CN205235729U - Desulfurization and denitrification device for smoke - Google Patents

Abstract

The utility model discloses a flue gas desulfurization and denitrification device, which comprises a flue gas inlet pipe and a flue gas outlet pipe. The right side of the flue gas inlet pipe is connected with a dust collector, and the right side of the dust collector is connected with a pretreatment pipe through a pipe. A spray head is provided, and the spray head is connected with the ammonia liquid storage tank arranged at the upper end of the pretreatment pipe through a catheter, and a liquid discharge port is arranged at the lower end of the pretreatment pipe; the pretreatment pipe passes through the pipe and the flue gas desulfurization on the right side The towers are connected; the flue gas desulfurization tower is connected to the flue gas denitrification tower on the right side and the SCR reactor through pipes, and the lower end of the SCR reactor is provided with a heating device; the right side of the SCR reactor is provided with a flue gas outlet pipe. The structure design of the new type is reasonable, and by adding dust removal and pre-desulfurization measures, the loss of the equipment is lower, and there will be no blockage or large corrosion, so the overall life of the equipment is longer; the denitrification and desulfurization effects are good, and the harmful side reactions Less impact on catalyst life, lower denitrification cost, and simplified process flow.

Description

A flue gas desulfurization and denitrification device

technical field

The utility model relates to the technical field of environmental protection equipment, in particular to a flue gas desulfurization and denitrification device.

Background technique

With the development of modern industrial technology, the harm of polluting flue gas produced in the process of energy utilization to the ecological environment and human life has become a problem that cannot be ignored. Taking heavy polluting industries such as power plants, heating boilers, and glass manufacturing as examples, the flue gas produced by burning fuels such as coal tar, natural gas, petroleum coke powder, and even raw coal in boilers or kilns mainly contains dust, sulfur oxides, and nitrogen oxides. And many other harmful substances, if directly discharged into the air, will not only pollute the ecological environment and endanger human health, but also corrode the production equipment and adversely affect the entire production process.

As people's awareness of environmental protection gradually increases, flue gas emission standards are also becoming increasingly stringent. Therefore, the denitrification efficiency of existing flue gas purification technology needs to be further improved. On this basis, it should also be properly controlled by improving flue gas purification technology. Pollutant treatment costs to reduce the burden on enterprises.

Utility model content

The purpose of this utility model is to provide a flue gas desulfurization and denitrification device to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

A flue gas desulfurization and denitrification device, comprising a flue gas inlet pipe and a flue gas outlet pipe, the right side of the flue gas inlet pipe is connected to a dust collector, and the right side of the dust collector is connected to a pretreatment pipe through a pipe, and the pretreatment A spray head is arranged in the pipe, and the spray head communicates with the ammonia liquid storage tank arranged at the upper end of the pretreatment pipe through a catheter, and a liquid discharge port is arranged at the lower end of the pretreatment pipe; the pretreatment pipe passes through the pipeline It communicates with the flue gas desulfurization tower on its right side; the flue gas desulfurization tower communicates with the flue gas denitrification tower and the SCR reactor on its right side in turn through pipelines, and the lower end of the SCR reactor is provided with a heating device; the SCR reactor A flue gas outlet pipe is arranged on the right side, an induced draft fan is arranged at the right end of the flue gas outlet pipe, and a mist eliminator is arranged at the left end of the flue gas outlet pipe.

As a further solution of the utility model: the dust collector is a cyclone separator.

As a further solution of the utility model: the induced draft fan is a centrifugal induced draft fan.

As a further solution of the utility model: the flue gas desulfurization tower and the flue gas denitrification tower have the same shape.

Compared with the prior art, the beneficial effect of the utility model is: a dust remover is provided, the dust remover is a cyclone separator, and the dust removal effect is good, and the situation of pipeline blockage in the long-term use of the new model is avoided; The flue gas enters the pretreatment pipe, and the ammonia liquid in the ammonia liquid storage tank is pre-desulfurized to the flue gas after passing through the catheter and the spray head. Since the flue gas has been pretreated, the flue gas will not cause any damage to the subsequent equipment. Larger corrosion prolongs the service life of the equipment; the flue gas after pre-desulfurization treatment is desulfurized by the flue gas desulfurization tower and denitrated by the flue gas denitrification tower, and then enters the SCR reactor. The lower end of the SCR reactor is equipped with a heating device to meet the SCR The process temperature of the catalyst in the reactor makes the denitrification more thorough, the denitrification and desulfurization effects are good, the harmful side reactions are less, the impact on the life of the catalyst is small, the cost of denitration is low, and the purpose of simplifying the process flow is set; It can prevent the flue gas from corroding the flue gas outlet pipe and induced draft fan.

