JPS6370032A - Open type degassing system in circulation type hot water feeding facility - Google Patents

Abstract

PURPOSE:To exhaust gas such as oxygen or chlorine and prevent a component element from being corroded by a method wherein a bypass circuit is removably arranged in the midway of a circulation circuit and a degassing circuit provided with an open type atomization and degassing box and a forcing pump is arranged in the midway of the bypass circuit. CONSTITUTION:Hot water heated by a heating heater 16 is outputted from a hot water reservoir 15, flowed in a circulation circuit 17. A part of the hot water is branched in the midway of the circuit into a bypass circuit 20, the remaining hot water flows in a branched conducting pipe 22 of a degassing circuit 22, injected or atomized from an atomization nozzle 25 within an open type atomization degassing box 23, corrosive gas such as oxygen or chlorine melted in the hot water is completely exhausted, passed through a degassing pipe 26, discharged into the surrounding atmosphere. The degassed hot water is stored at once in the open type atomization degassing box 23. The hot water is mixed with another hot water returned back to the circulation circuit 17 under an operation of the forcing pump 24 in a feeding-out pipe 22b and circulating in the circulation circuit 17 and then fed into a hot water reservoir 15 by a forcing pump 19. Subsequently, this operation is repeated to eliminate corrosive gas in the hot water of which volume is required to corrode the components.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is a method of discharging gases such as oxygen and chlorine contained in the vortex to the outside in a circulating hot water system that forcibly circulates hot water. This invention relates to an open deaerator for preventing corrosion.

(Prior Art) As shown in FIG. 2, in a circulating hot water supply system, hot water heated by a heater 2 in a hot water storage tank 1 is forcibly circulated in the direction of the arrow by a pump 3, and is supplied from a hot water tap 5 of a circulation pipe 4. The amount used is replenished from 4 fl s of elevated water through the water supply pipe 7.

In such circulating hot water equipment, water often leaks due to corrosion caused by gases such as oxygen and chlorine contained in the whirlpool, and for this reason, various deaerators are provided to remove corrosive gases.

An example of a conventional degassing device is a bubble separator shown in FIG. 3. In FIG. 6, 1 is a hot water storage D, 3 is a pump, 4 is a circulation pipe, 6 is an elevated water 4L, and 7 is a water supply pipe. 8 is a bubble separator installed in the middle of the circulation pipe 4, which includes a hollow large diameter section 8a;
Air cushion cylinder 8 provided on the upper surface of this hollow large diameter 18a
b, and an air vent pipe 8C provided on the upper plate of the air cushion cylinder 8b so as to be movable up and down.

In this bubble separator 8, when the bow enters the hollow large-diameter portion 8a, the flow velocity slows down, and the bubbles in the hot water are separated and accumulate in the cushion cylinder 8b, and this accumulated gas causes the air vent pipe 8C to rise. It is released into the atmosphere as a result.

(Refer to Utility Model Publication No. 55-91902.) As another example of the conventional deaerator, an air vent 11 is provided at the top of a cylindrical tank 10 as shown in FIG. There is an air separation device 14 which is provided with an inlet pipe 12 through which liquid flows in substantially tangentially to the inner surface of the tank, and an outflow pipe 13 through which liquid flows out substantially tangentially to the inner surface of the tank from the lower side wall of the tank 10. This air separating device 14 separates air from the liquid that flows into the tank 10 as it swirls and descends along the inner wall of the tank and accumulates in the upper part of the tank 10. 11, which is released into the atmosphere. (Refer to Utility Model Application No. 59-127708.) (Problems to be Solved by the Invention) By the way, the bubble separator 8 shown in FIG. The large air bubbles that originally existed in the pipe can be separated in the hollow large diameter part 8a, but the gases such as oxygen and chlorine dissolved in the vortex can be removed from the air cushion tube 8 because the hollow large diameter part 8a is sealed.
Since the pressure inside b is high, it cannot be degassed.

