Desalted water deoxidizing system of oxidizing furnace

Abstract

The utility model discloses a demineralized water deoxidizing system of an oxidizing furnace. The demineralized water deoxidizing system comprises the oxidizing furnace, a flue, a first heat exchanger and a deaerator, the flue is connected with the oxidizing furnace and the first heat exchanger; the first heat exchanger is connected with the deaerator, located on the tail gas outlet side of the oxidizing furnace and used for exchanging heat with tail gas from the oxidizing furnace through a first heat exchange medium circulating in the first heat exchanger and conveying the first heat exchange medium obtained after heat exchange to the deaerator. And the deaerator is used for heating and deoxidizing demineralized water through the first heat exchange medium to obtain deoxygenated water. The first heat exchange medium circulating in the first heat exchanger exchanges heat with tail gas from the oxidation furnace, the first heat exchange medium after heat exchange is conveyed to the deaerator, demineralized water is heated and deoxygenated in the deaerator through the first heat exchange medium to obtain deoxygenated water, and heat of the tail gas of the oxidation furnace is utilized, so that heat loss of the oxidation furnace can be reduced, and the service life of the oxidation furnace is prolonged. Therefore, the energy consumption of the oxidizing furnace is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of oxidation furnaces, and in particular relates to a deionized water and deoxygenation system for an oxidation furnace. Background Art

[0002] The flue gas generated at the tail of the oxidation furnace is generally discharged after treatment. The tail gas temperature is generally around 180°C. Direct discharge of the tail gas will cause a large heat loss in the oxidation furnace and increase the energy consumption of the oxidation furnace. Utility Model Content

[0003] In order to solve the technical problem in the prior art that direct discharge of oxidation furnace tail gas will cause large heat loss of the oxidation furnace and increase the energy consumption of the oxidation furnace, the present application provides an oxidation furnace desalted water deoxygenation system.

[0004] The present application provides an oxidation furnace desalted water deoxygenation system, comprising an oxidation furnace, a flue, a first heat exchanger and a deaerator, wherein:

[0005] The flue is connected to the oxidation furnace and the first heat exchanger;

[0006] The first heat exchanger is connected to the deaerator and is located at the outlet side of the tail gas of the oxidation furnace, and is used to exchange heat with the tail gas from the oxidation furnace through the first heat exchange medium flowing through the first heat exchanger, and transport the first heat exchange medium after heat exchange to the deaerator;

[0007] The deaerator is used to heat and deoxygenate the desalted water by using the first heat exchange medium to obtain deoxygenated water.

[0008] In some optional embodiments, a steam drum is further included, wherein the steam drum is connected to the deaerator and is used to receive deoxygenated water from the deaerator.

[0009] In some optional embodiments, the deaerator is also connected to a steam inlet pipe, and the steam inlet pipe is used to input steam into the deaerator.

[0010] In some optional embodiments, a second heat exchanger is further included which is located on a side of the oxidation furnace away from the first heat exchanger. The second heat exchanger is connected to the flue and to the steam drum and is used for exchanging heat with the steam drum and heating the gas in the flue by the heat of the heat exchange.

[0011] In some optional embodiments, the second heat exchanger is connected to the steam drum via a heat exchange inlet pipe and a heat exchange outlet pipe so as to heat the gas in the flue through the second heat exchange medium of the steam drum.

[0012] In some optional embodiments, a feed water pump is further included, wherein the feed water pump is connected to the deaerator and the steam drum respectively, and is used to pump deoxygenated water in the deaerator into the steam drum.

[0013] In some optional embodiments, an induced draft fan is further included, and the induced draft fan is connected to one end of the flue close to the first heat exchanger, and is used to guide the flue gas to the first heat exchanger.

[0014] In some optional embodiments, the first heat exchanger is provided with a medium input line and a medium output line, and the medium output line is connected to the deaerator.

[0015] In some optional embodiments, the medium input line and the medium output line are connected via a bypass line, and a bypass valve is provided on the bypass line.

