JP5959606B2 - Rotating regenerative heat exchanger - Google Patents

Description

  The present invention relates to a rotary regenerative heat exchanger, and more particularly to a rotary regenerative heat exchanger having a basket in which heating elements are inserted in a stacked state.

  Generally, in the rotary regenerative heat exchanger, as shown in FIGS. 4 and 5, a rotor main body R is rotatably mounted in a housing H, and the rotor main body R is radiated by a radial diaphragm D (for example, 12 or 12). 24) The basket B is inserted into the partitioned sector, and the heating element E as a heat storage is loaded in the basket B in a stacked state, and a high-temperature fluid (exhaust gas etc.) and a low-temperature fluid (combustion) are loaded into the heat transfer element E. For example, the heat of the high-temperature fluid is transferred to the low-temperature fluid by alternately contacting the air.

By the way, in a rotary regenerative heat exchanger that uses an untreated gas containing components (SO ₃ , H ₂ O) and an exhaust gas containing treated gas (mist from DeSOx, mist component) as a high-temperature fluid, a long-term (2- The dust accumulated and solidified or rusted in the gap between the basket B where the heating element E was inserted and the diaphragm D during the operation for 3 years or more. When the basket B is pulled out of the rotor main body R for inspection or replacement, the frictional force between the dust and rust and the basket is often increased, which is an obstacle. In particular, when pulling out for inspection, breakage of the basket B has to be avoided, and eventually, it has been abandoned that sufficient inspection cannot be performed.

Usually, the basket B is manufactured to be several mm smaller than the insertion portion so that it can be smoothly inserted into and removed from the rotor body R.
However, this is a dimension that takes into account the manufacturing tolerance of the rotor body R, and if a basket having the same dimensions as the insertion point is manufactured in order to prevent dust from entering, there is a drawback that it cannot be inserted into the actual rotor body R. .

Next, if the size of the basket B is reduced to about several tens of millimeters from the insertion location, even if there is no problem in the insertion of the basket B, the passage cross-sectional area of the heating element E is reduced and the heat exchange performance is affected. There was a drawback.
Therefore, as shown in FIG. 6, a method is conceivable in which only the size of the basket B at the management location where the rotor main body R divided into a plurality of parts is inspected is made smaller than the insertion location by about a dozen mm.
However, the dust that accumulates around the basket B is not simply stacked, but also corrodes the basket material and rotor body material, and rust grows on the surface, eliminating the gap, and the dust is pressed into the gap. As a result, it was found that even if a gap larger than the conventional gap was created in advance, the gap disappeared due to dust after a long period of operation. Further, as shown in FIG. 4, in the case of the vertical regenerative heat exchanger, it is expected that the basket B is not normally inserted and is inserted obliquely, thereby causing fluid bypass. (See Figure 7)

  An object of the present invention is to provide a rotary regenerative heat exchanger that eliminates the disadvantages of the prior art and can be smoothly inserted into and removed from the rotor body even when operated for a long period of time.

  The rotary regenerative heat exchanger of the present invention is equipped with a rotor body rotatably in a housing, and a plurality of baskets are inserted into a sector in which the rotor body is partitioned by a radial diaphragm, and heat is stored in the basket. A heating element as a body is loaded in a stacked state, and a high-temperature fluid such as exhaust gas and a low-temperature fluid such as combustion air are alternately brought into contact with the heat transfer element so that the heat of the high-temperature fluid is transferred to the low-temperature fluid. The rotary regenerative heat exchanger is characterized in that several spacer bars are intermittently attached to the side plate of the basket facing the diaphragm at appropriate intervals. Further, the axis of the plurality of spacer bars is respectively directed to the insertion / removal direction of the basket. Furthermore, the plurality of spacer bars are arranged in a line at a middle height position of the basket. Still further, the spacer bar is configured as one long bar.

The rotary regenerative heat exchanger of the present invention has the following effects.
1) The amount of high temperature fluid containing dust entering between the side plate of the basket and the diaphragm is reduced, and as a result, the amount of deposition is reduced.
2) Since the contact friction between the spacer bar and the diaphragm is small, it is possible to smoothly insert and remove the basket of the heat exchange device, which has been difficult to insert and remove.

