Tubular heat exchanger for denitration

Abstract

The utility model discloses a tubular heat exchanger for denitration, which comprises a main body module and a cleaning module, the main body module comprises a barrel body, partition plates symmetrically fixed in an inner cavity of the barrel body, a plurality of groups of heat exchange pipes which are arranged in an annular array and penetrate through the partition plates, an air inlet pipeline mounted on the barrel body, an air outlet pipeline mounted on the barrel body, a water inlet pipeline mounted on the barrel body, a water outlet pipeline mounted on the barrel body and a filter mounted on the inner wall of the barrel body; the barrel is used for installing other assemblies, the partition plates divide an inner cavity of the barrel into three cavities, namely a heat exchange cavity located between the two partition plates, a water inlet cavity located on one side of the heat exchange cavity and a water outlet cavity located on the other side of the heat exchange cavity, and the air inlet pipeline and the air outlet pipeline are both communicated with the heat exchange cavity and are arranged in a central symmetry mode. The tubular heat exchanger for denitration has the advantages that the heat exchange tubes are not prone to scaling, and the tubular heat exchanger is convenient to clean.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, in particular to a tubular heat exchanger for denitration. Background Art

[0002] There are two main types of flue gas denitrification technologies: dry method (selective catalytic reduction flue gas denitrification, selective non-catalytic reduction denitrification) and wet method. Compared with wet flue gas denitrification technology, the main advantages of dry flue gas denitrification technology are: low basic investment, simple equipment and process, high efficiency of removing NOX, no wastewater and waste treatment, and not easy to cause secondary pollution. When performing flue gas denitrification, a tubular heat exchanger is needed to replace the heat in the flue gas.

[0003] The existing tubular heat exchangers used for flue gas denitrification have the following main drawbacks during use: scale is easily condensed on the inner wall of the heat exchange tube, and the scale adheres to the inner wall of the heat exchange tube, affecting the heat exchange efficiency of the heat exchange tube. At the same time, it is more troublesome to clean. Therefore, there is room for improvement. Utility Model Content

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technology.

[0005] To this end, the technical solution adopted by the utility model is: a tubular heat exchanger for denitrification, comprising: a main module and a cleaning module, the main module comprising a cylinder, a partition symmetrically fixed in the inner cavity of the cylinder, a plurality of groups of heat exchange tubes arranged in a circular array and passing through the partition, an air inlet pipe installed on the cylinder, an air outlet pipe installed on the cylinder, a water inlet pipe installed on the cylinder, a water outlet pipe installed on the cylinder and a filter installed on the inner wall of the cylinder.

[0006] The partition divides the inner cavity of the cylinder into three chambers, namely, a heat exchange chamber located between two partitions, a water inlet chamber located on one side of the heat exchange chamber, and a water outlet chamber located on the other side of the heat exchange chamber.

[0007] The filter is arranged in the water inlet cavity, and comprises a metal mesh frame fixed on the inner wall of the cylinder, a disc fixed on one side of the metal mesh frame, and a connecting pipe connecting the disc and the water inlet pipe. The metal mesh frame is filled with nano anti-scaling metal ceramic pellets.

[0008] The cleaning module includes an electric telescopic rod symmetrically fixed on the outer side of the cylinder, a movable seat fixed at the end of the electric telescopic rod, multiple groups of sealing plugs fixed in a circular array on one side of the movable seat and extending through the cylinder into the heat exchange tube, a support rod fixing one end of the sealing plug, and a scraper fixed at the end of the support rod.

[0009] In a preferred example, the utility model can be further configured as follows: one end of the heat exchange tube is connected to the water inlet cavity, and the other end extends out of the cylinder body, and a circular hole is opened on the outer side of the heat exchange tube located at the water outlet cavity.

[0010] In a preferred example, the utility model can be further configured as follows: the air inlet pipe and the air outlet pipe are both connected to the heat exchange chamber, and the two are centrally symmetrically arranged, and the water outlet pipe is connected to the water outlet chamber.

[0011] In a preferred example, the utility model can be further configured as follows: a plurality of sealing rings are sleeved on the outer side surface of the sealing plug.