[0016] In some optional embodiments, the medium input line is provided with a switch valve at a position close to the first heat exchanger.

[0017] Compared with the prior art, the oxidation furnace desalted water deoxygenation system provided by the utility model has the following beneficial effects:

[0018] The first heat exchange medium circulating in the first heat exchanger exchanges heat with the exhaust gas from the oxidation furnace, and the first heat exchange medium after heat exchange is transported to the deaerator. The desalted water is heated and deoxygenated in the deaerator by the first heat exchange medium to obtain deoxygenated water. The heat of the exhaust gas from the oxidation furnace is utilized, which can reduce the heat loss of the oxidation furnace and thus reduce the energy consumption of the oxidation furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The schematic diagram of the structure of the desalted water and deoxygenation system of the oxidation furnace in one or more embodiments of the utility model is shown.

[0020] Explanation of the reference numerals: 1-oxidation furnace, 11-water supply pipe; 2-flue; 3-first heat exchanger, 31-medium input line, 311-on / off valve, 32-medium output line, 33-bypass line, 331-bypass valve; 4-deaerator, 41-steam inlet pipe; 5-steam drum, 51-heat exchange inlet pipe, 52-heat exchange outlet pipe; 6-second heat exchanger; 7-water supply pump; 8-induced draft fan. DETAILED DESCRIPTION

[0021] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0022] Please refer to Figure 1 As shown, the embodiment of the present application provides an oxidation furnace desalted water deoxygenation system, comprising an oxidation furnace 1, a flue 2, a first heat exchanger 3 and a deaerator 4, wherein:

[0023] The flue 2 is connected to the oxidation furnace 1 and the first heat exchanger 3; the flue 2 is connected to both ends of the oxidation furnace 1, and the flue 2 is built into the first heat exchanger 3; the oxidation furnace 1 is provided with a water supply pipe 11, and the water supply pipe 11 supplies water to the oxidation furnace 1.

[0024] The first heat exchanger 3 is connected to the deaerator 4 and is located at the outlet side of the exhaust gas of the oxidation furnace 1, and is used to exchange heat with the exhaust gas from the oxidation furnace 1 through the first heat exchange medium flowing in the first heat exchanger 3, and transport the first heat exchange medium after heat exchange to the deaerator 4; when the high-temperature flue gas generated during the incineration process of the oxidation furnace 1 is transported to the tail of the flue 2 through the flue 2 and reaches the first heat exchanger 3, the remaining flue gas temperature is about 180°C, the first heat exchange medium exchanges heat with the exhaust gas from the oxidation furnace 1, and the first heat exchange medium after heat exchange is sprayed into the deaerator 4 through the upper injection head of the deaerator 4. The first heat exchange medium here can be condensed water;

[0025] The deaerator 4 is used to heat and deoxygenate the desalted water with the first heat exchange medium to obtain deoxygenated water. The first heat exchange medium is heated and deoxygenated with the low-temperature desalted water inside the deaerator 4 to obtain deoxygenated water, which can reduce the heat loss of the oxidation furnace 1.

[0026] The desalted water deoxygenation system for an oxidation furnace provided in an embodiment of the present application exchanges heat with the exhaust gas from the oxidation furnace 1 through the first heat exchange medium flowing in the first heat exchanger 3, and the first heat exchange medium after heat exchange is transported to the deaerator 4. The desalted water is heated and deoxygenated in the deaerator 4 by the first heat exchange medium to obtain deoxygenated water, and the heat of the exhaust gas from the oxidation furnace 1 is utilized, which can reduce the heat loss of the oxidation furnace 1, thereby reducing the energy consumption of the oxidation furnace 1.

[0027] In some optional embodiments, the deionized water deoxygenation system of the oxidation furnace further includes a steam drum 5, which is connected to the deaerator 4 and is used to receive deoxygenated water from the deaerator 4. The deoxygenated water obtained by the deaerator 4 is supplied to the steam drum 5, so that the deoxygenated water obtained by the deaerator 4 is utilized, thereby utilizing the heat of the tail gas of the oxidation furnace 1.

