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Condensing type drier

A dryer and condensing technology, which is applied in the direction of dryers, drying solid materials, heating to dry solid materials, etc., can solve the problems of material drying, flue gas condensation and heat release, etc., to save energy and improve system economy Effect

Active Publication Date: 2009-05-20
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the prior art, there is only equipment that uses the latent heat released by steam condensation to dry materials. The heat released by the condensation of the back pressure steam of the boiler is used to provide heat for the drying of materials, which cannot be directly used as a material drying method using the heat released by condensation of flue gas.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] see figure 1 , 2 , Is the condensing dryer of the present invention, including a shell 1 and a heat exchange tube 2. The heat exchange tube 2 is provided with a conveying mechanism 24, which is a paddle type conveyor; the heat exchange tube 2 is provided with a exhaust gas discharge port 23, and the shell 1 is provided with a condensate discharge port 13.

[0037] figure 2 for figure 1 The A-A cross-sectional view in FIG. 1 shows the pipe running form of the heat exchange tube 2 in the condensing dryer of the present invention. The shell 1 and the heat exchange tube 2 are both S-shaped, and the two are arranged orthogonally in the horizontal section of the S-shape. The heat exchange tubes 2 are arranged in parallel with four; the shell inlet 11 is located on the uppermost layer of the shell, and the shell outlet 12 It is located at the lowermost layer of the shell; the heat exchange tube feeding port 21 is located at one end of the uppermost pipe section, and the discha...

Embodiment 2

[0043] see image 3 , 4 , Is another condensing dryer of the present invention, including a shell 1 and a heat exchange tube 2. The heat exchange tube 2 is provided with a conveying mechanism 24, which is a shaftless screw conveyor; the heat exchange tube 2 is provided with a exhaust gas discharge port 23, and the shell 1 is provided with a condensate discharge port 13.

[0044] Figure 4 forimage 3 The B-B cross-sectional view in FIG. 2 shows the arrangement of the heat exchange tubes 2 in another condensing dryer of the present invention. The shell 1 has a long cylindrical shape, and two parallel heat exchange tubes 2 are arranged in the axial direction.

[0045] The flue gas discharged from the boiler is passed into the shell 1 through the shell inlet 11 and flows along the shell side. The wet sludge with a moisture content of 75% is sent to the shaftless screw conveyor in the heat exchange tube 2 through the feeding port 21, and the shaftless screw conveyor transports the sl...

Embodiment 3

[0050] see Figure 5 , 6 , Is the third condensing dryer of the present invention, including a shell 1 and a heat exchange tube 2. The heat exchange tube 2 is provided with a conveying mechanism 24, which is a screw conveyor; the heat exchange tube 2 is provided with an exhaust gas discharge port 23, and the shell 1 is provided with a condensate discharge port 13.

[0051] Figure 6 for Figure 5 The cross-sectional view of C-C in the diagram shows the arrangement of the heat exchange tubes 2 in the third condensing dryer of the present invention. The shell 1 is a long container, the inlet 11 is set at the top of the shell 1, and the outlet 12 is set at the bottom of the shell 1. In the shell 1, there are three parallel heat exchange tubes 2, which are divided into upper and lower parts. Layer arrangement, the bottom heat exchange tube 2 is provided with a feeding port 21, and the topmost heat exchange tube 2 is provided with a discharge port 22; both ends of each heat exchange t...

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Abstract

The invention discloses a condensation type drier and relates to material drying technology. The condensation type drier comprises a shell body and heat exchange tubes; one end of the shell body is provided with a shell body inlet; the other end of the shell body is provided with an outlet; the lower part of the shell body is provided with a condensate discharge port; one end of each heat exchange tube is provided with a feed port; the other end of each heat exchange tube is provided with a discharge port; the upper sides of the heat exchange tubes are provided with an exhaust gas discharge port which is communicated with atmosphere; the insides of the heat exchange tubes are axially provided with a transportation mechanism which is externally connected with power; a plurality of the heat exchange tubes are fixedly positioned in an inner chamber of the shell body; and the circumferences of the heat exchange tubes are in sealed and fixed connection with the sidewall of the shell body. The drier has the advantages that the drier has a simple structure and convenient operation, can recycle the collected waste heat and save cost.

Description

Technical field [0001] The invention relates to the technical field of material drying, and is a material drying device, especially a condensing dryer. Background technique [0002] Thermal drying is a commonly used drying method. With the tight energy supply and rising energy prices, its energy consumption has become one of the keys to technological development. [0003] In the prior art, waste heat is often used to provide heat for the drying process. For example, the heat exchange medium is used to absorb heat from the boiler flue gas and release the heat in the dryer to heat up and dry the material. However, the existing boiler flue gas waste heat utilization is limited to the use of the sensible heat of the flue gas. The flue gas is used as a heat source, and the temperature after cooling is still higher than the water vapor dew point. The water vapor will not condense, but will be discharged with the flue gas. Water vapor will take away a lot of latent heat of vaporization....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B3/22F26B23/10F26B17/20
CPCY02P70/10
Inventor 吕清刚高鸣朱建国李诗媛李云玉那永洁包绍麟
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI