CN2483676Y

CN2483676Y - Hot wind steam drying device

Info

Publication number: CN2483676Y
Application number: CN 01240767
Authority: CN
Inventors: 何清鑑
Original assignee: XINGLONG MACHINERY FACTORY LUNJIAO TOWN SHUNDE CITY
Current assignee: XINGLONG MACHINERY FACTORY LUNJIAO TOWN SHUNDE CITY
Priority date: 2001-06-01
Filing date: 2001-06-01
Publication date: 2002-03-27
Anticipated expiration: 2011-06-01

Abstract

The utility model relates to a hot air steam drying device for wood/piece dryness, comprising a combustion furnace and a drying chamber. Center of a steam occurrence water tank is provided with a secondary heat exchanger. Connecting point of a furnace preheating jacket periphery and hot air dissection channel is provided with a thermal compensation mechanism. Due to the secondary heat exchanger, the drying device is reasonable in integral heating and reduces thermal deformation; the residual heat of smoke exhausting channel is used fully, with the smoke exhausting temperature reduced. Furthermore, the thermal compensation mechanism and the outer layer hot air channel of the device can expand automatically when thermal expansion or cold shrinkage happen, with the advantages of no limitation of compensation scope, simple structure, safety and reliability, etc.

Description

The hot blast vapor drying plant

The utility model relates to a kind of hot blast vapor drying plant, mainly is applicable to the drying of timber/part.

In the prior art, as No. 95237682.2, Chinese patent disclosed " multi-functional calandria hot-air drying stove ", it is made of hopper, fire door, grate, body of heater, chimney, airduct group, fire tube group, boiler, case cover etc., high-temperature furnace gas passes through in the airduct outside, fire tube inside, boiler the rear flank and discharges from chimney, air blasts from air blast, flow through the fire tube outside, airduct inside, the hot blast of formation concentrates row to drying shed from the case cover.It is in the easy scaling loss of airduct group in high temperature corrosion district, and maintenance is frequent, and maintenance cost is bigger.Deficiency such as in addition, existing like product also exists the temperature compensation structure of heat exchanger still unsatisfactory, the quantity of steam deficiency, the exhaust gas temperature that are used to regulate humidity of media are too high, heat energy is not fully utilized.The utility model also be to our factory's patent No. be 98233717.5, name is called the further improvement of " hot blast vapor drying plant " and perfect.

The purpose of this utility model aims to provide a kind of rational in infrastructure, the thermal efficiency is high, long service life, the indirect hot blast of employing combine with atmospheric steam hot blast vapor drying plant, to overcome the deficiencies in the prior art part.

A kind of hot blast vapor drying plant that mainly is applicable to timber/part drying by this purpose design comprises the combustion furnace of being made up of steam generator water tank, centrifugal blower, steam triple valve, the chimney of flue and top thereof; The hothouse that links to each other with combustion furnace by warm-air pipe and backwind tube; Its architectural feature is that the central authorities of steam generator water tank are provided with the secondary heat exchange device; The junction of the periphery of flue and hot blast sandwich passage is provided with temperature compensation mechanism.

The top of described secondary heat exchange device is connected with chimney, and the below communicates with flue; And be provided with a plurality of branched bottoms up and down between the choke coil.Described temperature compensation mechanism is provided with circular gap between the upper end of hot blast sandwich passage and the furnace outer wall, is to separate extension type to connect; And be provided with asbestos seal ring and gland thereof.

This dry device has following effect owing to adopt unique secondary heat exchange device through facts have proved:

1) can improve the temperature of flue epimere, the temperature difference of dwindling upper and lower section of flue, integral body is heated rationally, thereby reduces thermal deformation; Improve rate of heat exchange for the first time simultaneously, air themperature can be promoted rapidly.

2) waste heat that can make full use of smokejack satisfies the needs of Wood drying technique to increase steam production; This heat exchanger top also can be heated saturated vapor again, prevents condensing reflux.

3) reduce exhaust gas temperature, reduced graininess powder in the flue gas, and avoided the chimney breast magnitude phenomenon of burning with anger.

In addition, the temperature compensation mechanism of this dry device can stretch flue and outer hot-air channel voluntarily when expanding with heat and contract with cold, and has characteristics such as compensation range is unrestricted, simple in structure, safe and reliable.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is embodiment master's TV structure schematic diagram;

Fig. 2 is the plan structure schematic diagram of Fig. 1;

Fig. 3 is the A-A sectional structure enlarged diagram among Fig. 1;

Fig. 4 is the D-D sectional structure schematic diagram among Fig. 1;

Fig. 5 is the B-B cross-section structure enlarged diagram among Fig. 3;

Fig. 6 is the C-C cross-section structure enlarged diagram among Fig. 3;

Fig. 7 is the E place structure enlarged diagram among Fig. 3.

Referring to Fig. 1, Fig. 2, Fig. 4, this hot blast vapor drying plant comprises the vertical shaft furnace of being made up of combustion chamber 1, fire door 2, flue 3, steam triple valve 4, centrifugal blower 5, temperature compensation mechanism 6, steam generator water tank 7, secondary heat exchange device 23, chimney 8, atmospheric steam pipe 9 and hot blast sandwich passage 24.Hothouse 20 is made of insulated building body 14, air hole 12, axial flow blower 13, deflector 15, thermal insulating door thermally insulated door 16, pull bar 17, thermometer 18, warm-air pipe 21 and electric control box 22.Combustion furnace and hothouse are connected by warm-air pipe 21 and backwind tube 11.10 is that gate valve, 19 is the timber heap among the figure.

