JPS6330007Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an incinerator heat exchange device, and more particularly to an incinerator heat exchange device of a type that performs heat exchange while supplying water to a heat exchange element provided in an incinerator.

In response to demands for energy conservation, incinerators are equipped with heat exchange equipment to recover thermal energy.
FIG. 1 is a schematic diagram of a conventionally used fluidized bed incinerator. A heat exchanger 2 such as a heat transfer water tube is provided in the fluidized bed of the fluidized bed incinerator 1, and water is supplied to the heat exchanger 2 to perform heat exchange. Industrial water and other water are used as this water supply source.

However, with conventional incinerator heat exchange equipment, there are problems in securing a water source for the heat exchanger 2 and a destination for hot water treatment after heat exchange, and the installation space and equipment costs for these are large. It lacked practicality.

The purpose of the present invention is to eliminate the above-mentioned conventional drawbacks, and to provide an incinerator heat exchange device that can secure a water supply without installing new water supply equipment for heat exchange.

In other words, the present invention diverts the boiler feed water from the existing boiler equipment to the heat exchange equipment, eliminating the need for new water supply equipment for the heat exchange equipment. The incinerator is connected in parallel with the level control valve of the deaerator, and a second valve, ie, a blow valve or a deaerator bypass control valve, operates in the opposite direction to the level control valve on the inlet side of the deaerator. The system is designed to prevent level fluctuations in the deaerator by providing water supply from the boiler equipment.

FIG. 2 is a system diagram showing the first embodiment of the present invention. In FIG. 2, an example in which a boiler facility and a heat exchange device are combined is shown. Boiler water supply 3
is stored in the boiler water supply tank 4, and then is supplied to the deaerator 7 via the level control valve 6 by the water supply pump 5 via the boiler water supply channel that supplies water from the boiler water supply tank 4 to the boiler 9. . Here, the level control valve 6 is adjusted so as to maintain the predetermined value of the level controller 15. The water in the deaerator 7 is supplied to the boiler 9 by a pump 8 via a boiler water supply channel.
Water is sent to This boiler 9 heats feed water using a heating device and generates steam 10. A part of the steam generated in the boiler 9 is condensed in a condenser 11, and this condensate 12 is sent to a condensate tank 13 and stored therein. The condensate stored in the condensate tank 13 is returned to the water supply tank 4 by the condensate pump 14.

A heat exchange device is coupled to the boiler equipment formed as described above. That is, on the outlet side of the water supply pump 5,
A branch path is provided to branch from the boiler water supply channel to the deaerator 7 and supply water to the heat exchanger 2, and the heat exchanger 2 provided in the incinerator 1 is connected via a valve 16 in the branch path. Connect. A water supply channel that is connected to the outlet side of the heat exchanger 2 and supplies water to the deaerator 7 is connected to the inlet side of the deaerator 7, and branches from the water supply channel to supply water and heat exchange to the deaerator 7. A regulating waterway is provided for the purpose of preventing the vessel 2 from being heated dry, and a blow valve 17 is connected to the regulating waterway. The blow valve 17 has a function of adjusting the amount of water supplied to the deaerator 7 by adjusting the flow rate of the regulating waterway. The blow valve 17 and the level control valve 6 are controlled by a level control meter 15 based on the level value of the deaerator 7. The operation of the embodiment of the present invention having the above configuration will be described below.

In boiler water supply equipment, when the level control valve 6 is open and the deaerator 7 is in operation, the valve 16
A part of the water supplied from the water supply tank 4 is sent to the heat exchanger 2 via the heat exchanger 2, and the output thereof is sent to the deaerator 7.
Therefore, heat exchange can be performed without providing a dedicated water supply facility for the heat exchanger 2.

Next, if the level of the deaerator 7 is the specified value,
Furthermore, when the level control valve 6 is in a closed state, the feed water that has passed through the heat exchanger 2 of the incinerator 1 flows into the deaerator 7. Therefore, the level of the deaerator 7 rises even though the level control valve 6 is in the closed state. The blow valve 17 functions to suppress such a level increase. That is, when the level of the deaerator 7 exceeds a certain value, the upper limit contact in the level control valve 6 is activated, and in conjunction with the operation of the upper limit contact, the blow valve 17 is opened, and the feed water that has exited the heat exchanger 2 is It is discharged into a tank or pit through the blow valve 17. When the level of the deaerator 7 returns to a normal value, the blow valve 17 is automatically returned to the closed state.
This operation is performed by a level controller 15 that operates based on the level detected by the deaerator 7. Therefore, the blow valve 17 and the level control valve 6 have opposite valve opening characteristics.

By diverting a portion of the water supply from the boiler water supply equipment in this way, a water source for the heat exchange device can be secured without requiring additional equipment.

