JPS59136185A - Condenser for water desalting device - Google Patents

Abstract

PURPOSE:To improve the heat recovery rate in a condenser by dividing cooling water to be supplied to a condenser to two systems, making the film coefft. on the side which supplies the water to a multiple-effect evaporator larger than that on the side which discharges the water therefrom and recovering the greater part of the heat of the distilled water, etc. from the final stage into the cooling water. CONSTITUTION:The cylindrical part 11 in which the heat source such as the distilled water supplied from an effect 1n in the final stage through a piping 9 and the steam supplied through a piping 6 is passed is bisected to a heat recovering part 11a and a heat discharging part 11b by a partition plate 12 in a condenser 10 connected to the effect 1n. The outlet 14 of a cooling pipe 13a on the part 11a side is connected to the effect 1n to discharge the sea water from the outlet 15 of the cooling pipe 13b on the part 11b side. The heat source passes through the lower passage 12a of the plate 12 from the part 11a and arrives at the part 11b where it is made into condensate. The condensate is taken out through an outlet 17. The sea water from the cooling pipe 13a flows through a decarbonizing column 18 and a deaerating column 19 and flows through the effect 1n to an effect 11 where the water is boiled by heating steam 5 and is subjected to a steam-liquid sepn. in a steam separator 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a condenser incorporated into a seawater desalination apparatus.

The desalination equipment consists of a multi-effect canister, the final stage of which is equipped with a condenser for condensing distilled water and natural air. Seawater is used as the cooling water for this condenser, and a portion of the cooling water that has undergone heat exchange with distilled water or the like is supplied to the multi-effect tank as a desalination treatment liquid. However, since the remaining cooling water that has passed through the condenser is drained, there is a problem that heat recovery cannot be performed effectively.The purpose of the present invention is to increase the heat recovery rate in the condenser.

This invention divides the cooling water supplied to the condenser into two systems, makes the film coefficient of the one supplied to the multi-effect tank larger than that of the one drained, and multiplexes most of the heat from the distilled water etc. from the final stage. The cooling water supplied to the utility can is recovered.

Hereinafter, the present invention will be explained based on the embodiments shown in the accompanying drawings.

Figure 1-1 shows a schematic overall diagram of the desalination equipment, and although the figure shows only three stages of effect cans 1, about 10 stages are connected in series. ! has been done. The utility can 1 consists of a preheating pipe 2 through which make-up water passes, a boiling heat transfer tube 3 that heats and boils the make-up water, and a gas-liquid separation scheme 4 that separates the boiled make-up water.

This multiple effect can transfers make-up water to the preheating pipe 2 of the subsequent effect can 1n.
The make-up water that has passed through the preheating tube 2 of the effect can II in the previous stage is supplied to the boiling heat transfer tube 3 of the effect can 1f, and the water is supplied to the boiling heat transfer tube 3 of the effect can 1f. It is heated by the heated steam 5 supplied to the 8 tubes, rises as a gas-liquid multiphase flow in the heat exchanger tube 3, is separated into gas and liquid in the gas-liquid separation chamber 4, and the steam is passed from the pipe 6 to the next stage of the effect can 1. As a heating source, one pline is supplied as make-up water to the next-stage effect canister 13 through piping 7, and the same evaporation operation is repeated thereafter. In addition, the hot steam 5 supplied to the can 1 in the previous stage is heated and then drained through the piping 8, but the hot steam 5 supplied to the can 1 in the next stage is drained through the pipe 8. The moss is supplied to the next pot 1n as distilled water through a pipe 9.

10 is a condenser connected to the effect can 1n of the final stage, and the body m11 through which heat sources such as distilled water supplied from the effect can 1n via piping 9 and steam etc. supplied via piping 6 is shown in Figure 2. As shown, the heat recovery fA11a and the heat exhaust section 1 are separated by the partition plate 12.
It is formed in two parts with 1b and each part 1iaSll.
A cooling pipe 13aJ3b through which seawater passes is provided in b. The cooling pipes 13m and 13b are connected to a pump 22 that supplies seawater, the outlet 14 of the cooling pipe 13a on the heat recovery side is connected to supply water to the multi-effect tank side, and the cooling pipe 13 on the exhaust heat side is connected to the cooling pipe 13a on the heat recovery side.
Seawater from outlet 15 of b is drained. On the other hand, 16 is the inlet of the steam heat source of the final stage effect can 1. It is taken out.