[0028] In some optional embodiments, the deaerator 4 is further connected to a steam inlet pipe 41, and the steam inlet pipe 41 is used to input steam into the deaerator 4. Steam is input into the deaerator 4 through the steam inlet pipe 41, and the condensed water spray can be more atomized by the steam, thereby increasing the contact area between the condensed water and the desalted water, thereby improving the heat exchange efficiency and accelerating the deoxygenation speed.

[0029] In some optional embodiments, the desalted water deoxygenation system of the oxidation furnace further includes a second heat exchanger 6 located on the side of the oxidation furnace 1 away from the first heat exchanger 3, the second heat exchanger 6 is connected to the flue 2 and the steam drum 5, and is used to exchange heat with the steam drum 5, and heat the gas in the flue 2 by the heat exchange. The flue 2 is built through the second heat exchanger 6, and the second heat exchanger 6 is located on the side of the oxidation furnace 1 away from the first heat exchanger 3, and exchanges heat with the steam drum 5 through the second heat exchanger 6, and heats the gas in the flue 2 by the heat exchange, so that the flue 2 maintains a certain temperature, thereby reducing heat loss.

[0030] In some optional embodiments, the second heat exchanger 6 is connected to the steam drum 5 through a heat exchange inlet pipe 51 and a heat exchange outlet pipe 52, so as to heat the gas of the flue 2 through the second heat exchange medium of the steam drum 5. The second heat exchange medium enters the second heat exchanger 6 through the heat exchange inlet pipe 51, and then returns to the steam drum 5 through the heat exchange outlet pipe 52. The second heat exchange medium heats the gas of the flue 2 during the circulation process, so that the flue 2 maintains a certain temperature, thereby reducing heat loss. The second heat exchange medium here is steam.

[0031] In some optional embodiments, the deionized water deoxygenation system of the oxidation furnace further includes a feed water pump 7, which is connected to the deaerator 4 and the steam drum 5, respectively, and is used to pump the deoxygenated water in the deaerator 4 into the steam drum 5. By pressurizing the deoxygenated water in the deaerator 4 with the feed water pump 7 and then pumping it into the steam drum 5, the deoxygenated water can be pumped into the steam drum 5 faster, thereby improving the transportation efficiency of the deoxygenated water.

[0032] In some optional embodiments, the desalted water deoxygenation system of the oxidation furnace further includes an induced draft fan 8, which is connected to one end of the flue 2 close to the first heat exchanger 3, and is used to guide the flue gas to the first heat exchanger 3. The flue gas is guided to the first heat exchanger 3 by the induced draft fan 8, so that the heat of the flue gas can reach the first heat exchanger 3 faster, and more heat can be exchanged by the first heat exchanger 3, thereby improving the utilization rate of heat.

[0033] In some optional embodiments, the first heat exchanger 3 is provided with a medium input line 31 and a medium output line 32, and the medium output line 32 is connected to the deaerator 4. The medium input line 31 inputs the first heat exchange medium to the first heat exchanger 3, and the medium output line 32 conveys the first heat exchange medium to the deaerator 4. The first heat exchange medium exchanges heat with the flue gas of the flue 2, and then passes into the deaerator 4 to heat and deoxygenate the deionized water.

[0034] In some optional embodiments, the medium input line 31 and the medium output line 32 are connected by a bypass line 33, and a bypass valve 331 is provided on the bypass line 33. When the flue gas in the flue 2 has no heat for the first heat exchange medium to exchange heat, the bypass valve 331 can be opened so that the first heat exchange medium does not pass through the first heat exchanger 3 and is directly transported to the deaerator 4.

[0035] In some optional embodiments, the medium input line 31 is provided with a switch valve 311 at a position close to the first heat exchanger 3. By providing the switch valve 311 at a position close to the first heat exchanger 3 on the medium input line 31, when there is no heat for the first heat exchange medium to exchange heat, the switch valve 311 can be closed so that the first heat exchange medium does not pass through the first heat exchanger 3; when the first heat exchange medium needs to exchange heat with the flue gas of the flue 2 through the first heat exchanger 3, the switch valve 311 is opened and the bypass valve 331 is closed.

