JPH10246582A - Double pipe heat-exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a double pipe liquid, liquid one-pass type heat-exchanger for recovering waste heat which can be applied to buses where the merit of easy cleaning can be utilized. SOLUTION: A single unit comprises four headers 1, 2 and a double pipe 3, 4 heat-exchanging section. Inner wall of the inner pipe is cleaned by removing a cover 6 at one end of the header 1. The inner pipe can be drawn out from the cover 6 by loosening a screw union 5 and both inner and outer pipes can be cleaned. Each header 1, 2 is fixed with required number of double pipes 3, 4 depending on the flow rate and since the overall length of the heating tube is determined as one pass type, the units can be coupled in several rows.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0101]

BACKGROUND OF THE INVENTION As an exhaust heat recovery apparatus, for example, it can be used for heat exchange between two liquids such as hot springs, baths, pools, aquaculture farms, power plants, and various factory drains.

[0092]

2. Description of the Related Art Existing double-pipe heat exchangers are coiled,
The mainstream is a bent product such as a hairpin type or a trombone type. There is also a double pipe straight pipe type, but it is difficult to clean both inner and outer pipes with both ends fixed by using a short pipe and a single item.

[0093]

The heat exchange efficiency is good. Easy cleaning of dirt and other contaminants (removable inner tube), absolutely no mixing of the two liquids, and possible upsizing.

[0093]

The layout of this device is shown in the accompanying drawing (FIG. 1). Double tube with good heat exchange efficiency (3)
(4) was adopted. A lid (6) is attached to one end (or both ends) in order to allow drainage to pass through the inner tube side and remove dirt and deposits. In this part, the entire side surface may be detachable, or a franc type. To enable the inner surface of the outer tube (3) to be cleaned, a neon union (5) was adopted so that the inner tube (4) could be removed. To avoid mixing two components,
Independent headers (1) and (2) were set up, and the four headers were connected and fixed by angles, round bars, or the like. Add more double tubes to this header. Further, by increasing the number of units, the size can be easily increased.

[0056]

[Application] This device was developed for heat exchangers of "liquid" and "liquid", but can also be applied to heat exchange of "liquid" and "gas".

[0086]

[Example] The embodiment adopted for exhaust heat recovery in a fish farm is as follows: Primary side, seawater flow 500L / min, temperature 18 ° C → 15 ° C Secondary side, seawater flow 500L / min, temperature 12 ° C → 15 ℃ Retrograde 1 pass type, heat transfer area 18M ² Exchange heat 90,0
It is a specification of 00 Kcal / hour. The members were a PVC pipe as an outer pipe, a titanium pipe as an inner pipe, a header and other drainage parts made of PVC, and a joint part was welded or bonded with an adhesive. The unit is 4
In the series, the overall schematic dimensions are 950 width x 1400 height x
The length is 2900. -Margins below-

[Brief description of the drawings]

FIG. 1 is a configuration diagram

[Explanation of symbols]

 (1) Primary header (2) Secondary header (3) Outer pipe (4) Inner pipe (5) Neon union (6) Lid (7) Connecting pipe (8) Drain drain (9) Base

Claims (3)

[Claims] 1. A double-tube type using an outer tube and an inner tube is used as a straight tube, and the inner tube inner surface has a cover at one end (or an entire sheet at one end of a header) to allow a cleaning rod to be inserted. 2. Both ends of the inner tube are fixed with a screw union.
The inner tube can be removed from the lid by loosening the screw cap. 3. The overall configuration is such that one unit is composed of four headers, the headers of the primary liquid and the secondary liquid are completely separated and independent, and there is no mixing of the two liquids. Each header is equipped with several double pipes corresponding to the flow rate with round pillars, square pillars, etc. In order to obtain the total length of the heat transfer pipes as a one-pass type, these units are combined and connected in several rows.