CN2345927Y

CN2345927Y - Lumber drying machine

Info

Publication number: CN2345927Y
Application number: CN 98229133
Authority: CN
Inventors: 石世伦
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-07-16
Filing date: 1998-07-16
Publication date: 1999-10-27
Anticipated expiration: 2008-07-16

Abstract

The utility model relates to a lumber drying machine which comprises a vacuum pump 3 and a closed box 2 with a feeding door 1. The utility model is characterized in that a suction connecting device 4 is arranged between the closed box 2 and the vacuum pump 3, and an air inlet device 6 with a heater 5 is arranged in the closed box 2. The utility model has the advantages of simple structure, low device cost, short drying cycle, high drying quality, large drying capacity, low electric power consumption, etc., which is especially suitable for wood farms and various wood processing industries.

Description

Wood dryer

The utility model relates to a kind of solid drying device, particularly a kind of drying device to timber.

No matter present method for drying wood is aspect rate of drying, dry mass, still aspect the cost of used energy consumption of drying and drying equipment, all exist many deficiencies, now that existing drying mode and the main shortcoming division that exists thereof to timber is as follows:

1, air dry: this mode must be through the very long time in 1～2 year, and reaching incompatible modern production development needs;

2, heating, drying: this mode is to make timber heat temperature raising in drying room, must easily make the drying of wood inhomogeneous through the above time of two weeks, occurs phenomenons such as timber crack, song stick up often;

3, steam drying: the timber of this mode drying is comparatively even, but the dry time also must two weeks, the loose easily and variable color of the wood surface that is dried, and still have the generation of phenomenons such as more cracking, song stick up;

4, vacuum drying: it is under vacuum condition, is equipped with powerful electro-heat equipment timber is carried out heat drying; Though this mode drying efficiency is higher, be about eight days drying time, and its energy consumption is huge;

5, high frequency vacuum drying: it is under vacuum condition, is equipped with the high-frequency dielectric machine and heats; Though this mode efficient height, its drying capacity little (once can only dry 2 cubes of timber), the involving great expense of drying equipment, energy consumption is huge, should not be extensive use of.

The purpose of this utility model just provides a kind of simple in structure, drying wood dryer rapidly, and it can carry out drying by thermal air current to timber under vacuum condition.

The purpose of this utility model is to realize by such technical scheme, and it comprises the closed box and the vavuum pump of band feeding door, it is characterized in that: be provided with the jockey of bleeding between closed box and vavuum pump, be provided with the inlet duct of band heater in the closed box.

The moisture content of timber includes the Free water in water in the superficial water, vascular bundle, space between cells and intracellular in conjunction with water, and these moisture content make the moisture content of timber generally more than 35%, desiccated wood just these moisture content must be removed from timber as far as possible.

When utilizing the utility model desiccated wood, with the heap shipping unit timber that is dried is put into closed box by the feeding door earlier, close feeding door and each control valve relevant with closed box, make and be in closed state in the closed box, start vavuum pump, make by the jockey of bleeding that level of vacuum reaches more than the 0.06MPa in the closed box, close vavuum pump, at this moment, because of the timber internal pressure greater than the timber external pressure, force the timber superficial water, the water in the vascular bundle and the Free water in space between cells are overflowed to the timber outside, till timber inside and outside pressure is in balance, start heater and open inlet duct, outside air forms hot-air by heater and enters in the closed box, this moment the timber external pressure greater than the timber internal pressure, force hot-air to immerse in the vascular bundle of timber and in the space between cells, no matter timber is externally, still in inside, all heated equably, treat that vacuum is eliminated after, repeat aforesaid operations, till making airtight the temperature inside the box rise to more than 30 ℃ rapidly; Under this temperature conditions, start vavuum pump, make when vacuum remains at more than the 0.06MPa in the closed box, opened inlet duct 5～10 minutes, make thermal air current in closed box, scour each lumber layer, keep vacuum about half an hour then, when airtight the temperature inside the box rises to more than 30 ℃ again, repeat aforesaid operations again.So continued operation, materials such as a large amount of ester class that a large amount of moisture content that overflow from timber and following overflow, tannin, under heating and low pressure, evaporation rapidly, the steam that evaporates is constantly taken away by thermal current again, thereby accelerated the speed of taking off the ester drying of timber greatly, after three days, the Free water in water in timber superficial water, the vascular bundle and space between cells can be removed substantially, also removed in the small part wood cell in conjunction with water, the moisture content of timber is dropped to below 16%, can satisfy country fully the desired standard of the drying of wood.

