Novel corrosion-resistant high-temperature flue gas jacket cooler

Abstract

The utility model relates to a novel corrosion-resistant high-temperature flue gas jacket cooler which comprises a support, a first gas distribution chamber, a second gas distribution chamber, a jacket heat exchange tube, a flue gas inlet, a flue gas outlet, a primary air inlet, a primary air outlet and two first ash discharging ports. The two ends of the jacket heat exchange pipe are arranged at the top of the first gas distribution chamber and the top of the second gas distribution chamber respectively, the smoke inlet is formed in one side of the first gas distribution chamber, the smoke outlet is formed in one side of the second gas distribution chamber, the primary air inlet is formed in the side, close to the top of the first gas distribution chamber, of the jacket heat exchange pipe, and the secondary air inlet is formed in the side, close to the top of the second gas distribution chamber, of the jacket heat exchange pipe. The primary air outlet is formed in the side, close to the primary air inlet, of the middle section of the jacket heat exchange pipe. Through mutual cooperation of the jacket heat exchange pipe, the primary air inlet, the primary air outlet and the ash discharging opening, the device can be cooled safely and stably, and therefore long-term stable operation of the cooling system of the device is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a novel anticorrosion high temperature flue gas jacketed cooler. BACKGROUND

[0002] At present, fine chemical enterprises produce various waste sulfuric acid and waste liquid containing corrosive elements such as sulfur, phosphorus and chlorine in the production process. In order to treat waste sulfuric acid and waste liquid and recover sulfur elements, the waste acid and waste liquid are often directly transported to the incinerator for incineration and cooling to facilitate impurity removal and acid production. If the waste sulfur dioxide flue gas after incineration is cooled by using a waste heat boiler or other equipment, the cooling treatment effect is poor, and the cooler is prone to cracking due to corrosion by sulfur, phosphorus and chlorine elements, which poses a great accident hazard and cannot achieve safe and stable cooling, affecting the long-term stable operation of the device cooling system. Therefore, a novel anticorrosion high temperature flue gas jacketed cooler is urgently needed to solve the above problems. SUMMARY

[0003] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name. Such simplifications or omissions cannot be used to limit the scope of the utility model.

[0004] The technical problem to be solved by the utility model is that the existing heat exchange equipment has poor cooling treatment effect, weak corrosion resistance to sulfur, phosphorus and chlorine elements, cannot cool safely and stably, and is difficult to achieve long-term stable operation of the device cooling system.

[0005] To solve the above technical problems, the utility model provides the following technical scheme: a novel anticorrosion high temperature flue gas jacketed cooler, comprising a support, a first air distribution chamber, a second air distribution chamber, a jacketed heat exchange pipe, a flue gas inlet, a flue gas outlet, a primary air inlet, a primary air outlet and two first ash outlets, the first air distribution chamber and the second air distribution chamber are symmetrically arranged on the support, the jacketed heat exchange pipe is composed of an inner pipe and an outer pipe, the jacketed heat exchange pipe has an "M" type structure, the two ends of the jacketed heat exchange pipe are arranged at the top of the first air distribution chamber and the second air distribution chamber respectively for cooling high temperature corrosive flue gas, the flue gas inlet is arranged on one side of the first air distribution chamber, the flue gas outlet is arranged on one side of the second air distribution chamber, the primary air inlet is arranged on one side of the jacketed heat exchange pipe close to the top of the first air distribution chamber for air inlet, the primary air outlet is arranged on one side of the middle section of the jacketed heat exchange pipe close to the primary air inlet for air outlet, and the two first ash outlets are arranged at the bottom of the first air distribution chamber and the second air distribution chamber respectively for ash removal of the jacketed heat exchange pipe.

[0006] As a preferred scheme of the novel anti-corrosion high-temperature flue gas jacketed cooler, the second ash outlet is arranged at the bottom of the middle section of the jacketed heat exchange pipe, so that the ash in the jacketed heat exchange pipe can be cleaned better.

[0007] As a preferred scheme of the novel anti-corrosion high-temperature flue gas jacketed cooler, the secondary air inlet is arranged on one side of the jacketed heat exchange pipe close to the top of the second air distribution chamber, and the secondary air outlet is arranged on one side of the middle section of the jacketed heat exchange pipe close to the secondary air inlet, so that the temperature of the flue gas outlet can be adjusted.

[0008] As a preferred scheme of the novel anti-corrosion high-temperature flue gas jacketed cooler, the top of the first air distribution chamber and the second air distribution chamber is provided with a reinforcing rib to increase the structural strength of the whole cooler.

[0009] As a preferred scheme of the novel anti-corrosion high-temperature flue gas jacketed cooler, the first ash outlet and the second ash outlet are both detachable structures, and quick-opening manholes are arranged on the first ash outlet and the second ash outlet, so that the effect of online ash cleaning can be realized.

