CN2251704Y - Reversing circulating hot-air kiln for drying timber - Google Patents

Abstract

The utility model relates to a reversing circulating hot-air kiln for drying wood, and the problems of low heat efficiency, bad wood drying quality, high drying cost, easy fire, etc. need to be solved in existing equipment. A hot air pipe is arranged in the kiln body of the utility model, circular current is generated by an axial flow machine, the heat of the circular current is absorbed, a draught fan is connected with the hot air pipe to make the internal of the hot air pipe form negative pressure to prevent fire, and a valve is arranged on the air inlet of the draught fan for controlling the temperature of the utility model. The utility model has the advantages of less investment, variable capacity, high heat efficiency, better wood drying quality, and safety.

Description

A kind of Reversible Cycle hot blast lumber kiln

The utility model relates to the hot blast timber dryer.

At present, Chang Yong timber dryer has steam drying kiln and heated-air drying kiln.It is complete that the former controls function, wood drying quality is good, but need configuration boiler and relevant device, investment is big, and steam is the secondary energy, the cost height: the latter as depicted in figs. 1 and 2, flue gas flows through from warm-air pipe, utilize air to flow naturally heat transferred timber carried out drying, the ventilation hydrofuge by cold air from air admission hole 6 enter in the kiln, hot and humid gas drains from upper air-vent 5 and carries out.This kiln heat is transmitted very slow, and the thermal efficiency is low, and wood drying quality is poor, and the timber price is relatively low, and easily on fire near the timber of warm-air pipe.Shown in Figure 3 is existing another kind of hot blast kiln, and hot-air enters in the kiln from warm-air pipe 4, and the circulating current that blows with axial flow blower 7 mixes, and timber is carried out drying, carries out the hydrofuge ventilation from steam vent 9; This hot blast kiln kiln temperature is low, wayward, and wood drying quality is poor, influences the timber price, and discharges hot-air in a large number, and heat-energy losses is big, production cost height, the fiery phenomenon of ating fault.

It is less that the purpose of this utility model provides a kind of investment, has kiln temperature control function, and dry mass is good, thermal efficiency height, and drying cost is low, safe and reliable timber dryer.

The purpose of this utility model is realized by following scheme: Reversible Cycle hot blast lumber kiln, form by stove, warm-air pipe, kiln body, axial flow blower and air-introduced machine; Warm-air pipe is arranged on the wood drying kiln of kiln body or the side, and its air inlet is connected with stove, and air outlet is connected with the air-introduced machine that is positioned at kiln body top: the air inlet place of air-introduced machine is provided with air-valve: axial flow blower is contained on the hothouse or the side; Kiln is provided with the exhaust skylight on the top.Flue gas in the stove enters warm-air pipe under the effect of air-introduced machine, the circulating current that blows with axial flow blower carries out heat exchange; Flue gas is discharged by the air outlet of air-introduced machine: the circulating current that is heated carries out drying to timber, by the skylight hydrofuge of taking a breath; The skylight can be opened and can be closed, and is used to control the humidity in the kiln; Air-valve is used to control the kiln temperature, and along with air-valve leaves greatly, suction increases, and exhaust smoke level increases, and the fuel combustion amount is big, the kiln temperature rise; Otherwise the kiln temperature descends.

The utility model is compared small investment with the steam kiln; And compare with the hot blast kiln, having complete kiln temperature control and hydrofuge control function, wood drying quality is good, timber price height, thermal efficiency height, drying cost is low, safe and reliable.

Fig. 1 is the cutaway view of existing hot blast kiln;

Fig. 2 is the A-A cutaway view of Fig. 1;

Fig. 3 is the cutaway view of existing another kind of hot blast kiln;

Fig. 4 is a cutaway view of the present utility model;

Fig. 5 is that the B-B of Fig. 4 cuts open and sees figure;

Fig. 6 is the C-C cutaway view of Fig. 5;

Describe in detail below in conjunction with accompanying drawing;

To shown in Figure 6,7 is stove, outside the kiln body as Fig. 4; 1 is warm-air pipe, has 10, and its air inlet is connected with stove 7, is placed on the wood drying kiln 5, also can be contained in the side, and the air-introduced machine 2 on its air outlet and the kiln top is connected; Warm-air pipe is worked under negative pressure, be difficult for leaking, be difficult for catching fire producing in the kiln.Air inlet place at air-introduced machine 2 is provided with air-valve 8; 3 is axial flow blower; 4 is the skylight, can open and can close; 6 is sprayer unit, is loaded between axial flow blower and the warm-air pipe, is connected on the water pump 9, can give the kiln internal spraying when needing, in order to avoid timber ftractures because of inner and outer humidity have big difference.

Claims (2)

1, a kind of Reversible Cycle hot blast lumber kiln, by stove, warm-air pipe, kiln body and axial flow blower 3 are formed, warm-air pipe is arranged in the kiln body, axial flow blower 3 places on the wood drying kiln 5, and there is skylight 4 on kiln body top, it is characterized in that warm-air pipe installs concentratedly on hothouse 5, be connected with the air-introduced machine 2 that is installed on the kiln top, the air inlet place of air-introduced machine is provided with air-valve 8.

2, Reversible Cycle hot blast lumber kiln according to claim 1 is characterized in that being provided with the sprayer unit 6 that is connected to water pump 9 between warm-air pipe and axial flow blower 3.

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