[0012] In a preferred example, the utility model can be further configured as follows: the scraper is arranged at one end of the inner cavity of the heat exchange tube away from the sealing plug, including a scraper ring arranged in the heat exchange tube and a bracket fixed on the inner wall of the scraper ring in an annular array.

[0013] In a preferred example, the utility model can be further configured as follows: the outer diameter of the scraper ring is equal to the inner diameter of the heat exchange tube, and the bracket is fixedly connected to the end of the support rod.

[0014] By adopting the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0015] 1. In the utility model, a filter element is fixed on the inner wall of the cylinder, and the filter element is composed of a metal mesh frame, a disc and a connecting pipe. The connecting pipe is connected to the water inlet pipe, and nano-scale anti-scaling metal ceramic pellets are filled in the metal mesh frame. By utilizing the microporous structure and surface charge characteristics of the nano-scale anti-scaling metal ceramic pellets, when the circulating water enters the nano-scale anti-scaling metal ceramic pellet layer, the suspended matter, bacteria, viruses and other tiny particles in the water will be captured by the micropores on the surface of the nano-scale anti-scaling metal ceramic pellets, and then the suspended matter, microorganisms and organic matter in the circulating water are filtered and removed, avoiding their adhesion to the inner wall of the heat exchange tube to form scale, ensuring the cleanliness of the inner wall of the heat exchange tube, and can effectively improve the corrosion resistance of the heat exchange.

[0016] 2. In the utility model, two partitions are symmetrically fixed in the inner cavity of the cylinder to divide the inner cavity of the cylinder into three chambers, electric telescopic rods are symmetrically fixed on the outer surface of the cylinder, and a movable seat is arranged on one side of the cylinder, the movable seat is fixedly connected to the electric telescopic rod, and a plurality of sealing plugs are arranged in a ring array on the movable seat, the sealing plug extends into the heat exchange tube, and a scraper is arranged at the other end of the inner cavity of the heat exchange tube, the scraper and the sealing plug are connected by a support rod. When it is necessary to clean the scale on the inner wall of the heat exchange tube, the electric telescopic rod is started to drive the movable seat to move outward, the movement of the movable seat drives the sealing plug to move, and the movement of the sealing plug drives the scraper to move in the inner cavity of the heat exchange tube through the support rod, so that the scraper scrapes off the scale attached to the inner wall of the heat exchange tube. Through the above arrangement, the scale on the inner wall of the heat exchange tube can be automatically cleaned, and the cleaning efficiency is high, the cleaning effect is good, and the practical performance is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the main module structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the cleaning module structure of the utility model.

[0021] Reference numerals:

[0022] 100, main body module; 110, cylinder; 120, partition; 130, heat exchange tube; 131, round hole; 140, air inlet pipe; 150, air outlet pipe; 160, water inlet pipe; 170, water outlet pipe; 180, filter element; 181, metal mesh frame; 182, disc; 183, connecting pipe;

[0023] 200, cleaning module; 210, electric telescopic rod; 220, movable seat; 230, sealing plug; 231, sealing ring; 240, supporting rod; 250, scraping member; 251, scraping ring; 252, bracket. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0025] Some embodiments of the present invention are described below in conjunction with the accompanying drawings.

[0026] Embodiment 1:

[0027] Combination Figure 1-4 As shown, this embodiment provides a tubular heat exchanger for denitration, including: a main body module 100 and a cleaning module 200.

[0028] Among them, the main module 100 includes a cylinder 110, a partition 120 symmetrically fixed in the inner cavity of the cylinder 110, a plurality of groups of heat exchange tubes 130 arranged in a circular array and passing through the partition 120, an air intake pipe 140 installed on the cylinder 110, an air outlet pipe 150 installed on the cylinder 110, a water inlet pipe 160 installed on the cylinder 110, a water outlet pipe 170 installed on the cylinder 110, and a filter installed on the inner wall of the cylinder 110.

[0029] The cylinder 110 is used to install other components. The partition 120 divides the inner cavity of the cylinder 110 into three chambers, namely, a heat exchange chamber located between two partitions 120, a water inlet chamber located on one side of the heat exchange chamber, and a water outlet chamber located on the other side of the heat exchange chamber. The air inlet pipe 140 and the air outlet pipe 150 are both connected to the heat exchange chamber, and the two are centrally symmetrically arranged for delivering flue gas into and out of the heat exchange chamber.