FIG. 3 is a system diagram showing a second embodiment of the present invention. This embodiment differs from the embodiment shown in FIG. 2 in that a bypass control valve 18 is provided in place of the blow valve 17. This bypass control valve 18 functions to perform a reverse operation with respect to the level control valve 6, thereby maintaining the level of the deaerator 7 at a constant value. Both the bypass control valve 18 and the level control valve 6 are controlled by the level controller 15 so as to operate in opposite directions. The other configurations and operations are the same as the example shown in FIG. 2, so their explanation will be omitted.

Note that the bypass control valve 18 is controlled by a level controller 15 via a restrictor 19. In this case, the restrictor 19 functions to prevent the valve opening degree of the bypass control valve 18 from closing below a certain value.
Thereby, the heat exchanger 2 can ensure a minimum amount of water supply. The level control valve 6 and the bypass control valve 18 are
The valve opening operation is exactly opposite to the level value of the deaerator 7. That is, the valve opening characteristic of the bypass control valve 18 as shown in FIG. 5 is set for the valve opening characteristic of the level control valve 6 as shown in FIG. The reason why the constant value is shown is due to the provision of the limiter 19). By operating both control valves at the same time, the water level in the deaerator 7 becomes constant and does not fluctuate.

Note that the water discharged by the bypass control valve 18 is returned to the condensate tank 13. With this configuration, the water supply system can be made into a closed loop, and wasteful use of boiler supply water can be prevented.

The embodiment shown in FIG. 3 has the feature that continuous level control is possible, as opposed to the batch control of the embodiment shown in FIG.

FIG. 6 is a system diagram showing a third embodiment of the present invention. This embodiment differs from the embodiment shown in FIG. 3 in that the output destination of the heat exchanger 2 and the control method of the bypass control valve 18 are different. That is, the output destination of the heat exchanger 2 is set to the inlet side of the level control valve 6, and the bypass control valve 18 is controlled based on the output signal of the flow meter 20 that measures the flow rate of water supplied to the heat exchanger 2. It is something. The output signal of the flowmeter 20 is the limiter 1
9 is used to control the bypass control valve 18.
As a result, even when the level control valve 6 is in the closed state, a certain amount of water flows through the bypass control valve 18, and the minimum flow rate of water supply to the heat exchanger tubes forming the heat exchanger 2 is ensured. The level adjustment of the deaerator 7 is performed only by the level control valve 6, but when the level control valve 6 is in the open state, the measured value of the flowmeter 20 increases accordingly, and the bypass control valve 1
8, the valve opening degree becomes smaller. Therefore, although the level control valve 6 and the bypass control valve 18 are controlled by separate systems, the valve opening characteristics shown in FIGS. 4 and 5, that is, the inverse valve openings of the level control valve and the bypass control valve It must satisfy the following characteristics.

As is clear from the above, according to the present invention, the heat exchanger of the incinerator can be operated by diverting a portion of the water supply from the boiler equipment without installing a dedicated water supply source. This eliminates the need for water supply equipment compared to conventional systems, allowing for the elimination of equipment space and reduction in equipment costs.

Furthermore, by providing a bypass control valve,
Water supply to the heat exchanger can be controlled without affecting the control system on the boiler equipment side. In addition, by returning the water supply on the outlet side of the heat exchanger to the condensate tank of the boiler equipment to form a closed loop, the boiler supply water can be reused without waste, and resources can be reused.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a fluidized bed incinerator, Fig. 2 is a system diagram showing the first embodiment of the present invention, Fig. 3 is a system diagram showing the second embodiment of the invention, Fig. 4 5 is a valve opening characteristic diagram of the level control valve 6 according to the present invention, FIG. 5 is a valve opening characteristic diagram of the bypass control valve 18 according to the present invention, and FIG. 6 is a system showing a third embodiment of the present invention. It is a diagram. 1... Incinerator, 2... Heat exchanger, 4... Boiler water supply tank, 5... Water supply pump, 6... Level control valve, 7... Deaerator, 8... Pump, 9... Boiler, 11... Condenser, 13... Condensate tank, 14
...Condensate pump, 15...Level controller, 17...
...Blow valve, 18... Bypass control valve, 19...
Restrictor, 20...flow meter.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Heat exchanger formed by heat transfer water pipes and installed in the incinerator, and installed in the boiler water supply channel that introduces boiler feed water to the deaerator that constitutes the boiler equipment. a first valve branched from the boiler water supply channel and connected to the inlet side of the heat exchanger; and a water supply connected from the outlet side of the heat exchanger to the inlet side of the deaerator. a regulating channel branched from the water supply channel, and a second valve provided in the regulating channel, the second valve having a valve opening characteristic opposite to that of the first valve, An incinerator heat exchange device, characterized in that the amount of water supplied to the deaerator through the heat exchanger is adjusted. 2. The incinerator heat exchange device according to claim 1, wherein the second valve is a blow valve. 3. The incinerator heat exchange device according to claim 1, wherein the second valve is a control valve that is controlled according to the flow rate of the water supply passing through the heat exchanger.