Owing to adopted technique scheme, the utlity model has following advantage:

1, simple in structure, equipment manufacturing cost is low;

2, drying of wood cycle weak point, the efficient height only needs 3～5 day time;

3, timber is heated evenly, and is not prone to cracking and warping deformation, has guaranteed dry mass;

4, the closed box inwall is provided with heat-insulation layer, Temperature controlled heater can be controlled at the temperature in the closed box between 30 ℃～40 ℃, therefore, breath is opened vavuum pump and heater between only needing, just can reach the purpose of desiccated wood, power consumption is low, especially at temperature is 30 ℃ above summer, and is all the more so;

5, timber that once at least can dry 7 cubic metres, drying capacity is big.

Description of drawings of the present utility model is as follows:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural representation of closed box rear end;

Fig. 3 is the structural representation of feeding door;

Fig. 4 is the schematic diagram of heap shipping unit.

Among the figure: 1. feeding door; 2. closed box; 3. vavuum pump; 4. the jockey of bleeding; 5. heater; 6. inlet duct; 7. air outlet valve; 8. exhaust tube; 9. pipeline; 10 ventholes; 11. intake valve; 12. aspirating hole; 13. vacuum meter; 14. temperature regulating device; 15. heap shipping unit.

The utility model is described in further detail below in conjunction with drawings and Examples:

As shown in Figure 1, 2, the utility model includes the closed box 2 and the vavuum pump 3 of band feeding door 1, it is characterized in that: be provided with the jockey 4 of bleeding between closed box 2 and vavuum pump 3, be provided with the inlet duct 6 of band heater 5 in the closed box 2.

When utilizing the utility model desiccated wood, with heap shipping unit 15 timber that is dried is put into closed box 2 by feeding door 1 earlier, close feeding door 1 and each control valve relevant with closed box 2, make in the closed box 2 and be in closed state, start vavuum pump 3, by the jockey 4 of bleeding closed box 2 interior level of vacuum are reached more than the 0.06MPa, close vavuum pump 3, at this moment, because of the timber internal pressure greater than the timber external pressure, force the timber superficial water, the water in the vascular bundle and the Free water in space between cells are overflowed to the timber outside, till timber inside and outside pressure is in balance, start heater 5 and open inlet duct 6, outside air forms hot-air by heater 5 and enters in the closed box 2, this moment, the timber external pressure was greater than the timber internal pressure, force hot-air to immerse in the vascular bundle of timber and in the space between cells, no matter timber is externally, still in inside, all heated equably, after treating that vacuum is eliminated, repeat aforesaid operations, till temperature rises to more than 30 ℃ rapidly in making closed box 2; Under this temperature conditions, start vavuum pump 3, make when vacuum remains at more than the 0.06MPa in the closed box 2, opened inlet duct 5～10 minutes, make thermal air current in closed box 2, scour each lumber layer, keep vacuum about half an hour then, when temperature in the closed box 2 rises to more than 30 ℃ again, repeat aforesaid operations again.So continued operation, materials such as a large amount of ester class that a large amount of moisture content that overflow from timber and following overflow, tannin, under heating and low pressure, evaporation rapidly, the steam that evaporates is constantly taken away by thermal current again, thereby accelerated the speed of taking off the ester drying of timber greatly, after three days, the Free water in water in timber superficial water, the vascular bundle and space between cells can be removed substantially, also removed in the small part wood cell in conjunction with water, the moisture content of timber is dropped to below 16%, can satisfy country fully the desired standard of the drying of wood.

