Heat storage type steam generation system

Abstract

The utility model discloses a heat storage type steam generation system which comprises a solid heat storage device, a steam generator, an air return duct and a fan. The solid heat storage device is provided with a low-temperature air inlet and a high-temperature air outlet; low-temperature gas generates high-temperature gas in the solid heat storage device, the high-temperature gas passes through a high-temperature air duct from a high-temperature air outlet and then enters a steam generator, a water inlet of the steam generator is connected with a water tank, and water flow enters the steam generator and then is heated to generate steam which is discharged from a steam outlet of the steam generator; one end of the return air duct is connected with a low-temperature gas outlet of the steam generator through the fan, and the other end is connected with a low-temperature air inlet of the solid heat storage device; the high-temperature air entering the steam generator exchanges heat and then enters the solid heat storage device from the low-temperature air inlet through the air return duct. The steam generator is energy-saving, environment-friendly and stable in steam output, equipment cost is reduced, and the temperature of high-temperature gas entering the steam generator is conveniently adjusted by additionally arranging the temperature reduction channel.

Description

Technical Field

[0001] The utility model relates to the technical field of steam generation, in particular to a heat storage type steam generation system. Background Art

[0002] Steam devices are generally mechanical equipment that uses the thermal energy of fuel or other energy sources to heat water into hot water or steam. The industrial field has a huge demand for water vapor. As far as current technology is concerned, in order to reduce the pollution caused by burning coal and oil, electric steam generators have been widely used.

[0003] The price of residential or commercial electricity is high during the peak period of daytime electricity consumption, and low during the low-peak period of nighttime electricity consumption. If part of the electricity consumption is adjusted to the low-peak electricity consumption period, the gap between the peak and valley values ​​of power supply can be greatly narrowed, alleviating the tension of daytime power supply. There are now a variety of heat storage devices that can convert electrical energy into thermal energy and store it.

[0004] Existing solid thermal storage steam generating devices are generally composed of energy storage units and steam generating units connected by various pipelines. There are many pipelines, which causes heat loss and reduces heat exchange efficiency. In addition, the temperature of the gas entering the steam generating unit is too high, which will affect the service life of the heat exchanger. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a heat storage type steam generation system, which is energy-saving and environmentally friendly, has stable steam output, and is convenient for adjusting the temperature of high-temperature gas entering the steam generator.

[0006] The technical solution of the utility model is: a heat storage type steam generation system, including a solid heat storage device and a steam generator, and also including a return air duct and a fan;

[0007] The solid heat storage device is provided with a low-temperature air inlet and a high-temperature air outlet; the high-temperature air outlet is connected to the high-temperature air inlet of the steam generator through a high-temperature air duct; low-temperature gas generates high-temperature gas in the solid heat storage device, and high-temperature gas enters the steam generator from the high-temperature air outlet through the high-temperature air duct, the water inlet of the steam generator is connected to the water tank, and the water flows into the steam generator and is heated to generate steam, which is discharged from the steam outlet of the steam generator; one end of the return air duct is connected to the low-temperature gas outlet of the steam generator through a fan, and the other end is connected to the low-temperature air inlet of the solid heat storage device; after the high-temperature air enters the steam generator for heat exchange, it enters the solid heat storage device from the low-temperature air inlet through the return air duct.

[0008] Furthermore, it also includes a cooling channel; the two ends of the cooling channel are respectively connected to the return air duct and the high-temperature air duct; a cooling valve is arranged on the cooling channel; and a return air valve is arranged near the low-temperature air inlet of the return air duct.

[0009] Furthermore, the cooling valve and the return air valve are connected to a PLC controller, a temperature sensor is provided at the high-temperature air outlet, the temperature sensor feeds back the detected temperature value at the high-temperature air outlet to the PLC controller, and the PLC controller controls the opening and closing and the opening degree of the cooling valve and the return air valve.