Referring to Fig. 3, above flue, be provided with steam generator water tank 7, the central authorities of water tank are provided with secondary heat exchange device 23; The top of heat exchanger is connected with chimney 8, and the below communicates with flue 3; And be provided with four axial cylindrical shape branched bottom 23-2 (referring to Fig. 6) up and down between choke coil 23-3, the 23-1.Branched bottom is generally 2-8.The surface of secondary heat exchange device upper end 23-5 is provided with many convex tendon 23-4 (referring to Fig. 5) that increase heat transfer surface area.The junction of the periphery of flue 3 and hot blast sandwich passage 24 upper ends is provided with temperature compensation mechanism 6.This mechanism is provided with circular gap between the upper end of hot blast sandwich passage 24 and flue 3 outer walls, is to separate extension type to connect; And be provided with asbestos seal ring 6-1 and gland 6-2 (referring to Fig. 7) thereof.Also can remove the choke coil 23-1 of lower floor, branched bottom 23-2 is directly communicated with flue 3.

Present embodiment is a fuel with wood particulates such as wood shavings, sawdust, adopts indirect hot-air seasoning, middle temperature backflow (or not refluxing) drying process.By centrifugal blower 5 air is blown into flue, air is imported hothouse 20 after heating, and the 13 forced air convection heat transfer' heat-transfer by convection of the axial flow blower in airslide carry out drying to timber and handle again.Supply with the normal pressure saturated vapors by steam generator water tank efficiently 7, steam can directly spray into hothouse by steam spray pipe, enters hothouse after also can importing warm-air pipe 21 and hot blast mixes, so that the humidity of adjusting medium.When not needing steam, can be by steam triple valve 4 steam evacuation.By the airslide that deflector 15 constitutes, can quicken the heat conduction, make the drying of wood even, thereby shorten arid cycle and guarantee dry mass.Dense rib type heat exchanger 23 and secondary heat exchange device 7 volumes are less, but by the effect of convex tendon and choke coil heat transfer area are greatly increased, and the thermal efficiency is high and more stable, can reach required wind-warm syndrome in the short period of time.Low, the dry expense of its energy consumption is few, economical and practical.Present embodiment is for burning the bavin type, and also can make with coal, electricity, wet goods is the type of furnace of thermal source.

Another embodiment of the present utility model: a kind of hot blast vapor drying plant that is applicable to timber/part drying comprises the combustion furnace of being made up of steam generation water tank, centrifugal blower, steam triple valve, the chimney of flue and top thereof; The central authorities of its steam generation water tank are provided with the secondary heat exchange device; The top of secondary heat exchange device is connected with chimney, and the below communicates with flue; And be provided with a plurality of branched bottoms up and down between the choke coil.The structure of its secondary heat exchange device is identical with first embodiment.

Another embodiment of the present utility model: a kind of hot blast vapor drying plant that is applicable to timber/part drying comprises the combustion furnace of being made up of steam generation water tank, centrifugal blower, steam triple valve, the chimney of flue and top thereof; The junction of the periphery of its flue and hot blast sandwich passage is provided with temperature compensation mechanism; Be provided with circular gap between the upper end of its hot blast sandwich passage and the furnace outer wall, connect for separating extension type; And be provided with asbestos seal ring and gland thereof.Its temperature compensation mechanism is identical with first embodiment.

Claims

1. a hot blast vapor drying plant that is applicable to timber/part drying comprises the combustion furnace of being made up of steam generator water tank (7), centrifugal blower (5), steam triple valve (4), the chimney (8) of flue (3) and top thereof; The hothouse (20) that links to each other with combustion furnace by warm-air pipe (21) and backwind tube (11); The central authorities that it is characterized in that the steam generator water tank are provided with secondary heat exchange device (23); The junction of the periphery of flue and hot blast sandwich passage (24) is provided with temperature compensation mechanism (6).

2. hot blast vapor drying plant according to claim 1 is characterized in that the top of described secondary heat exchange device (23) is connected with chimney (8), and the below communicates with flue (3); And be provided with a plurality of branched bottoms (23-2) between the choke coil (23-3,23-1) up and down.

3. hot blast vapor drying plant according to claim 1 is characterized in that the top of described secondary heat exchange device (23) is connected with chimney (8), and the below communicates with flue (3); And last choke coil (23-3) below is provided with a plurality of branched bottoms (23-2).

4. according to claim 2 or 3 described hot blast vapor drying plants, it is characterized in that described branched bottom is an axial cylindrical shape passage, be generally 2-8.

5. hot blast vapor drying plant according to claim 1 and 2 is characterized in that the surface of described secondary heat exchange device upper end (23-5) is provided with many convex tendons (23-4) that increase heat transfer surface area.

6. hot blast vapor drying plant according to claim 1 is characterized in that described temperature compensation mechanism (6) for being provided with circular gap between the upper end of hot blast sandwich passage (24) and flue (3) outer wall, connects for separating extension type; And be provided with asbestos seal ring (6-1) and gland (6-2) thereof.

7. a hot blast vapor drying plant that is applicable to timber/part drying comprises the combustion furnace of being made up of steam generation water tank, centrifugal blower, steam triple valve, the chimney of flue and top thereof; The central authorities that it is characterized in that the steam generation water tank are provided with the secondary heat exchange device; The top of secondary heat exchange device is connected with chimney, and the below communicates with flue; And be provided with a plurality of branched bottoms up and down between the choke coil.

8. a hot blast vapor drying plant that is applicable to timber/part drying comprises the combustion furnace of being made up of steam generation water tank, centrifugal blower, steam triple valve, the chimney of flue and top thereof; It is characterized in that the periphery of flue and the junction of hot blast sandwich passage are provided with temperature compensation mechanism; Be provided with circular gap between the upper end of its hot blast sandwich passage and the furnace outer wall, connect for separating extension type; And be provided with asbestos seal ring and gland thereof.