Moving bed type flue gas adsorption and purification equipment

Abstract

The invention discloses moving bed type flue gas adsorption and purification equipment, the moving bed type flue gas adsorption and purification equipment comprises a tower body, a gas inlet assembly and a material distribution assembly, the tower body is internally provided with a cavity, the tower body is provided with a feed port, a discharge port, a flue gas inlet and a flue gas outlet, the gas inlet assembly comprises a first support plate, a second support plate and a plurality of adsorption cylinders, the first supporting plate and the second supporting plate divide the cavity into an adsorption section, an air inlet section and a material falling section, a plurality of vent holes are formed in the peripheral wall of the adsorption barrel, and the material distribution assembly is arranged above the adsorbent bed layer, so that an adsorbent falls through the material distribution assembly to level the top of the adsorbent bed layer. Therefore, through the arrangement of the material distribution assembly, the discharged material of the adsorbent is uniformly distributed, so that the top of the adsorbent bed layer is flat, the invalid filling amount of the adsorbent is reduced, and the utilization rate of the adsorbent is improved. Moreover, the flue gas uniformly flows into the adsorption cavity through the plurality of adsorption cylinders, so that the distribution uniformity of the flue gas is improved, and the purification effect of the flue gas is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas purification, and in particular to a moving bed type flue gas adsorption purification device. Background Art

[0002] Boiler coal-fired flue gas produces a large amount of pollutants (sulfur dioxide, nitrogen oxides, etc.), which is one of the important factors that endanger the atmospheric environment and human health. In the field of flue gas purification technology, fixed bed adsorption towers are usually used to remove pollutants in flue gas. However, fixed bed adsorption towers have uneven pressure and density of the packing layer during engineering applications, resulting in poor adsorption effect and reduced adsorption capacity with prolonged use. Moreover, after the adsorbent is saturated, the equipment needs to be stopped when the adsorbent is replaced, which seriously affects the flue gas purification efficiency. Related technologies use moving bed adsorption towers, and use adsorbents to flow in the adsorption tower to overcome the problem that the adsorption capacity of fixed bed adsorption towers decreases with prolonged use. However, moving bed adsorption towers still have problems such as uneven flue gas distribution and unsatisfactory purification effects. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a moving bed type flue gas adsorption purification device, which has the characteristics of uniform distribution of adsorbent and flue gas and good purification effect.

[0005] The moving bed type flue gas adsorption purification equipment of the embodiment of the present invention comprises: a tower body, an air intake assembly and a cloth assembly, the tower body having a cavity, the tower body being provided with a feed port, a discharge port, a smoke inlet and a smoke outlet connected with the cavity, the air intake assembly comprising a first support plate, a second support plate and a plurality of adsorption cylinders arranged between the first support plate and the second support plate, the first support plate and the second support plate dividing the cavity into an adsorption section, an air intake section and a blanking section which are spaced apart from each other in a direction from top to bottom, so that the adsorbent flows through the feed port, the adsorption section, the adsorption cylinder, the blanking section and the discharge port in sequence and forms an adsorbent bed layer in the cavity, a plurality of air vents are arranged on the peripheral wall of the adsorption cylinder, so that the smoke flows through the smoke inlet, the air intake section, the air vents, the adsorption cylinder, the adsorption section and the smoke outlet in sequence and is adsorbed and purified by the adsorbent bed layer, and the cloth assembly is arranged above the adsorbent bed layer so that the adsorbent falls through the cloth assembly to level the top of the adsorbent bed layer.

[0006] The mobile bed type flue gas adsorption purification equipment of the embodiment of the present invention is provided with a cloth assembly to evenly distribute the adsorbent, thereby making the top of the adsorbent bed flat, reducing the amount of ineffective adsorbent filling, and improving the utilization rate of the adsorbent. In addition, the flue gas flows evenly into the adsorption chamber through multiple adsorption cylinders, improving the uniformity of the flue gas distribution, thereby improving the purification effect of the flue gas.

[0007] In some embodiments, the feed port is located at the top of the tower body, there are multiple feed ports, and the multiple feed ports are spaced apart around the central axis of the tower body, and the discharge port is located at the bottom of the tower body.

