Multi-flue integrated desulfurization device

Abstract

The utility model discloses a multi-flue integrated desulfurization device which comprises a desulfurization absorption tower used for desulfurizing flue gas; the chimney is arranged above the desulfurizing absorption tower, and the flue gas treated by the desulfurizing absorption tower is discharged into the atmosphere through the chimney; the supporting tower is arranged on the peripheries of the desulfurizing absorption tower and the chimney, is used for supporting and fixing the desulfurizing absorption tower and the chimney, and is of a structure with a wide lower part and a narrow upper part; the plurality of flues are communicated with the desulfurizing absorption tower and are used for feeding the flue gas after combustion into the desulfurizing absorption tower; wherein the plurality of flues are arranged around the desulfurizing absorption tower at uniform intervals in the circumferential direction; a plurality of flue ports are correspondingly formed in the lower part of the supporting tower frame; and the plurality of flues are connected with the desulfurizing absorption tower through the plurality of flue ports. According to the device disclosed by the utility model, the occupied space is reduced, the stress of the device is more balanced, the flowing path of flue gas in the desulfurizing absorption tower is increased, and the desulfurization rate is higher.

Description

Technical Field

[0001] The utility model relates to the field of power generation, and more specifically to a multi-flue integrated desulfurization device. Background Art

[0002] At present, large-capacity coal-fired power plants usually use wet desulfurization technology. Usually, each unit corresponds to a desulfurization absorption tower. The flue gas at the outlet of the absorption tower is discharged into the atmosphere through an independent chimney. The desulfurization absorption tower and the chimney are usually separated and independently set. At present, the inlet flue of the absorption tower usually adopts a single-side tower entry method. The disadvantages of the single-side access method are as follows:

[0003] 1) It occupies a large space and needs to consider the site of the desulfurization absorption tower, chimney and outlet flue;

[0004] 2) The outlet flue adopts the top-out and bottom-in method, which is long and increases the project investment. For a 600MW unit, the additional investment is about 2 million;

[0005] 3) Due to the existence of the outlet flue, the system resistance increases by about 150Pa, and the operating electricity cost of the unit increases. For a 600MW unit, the annual operating electricity cost increases by 250,000 yuan.

[0006] Therefore, the art still lacks a new arrangement method that can effectively overcome the above problems. Utility Model Content

[0007] The purpose of the utility model is to provide a multi-flue integrated desulfurization device. The device of the utility model reduces the occupied space, and the multi-side tower entry method makes the force of the entire device more balanced, and increases the flow path of the flue gas in the desulfurization absorption tower, and increases its contact time and contact area with the alkaline substances in the desulfurization absorption tower, thereby having a higher desulfurization rate.

[0008] The utility model provides a multi-flue integrated desulfurization device, which comprises: a desulfurization absorption tower, which is used for desulfurization treatment of flue gas; a chimney, which is arranged above the desulfurization absorption tower, and the flue gas treated by the desulfurization absorption tower is discharged into the atmosphere through the chimney; a supporting tower, which is arranged on the periphery of the desulfurization absorption tower and the chimney, and is used for supporting and fixing the desulfurization absorption tower and the chimney, and the supporting tower is a structure that is wide at the bottom and narrow at the top; and a plurality of flues, which are connected with the desulfurization absorption tower and are used for sending the flue gas after combustion into the desulfurization absorption tower; wherein the plurality of flues are arranged around the desulfurization absorption tower at uniform intervals in the circumferential direction; a plurality of flue openings are correspondingly provided at the lower part of the supporting tower, and the plurality of flues are connected with the desulfurization absorption tower through the plurality of flue openings.

[0009] In another preferred example, the outlets of the multiple flues are arranged at an inclination angle relative to the radial direction of the desulfurization absorption tower, so that the flue gas enters the desulfurization absorption tower along a direction different from the radial direction and forms a rotating upward fluid flow pattern, thereby increasing the flow path of the flue gas to be treated, and increasing its contact time and contact area with the alkaline substances in the desulfurization absorption tower.

[0010] In another preferred embodiment, the angle formed by the outlets of the plurality of flues in the circumferential direction of the desulfurization absorption tower relative to the radial direction of the desulfurization absorption tower is 0-60 degrees; preferably, 30-50 degrees; more preferably, 35-45 degrees.

[0011] In another preferred embodiment, the angles formed by the outlets of the plurality of flues relative to the radial direction of the desulfurization absorption tower in the circumferential direction of the desulfurization absorption tower are all the same.

[0012] In another preferred embodiment, the angles formed by the outlets of the plurality of flues relative to the radial direction of the desulfurization absorption tower in the circumferential direction of the desulfurization absorption tower are not completely the same.

[0013] In another preferred example, the plurality of flues are fixedly connected to the side wall of the desulfurization absorption tower, and the plurality of flues are fixed at the same height of the desulfurization absorption tower.

