CN203816462U - Absorption tower for preventing backflow of smoke - Google Patents

Abstract

The utility model relates to an absorption tower for preventing backflow of smoke. The absorption tower comprises an absorption tower body, a slurry storing section, an absorbent circulating pipeline, an absorption tower return pipeline interface, a smoke inlet and a smoke outlet, wherein an absorption tower slurry header device communicated with the slurry storing section is arranged outside the absorption tower body and comprises a header device body, a return slurry pipeline interface, an exhausting hole and a slurry discharging pipeline interface. According to the absorption tower, by arranging the absorption tower slurry header device, the smoke in the absorption tower can be effectively prevented from backwards flowing into a slurry return pipeline, so that the problem of leakage of pollutants in the absorption tower is avoided; furthermore, the cost of the absorption tower is low, the production cost of equipment is lowered, the operation is convenient, faults are not prone to occur, and the absorption tower can be widely applied to the desulfurization of the smoke.

Description

A kind of absorption tower that stops flue gas to pour in down a chimney

Technical field

The utility model belongs to environmental technology field, relates to fume desulfurating absorption tower, especially a kind of absorption tower that stops flue gas to pour in down a chimney.

Background technology

In atmosphere pollution, administer flue gas desulfurization field, absorption tower, as nucleus equipment, is widely used in Wet Flue Gas Desulfurization Technology.Absorption tower bottom storage has desulfurization slurry, and the reaction zone that top is flue gas, has been full of flue gas, and operating pressure is 2.0-3.0kPa.In desulphurization system, there are several pipelines that reclaim slurries will return to absorption tower, to meet the requirement to water circulation use in system.Like this, on absorption tower, will have several slurries return ports.The period that slurries return port on absorption tower is stopped transport in intermittence, is emptying slurries, and this just causes the situation that flue gas pours in down a chimney to occur.Because absorption tower is operation under positive pressure equipment, gas phase operation gauge pressure is about 2.0-3.0kPa, when return line is out of service, owing to no longer storing slurries in pipeline, flue gas in tower can reflux with pipeline, by the equipment being connected with pipeline, flow out outside desulphurization system, cause the leakage of pollutant in flue gas.

In the development of desulfur technology, designer has improved this reflux type, takes the mode with under shed in liquid level.Slurry reflux pipe is entered to the interface on absorption tower, be arranged on below the liquid level of absorption tower prime cement liquid, rely on the static pressure of slurries, stop gas in tower to reserve.But also there is operating problem in the method: due to slurry pipe Louis deposition, therefore when stopping transport, need blowdown piping, this kind of method, when emptying return line, siphonage can occur, by tower higher than the whole sucking-offs of slurries of interface, cause operation difficulty.

For this problem, designer enters absorption tower interface at slurry reflux Guan Yuqi and valve is set isolates, and venting valve is set on pipeline, for emptying liquid in pipe.

This kind of method can solve the problem that flue gas pours in down a chimney, but because valve installation position is higher, for easy to operate, this part valve need be designed to electrically operated valve or operated pneumatic valve, this kind of valve cost is higher, and as mentioned before, Shang Youshuo road, every absorption tower return line, this just causes this formula investing larger.

By retrieval, not yet find the patent publication us relevant to the utility model patent application.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art part, a kind of absorption tower that stops flue gas to pour in down a chimney is provided, this device utilizes fluid mechanics principle work, using method is easy, plant investment is low, preferably resolve the problem occurring in the slurry reflux of absorption tower, this absorption tower can be applied to the desulfurization of flue gas.

The purpose of this utility model is achieved through the following technical solutions:

A kind of absorption tower that stops flue gas to pour in down a chimney, described absorption tower comprises absorption tower body, store slurries section, absorbent circulation line, absorption tower return line interface, smoke inlet and exhanst gas outlet, described exhanst gas outlet is communicated on the tower top of absorption tower body or the sidewall on tower top top, described smoke inlet is communicated on the sidewall outside the middle and lower part of absorption tower body, in absorption tower body between exhanst gas outlet and smoke inlet, establish absorbent circulation line, in the absorption tower body of described smoke inlet below, be provided with and store slurries section, this storage slurries section is located at intrinsic bottom, absorption tower, on outer wall below the liquid level of this absorption tower body, be communicated with and be provided with several absorption towers return line interface,

Described absorption tower is originally external to be communicated with an absorption tower slurries header device is set with storage slurries section, described absorption tower slurries header device comprises header device body, backflow slurry pipe line interface, gas vent and grout outlet pipeline joint, the casing shape that described header device body is hollow, sealing, the top of this header device body or top outer wall top arrange one or more backflow slurry pipe line interfaces; The bottom of this header device body or bottom outside wall are communicated with absorption tower body one or more grout outlet pipeline joints are set; The top of this header device body or top outer wall top arrange a gas vent; The backflow slurry pipe line interface of described header device is located at the operation liquid level top of absorption tower body, and the grout outlet pipeline joint of this header device is located at the operation liquid level below of absorption tower body.

