Variable-pressure operation low-temperature corrosion prevention self-deoxidizing device
By designing a self-deoxygenation device for low-temperature corrosion and using reverse flow and light pipe structure, the low-temperature corrosion problem of the glass kiln waste heat boiler tail is solved, the deoxygenation efficiency and waste heat utilization rate is improved, the smoke exhaust temperature is reduced, and the boiler is extended The service life and reduces environmental pollution.
Patent Information
- Application Number
- CN202420635768.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-03-29
AI Technical Summary
The heating surface of the tail of the glass kiln waste heat boiler is susceptible to low-temperature corrosion, resulting in a shortened service life and frequent shutdown of furnaces and maintenance. The existing technology is difficult to effectively prevent low-temperature corrosion and reduce smoke exhaust temperature.
Design a transformer operation anti-low temperature corrosion automatic deoxygenation device, including deoxygenation water tank, deoxygenation head, deoxygenation evaporator one and two, imported container, outlet container, ash bucket and outlet flue, adopting a light pipe structure and soot blower, the flue gas flows against the medium, improves heat exchange efficiency and reduces the smoke exhaust temperature.
It has achieved improved deoxygenation efficiency, prevented low-temperature corrosion, reduced boiler smoke exhaust temperature, extended the service life of the heated surface, saved energy and reduced environmental pollution.
Smart Images
Figure CN222186919U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a device, in particular to a voltage-variable operation low-temperature corrosion-resistant self-deoxidation device, which belongs to the field of glass kiln waste heat boilers. Background Art
[0002] During the production process of glass melting furnace, a large amount of high-temperature exhaust gas is generated. The supporting waste heat boiler is used to absorb the heat in the high-temperature exhaust gas to generate steam and generate electricity. Due to the high sulfide content in the tail gas of the glass furnace, the tail hot surface of the waste heat boiler of the glass furnace is threatened by low-temperature corrosion. In order to effectively prevent low-temperature corrosion, the wall temperature of the tube wall of the tail heating surface of the waste heat boiler should be higher than the corresponding acid dew point temperature to avoid acid corrosion, extend the service life of the heating surface, reduce the number of shutdowns for maintenance and material replacement, and ensure the normal operation of the waste heat boiler. Since the feed water entering the deaerator evaporator of the tail heating surface is provided by the deaerator, the operating pressure of the deaerator is increased to obtain a saturation temperature higher than the acid dew point, so that the temperature entering the deaerator evaporator is higher than the acid dew point, avoiding low-temperature corrosion of the tube.
[0003] Therefore, installing a variable pressure operation anti-low temperature corrosion self-deaeration device can not only increase the feed water temperature entering the deaeration evaporator and improve efficiency, but also prevent low temperature corrosion of the final stage deaeration evaporator and reduce the exhaust temperature of the boiler, which can be said to kill two birds with one stone. Utility Model Content
[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a low-temperature corrosion-resistant self-deoxidation device with a simple and reasonable structural design, safety and reliability, environmental protection and energy saving, which can reduce the exhaust temperature of the waste heat boiler and improve the utilization rate of the waste heat of the boiler.
[0005] The technical solution adopted by the utility model to solve the above-mentioned problem is: the variable pressure operation anti-low temperature corrosion self-deoxygenation device includes a deoxygenation water tank, a deoxygenation head, a deoxygenation evaporator 1 and a deoxygenation evaporator 2, the other end of the deoxygenation head is connected to the deoxygenation water tank, and is characterized in that it also includes an inlet header, an outlet header, an ash hopper and an outlet flue, an inlet header is arranged at one port of the deoxygenation evaporator 1, an outlet header is arranged at the other port of the deoxygenation evaporator 1, and an ash hopper is arranged at the bottom of the outlet flue.
[0006] Preferably, the utility model further comprises an ash discharge valve, which is arranged at the bottom of the ash hopper; the dust collected in the ash hopper is cleaned regularly by means of the manual ash discharge valve.
[0007] Preferably, the deoxygenation evaporator 1 and the deoxygenation evaporator 2 of the utility model are arranged in a vertical direction in the flue.
[0008] Preferably, the serpentine tubes of the deoxygenation evaporator 1 and the deoxygenation evaporator 2 of the utility model are both light tubes; dust in the flue gas is not easily adsorbed on the surface of the light tube, and the accumulated dust can be easily removed by a soot blower, thereby improving the heat transfer coefficient of the tube.
[0009] Preferably, the outlet header of the utility model is used to output heated saturated water.
[0010] Compared with the prior art, the utility model has the following advantages and effects: 1) The overall structural design is simple and reasonable. It is an independent device and can be separated separately by a regulating valve, which is convenient for maintenance and replacement; 2) The flue gas and the medium in the tube flow in the reverse direction, which increases the heat exchange temperature difference and improves the heat absorption of the medium; 3) The serpentine tube of the deaerator evaporator adopts a light tube, and the dust in the flue gas is not easily adsorbed on the surface of the light tube, and the accumulated dust can be easily removed by a soot blower, thereby improving the heat transfer coefficient of the tube; 4) It is assembled in modules in the factory, which is convenient for transportation, and assembled into a module group on site, which is convenient and fast; 5) By arranging the deaerator and the deaerator evaporator tube group at the tail of the boiler, the boiler exhaust temperature can be reduced, energy can be saved, and the harm of high-temperature flue gas to the atmospheric environment can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.