[0030] The filter element 180 is arranged in the water inlet chamber, including a metal mesh frame 181 fixed on the inner wall of the cylinder 110, a disc 182 fixed on one side of the metal mesh frame 181, and a connecting pipe 183 connecting the disc 182 and the water inlet pipe 160. The metal mesh frame 181 is filled with nano-scale-proof metal ceramic pellets. Through the microporous structure and surface charge characteristics of the nano-scale-proof metal ceramic pellets, when the circulating water enters the nano-scale-proof metal ceramic pellet layer, the suspended matter, bacteria, viruses and other tiny particles in the water will be captured by the micropores on the surface of the nano-scale-proof metal ceramic pellets, and then the suspended matter, microorganisms and organic matter in the circulating water are filtered and removed, avoiding their adhesion to the inner wall of the heat exchange tube 130 to form scale. The connecting pipe 183 connects the water inlet pipe 160 and the disc 182, so that the cold water can enter the disc 182 through the water inlet pipe 160 and the connecting pipe 183, and then enter the metal mesh frame 181 through the disc 182.

[0031] One end of the heat exchange tube 130 is connected to the water inlet chamber, and the other end extends out of the cylinder 110. At the same time, a circular hole 131 is opened on the outer surface of the heat exchange tube 130 located in the water outlet chamber, and the water outlet pipe 170 is connected to the water outlet chamber. When heat exchange is performed, the cleaning module 200 closes one end of the heat exchange tube 130. At this time, the cold water in the cold water chamber enters the heat exchange tube 130, flows in the heat exchange tube 130, and is finally sent to the water outlet chamber through the circular hole 131, and is sent out through the water outlet pipe 170 in the water outlet chamber.

[0032] The cleaning module 200 is used to clean the scale on the inner wall of the heat exchange tube 130, and includes an electric telescopic rod 210 symmetrically fixed on the outer surface of the cylinder 110, a movable seat 220 fixed at the end of the electric telescopic rod 210, a plurality of sealing plugs 230 fixed in a circular array on one side of the movable seat 220 and extending through the cylinder 110 into the heat exchange tube 130, a support rod 240 fixing one end of the sealing plug 230, and a scraper 250 fixed at the end of the support rod 240.

[0033] The electric telescopic rod 210 is used to install the movable seat 220 and drive the movable seat 220 to move. The movable seat 220 is used to install the sealing plug 230 and drive the sealing plug 230 to move.

[0034] The sealing plug 230 extends through the cylinder 110 into the heat exchange tube 130, and closes one end of the heat exchange tube 130 when the heat exchange tube 130 is working, so that the water in the heat exchange tube 130 is sent to the water outlet chamber through the circular hole 131. A plurality of sealing rings 231 are sleeved on the outer surface of the sealing plug 230 to ensure the sealing between the sealing plug 230 and the heat exchange tube 130.

[0035] The scraper 250 is arranged at one end of the inner cavity of the heat exchange tube 130 away from the sealing plug 230, including a scraper ring 251 arranged in the heat exchange tube 130 and a bracket 252 fixed on the inner wall of the scraper ring 251 in a ring array. The outer diameter of the scraper ring 251 is equal to the inner diameter of the heat exchange tube 130, so that the scraper ring 251 can scrape off the scale attached to the inner wall of the heat exchange tube 130 when it moves. The bracket 252 is used to connect the support rod 240 and the scraper ring 251, so that when the support rod 240 moves, it can drive the scraper ring 251 to move synchronously, and at the same time facilitate the cold water in the water inlet cavity to enter through the scraper ring 251 and enter the heat exchange tube 130.