Reference numeral 18 and 19 denote a decarboxylation tower and a deaeration tower, in which the seawater discharged from the heat recovery side cooling pipe 13a of the condenser 10 is decarburized by addition of concentrated sulfuric acid in the decarboxylation tower 18, and then passed through the deaeration tower. In step 19, dissolved oxygen in seawater is removed.

20 is a pump for replenishing seawater from the degassing tower 19 to the effect tank 1, and 21 is a pump connected to the distilled water outlet 17 of the condenser 10.

In the above, seawater flows from the pump n to each cooling pipe 13a, 13b in the condenser 10. On the other hand, the heat source from the final stage 1n of the multi-effect can enters the heat recovery section 11& of the body 11 from the inlet 16 of the condenser 10, passes through the lower passage 12& of the partition plate 12, and flows to the heat exhaust section llb. The seawater passing through the cooling pipe 11& in the heat recovery section 11a exchanges heat with most of the heat source of the final stage utility can 1n, and the seawater passing through the cooling pipe 13b in the heat exhaust section 11b exchanges heat in the heat recovery section 11a. heat is exchanged with the heat source after heating. Therefore, most of the heat source of the utility can 1n is the cooling pipe 13a.
It is absorbed by the seawater passing through the decarbonation tower 18 and the degassing tower 19.
The water is supplied to the utility can 1 as make-up water through the water.

Further, the heat source passing through the exhaust heat section 11b is condensed and turned into fresh water, which is taken out from the outlet 17.

As explained above, the present invention is based on the cooling system connected to the final stage of the multi-effect can. The body of the vessel is divided into two parts, a heat recovery part and a heat exhaust part, and the heat source from the final stage can is made to flow from the heat recovery part to the waste heat part, and the cooling pipe in the heat recovery part is By using the passing seawater as make-up water for the multi-effect canister, heat can be effectively recovered.

[Brief explanation of the drawing]

Figure 1 is a diagram showing an embodiment of the condenser of the present invention incorporated into a desalination apparatus, and Figure 2 is a longitudinal sectional view of an embodiment of the condenser of the present invention. 1...Efficacy can 'JO...Condenser 11&...Heat recovery section iib...Exhaust heat section 13&, 13b...Cooling pipe agent Yugai Saifuji 2 people @ 1 diagram @ 2 Figure Procedure Amendment 1, Indication of the case Showa Year Patent Application No. 009026 2, Name of the invention Condensing device for desalination equipment 3, Person making the amendment Relationship to the case Patent applicant address 2 Otemachi, Chiyoda-ku, East East Chome 2 Kaori No. 1 name (
009) Ishikawajima Harima Uo Kogyo Co., Ltd. 4, Agent 6, Contents of the amendment'""-3, Detailed explanation of the invention" on page 1, line 14 of the specification, changed to "3. Detailed explanation of the invention" to correct. (2) 6th page 1, line 15, page 2, line 1s, 2nd page
On page OR line, page 2, line 1l, line 2, and page 5, line 1, amend the present invention j to 1 invention. (3) "The present invention" in the 17th line of the 51st line of the same book and the 18th line of the 5th or 5th line of the same book is amended to ``the present invention.''

Claims (1)

[Claims] In a condensing device for a desalination apparatus in which a condenser is connected to the final stage of a multi-effect can, the condenser is partitioned into a heat recovery section and a heat exhaust section, and a cooling pipe is provided in which a refrigerant passes through the heat recovery section and the heat exhaust section. The outlet side of the cooling pipe on the heat recovery section side is connected to supply the multi-effect can side, and the other outlet side is connected to the drainage side, and the heat source from the final stage of the multi-effect can is connected to the A condensing device for a desalination device that allows heat to flow from the heat recovery section to the waste heat section.