[0014] In another preferred embodiment, the outlets of the plurality of flues are inclined downward.

[0015] In another preferred embodiment, the downward inclination angle of the outlets of the plurality of flues relative to the cross section of the desulfurization absorption tower is 0-30 degrees; preferably, 5-20 degrees; more preferably, 10-15 degrees.

[0016] In another preferred embodiment, the outlets of the plurality of flues are inclined downward to the same extent.

[0017] In another preferred embodiment, the downward inclination degrees of the outlets of the plurality of flues are not exactly the same.

[0018] In another preferred example, the number of the flues is two, and the two flues are arranged opposite to each other.

[0019] In another preferred embodiment, the number of the flues is four, and the four flues are arranged at 90 degrees. The outer peripheral shape of the support tower is a quadrilateral. The four flues are arranged on four faces of the support tower.

[0020] In another preferred example, a cooling element is provided between the flue opening and the flue, and the cooling element is used to cool the flue gas in the flue.

[0021] In another preferred embodiment, a heating element is provided in the chimney, and the heating element is used to heat the treated flue gas in the chimney.

[0022] In another preferred example, the supporting tower includes a plurality of ridge support beams, a plurality of transverse support beams and a plurality of diagonal support beams, wherein the plurality of ridge support beams are connected into a whole through the transverse support beams, and the plurality of diagonal support beams are used to connect the plurality of ridge support beams and the plurality of transverse support beams into a whole, and establish a connection with the chimney to form a plurality of triangular structures.

[0023] In another preferred example, a plurality of auxiliary support ribs are provided at the lower portion of the support tower, the plurality of auxiliary support ribs are radially arranged, one end of the plurality of auxiliary support ribs is fixedly connected to the desulfurization absorption tower, and the other end of the plurality of auxiliary support ribs is fixedly connected to the lower portion of the support tower.

[0024] In another preferred embodiment, a plurality of anchoring parts are provided at the bottom of the supporting tower, and the anchoring parts include cement columns cast deep underground and metal anchors cast together with the cement columns, and the bottom of the ridge support beam is welded and fixed to the anchors.

[0025] In another preferred embodiment, the total cross-sectional area of ​​the plurality of flues is 60 m 2 -140m 2 .

[0026] In another preferred embodiment, the plurality of flues are two flues, each of which has a cross-sectional area of ​​30 m 2 -70m 2 .

[0027] In another preferred embodiment, the cross-sectional area of ​​the supporting tower gradually decreases from bottom to top.

[0028] In another preferred example, the device comprises a flue support frame, and the flue support frame is used to support the flue.

[0029] In another preferred example, the flue support frame is connected to the support tower frame as a whole.

[0030] The main advantages of the utility model include:

[0031] (a) It is directly installed on the top of the desulfurization absorption tower, eliminating the outlet flue, and its stability is ensured by auxiliary support through the supporting tower frame, and the floor space is reduced by more than 50%;

[0032] (b) The inlet flue of the desulfurization absorption tower adopts a multi-side tower entry method, which solves the problem of difficulty in single-side tower entry, and the multi-side tower entry makes the force of the entire device more balanced;

[0033] (c) By setting up multiple flues, the flow path of the flue gas to be treated can be increased, and the contact time and contact area between the flue gas and the alkaline substances in the desulfurization absorption tower can be increased, resulting in a higher desulfurization rate;

[0034] (d) Reduce project investment and subsequent operating electricity costs.

[0035] It should be understood that within the scope of the present invention, the above-mentioned technical features of the present invention and the technical features specifically described below (such as embodiments) can be combined with each other to form a new or preferred technical solution. Due to space limitations, they will not be described one by one here. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 It is a schematic front view of a multi-flue integrated desulfurization device in one example of the utility model;

[0038] Figure 2 It is a schematic longitudinal cross-sectional view of a multi-flue integrated desulfurization device in an example of the utility model.

[0039] In the accompanying drawings, the symbols are as follows:

[0040] 1- Desulfurization absorption tower;

[0041] 2-Chimney;

[0042] 3-Support tower;

[0043] 4- Flue. DETAILED DESCRIPTION

[0044] After extensive and in-depth research and a large amount of screening, the inventor has developed a multi-flue integrated desulfurization device for the first time. The device of the utility model will be directly arranged on the top of the desulfurization absorption tower, eliminating the outlet flue, and its stability is ensured by auxiliary support through the supporting tower frame; the space under the supporting tower frame is utilized to reduce the floor space (for example, the floor space is reduced by more than 50%), and the inlet flue of the desulfurization absorption tower adopts a multi-side tower entry method, and solves the problem of difficulty in single-side tower entry, and the multi-side tower entry makes the force of the entire device more balanced; through the setting of multiple flues, the flow path of the flue gas to be treated can be increased, as well as the contact time and contact area between the flue gas and the alkaline substances in the desulfurization absorption tower can be increased, with a higher desulfurization rate; at the same time, the project investment and subsequent operating electricity costs are reduced; on this basis, the utility model is completed.