[0010] As a preferred scheme of the novel anti-corrosion high-temperature flue gas jacketed cooler, the material of the inner tube of the jacketed heat exchange pipe is silicon carbide, and the material of the outer tube is 310H stainless steel, so that the overall high-temperature resistance and corrosion resistance of the jacketed heat exchange pipe are improved.

[0011] As a preferred scheme of the novel anti-corrosion high-temperature flue gas jacketed cooler, the material of the inner tube of the jacketed heat exchange pipe is silicon carbide, and the material of the outer tube is 310H stainless steel, so that the overall high-temperature resistance and corrosion resistance of the jacketed heat exchange pipe are improved.

[0012] Beneficial effects: through the cooperation between the jacketed heat exchange pipe, the primary air inlet, the primary air outlet and the ash outlet, the cooling treatment effect of the heat exchange equipment and the corrosion resistance to elements such as sulfur, phosphorus and chlorine are improved, so that the device cooling system can run stably for a long time. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor. Among them:

[0014] Figure 1The overall structure diagram of the novel anticorrosion high-temperature flue gas jacketed cooler.

[0015] In the figure: 1, support; 2, first air distribution chamber; 3, second air distribution chamber; 4, jacketed heat exchange pipe; 5, flue gas inlet; 6, flue gas outlet; 7, primary air inlet; 8, primary air outlet; 9, first ash outlet; 10, second ash outlet; 11, secondary air inlet; 12, secondary air outlet; 13, reinforcing rib. DETAILED DESCRIPTION

[0016] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and understandable, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0017] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0018] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent of or mutually exclusive with other embodiments.

[0019] Embodiment 1

[0020] Reference Figure 1 The embodiment provides a novel anticorrosion high-temperature flue gas jacketed cooler, which comprises a support 1, a first air distribution chamber 2, a second air distribution chamber 3, a jacketed heat exchange pipe 4, a flue gas inlet 5, a flue gas outlet 6, a primary air inlet 7, a primary air outlet 8 and two first ash outlets 9, the first air distribution chamber 2 and the second air distribution chamber 3 are symmetrically arranged on the support 1, the jacketed heat exchange pipe 4 is composed of an inner pipe and an outer pipe, the jacketed heat exchange pipe 4 is in an "M" type structure, two ends of the jacketed heat exchange pipe 4 are arranged at the top of the first air distribution chamber 2 and the second air distribution chamber 3 respectively, and the jacketed heat exchange pipe 4 is used for cooling high-temperature corrosive flue gas, the flue gas inlet 5 is arranged on one side of the first air distribution chamber 2, the flue gas outlet 6 is arranged on one side of the second air distribution chamber 3, the primary air inlet 7 is arranged on one side of the jacketed heat exchange pipe 4 close to the top of the first air distribution chamber 2 and is used for air inlet, the primary air outlet 8 is arranged on one side of the middle section of the jacketed heat exchange pipe 4 close to the primary air inlet 7 and is used for air outlet, and the two first ash outlets 9 are arranged at the bottom of the first air distribution chamber 2 and the second air distribution chamber 3 respectively and are used for ash removal of the jacketed heat exchange pipe 4.

[0021] The support 1 is used as the installation base of the cooler, the first air distribution chamber 2 and the second air distribution chamber 3 are symmetrically installed on the support 1, the jacket heat exchange pipe 4 is installed on the top of the first air distribution chamber 2 and the second air distribution chamber 3, the jacket heat exchange pipe 4 is combined by an inner pipe and an outer pipe, an inner cavity is formed between the inner pipe and the outer pipe, and the inner pipe and the outer pipe are made of different materials, so that the cooling treatment effect is improved, the corrosion resistance to elements such as sulfur, phosphorus and chlorine is improved, the safe and stable cooling is realized, the long-term stable operation of the device cooling system is realized, the whole is in an "M" type structure, the "M" type structure is stable, the vertical structure occupies small area, can be compatible with various device scales, and is convenient for installation and maintenance of the jacket heat exchange pipe 4 and the whole equipment, the left end of the jacket heat exchange pipe 4 is an air inlet end and is connected with the inside of the first air distribution chamber 2, the right end of the jacket heat exchange pipe 4 is an air outlet end and is connected with the inside of the second air distribution chamber 3, the flue gas inlet 5 is arranged on the left side of the first air distribution chamber 2, so that the high-temperature flue gas containing corrosive elements such as sulfur, phosphorus and chlorine can enter the first air distribution chamber 2, the flue gas outlet 6 is arranged on the right side of the second air distribution chamber 3, so that the cooled flue gas in the second air distribution chamber 3 can flow out, the primary air inlet 7 is arranged on the left outer wall of the jacket heat exchange pipe 4 close to the top of the first air distribution chamber 2, the primary air inlet 7 is connected with the inner cavity of the jacket heat exchange pipe 4, so that the normal-temperature air can be conveyed into the inner cavity to cool the high-temperature flue gas containing corrosive elements such as sulfur, phosphorus and chlorine flowing in the inner pipe of the jacket heat exchange pipe 4, the primary air outlet 8 is arranged on the outer wall of the jacket heat exchange pipe 4 on the side close to the primary air inlet 7 in the middle section of the jacket heat exchange pipe 4, so that the high-temperature air in the cavity after completing heat exchange can be quickly discharged, so that the cooling treatment effect of the heat exchange equipment is further improved, the first lower ash outlet 9 is arranged at the bottom of the first air distribution chamber 2 and the second air distribution chamber 3, so that the falling ash in the jacket heat exchange pipe 4 can be collected and received, and the ash in the jacket heat exchange pipe 4 can be removed.