As shown in Figure 1, in order to strengthen the compression strength of closed box 2, closed box 2 is a horizontal cylindrical metal cylindrical shell, and feeding door 1 is arranged on of closed box 2.

As shown in Figure 1, 2, the jockey 4 of bleeding is the exhaust tubes 8 that have air outlet valve 7, and exhaust tube 8 one ends communicate with closed box 2, and the other end is connected with vavuum pump 3.

As shown in Figure 1, 2, in order to make the hot-air that enters closed box 2 be even injection, inlet duct 6 is the pipelines 9 by heater 5, the sealing of pipeline 9 one ends, and its end has many ventholes 10, and pipeline 9 other ends pass closed box 2 and are arranged on closed box 2 outsides by intake valve 11.

As shown in Figure 1, in order to make the thermal air current that enters closed box 2 can pass through whole timber, the venthole 10 of pipeline 9 is setting in opposite directions with the closed box 2 interior aspirating holes 12 that are connected with exhaust tube 8, that is to say, aspirating hole 12 is arranged near the timber of being placed on one side, and venthole 10 just should be arranged on the another side near timber.

As shown in Figure 1, heater 5 can be thermostat galvanothermy silk heating element, can reach the purpose of temperature in the automatic control closed box 2.

As shown in Figure 1, for the ease of observing the level of vacuum of closed box 2, closed box 2 is provided with vacuum meter 13.

As shown in Figure 1, for the ease of the temperature of control closed box 2, closed box 2 is provided with temperature regulating device 14.

In order not allow the thermal energy consumption in the closed box 2 too many, saves energy, closed box 2 inwalls are provided with heat-insulation layer.

Shown in Fig. 1,4, for the ease of stacking timber, save the labour, in closed box, be provided with timber heap shipping unit 15.

Claims

1, a kind of wood dryer, include the closed box (2) and the vavuum pump (3) of band feeding door (1), it is characterized in that: between closed box (2) and vavuum pump (3), be provided with the jockey of bleeding (4), be provided with the inlet duct (6) of band heater (5) in the closed box (2).

2, wood dryer as claimed in claim 1 is characterized in that: closed box (2) is a horizontal cylindrical metal cylindrical shell, and feeding door (1) is arranged on of closed box (2).

3, as claim 1,2 described wood dryers, it is characterized in that: the jockey of bleeding (4) is the exhaust tube (8) that has air outlet valve (7), and exhaust tube (8) one ends communicate with closed box (2), and the other end is connected with vavuum pump (3).

4, wood dryer as claimed in claim 3, it is characterized in that: inlet duct (6) is the pipeline (9) by heater (5), the sealing of pipeline (9) one ends, and its end has many ventholes (10), and pipeline (9) other end passes closed box (2) and is arranged on closed box (2) outside by intake valve (11).

5, wood dryer as claimed in claim 4 is characterized in that: the venthole (10) of pipeline (9) is setting in opposite directions with the interior aspirating hole (12) that is connected with exhaust tube (8) of closed box (2).

6, wood dryer as claimed in claim 4 is characterized in that: heater (5) is a thermostat galvanothermy silk heating element.

7, wood dryer as claimed in claim 4 is characterized in that: closed box (2) is provided with vacuum meter (13).

8, wood dryer as claimed in claim 4 is characterized in that: closed box (2) is provided with temperature regulating device (14).

9, wood dryer as claimed in claim 4 is characterized in that: closed box (2) inwall is provided with heat-insulation layer.

10, wood dryer as claimed in claim 4 is characterized in that: be provided with timber heap shipping unit (15) in closed box.