Reaction gas cooler

Abstract

The utility model discloses a reaction gas cooler which comprises a vertical cylinder body, a heat exchange tube vertically arranged in the cylinder body, and a jacket sleeved on the outer side of the upper part of the cylinder body, wherein a closed cavity is formed between the inner side periphery of the jacket and the outer side periphery of the cylinder body; a gas inlet is formed in the outer side of the jacket, a reaction gas inlet located in the jacket is formed in the side part of the barrel, a reaction gas outlet is formed in the lower part, and a heat exchange medium inlet and a heat exchange medium outlet are formed in the upper part; the reaction gas cooler further comprises a spiral guide plate which is spirally coiled in the cavity, and the initial end of the spiral guide plate is aligned with the gas inlet; the jacket comprises a conical section at the upper part, the conical section gradually narrows upwards and is annularly connected to the outer side of the barrel through the narrowest part of the conical section, and the tail end of the spiral guide plate is not lower than the conical section. The reaction gas cooler disclosed by the utility model not only can ensure the heat exchange efficiency of reaction gas, but also has higher cleaning efficiency on the jacket.

Description

Technical Field

[0001] The utility model relates to a reaction gas cooler. Background Art

[0002] n-Butane and air undergo an oxidation reaction in a reactor in the presence of a catalyst to produce maleic anhydride. The catalyst in the reactor is recovered through a cyclone separator, and the gas generated by the reaction enters a filter after being cooled by a cooler to remove catalyst particles therein, and then is sent to an absorption tower for the recovery of maleic anhydride. During this process, the gas phase of the cooler will contain catalyst particles and impurities brought from the reactor.

[0003] In the existing reaction gas cooler, the reaction gas flows in a disorderly manner after entering the jacket, resulting in relatively low heat exchange efficiency; and the catalyst particles and impurities in the reaction gas are likely to accumulate in the jacket, resulting in relatively low cleaning efficiency of the jacket. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a reaction gas cooler which can not only ensure the heat exchange efficiency of the reaction gas, but also has a relatively high cleaning efficiency for the jacket.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A reaction gas cooler includes a vertical cylinder body, heat exchange tubes vertically arranged in the cylinder body, and a jacket sleeved on the outer side of the upper part of the cylinder body. A closed cavity is formed between the inner circumferential part of the jacket and the outer circumferential part of the cylinder body; an air inlet is opened on the outer side of the jacket, a reaction gas inlet located in the jacket is opened on the side part of the cylinder body, a reaction gas outlet is opened at the lower part, and a heat exchange medium inlet and a heat exchange medium outlet are opened at the upper part;

[0007] The reaction gas cooler further includes a spiral guide plate spirally arranged in the cavity, and the starting end of the spiral guide plate is aligned with the air inlet;

[0008] The jacket includes a conical section at the upper part, the conical section gradually narrows upward and is annularly connected to the outer side of the cylinder body through its narrowest part, and the end of the spiral guide plate is not lower than the conical section.

[0009] Preferably, the spiral guide plate is coaxially arranged with the cylinder body.

[0010] Preferably, the jacket further includes a straight cylinder section and an annular plate sequentially connected below the conical section from top to bottom, and the air inlet is opened on the straight cylinder section.

[0011] More preferably, the inner diameter of the straight cylinder section is larger than the outer diameter of the cylinder body and slightly larger than the outer diameter of the spiral guide plate.

[0012] More preferably, the annular plate is annularly connected to the outer side of the cylinder body.

[0013] More preferably, the air inlet is opened at the lower part of the straight cylinder section.

[0014] Preferably, the end of the spiral guide plate is not lower than the reaction gas inlet.

[0015] Preferably, the reaction gas inlet is an annular opening coaxially arranged with the cylinder body.

[0016] Preferably, the reaction gas cooler further includes a baffle ring that abuts against the inner circumferential part of the cylinder body and sleeves the outer side of the heat exchange tube, and baffle rods with two ends respectively connected to the baffle ring, and the upper end surface of the baffle rod gradually narrows upward.

[0017] More preferably, the cross section of the baffle rod is circular.