[0022] Further, the second lower ash outlet 10 is arranged at the bottom of the middle section of the jacket heat exchange pipe 4.

[0023] In the embodiment, the second lower ash outlet 10 is arranged at the bottom of the middle section of the jacket heat exchange pipe 4, the falling ash in the middle section of the jacket heat exchange pipe 4 is collected and received through the second lower ash outlet 10, the blockage of the middle section of the jacket heat exchange pipe 4 is avoided, and the ash in the jacket heat exchange pipe 4 can be better cleaned.

[0024] Further, the secondary air inlet 11 is arranged on the side of the jacket heat exchange pipe 4 close to the top of the second air distribution chamber 3, and the secondary air outlet 12 is arranged on the side of the jacket heat exchange pipe 4 close to the secondary air inlet 11 in the middle section of the jacket heat exchange pipe 4.

[0025] The embodiment is characterized in that the secondary air inlet 11 is arranged on the right outer wall of the jacket heat exchange pipe 4 close to the top of the second air distribution chamber 3, so as to deliver low-temperature air into the cavity of the jacket heat exchange pipe 4 close to the air outlet end; the secondary air outlet 12 is arranged on the outer wall of the jacket heat exchange pipe 4 close to the secondary air inlet 11 at the middle section, so as to quickly discharge the high-temperature air in the cavity after heat exchange; the temperature of the flue gas outlet 6 can be accurately controlled by adjusting the flow of the secondary air, so as to better process the flue gas.

[0026] Further, the top of the first air distribution chamber 2 and the second air distribution chamber 3 is provided with a reinforcing rib 13.

[0027] The embodiment is characterized in that the top of the first air distribution chamber 2 and the second air distribution chamber 3 is provided with a reinforcing rib 13, so as to increase the structural strength of the entire cooler and ensure long-term stable operation.

[0028] Further, the first ash outlet 9 and the second ash outlet 10 are both detachable structures, and the first ash outlet 9 and the second ash outlet 10 are both provided with quick-opening manholes.

[0029] The first ash outlet 9 and the second ash outlet 10 in the embodiment are both detachable structures, and the first ash outlet 9 and the second ash outlet 10 are both provided with quick-opening manholes (not shown in the figure), so as to realize the effect of online ash removal.

[0030] Further, the material of the inner tube of the jacket heat exchange pipe 4 is silicon carbide, and the material of the outer tube is 310H stainless steel.

[0031] The material of the inner tube of the jacket heat exchange pipe 4 in the embodiment is silicon carbide, and the medium in the inner tube is high-temperature flue gas containing corrosive components such as sulfur, phosphorus and chlorine. Silicon carbide has high strength, high-temperature resistance and corrosion resistance, and can be used in high-temperature flue gas below 1300℃. In the embodiment, the temperature of the high-temperature flue gas before entering the jacket cooling is 1200℃, and the temperature of the flue gas cooled by the normal-temperature air in the outer tube of the jacket is 400℃, which can be processed subsequently. The material of the outer tube is 310H stainless steel. Since the medium in the outer tube is air, 310H stainless steel is suitable for air, and the material is relatively light and thin, with low cost, which is convenient for construction, installation and maintenance, and improves the high-temperature resistance and corrosion resistance of the jacket heat exchange pipe 4.