[0008] In some embodiments, the cloth assembly includes a motor, a drive plate, a connecting rod and a screen plate, the drive plate is circular, the output shaft of the motor is connected to the drive plate, the central axis of the drive plate is coaxial with the central axis of the output shaft of the motor, the first end of the connecting rod is rotatably connected to the drive plate, the second end of the connecting rod is rotatably connected to the screen plate, the screen plate is movably arranged above the adsorbent bed along the axial direction of the tower body, and a plurality of screen holes are provided on the screen plate.

[0009] In some embodiments, the ratio of the diameter of the sieve hole to the diameter of the adsorbent particle is (3-8):1.

[0010] In some embodiments, the cloth assembly also includes a cloth plate and a plurality of cloth tubes arranged on the cloth plate, the cloth plate is located above the screen plate, an avoidance hole is provided at the center of the cloth plate, the connecting rod passes through the avoidance hole, and the cloth plate is provided with cloth holes that correspond one-to-one to and are connected to the plurality of cloth tubes.

[0011] In some embodiments, the ratio of the diameter of the distribution cylinder to the diameter of the feed port is 1:(2-5).

[0012] In some embodiments, the ratio of the diameter of the distribution cylinder to the diameter of the sieve hole is (1.5-4):1.

[0013] In some embodiments, the smoke inlet is located between the first support plate and the second support plate, and the smoke outlet is located between the screen plate and the distribution plate.

[0014] In some embodiments, the cross-sectional area of ​​the blanking section gradually decreases from top to bottom.

[0015] In some embodiments, the adsorption cylinder is arranged in a vertical direction, and the vent hole extends in a horizontal direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of a moving bed type flue gas adsorption purification device according to an embodiment of the present invention.

[0017] Figure 2 It is a comparative schematic diagram of the moving bed type flue gas adsorption purification equipment after the screen plate is removed according to an embodiment of the present invention.

[0018] Reference numerals:

[0019] Tower body 1, feed port 101, discharge port 102, smoke inlet 103, smoke outlet 104,

[0020] Adsorption section 11, air intake section 12, blanking section 13,

[0021] The first support plate 21, the second support plate 22, the adsorption cylinder 23,

[0022] Motor 31 , driving plate 32 , connecting rod 33 , screening plate 34 , material distribution plate 35 , material distribution cylinder 36 . DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0024] The moving bed type flue gas adsorption purification equipment according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

[0025] like Figure 1 As shown, the moving bed type flue gas adsorption purification equipment of the embodiment of the present invention comprises: a tower body 1, an air intake assembly and a cloth assembly.

[0026] The tower body 1 is an oblong vertical container with a cavity inside. The tower body 1 is provided with a feed port 101, a discharge port 102, a smoke inlet 103 and a smoke outlet 104 connected to the cavity. The coal-fired flue gas of the boiler is input into the tower body 1 through the smoke inlet 103 and discharged from the tower body 1 through the smoke outlet 104. The adsorbent is fed into the tower body 1 through the feed port 101 and discharged from the tower body 1 through the discharge port 102. It is well known to those skilled in the art that the moving bed adsorption tower is connected to the regeneration tower so that the adsorbent after adsorption saturation is fed into the regeneration tower for desorption and regeneration. That is, the feed port 101 of the tower body 1 is connected to the outlet of the regeneration tower (not shown in the figure), and the discharge port 102 of the tower body 1 is connected to the inlet of the regeneration tower.

[0027] The air intake assembly includes a first support plate 21, a second support plate 22 and a plurality of adsorption cylinders 23. The first support plate 21 and the second support plate 22 are both circular plates, the outer peripheral wall of the first support plate 21 is closely connected to the inner peripheral wall of the tower body 1, the outer peripheral wall of the second support plate 22 is closely connected to the inner peripheral wall of the tower body 1, and the first support plate 21 is located above the second support plate 22. The first support plate 21 and the second support plate 22 divide the cavity of the tower body 1 into an adsorption section 11, an air intake section 12 and a blanking section 13 which are spaced from top to bottom, that is, the adsorption section 11 is located above the first support plate 21, the air intake section 12 is located between the first support plate 21 and the second support plate 22, and the blanking section 13 is located below the second support plate 22, so that the adsorbent flows through the feed port 101, the adsorption section 11, the adsorption cylinder 23, the blanking section 13 and the discharge port 102 in sequence, thereby forming a moving adsorbent bed in the cavity.