It is the top view (A) of the 24 divided | segmented sector of the rotor main body of the rotary regeneration type heat exchanger of this invention, and its side view (B). It is the perspective view (A) of one Example of the basket with which the rotary regenerative heat exchanger of FIG. 1 is loaded, and the end view seen from the arrow view Y. It is a perspective view of another Example of the basket with which the rotation regenerative heat exchanger of this invention is loaded. It is a partially cutaway perspective view of a conventional rotary regenerative heat exchanger. It is a top view of the rotor main body of the rotation regeneration type heat exchanger of FIG. It is explanatory drawing of a prior art. It is explanatory drawing of the problem of a prior art.

  Hereinafter, an embodiment of the regenerative heat exchanger of the present invention will be described with reference to the drawings.

  In FIG. 1, reference numeral 1 denotes a basket, and several (10 in the present embodiment) are loaded between the diaphragms 2. These baskets 1 are inserted and removed in the direction of arrow X during inspection and replacement.

  As apparent from FIG. 2, a large number of heating elements 3 are housed in the basket 1 in a stacked state. Reference numeral 1a denotes a side plate that faces the diaphragm 2 described above.

  Several (three in this embodiment) metal spacer bars 4 are intermittently attached to the side plate 1a of the basket 1 facing the diaphragm 2 with appropriate intervals. The axis lines of these spacer bars 4 are each directed in the insertion / removal direction (arrow X) of the basket 1. These spacer bars 4 are preferably arranged in a row at the intermediate height position of the basket 1 because of low frictional resistance, but the present invention is not limited to this, and the spacer bars 4 may be arranged with some variation in the vertical direction. Good. Each spacer bar 4 has, for example, a thickness of 16 mm, a width of 38 mm, and a length of 100 mm, but is not limited thereto.

  As shown in FIG. 2 (B), the basket 1 shown in FIG. 1 (A) that fits in one circumferential direction has a spacer bar 4 attached to the side plates 1a on both sides, and two or more. When entering, the spacer bar 4 is attached to the basket 1. It should be noted that the dimensions of the basket 1 itself are appropriate so that when the spacer bar 4 is attached, the dimensions of the basket 1 itself are appropriate because the heat exchange performance is affected if the distance from the diaphragm is too large.

  In the present embodiment, since it is configured as described above, the amount of high temperature fluid including dust entering between the side plate 1a of the basket 1 and the diaphragm 2 is reduced, and as a result, only the amount of deposition is reduced. In addition, since the contact friction between the spacer bar 4 and the diaphragm 2 is small, it has become possible to smoothly insert and remove the basket of the heat exchange device that has been difficult to remove and insert.

  FIG. 3 shows another embodiment of the present invention. The plurality of spacer bars 4 are formed as one long bar and are oriented in the insertion / removal direction at the intermediate height position of the side plate 1a of the basket 1. And attach. In this embodiment, the amount of accumulated dust is further reduced.

1 Basket 1a Side plate 2 Diaphragm 3 Heating element 4 Spacer bar H Housing R Rotor body

Claims (3)

A rotor main body is rotatably mounted in a housing, a plurality of baskets are inserted into a sector in which the rotor main body is partitioned by a radial diaphragm, and heating elements as heat storage bodies are loaded in a stacked state in the basket. and, wherein the heating element by contacting a low temperature fluid such as high temperature fluid and the combustion air, such as exhaust gas alternately rotating regenerative heat exchanger that is configured to transfer heat of the hot fluid to the cold fluid In the vessel
A rotary regenerative heat exchanger characterized in that a spacer bar configured as a single elongated bar having an elliptical cross section is attached to a side plate of a basket facing the diaphragm.   2. The rotary regenerative heat exchanger according to claim 1, wherein an axis of the spacer bar is directed in a direction of inserting and removing the basket.   The rotary regenerative heat exchanger according to claim 1 or 2, wherein the spacer bar is attached to an intermediate height position of the basket.