[0018] Due to the application of the above technical solutions, the present utility model has the following advantages compared with the prior art: In the reaction gas cooler of the present utility model, by spirally arranging a spiral guide plate in the jacket and aligning the starting end of the spiral guide plate with the air inlet, the reaction gas can be guided orderly, and in cooperation with the conical section at the upper part of the jacket, the reaction gas can be efficiently introduced into the cylinder body for heat exchange, which can not only ensure the heat exchange efficiency of the reaction gas, but also avoid a large amount of particulate matter in the reaction gas from accumulating in the jacket, and the cleaning efficiency of the jacket is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Att Figure 1 is a schematic structural diagram of a reaction gas cooler according to a specific embodiment of the present utility model;

[0020] Att Figure 2 is a partial enlarged schematic structural diagram of a reaction gas cooler according to a specific embodiment of the present utility model;

[0021] Att Figure 3 is a schematic connection structure diagram of a baffle ring and a baffle rod;

[0022] Att Figure 4 is for Att Figure 3 is a cross-sectional structural diagram along line AA in Att

[0023] Wherein: 1. Cylinder body; 2. Heat exchange tube; 3. Jacket; 31. Conical section; 32. Straight cylinder section; 33. Annular plate; 4. Air inlet; 5. Reaction gas inlet; 6. Reaction gas outlet; 7. Heat exchange medium inlet; 8. Heat exchange medium outlet; 9. Spiral guide plate; 10. Baffle ring; 11. Baffle rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions of the present utility model will be further described below in conjunction with specific embodiments and drawings.

[0025] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0026] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "length", "inside", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present invention.

[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0028] In the embodiments of the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0029] In the embodiments of the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0030] The following disclosure provides many different embodiments or examples for implementing different structures of the embodiments of the present utility model. To simplify the disclosure of the embodiments of the present utility model, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0031] See Figure 1-2 As shown, this embodiment provides a reaction gas cooler, which includes a vertical cylinder body 1, heat exchange tubes 2 vertically arranged in the cylinder body 1, and a jacket 3 sleeved outside the upper part of the cylinder body 1. In this embodiment, the heat exchange tubes 2 are U-shaped tubes. The upper part of the cylinder body 1 is provided with a heat exchange medium inlet 7 and a heat exchange medium outlet 8, which are respectively communicated with the inlet end and the outlet end of the U-shaped tube for introducing and discharging the heat exchange medium. In this embodiment, the heat exchange medium is cooling water.

[0032] Among them, a closed cavity is formed between the inner peripheral part of the jacket 3 and the outer peripheral part of the cylinder body 1. An air inlet 4 for introducing the reaction gas is arranged on the outside of the jacket 3. A reaction gas inlet 5 located in the jacket 3 is arranged on the side of the cylinder body 1, and a reaction gas outlet 6 is arranged at the lower part. After the reaction gas enters the jacket 3 from the air inlet 4, it then enters the cylinder body 1 from the reaction gas inlet 5, exchanges heat and cools with the heat exchange medium in the heat exchange tubes 2, and finally is output from the reaction gas outlet 6 below.

[0033] The above-mentioned reaction gas cooler further includes a spiral guide plate 9 spirally arranged in the cavity. The starting end of the spiral guide plate 9 is aligned with the air inlet 4. Through this setting, the reaction gas can be guided upward in time. In this embodiment, the spiral guide plate 9 is coaxially arranged with the cylinder body 1.

[0034] The jacket 3 includes a conical section 31, a straight cylinder section 32, and an annular plate 33 connected in sequence from top to bottom, where:

[0035] The conical section 31 gradually narrows upward and is annularly connected to the outside of the cylinder body 1 through its narrowest part. The end of the spiral guide plate 9 is not lower than the conical section 31. By guiding the reaction gas orderly through the spiral guide plate 9 and cooperating with the conical section 31 at the upper part of the jacket 3, the reaction gas can be efficiently introduced into the cylinder body 1 for heat exchange, which can not only ensure the heat exchange efficiency of the reaction gas, but also avoid a large amount of particulate matter in the reaction gas from accumulating in the jacket 3, and the cleaning efficiency of the jacket 3 is relatively high;

[0036] The inner diameter of the straight tube section 32 is larger than the outer diameter of the cylinder body 1 and slightly larger than the outer diameter of the spiral guide plate 9. The distance between the inner wall of the straight tube section 32 and the outer edge of the spiral guide plate 9 is less than or equal to 2 mm. The air inlet 4 is opened on the straight tube section 32. In this embodiment, the air inlet 4 is opened at the lower part of the straight tube section 32.