Furthermore, the air separation device 14 shown in FIG. Since the tank 10 is sealed and the pressure inside the tank 10 is high, it cannot be degassed.

For this reason, it is possible to install a full-fledged open-type deaerator in the middle of the circulation piping so that it does not interfere with hot water supply, but in order to achieve complete deaeration, the deaerator needs to be large, and the circulating hot water supply system The equipment requires a large installation space and is extremely expensive, making it impractical. Furthermore, in the case of a small deaerator, the amount of hot water soaked by the deaerator is regulated when the load fluctuates (intensive use of t'jjJ), so a shortage of hot water may occur.

(Purpose of the Invention) The present invention was made to solve the above problems, and is capable of degassing gases such as oxygen and chlorine in the amount necessary to prevent corrosion of the components of circulating hot water supply equipment, and moreover, To provide a low-cost open type deaerator that has good followability to load fluctuations, does not require a large installation space for circulating water heating equipment, and can be easily installed in existing circulating water heating equipment. The purpose is to

(Means for Solving the Problems) In order to solve the above-mentioned problems, an open type deaerator for a circulating hot water supply system according to the present invention has a bypass that is removably provided in the middle of the circulation circuit of a circulating hot water supply system. It consists of a circuit and a deaeration circuit which is provided in the bypass circuit and is provided with an open type spray deaeration box and a push-in boss in the middle.

(Function) According to the open type deaerator with the above configuration, the circulation circuit is circulated T!
A part of the flowing hot water is diverted to a bypass circuit, and the rest enters a deaeration circuit, where it is sprayed and deaerated in an open spray deaeration box, removing oxygen, chlorine, etc. dissolved in the vortex. Corrosive gases are completely degassed and released into the atmosphere. After deaeration, the hot water is returned to the circulation circuit through the bypass circuit by a forced pump, so that the amount of corrosive gas necessary to prevent corrosion is removed from the hot water flowing through the circulation circuit, and the hot water flows through the circulation circuit while the hot water is not in use. Corrosive gases such as oxygen and chlorine in the vortex gradually become diluted. In addition, even when hot water is used and water is supplied to the circulation circuit from an elevated water tank, the hot water flowing through the circulation circuit is always sprayed and degassed in the open spray deaeration box of the deaeration circuit. Since it returns to the post-circulation circuit, the amount of corrosive gas required to prevent corrosion can be degassed, and load fluctuations (intensive use of water) can be removed.
Since the flow of hot water is guaranteed by the bypass circuit, there is no need to worry about insufficient hot water.

(Example) An example of an open type deaerator for a circulating hot water supply system according to the present invention will be described with reference to FIG.
4ff, 16 C storage (rhJff ts internal CD heater, 17 is a circulation circuit, 18 is a hot water tap in the circulation circuit 17, 19 is a push pump in the circulation circuit 17. 20
2 is a bypass circuit detachably provided in the middle of the circulation circuit 17, and 21 is a joint portion thereof. 22 is a degassing circuit provided in parallel to the bypass circuit 20, and the degassing circuit 22 has an open type rr! i Dew deaeration box 2 and fish box push pump 24 are rented. That is, a branch introduction pipe 22a from the bypass circuit 20 of the degassing circuit 22 is introduced into the open type dew degassing box 23, and a spout nozzle 25 is provided at the tip thereof. A ventilation pipe 26 that opens to the atmosphere is provided on the upper surface, and a discharge pipe 22b is provided on the lower side of the open type seismic degassing box 23.
is provided and connected to the bypass circuit 20, and the outlet pipe 22
A forced pump 24 is provided at b. A control valve 27 is provided downstream of the branching portion of the bypass circuit 20 with the degassing circuit 22 . Furthermore, 28 is an elevated water tank for replenishing the used wood, and 29 is its water supply pipe.