[0045] the term

[0046] As used herein, the term "desulfurization absorber" refers to a tower that uses physical and chemical treatment methods to remove sulfur dioxide (SO 2 ) device.

[0047] As used herein, the term "flue" refers to a passage for conveying flue gas in a thermal power plant.

[0048] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, the accompanying drawings are schematic diagrams, so the device and equipment of the present invention are not limited by the size or proportion of the schematic diagrams.

[0049] It should be noted that in the claims and description of this patent, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0050] Example

[0051] The multi-flue integrated desulfurization device of this embodiment is as follows Figure 1-2As shown, it includes a desulfurization absorption tower 1, a chimney 2 arranged on the desulfurization absorption tower 1, a support tower 3 built outside the desulfurization absorption tower 1 and the chimney 2 (used to support and fix the desulfurization absorption tower 1 and the chimney 2), and two symmetrically arranged flues 4 leading into the desulfurization absorption tower 1. Two flue openings are correspondingly arranged at the lower part of the support tower 3, and the two flues 4 are connected to the desulfurization absorption tower 1 through the two flue openings.

[0052] The flue gas after combustion enters the desulfurization absorption tower 1 through the flue 4, and the flue gas is desulfurized in the desulfurization absorption tower 1. The flue gas treated by the desulfurization absorption tower 1 is discharged into the atmosphere through the chimney 2.

[0053] The outlet direction of the flue 4 is angled relative to the desulfurization absorber tower 1, including the outlet direction of the flue 4 is angled in the circumferential direction of the desulfurization absorber tower 1 relative to the radial direction of the desulfurization absorber tower 1, and the outlet direction of the flue 4 is tilted downward relative to the cross-section of the desulfurization absorber tower 1.

[0054] The angle (circumferential inclination angle) formed by the outlet direction of the flue 4 relative to the radial direction of the desulfurization absorption tower 1 in the circumferential direction of the desulfurization absorption tower 1 is 0-60 degrees; preferably, 30-50 degrees; more preferably, 35-45 degrees. The downward inclination angle (axial inclination angle) of the outlet direction of the flue 4 relative to the cross-section of the desulfurization absorption tower 1 is 0-30 degrees; preferably, 5-20 degrees; more preferably, 10-15 degrees. Preferably, the circumferential inclination angle or axial inclination angle of the two flues 4 are the same. However, if there are protrusions or components in the desulfurization absorption tower 1 that block the flow of flue gas, the above-mentioned inclination angle can be adaptively adjusted to make the airflow flow smoother.

[0055] The angled setting of the flue 4 allows the flue gas to enter the desulfurization absorption tower 1 along a radial direction different from that of the same cross section, and forms a rotating upward fluid flow pattern, thereby increasing the flow path of the flue gas to be treated, and increasing its contact time and contact area with the alkaline substances in the desulfurization absorption tower 1, thereby improving the desulfurization rate.

[0056] The flue 4 is fixedly connected to the side wall of the desulfurization absorption tower 1 , and preferably the two flues 4 are fixed at the same height of the desulfurization absorption tower 1 .

[0057] The total cross-sectional area of ​​the two flues 4 is 60m 2 -140m 2 The cross-sectional area of ​​each flue 4 is 30m 2 -70m 2This shortens the width of the inlet flue 4, ensuring that the inlet flue 4 can be smoothly connected to the desulfurization absorption tower 1, and the situation where the flue 4 is too large to enter the desulfurization absorption tower 1 will not occur, and the cross-section of the flue opening on one side of the lower part of the supporting tower 3 is made as small as possible, so that the supporting tower 3 has more construction space on each side, which is beneficial to its structural stability, so as to make full use of the lower space of the supporting tower 3.

[0058] A cooling element is provided between the flue opening and the flue 4 for cooling the flue gas in the flue 4. The cooler can also recover the heat of the flue gas for other purposes, such as utilizing the waste heat of the flue gas to increase the temperature of condensed water and provide heating to users in winter, etc. This also reduces the amount of water evaporation in the desulfurization absorption tower 1, thereby reducing the amount of water replenishment in the absorption tower, saving water for desulfurization, and achieving the purpose of energy saving and consumption reduction.

[0059] A heating element is provided in the chimney 2 for heating the treated flue gas in the chimney 2, thereby avoiding excessive flow velocity of the flue gas in the chimney 2 and large equipment resistance, and further avoiding the problems of high operating power and high power consumption of the induced draft fan, which has the beneficial effects of reducing the operating power of the induced draft fan, reducing energy consumption and improving the overall operating economy of the unit.

