JPH0626880Y2 - Pump composite type intermediate heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a pump-composite type intermediate heat exchanger applied to a power plant using a loop type fast breeder reactor.

(Prior Art) A conventional pump-composite type intermediate heat exchanger will be described with reference to FIG. 5. (01) is a deck, (02) is a primary coolant inlet pipe, (03) is a primary coolant outlet pipe, (04) is the secondary coolant inlet of the intermediate heat exchanger (secondary coolant inlet nozzle), (05) is the secondary coolant outlet of the intermediate heat exchanger (secondary coolant outlet nozzle), (06 ) Is a large number of heat transfer tubes of the intermediate heat exchanger, (07) is a baffle plate of the intermediate heat exchanger, (08) is a primary coolant circulation pump, (08a) is a primary coolant circulation pump (08). Inlet, (08b) is outlet of the same primary coolant circulation pump (08), (011) is pump casing of the primary coolant circulation pump (08), (015) is outer body of intermediate heat exchanger , (016) is the inner body of the intermediate heat exchanger, (017) is the pump combined intermediate heat exchanger, (A) is the upper plenum, (B)
Is a lower plenum, and the primary coolant inlet and the primary coolant outlet of the intermediate heat exchanger communicate with each other via the heat transfer tubes (06) and the secondary coolant inlet (04) and 2 Next coolant outlet (0
5) communicates with the inside of the inner body (016) around each heat transfer tube (06), and the suction port (08a) of the primary coolant circulation pump (08) is the primary coolant of the intermediate heat exchanger. The discharge port (08b) of the same primary coolant circulation pump (08) communicates with the outlet, and the primary coolant outlet pipe (03)
And the high temperature primary coolant is connected to the primary coolant inlet pipe
(02) → Upper plenum (A) → Each heat transfer tube (0
6) Inside → Lower plenum (B) → Primary coolant circulation pump (08)
Suction port (08a) → discharge port (08) of the primary coolant circulation pump (08)
b) → While being guided to the primary coolant outlet pipe (03), the secondary coolant is the secondary coolant inlet part (secondary coolant inlet nozzle) (04) of the intermediate heat exchanger → each heat transfer pipe (06 ) Inside the inner body (016) (a zigzag-like passage formed between the baffle plates (07)) → Guide to the secondary coolant outlet of the intermediate heat exchanger (secondary coolant outlet nozzle) (05) The inner body (0) around each heat transfer tube (06)
16) The secondary coolant flowing inside is heated by the high temperature primary coolant flowing through each heat transfer tube (06) (the high temperature primary coolant is cooled by the secondary coolant). There is.

(Problems to be Solved by the Invention) In the conventional pump composite type intermediate heat exchanger shown in FIG. 5, the tip of the primary coolant inlet pipe (02) is located at the upper plenum (A).
The heat transfer tubes (0
Since the inflow to 6) is non-uniform, that is, the inflow to the heat transfer pipe (06) directly below the primary coolant inlet pipe (02) is large and the transfer from the primary coolant inlet pipe (02) is large. Since the amount of inflow to the heat pipes (06) is small, the heat transfer performance of the heat transfer pipes (06) as a whole is degraded, and a difference in thermal expansion occurs between the heat transfer pipes (06).
Buckling occurs.

In this respect, a ring-header-shaped primary coolant inlet is provided on the tip side of the primary coolant inlet pipe (02), and a large number of primary coolant inlet holes are provided at the primary coolant inlet, This can be solved by equalizing the inflow amount to each heat transfer pipe (06), but the ring-header-shaped primary coolant inlet part is connected to the primary coolant inlet pipe (0
When fixed to the tip of 2) by welding, the primary coolant inlet pipe
The load applied to (02) increases. Also ring-shaped 1
When the inlet of the secondary coolant is fixed to the inner body (016) of the intermediate heat exchanger via the ring header support to reduce the load applied to the inlet pipe (02) of the primary coolant, The thermal expansion of the inlet pipe (02) is restricted, and the primary coolant inlet pipe of the same
The stress generated in (02) becomes large.

The primary coolant outlet pipe (03) is connected to the primary coolant circulation pump (0
It is directly fixed to the pump casing (011) of 8) by welding or the like, and the thermal expansion of the primary coolant outlet pipe (03) is also restricted, so that the stress generated in the primary coolant outlet pipe (03) is There was a problem of getting bigger.

