JP-7855868-B2 - Steam boiler

JP7855868B2JP 7855868 B2JP7855868 B2JP 7855868B2JP-7855868-B2

Inventors

岩尾光
牟田淳一
西内将平
松本宏典
近藤豪仁
田村祐人

Assignees

三浦工業株式会社

Dates

Publication Date: 20260511
Application Date: 20220210

Claims (7)

A steam boiler comprising an inner boiler containing a material to be processed, a jacket provided on the outside of the inner boiler, a steam supply means for supplying steam to the jacket, and a cooling water circulation means for circulating the cooling water between the jacket and a cooling water supply source, The cooling water circulation means comprises a supply channel, a return channel, a bypass channel, and a mixing means. The aforementioned supply channel is configured to supply cooling water from the cooling water supply source to the jacket, The condensate channel is configured to return condensate from the jacket to the cooling water supply source. The bypass road is configured to bypass the supply channel and the return channel, The mixing means is configured to mix cooling water from the cooling water supply source with the condensate flowing through the condensate channel via the bypass channel, so that the temperature of the condensate returned to the cooling water supply source is below a predetermined temperature.
A steam kettle according to claim 1, The aforementioned condensate channel is provided with a drain switching valve. The drain switching valve is configured to switch between draining the condensate or returning it to the cooling water supply source, depending on the temperature of the condensate , in a steam boiler.
A steam boiler according to claim 1 or claim 2, The mixing means is a steam boiler, which is a mixing valve provided in the condensate.
A steam kettle according to any one of claims 1 to 3, A steam boiler is provided with a first temperature sensor located on the jacket side of the connection point between the condensate and the bypass, and a bypass valve in the bypass.
A steam boiler according to claim 4, The bypass valve is opened and closed according to the temperature of the condensate detected by the first temperature sensor in the steam boiler.
A steam boiler according to claim 5 , The mixing means consists of the first temperature sensor and the bypass valve. The bypass valve is a control valve whose opening degree can be adjusted. The mixing means is configured to adjust the opening of the bypass valve according to the temperature of the condensate detected by the first temperature sensor, thereby keeping the temperature of the condensate below a predetermined temperature, in a steam boiler.
A steam kettle according to any one of claims 1 to 6 , A steam boiler is provided with a second temperature sensor located on the cooling water supply source side of the connection point between the condensate and the bypass.

Description

This invention relates to a steam kettle for heating an object to be processed using steam. Conventionally, there are steam kettles equipped with a jacket (steam chamber) on the outside of an inner pot that contains the food or other items to be processed. For example, the steam kettle disclosed in Patent Document 1 is capable of heating and cooling food by supplying steam and cooling water to the jacket. Patent No. 2889169 This is a schematic diagram showing a steam kettle 1 according to one embodiment of the present invention.Figure 1 is a flowchart showing the operation of the steam boiler 1.Figure 1 shows the flow paths of steam and condensed water in the heating process S1 of the steam kettle 1, indicated by thick lines.Figure 1 shows the flow paths of compressed air in the first compressed air supply process S2 and the second compressed air supply process S5 of the steam boiler 1, indicated by thick lines.Figure 1 shows the flow paths of the cooling water and condensate in the first cooling process S3 of the steam boiler 1, indicated by thick lines.In Figure 1, the first cooling step S3 of the steam boiler 1 shows the flow paths of the cooling water and condensate when the condensate is not returned to the chiller 100, with the lines shown in thick lines.Figure 1 shows the flow paths of the cooling water and condensate in the second cooling process S4 of the steam boiler 1, indicated by thick lines.This is a schematic diagram showing a steam kettle 1 according to a modified example of the present invention. The embodiments of the present invention will be described below. The various features shown in the embodiments below are interchangeable. Furthermore, each feature constitutes an independent invention. 1. Configuration of Steam Kettle 1 Figure 1 is a schematic diagram showing a steam kettle 1 according to one embodiment of the present invention. The steam kettle 1 of this embodiment is a kettle capable of heating and cooling food, which is the object to be processed. As shown in Figure 1, the steam boiler 1 of this embodiment comprises an inner boiler 2, a jacket 3, a steam supply means 4, a drain discharge means 5, a compressed air supply means 6, a cooling water circulation means 7, and a control means 10. In this embodiment, the cooling water circulation means 7 is connected to a chiller 100, which serves as a cooling water supply source. The chiller 100 may be an external component of the steam boiler 1 or it may be included as a component of the steam boiler 1. Each component will be described in detail below. The inner pot 2 is a hollow container with a bottom that opens upwards, and food is placed inside. The shape of the inner pot 2 is not particularly limited, and it may have a stirring device (not shown) inside for stirring the food. The jacket 3 is installed on the outside of the inner kettle 2. For example, in the illustrated example, the jacket 3 is installed to cover the lower region of the inner kettle 2. Steam, compressed air, or cooling water are supplied to the inside of the jacket 3, with the supply switching between them. The steam supply means 4 supplies steam from the boiler (boiler connection port) into the jacket 3. Specifically, the steam supply means 4 includes a steam supply passage 40 connecting the boiler (boiler connection port) and the jacket 3. A steam supply valve 41 is provided in the steam supply passage 40. The drain discharge means 5 discharges the condensed water (drain) from the steam supplied into the jacket 3. Specifically, the drain discharge means 5 includes a drain discharge passage 50, which is equipped with a steam trap 51 and a drain valve 52, in order from the upstream side. The downstream side of the drain discharge passage 50 is connected to an exhaust drain passage 54 via a drain switching valve 53, and the exhaust drain passage 54 is equipped with a check valve 55. The compressed air supply means 6 supplies compressed air from the compressed air source (compressor connection port) into the jacket 3. Specifically, the compressed air supply means 6 includes a compressed air supply passage 60, and the compressed air supply passage 60 is equipped with a compressed air supply valve 61 and a check valve 62, in that order from the upstream side. The cooling water circulation means 7 is configured to supply cooling water from the chiller 100, which serves as the cooling water supply source, into the jacket 3, and to discharge the cooling water from the jacket 3 and return it to the chiller 100. Specifically, the cooling water circulation means 7 comprises a supply channel 70, a return channel 80, and a bypass channel 90. The supply water channel 70 connects the chiller 100 and the jacket 3, and is configured to supply cooling water from the chiller 100 to the jacket 3. A cooling water supply valve 71 is provided in the supply water channel 70. In this embodiment, the steam supply channel 40 downstream of the steam supply valve 41, the compressed air supp