The operation of the open type deaerator constructed as above will be explained. The hot water heated by the heating heater 16 in the storage 44Hs leaves the hot water storage tank 15 and flows through the circulation path 17, one part of the water is diverted to the bypass circuit 20, and the rest is sent to the branch introduction pipe 22 of the four degassing paths 22. a, and from the spray n nozzle 25 in the open spray deaeration box 23, I+! 1n, corrosive gases such as oxygen and chlorine dissolved in the hot water are completely degassed and released into the atmosphere through the ventilation pipe 26, and the degassed hot water is stored in the open spray degassing box 23. is temporarily stored. and outlet pipe 2
The hot water is returned to the circulation circuit 17 by the forced pump 24 of 2b, combined with the hot water circulating through the circulation circuit 17, and sent into the hot water storage tank 15 by the forced pump 19, where it is heated again to a constant temperature by the heating heater 16. It flows into the post-circulation circuit 17. Thereafter, the above action is reversed, and corrosive gases such as oxygen and chlorine dissolved in the hot water circulating through the circulation circuit 17 are degassed, and the vortex corrodes the components of the circulating hot water supply equipment. Corrosion is reliably prevented because the amount of corrosive gases such as oxygen and chlorine required for

Furthermore, even when a vortex is used in the hot water faucet 18 and water is supplied from the elevated water tank 28 to the circulation circuit 17, a portion of the hot water circulating through the circulation circuit 17 is diverted to the bypass circuit 20.
The remainder is degassed in the open type "1lfi deaeration box 23" of the deaeration circuit 22, and returned to the circulation circuit 17 after deaeration.
The water flowing through the circulation circuit 17 can always remove gases such as oxygen and chlorine in an amount necessary for corrosion prevention, and the hot water supply can follow load fluctuations well.

The amount of hot water flowing into the open spray deaeration box 23 can be adjusted using the branch introduction pipe 22a of the deaeration circuit 22 of the bypass circuit 20.
The opening degree of the control valve 27 downstream of the branch part of
It is done in stages.

(Effects of the Invention) As can be seen from the above description, the open deaerator for circulating water heating equipment according to the present invention provides the necessary amount of oxygen, chlorine, etc. to prevent corrosion of the components of the circulating water heating equipment. The corrosive gas can be easily degassed, and even if the load changes when hot water is used, the flow of water is guaranteed on the bypass circuit side, so there is no problem with hot water supply, and the followability is extremely good.

Furthermore, there is no need to increase the installation space for the circulating hot water supply equipment. In addition, since the bypass circuit with the deaeration circuit can be attached to and detached from the circulation circuit, by installing the joint part in the middle of the circulation circuit of existing circulating hot water equipment,
The open type degassing device of the present invention can be easily installed.

Furthermore, the uninvented open type deaerator has a simple structure and is therefore inexpensive to manufacture.

[Brief explanation of the drawing]

Fig. 1 is a system diagram of a circulating hot water supply system equipped with an open deaerator according to the present invention, Fig. 2 is a system diagram of a general circulating hot water supply system, and Fig. 3 is a system diagram of a conventional circulating hot water supply system with air bubbles as a deaerator. FIG. 4, a system diagram of a circulating hot water supply facility equipped with a separation device, is a schematic sectional view showing an air component B system as a conventional deaerator M. 15...Hot water tank 16...Heating heater 17.
... Circulation circuit 18 ... Hot water tap 19 ... Force pump 20 ... Bypass circuit 21 ... Joint part 22 ... Deaeration circuit 22a ... Branch introduction pipe
22b... Outlet pipe 23... Open type spray deaeration box 24... Push pump 25... Spray nozzle
26...Vent pipe 27...Control valve
28... Elevated water tank 29... Water supply pipe

Claims (1)

[Claims] A circulating hot water supply system consisting of a bypass circuit removably installed in the middle of the circulation circuit of a circulating hot water supply equipment, and a deaeration circuit provided in the bypass circuit and equipped with an open spray deaeration box and a push pump in the middle. Equipment open deaerator.