JPS6261617A - Apparatus for washing exhaust gas - Google Patents

Abstract

PURPOSE:To attain the enhancement of adsorbing efficiency and the simplification of the inner structure of a tower, by a method wherein the main body of either one of washing solution supply piping and a piping support is integrally provided with the other main body. CONSTITUTION:A washing solution flowing through the liquid flow passage 4 of main piping passes through a branched pipe 2 to be sprayed from the spray nozzle 9 provided to the leading end of said branched pipe 2. At this time, because the main piping 1 is formed by the main body of a piping support 8, said main piping 1 has sufficient strength only by this structure and generates no bending. Because there is no separate piping support, the reduction in the opening area of a gas-liquid contact tower and the jetting direction of the sprayed solution is not obstructed and adsorbing efficiency is enhanced. The inner structure of the tower is also simplified and the economical tower is constituted.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a gas-liquid contact tower, a supply pipe disposed within the gas-liquid contact tower to supply a cleaning liquid, and a gas-liquid contact tower provided in the supply pipe. The present invention relates to an exhaust gas cleaning device that includes a spray nozzle and a piping support that supports supply piping.

[Prior art]

For example, in a gas-liquid contact tower of a wet desulfurization apparatus, multiple stages of supply pipes are usually installed for supplying a cleaning liquid in order to absorb and remove SO from the inflowing exhaust gas. The prior art of this piping and support structure will be explained with reference to FIGS. 6 to 8.

As shown in the figure, the cleaning liquid supply pipe 11 is composed of a main pipe 1, a branch pipe 2, and a spray nozzle 9. Since the internal fluid in each pipe 1.2 is a ρr slurry liquid, the flow velocity inside the pipe should be maintained at an appropriate flow velocity value at any position vc, taking into account the prevention of solid content deposition and wear of the pipe material at high flow velocity. It is formed by sequentially changing the tube diameter.

On the other hand, as a support structure for the supply pipe 11, it is common to install a pipe support (8t) made of steel, etc., and to fix the branch pipe 2 thereto. To explain the operation, the colored cleaning liquid flowing through the supply pipe lt is transferred to the spray nozzle 9.
80. Gas absorbs gold.

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional structure, the branch pipe 2 is just a liquid flow path and is supported by the piping support 8, which has the following drawbacks.

(1) Piping supports 8 are required both vertically and horizontally throughout the interior of the gas-liquid contact tower 5 (FIG. 8), and the opening area of the cross section of the gas-liquid contact tower 5 is reduced by the piping supports 8.

(2+ When the diameter of the gas-liquid contact tower 5 increases due to the increase in capacity, the diameter of the branch pipe 2 increases due to the increase in the amount of liquid supplied, and the load on the piping support 8 increases accordingly. The support span of the piping support 8 becomes longer, and the piping support 8 itself becomes larger.For this reason, the configuration height of each stage, that is, (pipe diameter) + (beam height) increases, and the appropriate spray characteristics determined from the spray characteristics are increased. The row spacing cannot be maintained.

(3) As shown in FIG. 7, the increase in beam height prevents the dispersion of the cleaning liquid sprayed from the spray nozzle 9, which reduces the effective cross section of the gas-liquid contact tower 5 and also reduces the performance of the cough tower 5. This is not desirable as it may cause

As another conventional example, a structural bolt has been proposed in which each pipe is connected with a web material and supported by a truss structure (Utility Model No. 58
However, even with this structure, members connecting each stage are required, and the spray limit cannot all be set to S. In addition, in order to achieve this truss configuration, the pipes connecting the upper and lower parts must be arranged on the same longitudinal section, and the insertion angle of the main pipe l at each stage is changed by 90' to adjust the angle of the spray nozzle 9. It is difficult to make the arrangement completely staggered.

The purpose of the present invention is to prevent the reduction in the opening area of the gas-liquid contact tower 5 and the deterioration of SO absorption performance due to piping sabot (8), and to clean the exhaust gas by arbitrarily setting the arrangement of the upper and lower piping. Provide the equipment.

[0 Means and Effects for Solving the Problems] The present invention provides the function of piping support to the supply piping itself by attaching one main body to the main body of either one of the cleaning liquid supply piping and the piping support. Or, the piping support itself can also have the function of supply piping.

〔Example〕

An embodiment of the present invention will be described below, taking as an example a spray pipe in an absorption tower used in a desulfurization device. As shown in FIG. 5, in the desulfurization equipment, the exhaust gas containing SO3 is cooled in the cooling tower 6, and then comes into gas-liquid contact with the cleaning liquid supplied through the circulation pipe 7 in the gas-liquid contact tower 5. 803 minutes in the exhaust gas is absorbed and removed. In this gas-liquid contact tower 5, a plurality of supply pipes 11 are normally installed in the number of stages necessary for SO and absorption, and in order to form a uniform liquid film, spray nozzles 9 are installed as shown in FIG. are arranged on the entire surface inside the gas-liquid contact tower 5.