To sum up, the structure design of this new type is reasonable. By adding dust removal and pre-desulfurization measures, the loss of the equipment is lower, and there will be no blockage or large corrosion, so the overall life of the equipment is longer; the denitrification and desulfurization effects Good, less harmful side reactions, little impact on catalyst life, lower denitrification cost, and simplified process flow.

Description of drawings

Figure 1 is a schematic structural diagram of a flue gas desulfurization and denitrification device.

In the figure: 1-flue gas inlet pipe, 2-dust collector, 3-pretreatment pipe, 4-spray head, 5-ammonia liquid storage tank, 6-catheter tube, 7-liquid outlet, 8-flue gas Desulfurization tower, 9-flue gas denitrification tower, 10-SCR reactor, 11-heating device, 12-demister, 13-flue gas outlet pipe, 14-induced fan.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figure 1, a flue gas desulfurization and denitrification device, including a flue gas inlet pipe 1 and a flue gas outlet pipe 13, the right side of the flue gas inlet pipe 1 is connected to a dust collector 2, and the right side of the dust collector 2 passes through the pipeline It is communicated with the pretreatment pipe 3, and the spray head 4 is arranged in the said pretreatment pipe 3, and the said spray head 4 communicates with the ammonia liquid storage tank 5 arranged on the upper end of the pretreatment pipe 3 through the guide pipe 6, so that The lower end of the pretreatment pipe 3 is provided with a liquid outlet 7; the pretreatment pipe 3 communicates with the flue gas desulfurization tower 8 on the right side through a pipe; The tower 9 and the SCR reactor 10 are connected, and the lower end of the SCR reactor 10 is provided with a heating device 11; the right side of the SCR reactor 10 is provided with a flue gas outlet pipe 13, and the right end of the flue gas outlet pipe 13 is provided with an induced draft fan 14. The left end of the flue gas outlet pipe 13 is provided with a demister 12 .

The working principle of the utility model is as follows: set the dust collector 2, the dust collector 2 is a cyclone separator, the dust removal effect is good, avoid the situation of pipeline blockage in the long-term use of the new model, set the pretreatment pipe 3, and the flue gas after dust removal enters The ammonia liquid in the pretreatment pipe 3 and the ammonia liquid storage tank 5 passes through the guide pipe 6 and the spray head 4 to perform pre-desulfurization treatment on the flue gas. Since the flue gas has been pretreated, the flue gas will not cause damage to the subsequent equipment. Larger corrosion prolongs the service life of the equipment; the flue gas after pre-desulfurization treatment is desulfurized by the flue gas desulfurization tower 8 and denitrated by the flue gas denitrification tower 9, and then enters the SCR reactor 10, and the lower end of the SCR reactor 10 is equipped with a heating The device meets the process temperature of the catalyst in the SCR reactor 10, so that the denitrification is more thorough, the denitration and desulfurization effects are good, the harmful side reactions are less, the impact on the life of the catalyst is small, the cost of denitrification is low, and the purpose of simplifying the process flow; set the mist eliminator 12. The mist eliminator 12 can prevent the flue gas from corroding the flue gas outlet pipe 13 and the induced draft fan 14.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (4)

1. a flue gas desulfurization and denitrification device, comprise that flue gas inlet pipe and flue gas go out pipe, it is characterized in that, described flue gas inlet pipe right side is connected with deduster, described deduster right side is communicated with pretreated tube by pipeline, in described pretreated tube, be provided with spray head, described spray head is connected with the ammoniacal liquor storage tank that is arranged at pretreated tube upper end by catheter, and described pretreated tube lower end is provided with leakage fluid dram; Described pretreated tube is connected with the fume desulfurizing tower on its right side by pipeline; Described fume desulfurizing tower is communicated with denitrating flue gas tower and the SCR reactor on its right side successively by pipeline, and described SCR reactor lower end is provided with heater; Described SCR reactor right side is provided with flue gas and goes out pipe, and described flue gas goes out pipe right-hand member and is provided with air-introduced machine, and described flue gas goes out pipe left end and is provided with demister.

2. flue gas desulfurization and denitrification device according to claim 1, is characterized in that, described deduster is cyclone separator.

3. flue gas desulfurization and denitrification device according to claim 1, is characterized in that, described air-introduced machine is centrifugal type draught fan.

4. flue gas desulfurization and denitrification device according to claim 1, is characterized in that, described fume desulfurizing tower is identical with denitrating flue gas turriform shape.