CN2466204Y

CN2466204Y - Oil-heated drying cylinder for papermaking machine

Info

Publication number: CN2466204Y
Application number: CN 01213068
Authority: CN
Inventors: 安西昌
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-03-02
Filing date: 2001-03-02
Publication date: 2001-12-19
Anticipated expiration: 2011-03-02

Abstract

The utility model relates to an oil-heated drying cylinder of a papermaking machine, which is composed of a cylindrical cylinder body, a cylinder cover and a shaft head. In a cylinder body cavity, a ring of a column-shaped interlayer is encircled around the inner wall of the cylinder body, and the interlayer is communicated with an oil supply pipeline of an organic heat carrier or heat transfer oil through the hollow part of the shaft head. The heat efficiency is improved by adopting the heat transfer oil as a heat exchange medium. As the heat transfer oil runs under the ordinary pressure, the technical requirement of the drying cylinder is reduced, and thereby, the weight of the drying cylinder is lightened.

Description

Papermaking machine oil hot type drying cylinder

The utility model belongs to pulp technology for making paper, relates in particular to the improvement to paper machine dryer.

During paper, when paper web forms and after the press section dehydration, still has the moisture content about 60% to need slough in the oven dry portion of paper machine, so that paper web reaches about 94% required mass dryness fraction of finished product.The paper web drying is the maximum operation of power consumption in the papermaking, accounts for 60% of steam consumption, and oven dry portion equipment is paper machine the heaviest the longest part, weight accounts for 60% of paper machine, cost accounts for 50% of paper machine, and the nucleus equipment of this part is baking paper cylinder and baking blanket cylinder, the general designation drying cylinder.Paper industry is to the drying of paper web, and what take is that steam is fed drying cylinder always, to the drying cylinder heating, utilizes the dryer surface heat paper web moisture content to be carried out the drying means of heating evaporation diffusion.Domestic drying cylinder forms through spun casting by cast iron, and it is made of cylinder body, cylinder cap, spindle nose etc., is cavity in the cylinder body, and the cylinder cap two ends are spindle nose, and steam enters inner chamber by the hollow bulb of spindle nose, wherein also is provided with condensate water extraction device.In order to reach higher bake out temperature, the steam pressure that feeds in the drying cylinder is 0.3-0.5MPa, in order to bear pressure, the wall thickness of general cylinder body will reach more than the 20mm, and the thickness of cylinder cap is bigger, for large diameter drying cylinder, its wall thickness can reach 50-70mm, and single cylinder weight does not wait from several tons to tens tons.

There is following shortcoming in drying cylinder with Steam Heating: at first be the operating cost height, and a paper machine of producing ten thousand tons per year, the steam expense in its oven dry portion every year just reaches 2,000,000 yuan.Main cause is that the thermal efficiency of steam boiler own is not high, and the steam waste heat rate of recovery is low, after the steam in the cylinder body becomes condensed water, has strengthened heat transmission resistance, has increased energy consumption.In addition, because the steam pressure requirement increases the wall thickness of drying cylinder, weight strengthens, and electric load increases during running.Secondly, the employing of steam dryer has strengthened the equipment investment that matches with it, as the input of equipment such as steam boiler, water treatment, dedusting, plumbing.

The purpose of this utility model is to provide a kind of papermaking machine oil hot type drying cylinder, to reduce heat cost and equipment investment.

For achieving the above object, the employing technical scheme is as follows: papermaking machine oil hot type drying cylinder, contain garden cylindricality cylinder body, there is cylinder cap at the two ends of garden cylindricality cylinder body, the outside, two cylinder cap axle center is a spindle nose, and oil feed line communicates with inner chamber of cylinder block by the hollow bulb of spindle nose, especially in cylinder chamber, the inwall that centers on cylinder body has the interlayer of a central column, and this interlayer links by the hollow bulb and the oil feed line of spindle nose.

In addition, in two cylinder cap inboards, outwards disperse uniform some communicating pipes by the axle center, the end of dispersing of two groups of communicating pipes is communicated with interlayer, and axis client is communicated with the hollow bulb of two spindle noses respectively.Cylinder cap is arranged to spoke-like, fixedlys connected with cylinder body in the cylinder cap outer.

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

Fig. 1 is the sectional structure schematic diagram of papermaking machine oil hot type drying cylinder embodiment one.

Fig. 2 is the sectional structure schematic diagram of embodiment two.

Fig. 3 is the cross-sectional schematic of embodiment three.

Fig. 4 is the sectional structure schematic diagram of embodiment four.

Fig. 5 be among Fig. 4 along A-A to the half section structural representation.