The present invention is proposed in view of the above problems, and the purpose thereof is to improve heat transfer performance and prevent buckling of the heat transfer tube. Another object is to provide a pump-composite intermediate heat exchanger that can reduce the stress generated in the primary coolant inlet pipe and the primary coolant outlet pipe.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a secondary coolant through which a primary coolant inlet part and a primary coolant outlet part communicate with each other via a heat transfer tube. An intermediate heat exchanger in which an inlet part and a secondary coolant outlet part are communicated with each other through a body around the heat transfer tube,
It has a secondary coolant inlet pipe, a primary coolant circulation pump, and a primary coolant outlet pipe, and the suction port of the primary coolant circulation pump is at the primary coolant outlet of the intermediate heat exchanger. Communication, same 1
In a pump-composite type intermediate heat exchanger in which a discharge port of a secondary coolant circulation pump communicates with the primary coolant outlet pipe, the primary coolant inlet part of the intermediate heat exchanger is formed in a ring-header shape. An inlet-side insertion pipe is provided at the coolant inlet, the primary coolant inlet pipe is slidably inserted into the inlet-side insertion pipe, and the outlet-side insertion is made at the discharge port of the primary coolant circulation pump. A pipe is provided, and the secondary coolant outlet pipe is slidably fitted in the outlet side insertion pipe.

(Operation) The pump-composite type intermediate heat exchanger of the present invention is configured as described above, in which the high temperature primary coolant passes from the primary coolant inlet pipe to the ring header-shaped primary coolant inlet port to form the intermediate heat. Since it is introduced into each heat transfer tube of the exchanger, the amount of primary coolant flowing into each heat transfer tube is made uniform throughout the heat transfer tube, improving heat transfer performance and causing buckling of the heat transfer tube. To be prevented. In addition, an inlet side insertion pipe is provided at the ring-hedder-shaped primary coolant inlet port, and the primary coolant inlet pipe is slidably inserted into the inlet side insertion pipe, so that the primary coolant circulation pump An outlet side insertion pipe is provided at the discharge port, and a secondary coolant outlet pipe is slidably inserted into the outlet side insertion pipe. The primary coolant inlet pipe and the secondary coolant outlet pipe are The thermal elongation is allowed, and the stress generated in the primary coolant inlet pipe and the primary coolant outlet pipe is reduced.

(Embodiment) Next, the pump composite type intermediate heat exchanger of the present invention will be explained with reference to an embodiment shown in FIGS. 1 and 2. (1) in FIGS. 1 and 2 is a defect and (2) is a primary cooling. Material inlet pipe, (3) primary coolant outlet pipe, (4) secondary coolant inlet part of intermediate heat exchanger (secondary coolant inlet nozzle), (5) secondary heat exchanger of secondary Coolant outlet (secondary coolant outlet nozzle), (6) is a large number of heat transfer tubes of the intermediate heat exchanger, (7) is a baffle plate of the intermediate heat exchanger, and (8) is 1
Secondary coolant circulation pump, (8a) is the same primary coolant circulation pump
(8) inlet, (8b) outlet of the same primary coolant circulation pump (8), (9) ring-header-shaped primary communicating with the tip of the primary coolant inlet pipe (2) The coolant inlet port, (10) is a plurality of primary coolant inlet ports (11) provided in the ring-header-shaped primary coolant inlet port (9), and (11) is the primary coolant circulation pump (8). The pump casing, (12) is an inlet side insertion pipe provided at the ring header-shaped primary coolant inlet part (9), and the inlet side insertion pipe is the same.
The tip of the primary coolant inlet pipe (2) is slidably fitted into (12). Further, (13) is an outlet side insertion pipe provided at the discharge port (8b) of the primary coolant circulation pump (8), and the primary coolant outlet pipe (3 ) Is slidably inserted. Further, (15) is the outer body of the intermediate heat exchanger, (16) is the inner body of the intermediate heat exchanger, (17) is the pump-composite type intermediate heat exchanger, (A) is the upper plenum, and (B) is the lower part. Plenum part (14) is the primary coolant inlet part (ring header)
A ring header support for attaching (9) to the inner body (16) of the intermediate heat exchanger. Further, (18) in FIG. 3 is a seal member interposed between the tip of the primary coolant inlet pipe (2) and the inlet side insertion pipe (12), and this portion is shown in FIG. As shown in, there is no problem even without the seal member.

