CN212017317U - An energy-saving flow-sharing desulfurization absorption tower based on high-level arrangement - Google Patents

Abstract

The utility model discloses an energy-conserving desulfurization absorption tower that flow equalizes based on high-order arrangement, including the thick liquid collector, the entry flue, the slurry circulating pump, the support frame and be fixed in the absorption tower body on the support frame, this internal defroster that has set gradually from the top down of absorption tower, layer and boiling layer spray, the top of absorption tower body is provided with the exhanst gas outlet, the entry of slurry collector is linked together with the slurry outlet of absorption tower body, the export of slurry collector is linked together through slurry circulating pump and the entry that sprays the layer, the entry flue is linked together with the flue gas entry of absorption tower body, wherein, the flue gas entry of absorption tower body is located the below that sprays the layer, this absorption tower's occupation of land space is little, the equipment increase volume is little, and the flue trend is simple, the operation.

Description

An energy-saving flow-sharing desulfurization absorption tower based on high-level arrangement

technical field

The utility model belongs to the technical field of energy-saving and environmental protection, and relates to an energy-saving and flow-sharing desulfurization absorption tower based on a high-level arrangement.

Background technique

At present, the country is vigorously promoting the ultra-low emission transformation of coal-fired power plants. The limestone-gypsum wet desulfurization process is the most widely used flue gas desulfurization technology in domestic coal-fired power plants. More than 90% of the flue gas desulfurization devices in domestic coal-fired power plants are This process has the advantages of mature technology, wide source of absorbent, low price and high desulfurization efficiency. After the implementation of ultra-low emission transformation, the SO ₂ concentration of the flue gas at the chimney inlet is required to be less than 35mg/m ³ (standard state, dry basis, 6% O ₂ ), and the desulfurization efficiency of the flue gas desulfurization device generally must reach more than 99%. However, due to the need to reduce the operating cost of coal-fired power plants, coal with high sulfur content is generally used, resulting in high SO ₂ concentration at the inlet of the desulfurization device.

When the concentration of SO ₂ at the inlet of the desulfurization unit is high, if the flue gas desulfurization unit adopts the single-tower scheme, the system resistance is high, the stable operating pressure is high, and the system energy consumption is high. Therefore, when the designed inlet SO ₂ concentration of the desulfurization unit is high, the double-tower and double-cycle process with higher desulfurization capacity is mostly used in the desulfurization and efficiency improvement. The double-tower double-circulation process requires a new absorption tower, which is operated in conjunction with the original absorption tower to form a high and low pH value, so as to meet the ultra-low emission requirements of SO ₂ . However, if the traditional way of building a new absorption tower takes up a lot of space, more equipment is added, and the flue is complicated, resulting in high operating investment costs, and even some coal-fired power plants are difficult to use this process for renovation due to the tight space of the site.

Utility model content

The purpose of this utility model is to overcome the shortcomings of the above-mentioned prior art, and to provide an energy-saving and uniform-flow desulfurization absorption tower based on a high-level arrangement. Low investment cost.

In order to achieve the above purpose, the energy-saving and uniform-flow desulfurization absorption tower based on the high-level arrangement of the present invention includes a slurry collector, an inlet flue, a slurry circulating pump, a support frame, and an absorption tower body fixed on the support frame. A mist eliminator, a spray layer and a boiling layer are arranged in sequence from top to bottom, the top of the absorption tower body is provided with a flue gas outlet, the inlet of the slurry collector is communicated with the slurry outlet of the absorption tower body, and the outlet of the slurry collector The slurry circulating pump is communicated with the inlet of the spray layer, and the inlet flue is communicated with the flue gas inlet of the absorption tower body, wherein the flue gas inlet of the absorption tower body is located below the spray layer.

The absorption tower body is provided with a liquid collecting hopper, the flue gas inlet of the absorption tower body is located at the bottom of the absorption tower body, the liquid collecting hopper is located under the spray layer, and the liquid collecting hopper is provided with a number of through holes for the passage of the flue gas , the bottom outlet of the sump is communicated with the inlet of the slurry collector.

The flue gas inlet of the absorption tower body is located on the side wall of the absorption tower body, and the inlet of the slurry collector is communicated with the slurry outlet on the bottom side of the absorption tower body.

The bottom of the absorption tower body is inclined and distributed, and the slurry outlet is located at the lowest position of the bottom of the absorption tower body.

The inlet of the slurry collector is communicated with the slurry outlet of the absorption tower body through a slurry discharge pipeline.

The slurry discharge pipes are distributed obliquely.

The support frame is a steel frame structure.

The utility model has the following beneficial effects:

When the energy-saving and equal-flow desulfurization absorption tower based on the high-level arrangement of the utility model is operated again, the slurry tank is separated from the absorption tower body, and the absorption tower body is supported by the support frame, so as to save the site space, and the inlet flue of the absorption tower The high-level arrangement is adopted to reduce the flue bends, the equipment increase is small, the flue direction is simple, the operation investment cost is low, the flue fluency is guaranteed to the greatest extent, the resistance of the flue gas system is reduced, and the slurry sprayed by the spray layer is collected. In the slurry collector, the slurry collector is directly connected to the slurry circulation pump, and the slurry agitator can no longer be installed. At the same time, by adjusting the height of the slurry collector, the head of the slurry circulation pump can be effectively reduced. Increase the head of the slurry circulating pump.

Description of drawings

1 is a schematic structural diagram of Embodiment 1;

FIG. 2 is a schematic structural diagram of the second embodiment.