[0060] The support tower 3 is a structure that is wide at the bottom and narrow at the top. The support tower 3 is a steel tower, including a plurality of ridge support beams, a plurality of transverse support beams and a plurality of oblique support beams, wherein the plurality of ridge support beams are connected as a whole through the transverse support beams, and the plurality of oblique support beams are used to connect the plurality of ridge support beams and the plurality of transverse support beams as a whole, and establish a connection with the chimney 2 to form a plurality of triangular structures. Preferably, a plurality of auxiliary support ribs are provided at the lower part of the support tower 3, the plurality of auxiliary support ribs are radially arranged, one end of the plurality of auxiliary support ribs is fixedly connected to the desulfurization absorption tower 1, and the other end of the plurality of auxiliary support ribs is fixedly connected to the lower part of the support tower 3. Preferably, a plurality of anchoring parts are provided at the bottom of the support tower 3, the anchoring parts include a cement column cast deep into the ground, a metal anchor cast together with the cement column, and the bottom of the ridge support beam is welded and fixed to the anchor. Preferably, the device includes a flue support frame, the flue support frame is used to support the flue 4, and the flue support frame is connected to the support tower 3 as a whole.

[0061] The device of this embodiment is particularly suitable for the case where only a single unit is built in a large-capacity coal-fired thermal power plant. Large-capacity thermal power plants usually have two induced draft fans, which connect the flue gas to the desulfurization absorption tower 1 through the inlet flue 4. After adopting the utility model, the two induced draft fans can be arranged on both sides of the desulfurization absorption tower 1, and the flue gas can be symmetrically connected to the desulfurization absorption tower 1 through the inlet flue 4, which makes the process smooth, saves space, and reduces the power consumption of the unit.

[0062] All documents mentioned in this utility model are cited as references in this application, just as each document is cited as reference separately. In addition, it should be understood that after reading the above teaching content of the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A multi-flue integrated desulfurization device, characterized in that: The device comprises: A desulfurization absorption tower, wherein the desulfurization absorption tower is used to desulfurize the flue gas; A chimney, wherein the chimney is arranged above the desulfurization absorption tower, and the flue gas treated by the desulfurization absorption tower is discharged into the atmosphere through the chimney; A support tower, the support tower being arranged at the periphery of the desulfurization absorption tower and the chimney, and used for supporting and fixing the desulfurization absorption tower and the chimney, the support tower being a structure that is wide at the bottom and narrow at the top; and A plurality of flues, wherein the plurality of flues are connected to the desulfurization absorption tower and are used to send the flue gas after combustion into the desulfurization absorption tower; Wherein, a plurality of flues are arranged around the desulfurization absorption tower at even intervals in the circumferential direction; A plurality of flue openings are correspondingly arranged at the lower part of the supporting tower frame, and the plurality of flues are connected to the desulfurization absorption tower through the plurality of flue openings.

2. The device according to claim 1, characterized in that The outlets of the plurality of flues are arranged at an inclination angle relative to the radial direction of the desulfurization absorption tower, so that the flue gas enters the desulfurization absorption tower along a direction different from the radial direction and forms a rotating upward fluid flow pattern.

3. The device according to claim 2, characterized in that The angle formed by the outlets of the plurality of flues in the circumferential direction of the desulfurization absorption tower relative to the radial direction of the desulfurization absorption tower is 0-60 degrees.

4. The device according to claim 1, characterized in that The plurality of flues are fixedly connected to the side wall of the desulfurization absorption tower, and the plurality of flues are fixed at the same height of the desulfurization absorption tower.

5. The device according to claim 1, characterized in that The outlets of the plurality of flues are inclined downward.

6. The device according to claim 5, characterized in that The outlets of the plurality of flues are inclined downward at an angle of 0-30 degrees relative to the cross section of the desulfurization absorption tower.

7. The device according to any one of claims 1 to 6, characterized in that The number of the flues is two, and the two flues are arranged opposite to each other.

8. The device according to any one of claims 1 to 6, characterized in that A cooling element is provided between the flue opening and the flue, and the cooling element is used for cooling the flue gas in the flue.

9. The device according to any one of claims 1 to 6, characterized in that A heating element is arranged in the chimney, and the heating element is used to heat the treated flue gas in the chimney.

10. The device according to any one of claims 1 to 6, characterized in that The supporting tower includes a plurality of ridge support beams, a plurality of transverse support beams and a plurality of diagonal support beams, wherein the plurality of ridge support beams are connected into a whole through the transverse support beams, and the plurality of diagonal support beams are used to connect the plurality of ridge support beams and the plurality of transverse support beams into a whole, and establish a connection with the chimney to form a plurality of triangular structures.

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