[0010] Furthermore, the solid heat storage device includes an insulation shell and a heat storage body; the heat storage body is arranged in the middle of the insulation shell, and air ducts are reserved on both sides. The low-temperature air inlet and the high-temperature air outlet of the insulation shell are located on the same side of the shell, and a partition is arranged between the low-temperature air inlet and the high-temperature air outlet to divide the side air duct into a low-temperature air duct and a high-temperature air duct.

[0011] Furthermore, the steam generator includes a heat exchanger, which is arranged in an insulation shell; an insulation section is arranged between the heat exchanger and the heat storage body, and a high-temperature air duct for high-temperature air flow is reserved between the top of the insulation section and the insulation shell; a cooling channel is arranged in the insulation section; a return air duct is arranged at the bottom of the insulation shell, and both ends of the cooling channel are respectively connected to the return air duct and the high-temperature air duct; the steam outlet pipe and the water inlet pipe of the steam generator pass through the holes reserved on the insulation shell and are respectively connected to the steam-water separator and the water tank.

[0012] Furthermore, a guide plate is arranged at the end of the air duct in the heat-insulating shell.

[0013] Furthermore, the water tank is connected to the steam generator through a water inlet pipe, and a metering pump, a pressure gauge, a pressure transmitter, a flow meter and a damping tank are arranged on the water inlet pipe; the metering pump, the pressure transmitter and the flow meter are all connected to the PLC controller.

[0014] Furthermore, the steam outlet is connected to a steam outlet pipe, and a steam-water separator, a steam flow meter and a check valve are arranged on the steam outlet pipe; the steam flow meter and the check valve are connected to a PLC controller.

[0015] The beneficial effects of the utility model are:

[0016] The steam generating system of the utility model uses a solid heat storage device as a heat source to heat the steam generating device, thereby heating water entering the steam generating device into steam, has the advantages of simple structure, reasonable design, energy saving, no pollution, etc., and realizes the continuous and stable generation of steam.

[0017] The utility model is provided with a temperature reducing air duct, and the low-temperature air flowing out from the steam generator air outlet is mixed with the high-temperature air from the steam generator air inlet, so as to adjust and control the temperature of the high-temperature gas, reduce equipment stress, and extend the service life of the heat exchanger.

[0018] The utility model is provided with a heat-insulating shell, and the solid heat storage device and the steam generator are integrated in the heat-insulating shell, which reduces the pipeline system, thereby reducing heat loss and improving heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the structure of Example 1.

[0021] Figure 2 This is a schematic diagram of the structure of Example 2. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be clearly and completely described below through specific implementation methods. Example 1

[0023] refer to Figure 1 A heat storage steam generation system of the utility model comprises a solid heat storage device, a steam generator, a return air duct and a fan;

[0024] In this embodiment, the solid heat storage device includes a heat-insulating shell 1 and a heat storage body 2. The heat storage body 2 is composed of a plurality of heat storage bricks.

[0025] A heat storage body 2 is arranged in the middle of the heat preservation shell 1, and air ducts are reserved on both sides of the heat storage body 2. The low-temperature air inlet and the high-temperature air outlet arranged in the heat preservation shell 1 are located on the same side of the shell, and a partition 3 is arranged between the low-temperature air inlet and the high-temperature air outlet to divide the side air duct into a low-temperature air duct 4 and a high-temperature air duct 5. A heating device is arranged in the heat preservation shell 1 to transfer heat to the heat storage body 2 for energy storage after heating.

[0026] The steam generator includes a heat exchanger 6, which is provided with an insulating shell; a return air duct 9 is provided at the bottom of the insulating shell, one end of the return air duct 9 is connected to the low-temperature gas outlet of the steam generator through a fan 12, and the other end is connected to the low-temperature air inlet of the solid heat storage device, and the inlet of the heat exchanger 6 is connected to the high-temperature air outlet.

[0027] The solid heat storage device and the steam generator of this embodiment can be independently arranged, and the outer shells are both heat-insulating shells.

