CN-224215920-U - Heat exchanger and heat accumulating combustion system

CN224215920UCN 224215920 UCN224215920 UCN 224215920UCN-224215920-U

Abstract

The utility model discloses a heat exchanger, which relates to the technical field of aluminum water refining and comprises a joint valve, a first heat storage box and a second heat storage box, wherein the joint valve is provided with a first interface, a second interface, a third interface and a fourth interface which are mutually communicated, the first interface is opposite to the third interface, the second interface is opposite to the fourth interface, the first interface is communicated with a high-temperature flue gas pipeline, the third interface is communicated with a burner, the second interface is communicated with the first heat storage box, the fourth interface is communicated with the second heat storage box, a stop piece is arranged in the joint valve, in a first state, the stop piece is communicated with the first interface and the second interface, the third interface is communicated with the fourth interface, in a second state, the stop piece is communicated with the first interface and the fourth interface, and the second interface is communicated with the third interface. The utility model also discloses a heat accumulating combustion system which comprises the heat exchanger. The utility model can realize heat exchange, and the gas in the burner is not reversed, so that the furnace pressure is stable and the service life is long.

Inventors

HUANG BIN
Yue Yunhui
XIAO GUANGXIN
ZHANG LUNING
LIU YING
XIE KAI

Assignees

沈阳东大三建工业炉制造有限公司

Dates

Publication Date: 20260508
Application Date: 20250515

Claims (10)

1. A heat exchanger is characterized by comprising a connector valve, a first heat storage box and a second heat storage box, wherein the connector valve comprises a valve body and a stop piece, a stop cavity is formed in the valve body, a first connector, a second connector, a third connector and a fourth connector which are all communicated with the stop cavity are arranged on the valve body, the first connector is communicated with a high-temperature flue gas pipeline, the third connector is communicated with a preheated air discharge pipeline communicated with a burner, the second connector is communicated with the first heat storage box, the fourth connector is communicated with the second heat storage box, the stop piece is arranged in the stop cavity, the connector valve is in a first state and a second state, the stop piece rotates to enable the connector valve to change from the first state to the second state, when the connector valve is in the first state, the first connector is communicated with the second connector, the third connector is communicated with an air flow direction, when the third connector is communicated with the fourth connector, the second connector is communicated with the second heat storage box, and the second heat storage box can be communicated with the air flow to the second heat storage box, and the second heat storage box can be communicated with the air.
2. The heat exchanger of claim 1, further comprising a driving member, wherein the connector valve further comprises a valve cover, the stop member is a valve plate, the valve cover and the valve body can be covered, the middle part of the valve plate is rotatably arranged on the valve cover, and the driving member is arranged on the valve cover and connected with the valve plate and can drive the valve plate to rotate.
3. The heat exchanger of claim 1, wherein the first port is disposed opposite to the third port, the second port is disposed opposite to the fourth port, when the connector valve is in a first state, two ends of the blocking member respectively abut against a lower edge of the second port and an upper edge of the fourth port, the first port is communicated with the second port, the third port is communicated with the fourth port, and when the connector valve is in a second state, two ends of the blocking member respectively abut against an upper edge of the second port and a lower edge of the fourth port, the first port is communicated with the fourth port, and the second port is communicated with the third port.
4. The heat exchanger of claim 3, wherein the air pipeline comprises an air inlet pipe, an air outlet pipe and a first pipeline and a second pipeline which are arranged in parallel, wherein both ends of the first pipeline and the second pipeline are respectively communicated with the air inlet pipe and the air outlet pipe, the air inlet pipe is communicated with the air blower, the air outlet pipe is communicated with the induced draft fan, the middle part of the first pipeline is communicated with the first heat storage tank, a first valve and a second valve are respectively arranged on both sides of the communication part of the first pipeline and the first heat storage tank, the middle part of the second pipeline is communicated with the second heat storage tank, and a third valve and a fourth valve are respectively arranged on both sides of the communication part of the second pipeline and the second heat storage tank.
5. The heat exchanger of claim 4, wherein the first heat storage tank and the second heat storage tank each comprise an upper tank body, a middle tank body and a lower tank body which are sequentially arranged from top to bottom and communicated, the upper tank body of the first heat storage tank is used for being communicated with the second interface, the lower tank body of the first heat storage tank is used for being communicated with the first pipeline, the upper tank body of the second heat storage tank is used for being communicated with the fourth interface, and the lower tank body of the second heat storage tank is used for being communicated with the second pipeline.
6. The heat exchanger of claim 5, wherein the upper cases of the first and second heat storage cases are provided with ball loading gates for loading heat storage balls, and the middle cases of the first and second heat storage cases are provided with ball discharging gates for discharging the heat storage balls, and a section steel supporting and screening is further arranged between the middle case and the lower case.
7. The heat exchanger of claim 1, wherein the bottoms of the first and second heat storage tanks are each provided with rollers.
8. The heat exchanger of claim 1, wherein the first heat storage tank and the second heat storage tank are connected with the connector valve through flanges, a first flange plate and a plurality of movable buckles are arranged on the first heat storage tank and the second heat storage tank, a second flange plate is arranged on the connector valve, grooves are formed in the first flange plate and the second flange plate, the movable buckles comprise a fixing seat, a screw rod and a locking nut, the fixing seat is fixedly connected to the first flange plate, a first end of the screw rod is connected with the fixing seat in a rotating mode, the locking nut is connected to a second end of the screw rod, the screw rod can enter the grooves in the first flange plate and the grooves in the second flange plate through rotation of the screw rod, and the second flange plate can be pressed with the first flange plate through screwing of the locking nut.
9. The heat exchanger of claim 8, wherein the movable buckle further comprises a rotating shaft and a hand wheel, the fixed seat comprises two fixed sheets, the two fixed sheets are respectively and fixedly arranged on two sides of the groove on the first flange plate, the rotating shaft is rotatably arranged on the fixed seat, the screw rod can penetrate through the rotating shaft and is fixedly connected, the hand wheel is fixedly connected with the locking nut, and the locking nut is in threaded connection with the screw rod.
10. A regenerative combustion system comprising a heat exchanger as claimed in any one of claims 1 to 9.