[0028] The adsorption cylinder 23 is arranged in the up-down direction, and multiple adsorption cylinders 23 are evenly distributed between the first support plate 21 and the second support plate 22 in the horizontal direction. The upper end of the adsorption cylinder 23 is connected to the first support plate 21, and the lower end of the adsorption cylinder 23 is connected to the second support plate 22. The first support plate 21 and the second support plate 22 are both provided with holes corresponding to and connected to the multiple adsorption cylinders 23. A plurality of vents are provided on the peripheral wall of the adsorption cylinder 23, so that the flue gas flows through the smoke inlet 103, the air inlet section 12, the vents, the adsorption cylinder 23, the adsorption section 11 and the smoke outlet 104 in sequence, so that the flue gas contacts the adsorbent bed in countercurrent, and the flue gas is adsorbed and purified into clean flue gas by the adsorbent bed.

[0029] It is understandable that the adsorbent falls into the adsorption section 11 through the feed port 101 of the tower body 1, the adsorbent in the adsorption section 11 flows into the material drop section 13 through the adsorption cylinder 23, and the adsorbent in the material drop section 13 is discharged through the discharge port 102 of the tower body 1. The flue gas (the flue gas temperature is minus 40°C to minus 10°C) enters the air intake section 12 through the smoke inlet 103, and the flue gas in the air intake section 12 enters the adsorption cylinder 23 through the vent hole, flows upward to the adsorption section 11, and contacts with the adsorbent in the adsorption cylinder 23 and the adsorption section 11 in countercurrent, removes pollutants in the flue gas, and the clean flue gas is discharged through the smoke outlet 104 and transported to the subsequent process (chimney discharge).

[0030] The cloth assembly is disposed above the adsorbent bed so that the adsorbent falls through the cloth assembly to level the top of the adsorbent bed. Figure 2 As shown, if the cloth assembly is not provided, there will be a conical pile of materials of different heights on the top of the adsorbent bed, which is an ineffective filling amount of the adsorbent, causing the flue gas to flow out from the gaps in the conical pile, thereby causing part of the adsorbent to be ineffectively utilized.

[0031] Therefore, the mobile bed type flue gas adsorption purification equipment of the embodiment of the present invention, by setting the cloth assembly to evenly distribute the adsorbent, makes the top of the adsorbent bed flat, reduces the ineffective filling amount of the adsorbent, and improves the utilization rate of the adsorbent. In addition, the flue gas flows evenly into the adsorption chamber through the multiple adsorption cylinders 23, improves the uniformity of the flue gas distribution, and further improves the purification effect of the flue gas.

[0032] In some embodiments, Figure 1 As shown, the feed inlet 101 is located at the top of the tower body 1 , and there are multiple feed inlets 101 , which are distributed at intervals around the central axis of the tower body 1 .

[0033] It can be understood that by arranging a plurality of feed ports 101 at even intervals in the circumferential direction of the tower body 1 , the uniformity of material feeding is improved.

[0034] In some embodiments, Figure 1 As shown, the discharge port 102 is located at the bottom of the tower body 1, and the cross-sectional area of ​​the discharge section 13 gradually decreases from top to bottom.

[0035] It is understandable that the adsorbent dropped into the blanking cavity through the adsorption cylinder 23 slides down along the inclined cavity wall of the blanking section 13 to the discharge port 102. That is, the blanking section 13 is in an inverted cone shape, so that the adsorbent is collected to the discharge port 102.

[0036] In some embodiments, Figure 1 As shown, the material distribution assembly includes a motor 31 , a driving plate 32 , a connecting rod 33 and a screening plate 34 .