Fig. 1 is first kind of embodiment of this drying cylinder.Papermaking machine oil hot type drying cylinder is by garden cylindricality cylinder body 1, the

cylinder cap

2,3 at cylindricality cylinder body two ends, garden, and the

spindle nose

4,5 in the outside, two cylinder cap axle center constitutes.Maintenance hand-hole 6 is arranged on the cylinder cap 3,

spindle nose

4,5 is hollow form, in the cavity of cylinder body 1, the interlayer 7 of a central column is arranged around the inwall of cylinder body 1, inner chamber of cylinder block is divided into central column interlayer 7 and cavity 8 two parts, and this central column interlayer 7 links by the hollow bulb and the outside oil feed line of spindle nose.Conduction oil only enters interlayer 7, and does not enter cavity 8, and direction shown in the arrow is the flow direction of conduction oil among the figure, and two spindle noses are hollow among this embodiment, so conduction oil can advance by an end, is brought out by another.

Fig. 2 is second kind of embodiment of this oily hot type drying cylinder.Wherein spindle nose 5 seals, and the structure of interlayer 7 is identical with Fig. 1, and difference is that conduction oil is passed in and out by same end, so set up a flowline 9, flowline 9 leads to outside the drying cylinder via the hollow bulb of spindle nose 4.

Fig. 3 is the third embodiment of this drying cylinder.In two cylinder cap inboards, outwards disperse uniform some communicating pipes by the axle center, the inboard of cylinder cap 4 is oil-feed communicating pipe 10, and the inboard of cylinder cap 5 is that the end of dispersing of fuel-displaced 11, two groups of communicating pipes of communicating pipe communicates with interlayer 7, and axis client connects the turnover oil pipe line respectively.This embodiment by substituting two groups of communicating pipes, has reduced the injection flow in inessential space in the drying cylinder with two cylinder caps and formed two cavitys of interlayer both ends of the surface, helps improving whole heating efficiency.

Fig. 4 embodiment is further perfect to Fig. 3 embodiment, it is except that having interlayer 7 and two groups of communicating pipes 10,11, also cylinder cap has been done further improvement, as shown in Figure 5, two

ends cylinder cap

2,3 is modified into spoke-like by original totally-enclosed shape, has alleviated drying cylinder weight, spoke is provided with open-work 12, therefore easy access need not be provided with the maintenance hand-hole more specially on cylinder cap.Every group of communicating pipe is 3 shown in Fig. 5, in practice, can several be set according to caliber size and flow velocity coupling.

Disclosed technical scheme also can be used for the transformation to the existing drying cylinder of domestic paper industry among above-mentioned four embodiment, and embodiment 1,3 is applicable to the transformation of diameter greater than 2 meters drying cylinder, and

embodiment

2,3 is applicable to the transformation of diameter less than 2 meters drying cylinder.

The operation principle of this drying cylinder is with the organic heat carrier after the heating or claims conduction oil, adopts the method for forced circulation, feeds in interlayer, by interlayer the heat that conduction oil carries is delivered to dryer surface again, and then realizes the drying to paper web.

The utility model compared with prior art has the following advantages:

1, oily heated drying cylinder adopts conduction oil to make heat exchange medium, because conduction oil is the normal pressure liquid phase Operation, and unlike passing into steam, conduction oil is full of whole drying cylinder inside, just pass into The drying cylinder interlayer, like this, less conduction oil just can reach the temperature requirements of paper web drying. Existing Have drying cylinder to adopt the steam boiler heat supply, the thermal efficiency is generally below 30%, and the employing heat-conducting oil furnace Heat supply, the thermal efficiency can reach more than 70%, and its thermal efficiency is 2-3 times of steam boiler, has saved Fuel cost. In addition, the conduction oil circulation time almost all returns waste heat, has avoided the steam confession The condensed water that forms in drying cylinder when hot is to the consumption of heat energy, and then reduced operating cost.

2, owing to sandwich establishment in the drying cylinder, therein normal pressure operation of conduction oil, so the skill of drying cylinder Art requires significantly to reduce, thereby has alleviated the weight of drying cylinder, has reduced the manufacturing cost of drying cylinder, Electric load when also having alleviated simultaneously operation.

3, this heat-supplying mode makes original auxiliary facility relevant with steam heating, such as water treatment The input of equipment, cleaner, water supply and drainage equipment etc. is significantly cut down, and has dwindled the throwing of founding the factory Money has been saved fund.

Claims

1, papermaking machine oil hot type drying cylinder, contain garden cylindricality cylinder body, there is cylinder cap at the two ends of garden cylindricality cylinder body, the outside, two cylinder cap axle center is a spindle nose, oil feed line communicates with inner chamber of cylinder block by the hollow bulb of spindle nose, it is characterized in that in cylinder chamber the inwall that centers on cylinder body has the interlayer of a central column, this interlayer links by the hollow bulb and the oil feed line of spindle nose.

2, papermaking machine oil hot type drying cylinder as claimed in claim 1 is characterized in that outwards dispersing uniform some communicating pipes in two cylinder cap inboards by the axle center, and the end of dispersing of two groups of communicating pipes is communicated with interlayer, and axis client is communicated with the hollow bulb of two spindle noses respectively.

3, papermaking machine oil hot type drying cylinder as claimed in claim 2 is characterized in that two cylinder caps are spoke-like, fixedlys connected with cylinder body in the cylinder cap outer.