[0028] Preferably, the heat storage body 2 and the heat exchanger 6 of the present embodiment are integrated in the insulation shell 1, and the insulation shell 1 is provided with an insulation section 7 between the heat exchanger 6 and the heat storage body 2, and the insulation section 7 divides the insulation shell 1 into a heat storage area and a heat exchange area; a high-temperature air duct for high-temperature air flow is reserved between the top of the insulation section 7 and the insulation shell 1; the steam outlet pipe and the water inlet pipe of the steam generator pass through the holes reserved on the insulation shell and are connected to the steam-water separator 10 and the water tank 11 respectively.

[0029] In this embodiment, the high-temperature air outlet is connected to the high-temperature air inlet of the heat exchanger 6 through the high-temperature air duct. The low-temperature gas is heated by the heat storage body in the solid heat storage device to generate high-temperature gas, which enters the heat exchanger 6 from the high-temperature air outlet through the high-temperature air duct. The water inlet of the heat exchanger 6 is connected to the water tank 11. After the water flows into the heat exchanger 6, it is heated to generate steam, which is discharged from the steam outlet of the heat exchanger 6; one end of the return air duct 9 is connected to the low-temperature gas outlet of the steam generator through the fan 12, and the other end is connected to the low-temperature air inlet of the solid heat storage device. After the high-temperature air enters the heat exchanger 6 for heat exchange, it enters the return air duct 9 and enters the solid heat storage device again from the low-temperature air inlet to be heated by the heat storage body.

[0030] The specific working process of the heat storage type steam generation system in this embodiment is as follows:

[0031] The solid heat storage device stores energy in advance, the water tank conveys water to the steam generator, the fan works, the low-temperature air entering from the low-temperature air inlet is converted into high-temperature gas after heat exchange in the solid heat storage device and output, the high-temperature gas enters the steam generator, the water in the water pipe of the steam generator is heated by the high-temperature air, vaporized, and converted into steam, the high-temperature gas passes through the steam generating device and exchanges heat, and then circulates through the fan into the solid heat storage device, after circulating in the solid heat storage device, the heat energy in the solid heat storage device is taken out, and enters the steam generating device again to heat the water in the steam generator, thereby realizing the continuous generation of steam in the steam generating device.

[0032] The utility model adopts a solid heat storage device to provide a stable heat source for the steam generator. The solid heat storage device can adopt electric heat storage, solar energy heat storage and the like.

[0033] In this embodiment, a guide plate is arranged at the end of the air duct in the heat-insulating shell to improve the airflow state, make the airflow flow smoothly, and reduce resistance.

[0034] In this embodiment, the water tank is connected to the steam generator through a water inlet pipe, and a metering pump, a pressure gauge, a pressure transmitter, a flow meter and a damping tank are provided on the water inlet pipe; the metering pump, the pressure transmitter and the flow meter are all connected to the PLC controller to control the water inlet amount and flow rate.

[0035] In this embodiment, the steam outlet is connected to a steam outlet pipe, on which a steam-water separator, a steam flow meter and a check valve are provided; the steam flow meter and the check valve are connected to a PLC controller to monitor the steam output in real time.

[0036] The heat storage steam generation system of this embodiment has a simple structure, omits the air valve on the air duct, and reduces pipeline connections, which reduces equipment costs on the one hand and reduces heat loss on the other.

[0037] Preferably, a rectifying grid is provided in the low-temperature air duct 4 . Example 2

[0038] This embodiment further includes a return air valve 13 and a temperature reducing valve 14 on the basis of the embodiment 1; the temperature reducing valve 14 is provided on the temperature reducing channel 8, and the return air valve 13 is provided near the low temperature air inlet of the return air duct. The temperature reducing valve 14 and the return air valve 13 are connected to the PLC controller, and a temperature sensor is provided at the high temperature air outlet. The temperature sensor feeds back the detected temperature value at the high temperature air outlet to the PLC controller, and the PLC controller controls the opening and closing and opening degree of the return air valve and the temperature reducing valve.