Next, the operation of the pump composite type intermediate heat exchanger shown in FIGS. 1 and 2 will be specifically described. The high temperature primary coolant is the primary coolant inlet pipe (2) → ring-hedder primary coolant inlet part (9) →
Each primary coolant inflow hole (10) → each heat transfer tube (6) of the intermediate heat exchanger
Inner → lower plenum (B) → inlet (8a) of primary coolant circulation pump (8) → outlet (8b) of primary coolant circulation pump (8) → 1
While being guided to the secondary coolant outlet pipe (3), the secondary coolant is the secondary coolant inlet part of the intermediate heat exchanger (secondary coolant inlet nozzle)
(4) → Inside the inner body (16) around each heat transfer tube (6) (zigzag-like passage formed between each baffle plate (7)) → Secondary coolant outlet of the intermediate heat exchanger (secondary cooling) Material outlet nozzle) (5) and flows inside the inner body (16) around each heat transfer tube (6) 2
The secondary coolant is heated by the high temperature primary coolant flowing through each heat transfer tube (6) (the high temperature primary coolant is cooled by the secondary coolant).

(Effect of the Invention) As described above, the pump-composite type intermediate heat exchanger of the present invention supplies the high-temperature primary coolant from the primary coolant inlet pipe to the ring-headed primary coolant inlet port of the intermediate heat exchanger. Since the heat is introduced into each heat transfer tube, the amount of the primary coolant flowing into each heat transfer tube can be made uniform throughout the heat transfer tube, the heat transfer performance can be improved, and buckling of the heat transfer tube can be prevented.

In addition, an inlet side insertion pipe is provided at the ring-hedder-shaped primary coolant inlet part, and the primary coolant inlet pipe is slidably inserted into the inlet side insertion pipe, and is connected to the outlet of the primary coolant circulation pump. The outlet side insertion pipe is provided, and the secondary coolant outlet pipe is slidably inserted into the outlet side insertion pipe, and the thermal expansion of the primary coolant inlet pipe and the secondary coolant outlet pipe can be allowed. As a result, the stress generated in the primary coolant inlet pipe and the primary coolant outlet pipe can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of a pump-composite type intermediate heat exchanger according to the present invention, and FIG. 2 is a view II-II in FIG.
Cross-sectional plan view along the line, Figs. 3 and 4 are longitudinal side views showing the joint between the primary coolant inlet pipe and the inlet side insertion pipe, and Fig. 5 shows a conventional pump-composite intermediate heat exchanger. It is a vertical side view. (2) …… Primary coolant inlet pipe, (3) …… Primary coolant outlet pipe,
(4) …… Secondary coolant inlet of intermediate heat exchanger, (5) …… Secondary coolant outlet of intermediate heat exchanger, (6) …… Each heat transfer tube of intermediate heat exchanger, (8 ) …… Primary coolant circulation pump, (8a) …… 1
Inlet of the secondary coolant circulation pump (8), (8b) ... Outlet of the primary coolant circulation pump (8), (9) ...... Ring-hedder primary coolant inlet, (10) ...... Ring-headed primary coolant inlet (9) primary coolant inlet hole, (12) …… Inlet side insertion pipe, (1
3) …… Outlet side insertion pipe, (15) …… Outer body of intermediate heat exchanger, (16) …… Inner body of intermediate heat exchanger, (17) …… Pump compound type intermediate heat exchanger.

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A primary coolant inlet part and a primary coolant outlet part communicate with each other through a heat transfer tube, and a secondary coolant inlet part and a secondary coolant outlet part are provided around a heat transfer tube. It has an intermediate heat exchanger communicating through the inside, a primary coolant inlet pipe, a primary coolant circulation pump, and a primary coolant outlet pipe, and the suction port of the primary coolant circulation pump is In the pump-composite intermediate heat exchanger, which communicates with the primary coolant outlet of the intermediate heat exchanger, and the discharge port of the primary coolant circulation pump communicates with the primary coolant outlet pipe. The inlet of the primary coolant of the container is formed into a ring-head shape, the inlet side insertion pipe is provided at the inlet of the primary coolant, and the primary coolant inlet pipe can be slid on the inlet side insertion pipe. Insert the outlet side insertion pipe at the outlet of the primary coolant circulation pump, and discharge the secondary coolant at the outlet side insertion pipe. Pump composite intermediate heat exchanger, characterized in that fitted the tube slidably.