Among them, 1 is the inlet flue, 2 is the flue gas outlet, 3 is the liquid collecting hopper, 4 is the boiling layer, 5 is the spray layer, 6 is the mist eliminator, 7 is the slurry discharge pipe, 8 is the slurry collector, 9 It is a slurry circulation pump, and 10 is a support frame.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail:

Example 1

Referring to FIG. 1 , the energy-saving and uniform-flow desulfurization absorption tower based on the high-level arrangement of the present invention includes a slurry collector 8 , an inlet flue 1 , a slurry circulating pump 9 , a support frame 10 and an absorption tower body fixed on the support frame 10 , the absorption tower body is provided with a mist eliminator 6, a spray layer 5 and a boiling layer 4 in order from top to bottom, the top of the absorption tower body is provided with a flue gas outlet 2, the inlet of the slurry collector 8 and the slurry of the absorption tower body The outlet is communicated, the outlet of the slurry collector 8 is communicated with the inlet of the spray layer 5 through the slurry circulating pump 9, and the inlet flue 1 is communicated with the flue gas inlet of the absorption tower body, wherein the flue gas inlet of the absorption tower body is located at Below the spray layer 5.

The absorption tower body is provided with a liquid collecting hopper 3. The flue gas inlet of the absorption tower body is located at the bottom of the absorption tower body. Through the through hole, the bottom outlet of the liquid collecting bucket 3 is communicated with the inlet of the slurry collector 8 .

The inlet of the slurry collector 8 is communicated with the slurry outlet of the absorption tower body through the slurry discharge pipe 7; the slurry discharge pipe 7 is distributed obliquely; the support frame 10 is a steel frame structure.

The specific working process of this embodiment is as follows: the flue gas enters the absorption tower body from the inlet flue 1, passes through the liquid collecting hopper 3, the boiling layer 4, the spray layer 5 and the mist eliminator 6 in sequence, and finally passes through the top of the absorption tower body. The flue gas outlet 2 is discharged. In this embodiment, the porous liquid collecting hopper 3 and the boiling layer 4 are used to equalize the flow field of the flue gas. When the flue gas flows through the boiling layer 4 and the spray layer 5, it contacts and reacts with the slurry. In order to remove most of the SO ₂ components in the flue gas, the mist eliminator 6 intercepts the droplets carried in the flue gas and then discharges them.

The slurry sprayed by the spray layer 5 falls into the liquid collecting hopper 3 through the boiling layer 4, and then is collected by the liquid collecting hopper 3 and then enters the slurry collector 8 through the slurry discharge pipeline 7, and finally the slurry collector 8 is collected by the slurry circulating pump 9. The slurry in the middle is transported to the spray layer 5 for spraying to complete the slurry circulation.

Embodiment 2

The difference between this embodiment and the first embodiment is that the liquid collecting hopper 3 is cancelled, the inlet flue 1 is arranged on the tower wall between the bottom of the absorption tower body and the boiling layer 4, and the bottom of the absorption tower body is designed to have a certain On the inclined plane of the inclination angle, the slurry discharge pipe 7 is connected to the slurry collector 8 from the lowest part of the bottom of the absorption tower.

The significance of this embodiment is: on the basis of realizing the high-level arrangement of the absorption tower body, the system design is simplified, the liquid collecting hopper 3 is cancelled, and the inlet flue 1 is arranged above the bottom of the absorption tower body to avoid the operation of the liquid collecting hopper 3. The poor result in the slurry falling into the inlet flue 1, which in turn leads to the problem of fouling of the inlet flue 1.

Claims (7)

1. The utility model provides an energy-conserving desulfurization absorption tower that flow equalizes based on high-order arrangement, a serial communication port, including slurry collector (8), entry flue (1), slurry circulating pump (9), support frame (10) and be fixed in the absorption tower body on support frame (10), demister (6) has set gradually from the top down in the absorption tower body, spray layer (5) and boiling layer (4), the top of absorption tower body is provided with exhanst gas outlet (2), the entry of slurry collector (8) is linked together with the slurry outlet of absorption tower body, the export of slurry collector (8) is linked together through slurry circulating pump (9) and the entry that sprays layer (5), entry flue (1) is linked together with the flue gas inlet of absorption tower body, wherein, the flue gas inlet of absorption tower body is located the below that sprays layer (5).

2. The energy-saving flow-equalizing desulfurization absorption tower based on the high-position arrangement according to claim 1, wherein a liquid collecting hopper (3) is arranged in the absorption tower body, a flue gas inlet of the absorption tower body is positioned at the bottom of the absorption tower body, the liquid collecting hopper (3) is positioned below the spraying layer (5), a plurality of through holes for flue gas to pass through are formed in the liquid collecting hopper (3), and a bottom outlet of the liquid collecting hopper (3) is communicated with an inlet of the slurry collector (8).

3. The energy-saving flow-equalizing desulfurization absorption tower based on the high-level arrangement according to claim 1, wherein the flue gas inlet of the absorption tower body is located on the side wall of the absorption tower body, and the inlet of the slurry collector (8) is communicated with the slurry outlet on the side surface of the bottom of the absorption tower body.

4. The energy-saving flow-equalizing desulfurization absorption tower based on the high-level arrangement according to claim 3, wherein the bottom of the absorption tower body is obliquely distributed, and the slurry outlet is located at the lowest position of the bottom of the absorption tower body.

5. The energy-saving flow-equalizing desulfurization absorption tower based on the high-level arrangement as claimed in claim 1, wherein the inlet of the slurry collector (8) is communicated with the slurry outlet of the absorption tower body through a slurry discharge pipe (7).

6. The energy-saving flow equalizing desulfurization absorption tower based on the high-position arrangement according to claim 5, characterized in that the slurry discharge pipes (7) are distributed in an inclined manner.

7. The energy-saving flow equalizing desulfurization absorption tower based on the high-position arrangement according to claim 1, characterized in that the support frame (10) is a steel frame structure.

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