[0036] The working principle of the desalted water deoxygenation system for an oxidation furnace proposed in the utility model is as follows: the exhaust gas of the oxidation furnace 1 is guided by the induced draft fan 8 to the first heat exchanger 3 through the flue 2, and the first heat exchange medium circulating in the first heat exchanger 3 exchanges heat with the exhaust gas from the oxidation furnace 1, and the first heat exchange medium after heat exchange is transported to the deaerator 4, and the desalted water is heated and deoxygenated in the deaerator 4 by the first heat exchange medium to obtain deoxygenated water, and the heat of the exhaust gas of the oxidation furnace 1 is utilized, which can reduce the heat loss of the oxidation furnace 1, thereby reducing the energy consumption of the oxidation furnace 1; the deoxygenated water in the deaerator 4 is pumped into the steam drum 5 by the water feed pump 7, and the second heat exchange medium in the steam drum 5 enters the second heat exchanger 6 through the heat exchange inlet pipe 51, and then returns to the steam drum 5 through the heat exchange outlet pipe 52, and the second heat exchange medium heats the gas in the flue 2 during the circulation process, so that the flue 2 maintains a certain temperature, thereby reducing heat loss.

[0037] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0041] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An oxidation furnace desalted water deoxygenation system, characterized in that: It includes an oxidation furnace, a flue, a first heat exchanger and a deaerator, wherein: The flue is connected to the oxidation furnace and the first heat exchanger; The first heat exchanger is connected to the deaerator and is located at the outlet side of the tail gas of the oxidation furnace, and is used to exchange heat with the tail gas from the oxidation furnace through the first heat exchange medium flowing through the first heat exchanger, and transport the first heat exchange medium after heat exchange to the deaerator; The deaerator is used to heat and deoxygenate the desalted water by using the first heat exchange medium to obtain deoxygenated water.

2. The oxidation furnace desalted water deoxygenation system according to claim 1, characterized in that: It also includes a steam drum, which is connected to the deaerator and is used to receive deoxygenated water from the deaerator.

3. The oxidation furnace desalted water deoxygenation system according to claim 2, characterized in that: The deaerator is also connected to a steam inlet pipe, and the steam inlet pipe is used to input steam into the deaerator.

4. The oxidation furnace desalted water deoxygenation system according to claim 3, characterized in that: It also includes a second heat exchanger located on a side of the oxidation furnace away from the first heat exchanger. The second heat exchanger is connected to the flue and the steam drum and is used for exchanging heat with the steam drum and heating the gas in the flue with the heat of the heat exchange.

5. The oxidation furnace desalted water deoxygenation system according to claim 4, characterized in that: The second heat exchanger is connected to the steam drum via a heat exchange inlet pipe and a heat exchange outlet pipe so as to heat the gas in the flue through the second heat exchange medium of the steam drum.

6. The oxidation furnace desalted water deoxygenation system according to claim 5, characterized in that: It also includes a feed water pump, which is connected to the deaerator and the steam drum respectively and is used to pump the deoxygenated water in the deaerator into the steam drum.

7. The deionized water deoxygenation system for an oxidation furnace according to claim 6, characterized in that: It also includes an induced draft fan, which is connected to one end of the flue close to the first heat exchanger and is used to guide the flue gas to the first heat exchanger.

8. The oxidation furnace desalted water deoxygenation system according to any one of claims 1 to 7, characterized in that: The first heat exchanger is provided with a medium input line and a medium output line, and the medium output line is connected to the deaerator.

9. The oxidation furnace desalted water deoxygenation system according to claim 8, characterized in that: The medium input line and the medium output line are connected via a bypass line, and a bypass valve is arranged on the bypass line.

10. The deionized water deoxygenation system for an oxidation furnace according to claim 9, characterized in that: The medium input line is provided with an on-off valve at a position close to the first heat exchanger.

Images