[0037] The driving plate 32 is circular, the output shaft of the motor 31 is connected to the driving plate 32, and the central axis of the driving plate 32 is coaxial with the central axis of the output shaft of the motor 31. Figure 1 The upper end of the connecting rod 33 is rotatably connected to the driving plate 32 through a rotating shaft, and the second end of the connecting rod 33 (such as Figure 1 The lower end of the middle connecting rod 33 is rotatably connected to the screen plate 34. The screen plate 34 is movably arranged above the adsorbent bed along the axial direction of the tower body 1, and a plurality of screen holes are arranged on the screen plate 34.

[0038] It can be understood that the motor 31 drives the connecting rod 33 to deflect and move up and down, thereby driving the screen plate 34 to move up and down to play the role of screening, so that the adsorbent on the screen plate 34 can evenly pass through the multiple screen holes on the screen plate 34 by jumping up and down, thereby playing the role of uniform distribution, so as to reduce the ineffective filling amount of the adsorbent.

[0039] Specifically, Figure 1As shown, a protruding mounting portion is provided on the top of the tower body 1, and a motor 31 is mounted in the mounting portion through a bracket. The axial direction of the output shaft of the motor 31 is perpendicular to the axial direction of the tower body 1. The connection between the upper end of the connecting rod 33 and the driving plate 32 is adjacent to the outer peripheral wall of the driving plate 32, and the lower end of the connecting rod 33 is connected to the upper wall of the screening plate 34 by a hinged manner. The screening plate 34 is circular, and the outer peripheral wall of the screening plate 34 is slidably in contact with the inner peripheral wall of the tower body 1 in the up and down direction.

[0040] Optionally, the ratio of the diameter of the sieve hole to the diameter of the adsorbent particle is (3-8):1. That is, multiple adsorbents can pass through the same sieve hole side by side. Preferably, the ratio of the diameter of the sieve hole to the diameter of the adsorbent particle is 5:1, and 5 adsorbents can pass through the same sieve hole side by side to ensure smooth material delivery.

[0041] In some embodiments, Figure 1 As shown, the material distribution assembly also includes a material distribution plate 35 and a plurality of material distribution cylinders 36. The material distribution plate 35 is located above the sieve plate 34, and the material distribution plate 35 is circular, and the outer peripheral wall of the material distribution plate 35 is closely connected to the inner peripheral wall of the tower body 1. The material distribution cylinders 36 are arranged in the up and down direction, and the upper end of the material distribution cylinders 36 is connected to the material distribution plate 35, and the material distribution plate 35 is provided with material distribution holes corresponding to and connected to the plurality of material distribution cylinders 36. An avoidance hole is provided at the center of the material distribution plate 35, and the connecting rod 33 passes through the avoidance hole.

[0042] It can be understood that by providing the distribution plate 35 and the distribution cylinder 36, the adsorbent falling through the feed port 101 is evenly distributed on the screen plate 34, and then the screen plate 34 is moved up and down to distribute the material, thereby further improving the uniformity of the distribution. In addition, by providing an avoidance hole at the center of the distribution plate 35, the distribution plate 35 is prevented from interfering with the movement of the connecting rod 33.

[0043] Optionally, the ratio of the diameter of the distributing cylinder 36 to the diameter of the feed inlet 101 is 1:(2-5), and the ratio of the diameter of the distributing cylinder 36 to the diameter of the sieve hole is (1.5-4): 1. That is, the diameter of the distributing cylinder 36 is smaller than the diameter of the feed inlet 101, and the diameter of the sieve hole is smaller than the diameter of the distributing cylinder 36, thereby achieving a step-by-step distributing effect.

[0044] Preferably, the ratio of the diameter of the distribution cylinder 36 to the diameter of the feed port 101 is 1:5, and the ratio of the diameter of the distribution cylinder 36 to the diameter of the sieve hole is 3:1, so as to ensure smooth delivery of the adsorbent.

[0045] In some embodiments, Figure 1As shown, the smoke inlet 103 is located between the first support plate 21 and the second support plate 22, and the smoke outlet 104 is located between the screen plate 34 and the cloth plate 35. The smoke enters the air intake section 12 through the smoke inlet 103, and evenly enters the adsorption section 11 through multiple adsorption tubes 23, flows upward to contact the adsorbent in countercurrent, then flows through the sieve holes to the top of the screen plate 34, and finally is discharged through the smoke outlet 104. In this way, not only the adsorption purification is limited, but also the rationality of the smoke flow is ensured.

