface moisture and measure the resistance value between the charged and non charged parts with a 500 volt megohmmeter, which must not be less than 10 megohms.

(d) At the rated operating voltage, the allowable deviation of the rated power of the component is ± 5%.

(e) At room temperature, the insulation resistance of the component shall not be less than 500M Ω.

(f) The component is allowed to operate under conditions where the voltage is greater than the rated value but not greater than 1.1 times the rated value.

(g) Other aspects of the components should comply with the technical specifications for tubular electric heating elements in JB2379-93.

(h) The internal electric heating elements of the electric heater require 100% testing.

C、 Manufacturing of finned electric heating tubes:

The wall thickness of the U-shaped finned electric heating tube with a diameter of 16 is 1.5mm, and the shell is made of 0Cr18Ni9Ti. High purity oxidized crystalline magnesium powder produced in Japan is selected as the magnesium powder; High temperature nickel chromium alloy wire is selected as the heating wire. By filling powder, vibrating powder, shrinking pipes, and bending pipes. Final test: Insulation resistance of single electric heating tube>500M Ω; assembled ≥ 200M Ω; high voltage test ≥ 1500V/min. Complies with the national standard GB3836.1-3-2000.

(3) Install a fixed mesh inside the shell to secure the electric heating element.

(4) The electric heater is equipped with a temperature controller that measures the temperature of the air outlet and is connected to an AC contactor temperature control module. Users only need to provide power to achieve temperature control and adjust the temperature of the hot air outlet.

3. Advantages:

a)、 Fast heating (using 2080 nickel chromium wire as the heating element)

b)、 High thermal efficiency

c)、 Safe, durable, and can be used continuously for 24 hours.

4. The hot air blower has the following functions:

a)、 Anti dry burning function;

b)、 Automatic temperature adjustment function;

c)、 Overtemperature alarm function;

d)、 Automatic protection function for motor overheating and overload;

f)、 Motor delay shutdown function,

Model Description:

Example:

1: HWG-PR5A3-018-22 (Practical circulating hot air blower, electric heating power of 5KW, power supply of 3-phase 380V, motor of 250W, type 2 chassis); Equipped with temperature control configuration

2: HWG-PR20A3-3-41 (practical circulating hot air blower, electric heating power of 20KW, power supply of 3-phase 380V, motor of 3KW, type 4 chassis); Equipped with temperature control configuration

Practical circulating hot air blower parameter table

model		HWG-PR3A1-006-11	HWG-PR3A1-018-12	HWG-PR5A3-006-21	HWG-PR5A3-018-22	HWG-PR5A3-025-23
Power supply 50Hz		Single phase 220V	Single phase 220V	Three phase 380V	Three phase 380V
Electric heating power		3 kW	3 kW	5 kW	5 kW
inlet air temperature		Room temperature~230 ℃	Room temperature~230 ℃	Room temperature~230 ℃	Room temperature~230 ℃
Air outlet temperature		Room temperature~450 ℃	Room temperature~350 ℃	Room temperature~450 ℃	Room temperature~350 ℃
Diameter of air outlet accessories		2″(φ57)	2″(φ57)	21/2″(φ76)	21/2″(φ76)	21/2″(φ76)
wind machine	power	60W	180W	60W	180W	250W
	Maximum air volume	3.5m3/min	6.7m3/min	3.5m3/min	6.7m3/min	8.4m3/min
	Maximum wind pressure	412Pa (full pressure)	450Pa (full pressure)	412Pa (full pressure)	450Pa (full pressure)	860Pa (full pressure)
noise		74dB	72 dB	74 dB	72 dB	74 dB
configuration		Power cord 3m long with heat-resistant fan
weight		20kg		30kg

model		HWG-PR7.5A3-006-24	HWG-PR7.5A3-018-25	HWG-PR7.5A3-025-26	HWG-PR10A3-025/055/075-31	HWG-PR15A3-025/055/075-32
Power supply 50Hz		Three phase 380V	Three phase 380V		Three phase 380V
Electric heating power		7.5 kW	7.5 kW		10 kW	15 kW
inlet air temperature		Room temperature~230 ℃	Room temperature~230 ℃		Room temperature~230 ℃
Air outlet temperature		Room temperature~450 ℃	Room temperature~350 ℃		Room temperature~350 ℃
Diameter of inlet/outlet accessories		3″	3″		3 "or 4"
wind machine	power	60W	180W	250W	250w/550W/750W
	Maximum air volume	3.5m3/min	6.7 m3/min	8.4m3/min	8.4m3/min / 14.5m3/min / 20.5m3/min
	Maximum wind pressure	412Pa (full pressure)	450Pa (full pressure)	860Pa (full pressure)	860Pa (full pressure)/1050Pa (full pressure)/1250Pa (full pressure)
Configuration		74 dB	72 dB	74 dB	76 dB
Configuration		Power cord 3m long with heat-resistant fan
weight		30kg			42kg