Description

Heat exchanger and heat accumulating combustion system Technical Field The utility model relates to the technical field of aluminum water refining, in particular to a heat exchanger and a heat storage combustion system. Background The heat accumulating type high temperature air combustion technology (HTAC) is a combustion technology with a brand new concept appearing at the end of the 80 th century, and organically combines the technology of recycling waste heat, efficient combustion, NO reduction, NO emission reduction and the like, thereby realizing the dual aims of saving energy and reducing NO emission. With the progress of equipment and materials, the regenerative high-temperature air combustion technology is widely applied to metallurgical enterprises. However, this technology has great energy saving potential and also has some own problems. For example, in the nonferrous metallurgical industry, for aluminum melting furnaces, the temperature inside the furnace varies greatly due to its process characteristics. The traditional technology relies on reversing, the burners work in pairs, each burner burns and discharges smoke alternately, one of the burners burns, air is preheated through a heat storage box connected with the burner during burning, after a period of time, the temperature in the heat storage box is consumed, the other burner pumps high-temperature smoke in the furnace back into the heat storage box, the heat storage box connected with the burner is heated, circulation is repeated, and the fact that the preheated air is used by the burner is guaranteed. Switching back and forth between combustion and smoke exhaust tends to cause furnace pressure fluctuation, and frequent reversing causes the regulating valve to be damaged. The combustion system caused by the failure of the reversing equipment cannot work so as to directly influence the production, and certain potential safety hazards exist. Although the frequency of the reversing can be reduced for the intermittent reversing type burner, the requirement of the intermittent reversing on reversing devices is increased, which is equivalent to the increase of investment of reversing parts, and the reversing still exists, so that the burner still has the problems. Therefore, a heat exchanger and a regenerative combustion system are needed to solve the above technical problems. Disclosure of utility model The utility model aims to provide a heat exchanger and a heat accumulating combustion system, which are used for solving the problems in the prior art, and can realize heat exchange without reversing gas in a burner, so that the furnace pressure is stable and the service life is long. In order to achieve the above object, the present utility model provides the following solutions: The utility model provides a heat exchanger, which comprises a connector valve, a first heat storage box and a second heat storage box, wherein the connector valve comprises a valve body and a stop piece, a stop cavity is formed in the valve body, a first connector, a second connector, a third connector and a fourth connector which are all communicated with the stop cavity are arranged on the valve body, the first connector is used for being communicated with a high-temperature flue gas pipeline, the third connector is used for being communicated with a preheated air discharge pipeline communicated with a burner, the second connector is used for being communicated with the first heat storage box, the fourth connector is used for being communicated with the second heat storage box, the stop piece is arranged in the stop cavity, the connector valve is provided with a first state and a second state, the stop piece rotates to enable the connector valve to change from the first state to the second state, when the connector valve is in the first state, the first connector is communicated with the second connector, the third connector is communicated with a combustion air flow to the fourth connector, when the connector is in the first state, the second connector is communicated with the second heat storage box, and the combustion air can flow to the second heat storage box, and the air can flow to the second heat storage box through the first connector and the second heat storage box. In some embodiments, the connector valve further comprises a valve cover, the stop member is a valve plate, the valve cover and the valve body can be covered, the middle part of the valve plate is rotationally arranged on the valve cover, and the driving member is arranged on the valve cover and connected with the valve plate and can drive the valve plate to rotate. In some embodiments, the first interface is opposite to the third interface, the second interface is opposite to the fourth interface, when the connector valve is in the first state, two ends of the stop member respectively abut against a lower edge of the second interface and an upper edge of the fourth interface, the first interfa