[0046] In some embodiments, Figure 1 As shown, the vent hole extends in the horizontal direction so that the smoke flowing into the air inlet section 12 horizontally through the smoke inlet 103 enters the adsorption cylinder 23 perpendicular to the flow direction of the adsorbent. That is, the smoke and the adsorbent first contact in a cross-flow manner, and after the smoke enters the adsorption cylinder 23, the smoke and the adsorbent contact in a counter-flow manner.

[0047] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention 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 limiting the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0051] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0052] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A moving bed type flue gas adsorption purification equipment, characterized in that: include: A tower body, wherein the tower body has a cavity, and the tower body is provided with a feed inlet, a discharge inlet, a smoke inlet and a smoke outlet connected to the cavity; An air intake assembly, the air intake assembly comprising a first support plate, a second support plate and a plurality of adsorption cylinders arranged between the first support plate and the second support plate, the first support plate and the second support plate dividing the cavity into an adsorption section, an air intake section and a discharge section spaced apart from each other in a direction from top to bottom, so that the adsorbent sequentially flows through the feed port, the adsorption section, the adsorption cylinder, the discharge section and the discharge port and forms an adsorbent bed in the cavity, a plurality of vents are arranged on the peripheral wall of the adsorption cylinder, so that the smoke sequentially flows through the smoke inlet, the air intake section, the vents, the adsorption cylinder, the adsorption section and the smoke outlet and is adsorbed and purified through the adsorbent bed; A cloth assembly is arranged above the adsorbent bed layer so that the adsorbent falls through the cloth assembly to level the top of the adsorbent bed layer.

2. The moving bed type flue gas adsorption purification equipment according to claim 1 is characterized in that: The feed inlet is located at the top of the tower body, and there are multiple feed inlets, which are spaced around the central axis of the tower body, and the discharge port is located at the bottom of the tower body.

3. The moving bed type flue gas adsorption purification equipment according to claim 2 is characterized in that: The cloth assembly includes a motor, a driving plate, a connecting rod and a screen plate, the driving plate is circular, the output shaft of the motor is connected to the driving plate, the central axis of the driving plate is coaxial with the central axis of the output shaft of the motor, the first end of the connecting rod is rotatably connected to the driving plate, the second end of the connecting rod is rotatably connected to the screen plate, the screen plate is movably arranged above the adsorbent bed along the axial direction of the tower body, and a plurality of screen holes are provided on the screen plate.

4. The moving bed type flue gas adsorption purification equipment according to claim 3 is characterized in that: The ratio of the diameter of the sieve hole to the diameter of the adsorbent particles is (3-8):

1.

5. The moving bed type flue gas adsorption purification equipment according to claim 3 is characterized in that: The cloth assembly also includes a cloth plate and a plurality of cloth tubes arranged on the cloth plate. The cloth plate is located above the screen plate. An avoidance hole is provided at the center of the cloth plate. The connecting rod passes through the avoidance hole. The cloth plate is provided with cloth holes that correspond to and are connected to the plurality of cloth tubes one by one.

6. The moving bed type flue gas adsorption purification equipment according to claim 5, characterized in that: The ratio of the diameter of the material distributing cylinder to the diameter of the material feeding port is 1:(2-5).

7. The moving bed type flue gas adsorption purification equipment according to claim 5, characterized in that: The ratio of the diameter of the material distributing cylinder to the diameter of the sieve hole is (1.5-4):

1.

8. The moving bed type flue gas adsorption purification equipment according to claim 5, characterized in that: The smoke inlet is located between the first support plate and the second support plate, and the smoke outlet is located between the screening plate and the distribution plate.

9. The moving bed type flue gas adsorption purification equipment according to any one of claims 1 to 8, characterized in that: The cross-sectional area of ​​the blanking section gradually decreases from top to bottom.

10. The moving bed type flue gas adsorption purification equipment according to any one of claims 1 to 8, characterized in that: The adsorption cylinder is arranged in a vertical direction, and the vent hole extends in a horizontal direction.

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