model		HWG-PR20A3-1.5-41	HWG-PR25A3-1.5-42	HWG-PR30A3-2.2-43		HWG-PR35A3-2.2-44	HWG-PR45A3-3-45	HWG-PR60A3-3-46
Power supply 50Hz		Three phase 380V		Three phase 380V			Three phase 380V
Electric heating power		2x10 kW	2x12.5 kW	2x15 kW	2x17.5 kW		2x22.5kW	2x30 kW
inlet air temperature		Room temperature~230 ℃/400 ℃		Room temperature~230 ℃/400 ℃			Room temperature~230 ℃/400 ℃
Air outlet temperature		Room temperature~350 ℃/500 ℃		Room temperature~350 ℃/500 ℃			Room temperature~350 ℃/500 ℃
Diameter of inlet/outlet accessories		4 "or 5"		5 "or 6"			6 "or 8"
wind machine	power	1.5kW		2.2kW			3.0kW
	Maximum air volume	23m3/min		24m3/min			25m3/min
	Maximum wind pressure	1.9kPa (total pressure)		2.1kPa (total pressure)			2.3 kPa (total pressure)
configuration		Power cord 3m long with heat-resistant fan
weight		124kg

Hot air blower parameter table

Model: HWG-PR3A1-006-11; HWG-PR3A1-018-12； HWG-PR5A3-006-21

HWG-PR5A3-018-22； HWG-PR5A3-025-23； HWG-PR7.5A3-006-24

HWG-PR7.5A3-018-25； HWG-PR7.5A3-025-26

dimension

model	A	B	C	D	E	F	G	H	I	J	K	L	M	N	P
HWG-PR3A1-006-11	268	192	340	274	196	89	50	262	100	90	90	77	192	150	195
HWG-PR3A1-018-12	268	192	340	274	196	89	50	262	100	125	135	87	196	150	305
HWG-PR5A3-006-21	380	202	388	386	206	133	50	293	100	90	90	77	192	150	195
HWG-PR5A3-018-22	380	202	388	386	206	133	50	293	100	125	135	87	196	150	305
HWG-PR5A3-025-23	380	202	388	386	206	133	50	293	100	125	135	110	154	150	305
HWG-PR7.5A3-006-24	380	202	388	386	206	133	50	293	100	90	90	77	192	150	195
HWG-PR7.5A3-018-25	380	202	388	386	206	133	50	293	100	125	135	87	196	150	305
HWG-PR7.5A3-025-26	380	202	388	386	206	133	50	293	100	125	135	110	154	150	305

Note: 006:60W; 018:180W; 025:250W motor

Model: HWG-PR10A3-025/055/075-31; HWG-PR15A3-025/055/075-32

dimension

model	A	B	C	D	E	F	G	H	I	J	K	L
HWG-PR10A3-025/055/075-31	502	240	440	120	326	120	80	340	102	121	108	110
									130	150	131	142
									130	150	131	142
HWG-PR15A3-025/055/075-32	502	240	440	120	267	120	80	340	102	121	108	110
									130	150	131	142
									130	150	131	142

Note: 250W/550W/750W motors

Model: HWG-PR20A3-1.5-41; HWG-PR25A3-1.5-42； HWG-PR30A3-2.2-43

HWG-PR35A3-2.2-44； HWG-PR45A3-3-45； HWG-PR60A3-3-46

Function indicator diagram

dimension

Model number	A	C	D	E	F	G	H	I	J	K	L	M	N
HWG-PR20A3-1.5-41	590	600	360	360	560	100	685	157	157	182	395	130	1200
HWG-PR25A3-1.5-42
HWG-PR30A3-2.2-43	590	600	360	360	560	100	685	157	157	182	395	130	1200
HWG-PR35A3-2.2-44
HWG-PR45A3-3-45	590	600	360	360	560	100	685	180	180	206	365	130	1200
HWG-PR60A3-3-46

Note: 1.5KW/2.2KW/3KW heat-resistant motor

Practical circulating hot air blower outlet size diagram (optional accessories)

model	A	B	C
HWG-PR3A1-006-11	φ57 /φ76	89	φ89
HWG-PR3A1-018-12
HWG-PR5A3-006-21	φ76 /φ89 /φ108	127	φ133
HWG-PR5A3-018-22
HWG-PR5A3-025-23
HWG-PR7.5A3-006-24
HWG-PR7.5A3-018-25
HWG-PR7.5A3-025-26
HWG-PR10A3-025/055/075-31
HWG-PR15A3-025/055/075-32
HWG-PR20A3-1.5-41	φ89 /φ108 /φ133 /φ159	152	φ219
HWG-PR25A3-1.5-42
HWG-PR30A3-2.2-43
HWG-PR35A3-2.2-44
HWG-PR45A3-3-45
HWG-PR60A3-3-46

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