[0036] Working principle and use process of the utility model: When in use, cold water enters the connecting pipe 183 through the water inlet pipe 160, and enters the disc 182 through the connecting pipe 183, and then enters the metal mesh frame 181 from the disc 182. When passing through the metal mesh frame 181, the suspended matter, bacteria, viruses and other tiny particles in the water will be captured by the micropores on the surface of the nano-scale-proof metal ceramic spheres, and then the suspended matter, microorganisms and organic matter in the circulating water are filtered and removed, and then cooled and enters the water inlet cavity, enters the heat exchange tube 130 from the water inlet cavity, enters the water outlet cavity through the heat exchange tube 130, and finally is sent out through the water outlet pipe 170 , forming a cycle. At the same time, the high-temperature flue gas enters the heat exchange cavity through the air inlet pipe 140, and the high-temperature flue gas contacts the heat exchange tube 130, that is, it exchanges heat with the cold water in the heat exchange tube 130. Then the flue gas is sent out through the air outlet pipe 150. When the inner wall of the heat exchange tube 130 needs to be cleaned, the electric telescopic rod 210 is started to drive the movable seat 220 to move outward. The movement of the movable seat 220 drives the sealing plug 230 to move. The movement of the sealing plug 230 drives the scraper 250 to move in the inner cavity of the heat exchange tube 130 through the support rod 240, so that the scraper 250 scrapes off the scale attached to the inner wall of the heat exchange tube 130, thereby completing the cleaning of the inner wall of the heat exchange tube 130.

[0037] Although the embodiments of the present invention 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 purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A tubular heat exchanger for denitration, comprising: A main body module (100) and a cleaning module (200), characterized in that the main body module (100) comprises a cylinder (110), a baffle (120) symmetrically fixed to the inner cavity of the cylinder (110), a plurality of groups of heat exchange tubes (130) arranged in a circular array and passing through the baffle (120), an air inlet pipe (140) installed on the cylinder (110), an air outlet pipe (150) installed on the cylinder (110), a water inlet pipe (160) installed on the cylinder (110), a water outlet pipe (170) installed on the cylinder (110), and a filter element (180) installed on the inner wall of the cylinder (110); The partition (120) divides the inner cavity of the cylinder (110) into three chambers, namely, a heat exchange chamber located between the two partitions (120), a water inlet chamber located on one side of the heat exchange chamber, and a water outlet chamber located on the other side of the heat exchange chamber; The filter element (180) is arranged in the water inlet cavity, and comprises a metal mesh frame (181) fixed on the inner wall of the cylinder (110), a disc (182) fixed on one side of the metal mesh frame (181), and a connecting pipe (183) connecting the disc (182) and the water inlet pipe (160); the metal mesh frame (181) is filled with nano anti-scaling metal ceramic spheres; The cleaning module (200) comprises an electric telescopic rod (210) symmetrically fixed on the outer surface of the cylinder (110), a movable seat (220) fixed at the end of the electric telescopic rod (210), a plurality of sealing plugs (230) fixed in a ring array on one side of the movable seat (220) and extending through the cylinder (110) into the heat exchange tube (130), a support rod (240) fixed at one end of the sealing plug (230), and a scraper (250) fixed at the end of the support rod (240).

2. A tubular heat exchanger for denitration according to claim 1, characterized in that: One end of the heat exchange tube (130) is in communication with the water inlet chamber, and the other end extends out of the cylinder (110). A circular hole (131) is formed on the outer surface of the heat exchange tube (130) located at the water outlet chamber.

3. The tubular heat exchanger for denitration according to claim 1, characterized in that: The air inlet pipe (140) and the air outlet pipe (150) are both in communication with the heat exchange chamber, and the two are centrally symmetrically arranged, and the water outlet pipe (170) is in communication with the water outlet chamber.

4. The tubular heat exchanger for denitration according to claim 1, characterized in that: The outer side surface of the sealing plug (230) is provided with a plurality of sealing rings (231) sleeved on the joint.

5. The tubular heat exchanger for denitration according to claim 1, characterized in that: The scraper (250) is arranged at one end of the inner cavity of the heat exchange tube (130) away from the sealing plug (230), and comprises a scraper ring (251) arranged in the heat exchange tube (130) and a bracket (252) fixed on the inner wall of the scraper ring (251) in an annular array.

6. A tubular heat exchanger for denitration according to claim 5, characterized in that: The outer diameter of the scraper ring (251) is equal to the inner diameter of the heat exchange tube (130), and the bracket (252) is fixedly connected to the end of the support rod (240).

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