[0039] In this embodiment, a temperature sensor is set to detect the temperature in the high-temperature air duct, and the return air valve 13 and the cooling valve 14 are controlled by the PLC controller, so as to control the flow rate of the low-temperature air in the cooling channel and the flow rate of the low-temperature air entering the solid heat storage device, thereby adjusting the temperature of the high-temperature air. When the temperature of the high-temperature air is high, the flow rate of the low-temperature air in the cooling pipeline is increased, and the flow rate of the low-temperature air entering the solid heat storage device is reduced.

[0040] This embodiment uses the low-temperature air at the steam generator outlet to regulate the high-temperature air at the steam generator inlet, thereby avoiding heat loss, having a simpler structure, and being more power-saving and energy-saving.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be deemed to fall within the protection scope of the technical solution of the present invention.

Claims

1. A heat storage type steam generation system, comprising a solid heat storage device and a steam generator, characterized in that: It also includes return air duct and fan; The solid heat storage device is provided with a low-temperature air inlet and a high-temperature air outlet; the high-temperature air outlet is connected to the high-temperature air inlet of the steam generator through a high-temperature air duct; low-temperature gas generates high-temperature gas in the solid heat storage device, and high-temperature gas enters the steam generator from the high-temperature air outlet through the high-temperature air duct, the water inlet of the steam generator is connected to the water tank, and the water flows into the steam generator and is heated to generate steam, which is discharged from the steam outlet of the steam generator; one end of the return air duct is connected to the low-temperature gas outlet of the steam generator through a fan, and the other end is connected to the low-temperature air inlet of the solid heat storage device; after the high-temperature air enters the steam generator for heat exchange, it enters the solid heat storage device from the low-temperature air inlet through the return air duct.

2. A thermal storage steam generation system according to claim 1, characterized in that: It also includes a cooling channel; the two ends of the cooling channel are respectively connected to the return air duct and the high-temperature air duct; a cooling valve is arranged on the cooling channel; and a return air valve is arranged near the low-temperature air inlet of the return air duct.

3. A thermal storage steam generation system according to claim 2, characterized in that: The cooling valve and the return air valve are connected to the PLC controller. A temperature sensor is set at the high-temperature air outlet. The temperature sensor feeds back the detected temperature value at the high-temperature air outlet to the PLC controller. The PLC controller controls the opening and closing and opening degree of the cooling valve and the return air valve.

4. A thermal storage steam generation system according to claim 1, characterized in that: The solid heat storage device includes a heat insulation shell and a heat storage body; the heat storage body is arranged in the middle of the heat insulation shell, and air ducts are reserved on both sides. The low-temperature air inlet and the high-temperature air outlet of the heat insulation shell are located on the same side of the shell, and a partition is arranged between the low-temperature air inlet and the high-temperature air outlet to divide the side air duct into a low-temperature air duct and a high-temperature air duct.

5. A thermal storage steam generation system according to claim 1, characterized in that: The steam generator includes a heat exchanger, which is arranged in an insulation shell; an insulation section is arranged between the heat exchanger and the heat storage body, and a high-temperature air duct for high-temperature air flow is reserved between the top of the insulation section and the insulation shell; a cooling channel is arranged in the insulation section; a return air duct is arranged at the bottom of the insulation shell, and the two ends of the cooling channel are respectively connected to the return air duct and the high-temperature air duct; the steam outlet pipe and the water inlet pipe of the steam generator pass through the holes reserved on the insulation shell and are respectively connected to the steam-water separator and the water tank.

6. A thermal storage steam generation system according to claim 4 or 5, characterized in that: A guide plate is arranged at the end of the air duct in the heat-insulating shell.

7. A thermal storage steam generation system according to claim 1, characterized in that: The water tank is connected to the steam generator through a water inlet pipe, and a metering pump, a pressure gauge, a pressure transmitter, a flow meter and a damping tank are arranged on the water inlet pipe; the metering pump, the pressure transmitter and the flow meter are all connected to the PLC controller.

8. The heat storage steam generation system according to claim 1, characterized in that: The steam outlet is connected to a steam outlet pipe, on which a steam-water separator, a steam flow meter and a check valve are arranged; the steam flow meter and the check valve are connected to a PLC controller.

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