[0032] In use, the high-temperature flue gas containing corrosive elements such as sulfur, phosphorus, chlorine and the like in the outer pipeline is transported into the first air distribution chamber 2 through the flue gas outlet 6, and then flows upward into the inner pipe of the jacketed heat exchange pipe 4 from the first air distribution chamber 2, at the same time, the normal-temperature air in the outer pipeline is transported into the cavity of the inner pipe and the outer pipe of the jacketed heat exchange pipe 4 through the primary air inlet 7, the high-temperature flue gas is cooled by heat exchange with the normal-temperature air, the high-temperature air after heat exchange can flow out through the primary air outlet 8, so that the normal-temperature air can be transported into the cavity in succession to exchange heat with the high-temperature flue gas, so as to provide the cooling treatment effect of the heat exchange device, the flue gas after cooling flows into the second air distribution chamber 3 from the outlet end of the jacketed heat exchange pipe 4, in this process, the low-temperature air in the outer pipeline enters the cavity through the secondary air inlet 11 to re-cool the flue gas at the outlet end of the jacketed heat exchange pipe 4, the high-temperature air after heat exchange is discharged through the secondary air outlet 12, the temperature of the flue gas outlet 6 can be accurately controlled by adjusting the flow of the secondary air, so as to better process the flue gas subsequently, the flue gas after temperature control flows into the second air distribution chamber 3 and is finally discharged through the flue gas outlet 6 for subsequent processing.

[0033] Example 2

[0034] The cooler structure in the present embodiment is the same as that in example 1, and the difference from example 1 is that the material of the inner pipe of the jacketed heat exchange pipe 4 is different, the material of the inner pipe of the jacketed heat exchange pipe 4 in the present embodiment is silicon nitride, the silicon nitride material has high heat transfer coefficient and strong corrosion resistance at high temperature, and is suitable for high-temperature flue gas not higher than 1900℃, the temperature of the high-temperature flue gas entering the jacketed cooler in the present embodiment is 1500℃, and can be cooled to 500℃ by the normal-temperature air in the cavity of the outer pipe, and the silicon nitride has stronger oxidation resistance and stability at high temperature.

[0035] It should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A novel corrosion resistant high temperature flue gas jacketed cooler characterized in that: The application relates to a high-temperature flue gas cooler, which comprises a support (1), a first air distribution chamber (2), a second air distribution chamber (3), jacket heat exchange pipes (4), a flue gas inlet (5), a flue gas outlet (6), a primary air inlet (7), a primary air outlet (8) and two first ash outlets (9), the first air distribution chamber (2) and the second air distribution chamber (3) are symmetrically arranged on the support (1), the jacket heat exchange pipes (4) are composed of inner pipes and outer pipes, the jacket heat exchange pipes (4) are in an "M" type structure, two ends of the jacket heat exchange pipes (4) are arranged at the top of the first air distribution chamber (2) and the second air distribution chamber (3) respectively, the jacket heat exchange pipes (4) are used for cooling high-temperature corrosive flue gas, the flue gas inlet (5) is arranged on one side of the first air distribution chamber (2), the flue gas outlet (6) is arranged on one side of the second air distribution chamber (3), the primary air inlet (7) is arranged on one side of the jacket heat exchange pipes (4) close to the top of the first air distribution chamber (2) and is used for air inlet, the primary air outlet (8) is arranged on one side of the middle section of the jacket heat exchange pipes (4) close to the primary air inlet (7) and is used for air outlet, the two first ash outlets (9) are arranged at the bottom of the first air distribution chamber (2) and the second air distribution chamber (3) respectively and are used for removing the ash of the jacket heat exchange pipes (4).

2. The novel corrosion resistant high temperature flue gas jacketed cooler as claimed in claim 1 wherein: The middle section of the jacket heat exchange pipes (4) is provided with a second ash outlet (10) at the bottom.

3. The novel corrosion resistant high temperature flue gas jacketed cooler as claimed in claim 1 wherein: The jacket heat exchange pipes (4) are provided with a secondary air inlet (11) on one side close to the top of the second air distribution chamber (3), and the jacket heat exchange pipes (4) are provided with a secondary air outlet (12) on one side of the middle section close to the secondary air inlet (11).

4. The novel corrosion resistant high temperature flue gas jacketed cooler as claimed in claim 1 wherein: The top of the first air distribution chamber (2) and the second air distribution chamber (3) is provided with a reinforcing rib (13).

5. The novel corrosion resistant high temperature flue gas jacketed cooler as claimed in claim 2 wherein: The first ash outlet (9) and the second ash outlet (10) are all detachable structures, and the first ash outlet (9) and the second ash outlet (10) are all provided with quick-opening manholes.

6. The novel corrosion resistant high temperature flue gas jacketed cooler as claimed in claim 1 wherein: The material of the inner pipes of the jacket heat exchange pipes (4) is silicon carbide, and the material of the outer pipes is 310H stainless steel.

7. The novel corrosion resistant high temperature flue gas jacketed cooler as claimed in claim 1 wherein: The material of the inner pipes of the jacket heat exchange pipes (4) is silicon nitride, and the material of the outer pipes is 310H stainless steel.

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