[0012] In the figure: deaeration water tank 1, deaeration head 2, deaeration evaporator 1 3, deaeration evaporator 2 4, inlet header 5, outlet header 6, ash hopper 7, ash discharge valve 8, outlet flue 9. DETAILED DESCRIPTION
[0013] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.
[0014] Example
[0015] See also Figure 1 The variable pressure operation anti-low temperature corrosion self-deoxygenation device of this embodiment includes a deoxygenation water tank 1, a deoxygenation head 2, a deoxygenation evaporator 1 3, a deoxygenation evaporator 2 4, an inlet header 5, an outlet header 6, an ash hopper 7 and an outlet flue 9. The deoxygenation evaporator 1 3 and the deoxygenation evaporator 2 4 are arranged in the vertical direction of the flue. The inlet header 5 is arranged at one end of the deoxygenation evaporator 1 3, and the outlet header 6 is arranged at the other end to output the heated saturated water. An ash hopper 7 is arranged at the bottom of the outlet flue 9; the other end of the deoxygenation head 2 is connected to the deoxygenation water tank 1.
[0016] The ash discharge valve 8 in this embodiment is arranged at the bottom of the ash hopper 7; the dust collected in the ash hopper 7 is cleaned up regularly through the manual ash discharge valve 8.
[0017] The deoxygenation evaporator 3 and the deoxygenation evaporator 4 in this embodiment use light tubes; dust in the flue gas is not easily adsorbed on the surface of the light tubes, and the accumulated dust can be easily removed by a soot blower, thereby improving the heat transfer coefficient of the tubes.
[0018] The flue gas flow when this embodiment is used is as follows: the flue gas from the glass kiln comes from the heating surface in front of the waste heat boiler, enters the two deaeration evaporators at the last stage, flushes the deaeration evaporator serpentine pipes in the vertical direction, and after the flue gas temperature is reduced, it is led out through the outlet flue, enters the exhaust gas purification device, and is discharged into the atmosphere.
[0019] The soda flow process when this embodiment is used is as follows: water from the water supply station enters the deaeration water tank, is deoxygenated by the deaeration head, and then returns to the deaeration water tank downcomer, and enters the two-stage deaeration evaporator. Relative to the flue gas flow direction, the medium in the deaeration evaporator serpentine tube flows in the reverse direction, and the deoxygenated water is heated and then drawn out from the outlet header 6 and enters the next process; the dust settled in the flue gas flowing through the outlet flue is collected in the bottom ash hopper 7, and the dust collected in the ash hopper 7 is cleaned regularly through the manual ash discharge valve 8.
[0020] This embodiment sets a variable pressure operation low temperature corrosion protection self-deoxygenation device at the tail of the boiler to absorb the heat in the flue gas, heat the deoxygenated water, reduce the exhaust gas temperature, and improve the waste heat utilization rate of the boiler.
[0021] Through the above description, those skilled in the art can already implement it.
[0022] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the utility model. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the utility model are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.
Claims
1. A variable pressure operation low temperature corrosion protection self-deoxygenation device, comprising a deoxygenation water tank (1), a deoxygenation head (2), a first deoxygenation evaporator (3) and a second deoxygenation evaporator (4), wherein the other end of the deoxygenation head (2) is connected to the deoxygenation water tank (1), and characterized in that: It also comprises an inlet header (5), an outlet header (6), an ash hopper (7) and an outlet flue (9), wherein one port of the deoxygenating evaporator (3) is provided with the inlet header (5), the other port of the deoxygenating evaporator (3) is provided with the outlet header (6), and the bottom of the outlet flue (9) is provided with an ash hopper (7).
2. The voltage-variable operation low-temperature corrosion-resistant self-deoxidation device according to claim 1 is characterized in that: It also comprises an ash discharge valve (8), wherein the ash discharge valve (8) is arranged at the bottom of the ash hopper (7).
3. The voltage-variable operation low-temperature corrosion-resistant self-deoxidation device according to claim 1 is characterized in that: The deoxygenation evaporator 1 (3) and the deoxygenation evaporator 2 (4) are arranged in a vertical direction in the flue.
4. The voltage-variable operation low-temperature corrosion-resistant self-deoxygenation device according to claim 1 or 3, characterized in that: The serpentine tubes of the deoxygenation evaporator 1 (3) and the deoxygenation evaporator 2 (4) are both smooth tubes.
5. The voltage-variable operation low-temperature corrosion-resistant self-deoxidation device according to claim 1 is characterized in that: The outlet header (6) is used to output heated saturated water.