Due to the above-mentioned reason, the main pipe 1 and branch pipes 2 in paper type 5 are made gradually smaller toward the tip of the pipe diameter 1 in accordance with the flow rate in order to maintain the flow velocity in the pipe at an appropriate value. Due to this structure, the conventional piping alone is weak in strength in terms of stress and deflection, and a structure for supporting the supply piping 11 is required.

In the present invention, as shown in FIGS. 1 and 2, by making the piping support 8 itself function as the liquid flow path 4 of the main piping 1, as shown in FIG. This eliminates the need for separate support. This structure also eliminates the areas where slurry cannot be sprayed by the conventional piping support 8 (FIG. 7) K. The main pipe 1 in Fig. 1 is made of H-beam steel with two webs.
Its strength is sufficient without changing within the gas-liquid contact tower 5. Further, although the cleaning liquid flows between the two Kuep materials, a partition plate 10 is provided as appropriate to prevent clogging by slurry due to the extremely rectangular cross section. The branch pipes 2 are formed to protrude left and right from the main pipe 1, and a spray nozzle 9 is attached to this light layer.

Next, the operation of the above embodiment will be explained in 4. The cleaning liquid flowing through the liquid flow path 4 of the main pipe 1 passes through the branch pipe 2 and is sprayed from the spray nozzle 9. When ζ, the main pipe 1 is formed by the main body of the pipe support 80, so it has sufficient strength and will not bend. Further, by adjusting the distance between the Kuep materials and using the partition plate 10, it is possible to obtain an appropriate liquid flow rate. In addition, in this embodiment, since the structure of the attachment of the extension part of the branch pipe 2 is a flat plate on the main pipe 1 side, the drilling work and the connection welding work of the branch pipe 2 are similar to those in the case of two circular pipes. In addition, regarding the structural reliability of this structure, stress generated in each flange material and web material due to hydraulic pressure, and longitudinal Since the stresses acting in the directions are perpendicular to each other and do not overlap, no extra stress acts and there is no problem.

FIG. 4 is a perspective view of essential parts showing another embodiment of the present invention. In this structure, a reinforcing material, that is, a pipe support 8, is attached to the conventional main pipe 1 to compensate for the lack of strength]
So, based on the composite cross-sectional performance of main pipe l and pipe support 8,
It supports the load. According to this embodiment, only the supporting capacity can be improved without changing the conventional piping structure.

〔Effect of the invention〕

According to the present invention, since there is no separate piping support, it is possible to prevent the opening area of the gas-liquid contact tower from decreasing, and as is clear from the comparison between Fig. 2 and Fig. 7, the injection direction of the spray liquid is limited. A uniform liquid film can be formed over the entire area inside the gas-liquid contact tower. This increases the effective cross section of the gas-liquid contact tower and improves absorption efficiency.

In addition, because the height of 6 pipes is now the height of only the main pipe, the stage interval between branch pipes can be shortened even in large towers, and the height can be reduced accordingly as the gas-liquid contact tower becomes larger. Can be done.

On the other hand, the removal of traditional piping supports can simplify the internal structure of the tower and provide a very economical tower.

The problem of the directionality of the main piping, which was a problem in the case of the above-mentioned truss structure, can also be solved in the present invention because each piping is established independently, so that it can be arranged arbitrarily, and optimal spray arrangement is possible.

Further, in the present invention, since the upper surfaces of the main pipe and the pipe support 8 are made flat, they can be used as a work scaffold during maintenance, and there is no need to install a scaffold. It can also be used as part of the scaffolding, making it a convenient structure for maintenance work.

[Brief explanation of the drawing]

FIG. 1 is a VIs perspective view showing one embodiment of the present invention, showing the structure of the main piping in the gas-liquid contact tower, FIG. 2 is a sectional view of the main piping in FIG. The figure shows a plan view of the main parts of the gas-liquid contact tower when the piping shown in Fig. 1 is used, and Fig. 4 shows the
FIG. 5 is a perspective view of main parts showing another embodiment of the present invention, FIG. 5 is a schematic flow diagram of the gas-liquid contact tower of the wet desulfurization equipment, and FIG. 6 is a cleaning liquid supply pipe in the gas-liquid contact tower. 7 is a block diagram showing the vicinity of the spray nozzle in FIG. 6, and FIG. 8 is a plan view of the piping shown in FIG. 6. 5... Gas-liquid contact tower, 8... Piping support, 9
... Spray nozzle, 11... Supply piping.

Claims (1)

[Claims] In an exhaust gas cleaning device consisting of a gas-liquid contact tower, a supply pipe arranged in the gas-liquid contact tower to supply a cleaning liquid, a spray nozzle provided in the supply pipe, and a pipe support that supports the supply pipe, An exhaust gas cleaning device characterized in that the main body of one of the supply piping and the piping support is integrally attached to the other main body.