[0037] The inner diameter of the annular plate 33 is the same as the outer diameter of the cylinder body 1. The annular plate 33 is connected to the outside of the cylinder body 1 in a ring shape, and the annular plate 33 is perpendicular to the cylinder body 1. In this way, even if there is a small amount of particulate matter accumulated on the upper surface of the annular plate 33, it is relatively easy to clean.

[0038] The end of the spiral guide plate 9 is not lower than the reaction gas inlet 5, so as to efficiently and orderly introduce the reaction gas into the cylinder body 1. In this embodiment, the reaction gas inlet 5 is an annular opening coaxially arranged with the cylinder body 1. Through this setting, the reaction gas can efficiently enter the cylinder body 1.

[0039] See Figure 3-4 As shown, the above-mentioned reaction gas cooler further includes a baffle ring 10 that abuts against the inner peripheral part of the cylinder body 1 and is sleeved outside the heat exchange tube 2, and baffle rods 11 whose two ends are respectively connected to the baffle ring 10. Among them, the axis line of the baffle ring 10 is parallel to the heat exchange tube 2. The lower end surface of the baffle ring 10 is a horizontal plane to facilitate the installation of the baffle rods 11. The upper end surface of the baffle rod 11 gradually narrows upward, which helps to reduce the accumulation of high-temperature particulate matter and avoid the problem of over-temperature. In this embodiment, the cross-section of the baffle rod 11 is circular, and the baffle rod 11 guides the particulate matter downward through the arc surface at its upper end.

[0040] The working process of this embodiment is specifically described below:

[0041] The high-temperature reaction gas is introduced into the jacket 3 through the air inlet 4. The reaction gas spirally rises under the guidance of the spiral guide plate 9 and enters the cylinder body 1 through the reaction gas inlet 5 with the cooperation of the conical section 31. At the same time, cooling water is introduced into the heat exchange tube 2. The reaction gas in the cylinder body 1 flows downward while exchanging heat and cooling with the cooling water, and finally is output from the reaction gas outlet 6 below the cylinder body 1.

[0042] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A reaction gas cooler, characterized in that: It includes a vertical cylinder body, heat exchange tubes vertically arranged in the cylinder body, and a jacket sleeved on the outer side of the upper part of the cylinder body. A closed cavity is formed between the inner peripheral part of the jacket and the outer peripheral part of the cylinder body; an air inlet is arranged on the outer side of the jacket, a reaction gas inlet located inside the jacket is arranged on the side part of the cylinder body, a reaction gas outlet is arranged at the lower part, and a heat exchange medium inlet and a heat exchange medium outlet are arranged at the upper part; The reaction gas cooler further includes a spiral guide plate spirally arranged in the cavity, and the starting end of the spiral guide plate is aligned with the air inlet; The jacket includes a conical section at the upper part, the conical section gradually narrows upward and is circumferentially connected to the outer side of the cylinder body through its narrowest part, and the end of the spiral guide plate is not lower than the conical section.

2. The reaction gas cooler according to claim 1, wherein: The spiral guide plate is coaxially arranged with the cylinder body.

3. The reaction gas cooler according to claim 1, wherein: The jacket further includes a straight cylinder section and an annular plate sequentially connected below the conical section from top to bottom, and the air inlet is arranged on the straight cylinder section.

4. The reaction gas cooler according to claim 3, characterized in that: The inner diameter of the straight cylinder section is larger than the outer diameter of the cylinder body and slightly larger than the outer diameter of the spiral guide plate.

5. The reaction gas cooler according to claim 3, characterized in that: The annular plate is circumferentially connected to the outer side of the cylinder body.

6. The reaction gas cooler according to claim 3, characterized in that: The air inlet is arranged at the lower part of the straight cylinder section.

7. The reaction gas cooler according to claim 1, characterized in that: The end of the spiral guide plate is not lower than the reaction gas inlet.

8. The reaction gas cooler according to claim 1, wherein: The reaction gas inlet is an annular opening coaxially arranged with the cylinder body.

9. The reaction gas cooler according to claim 1, wherein: The reaction gas cooler further includes a baffle ring that abuts against the inner peripheral part of the cylinder body and is sleeved on the outer side of the heat exchange tube, and baffle rods with two ends respectively connected to the baffle ring. The upper end surface of the baffle rod gradually narrows upward.

10. The reaction gas cooler according to claim 9, characterized in that: The cross section of the baffle rod is circular.

Images