And described absorption tower body is vertical reaction tower.

And described header device body comprises square box, taper connection portion and the bending pipeline that airtight connection arranges successively from top to bottom, the bottom of described bending pipeline arranges pulp pipe joint.

Advantage of the present utility model and good effect are:

The utility model absorption tower is originally external on absorption tower to be communicated with an absorption tower slurries header device is set with storage slurries section, when absorption tower slurries header device quits work, in absorption tower, slurries can flow in header device and tube connector certainly, backflow slurry pipe line interface on header device and exhaust outlet are formed to fluid-tight, thereby this header device can effectively stop the flue gas in absorption tower to pour in down a chimney to slurries return pipeline, thereby avoided the generation of pollutant leakage problem in absorption tower, and this absorption tower is with low cost, reduced the production cost of equipment, operation is convenient, be difficult for breaking down, operation is convenient, can be widely used in the desulfurization of flue gas.

Accompanying drawing explanation

Figure l is the structure connection diagram on the utility model absorption tower;

Fig. 2 is the structure enlarged diagram of slurries header device in absorption tower in Fig. 1;

Fig. 3 be Fig. 2 A-A to cross-sectional view.

The specific embodiment

The utility model is described in further detail as example to take accompanying drawing embodiment below, and following examples are descriptive, are not determinate, can not limit protection domain of the present utility model with this.

A kind of absorption tower that stops flue gas to pour in down a chimney, as shown in Figure 1, described absorption tower comprises absorption tower body 3, stores slurries section 10, absorbent circulation line 2, absorption tower return line interface 8, smoke inlet 11 and exhanst gas outlet 1, described absorption tower body can be conventional in the art desulfuration absorbing tower, can be the absorption tower form of prior art, this absorption tower be vertical reaction tower in the present embodiment;

Described exhanst gas outlet is communicated on the tower top of absorption tower body or the sidewall on tower top top, described smoke inlet is communicated on the sidewall outside the middle and lower part of absorption tower body, in absorption tower body between exhanst gas outlet and smoke inlet, establish absorbent circulation line, this absorbent circulation line is for delivery of absorbing slurries, flue gas enters absorption tower from bottom to top, absorbent circulation absorbs slurries and enters absorption tower from top to bottom, and gas-liquid two-phase reacts in the body of absorption tower; In the absorption tower body of described smoke inlet below, be provided with and store slurries section, this storage slurries section is located at intrinsic bottom, absorption tower, on the outer wall below the operation liquid level 9 of this absorption tower body, is communicated with and is provided with several absorption towers return line interface.

Innovative point of the present utility model is:

Described absorption tower is originally external to be communicated with an absorption tower slurries header device is set with storage slurries section, as shown in Figures 2 and 3, described absorption tower slurries header device comprises header device body 6, backflow slurry pipe line interface 4, gas vent 5 and grout outlet pipeline joint 7, the casing shape that described header device body is hollow, sealing, the top of this header device body or top outer wall top arrange one or more backflow slurry pipe line interfaces, and this backflow slurry pipe line interface needs to transport for connecting desulphurization system the slurries pipeline that returns to absorption tower; The bottom of this header device body or bottom outside wall are communicated with absorption tower body one or more grout outlet pipeline joints are set, and this grout outlet pipeline joint can be connected and be installed together by tube connector with absorption tower return line interface; The top of this header device body or top outer wall top arrange a gas vent.

The backflow slurry pipe line interface of described header device is located at the operation liquid level top of absorption tower body, the grout outlet pipeline joint of this header device is located at the operation liquid level below of absorption tower body, those skilled in the art can carry out this setting height(from bottom) of calculative determination according to returning to absorption tower slurry flow, absorption tower operating pressure, fluid density, header device physical dimension, and this setting height(from bottom) can be calculated as follows:

When header is worked, slurry flow is Q _m, formed inside and outside liquid level difference is Δ h, external and internal pressure is poor is Δ p, according to bernoulli equation, can obtain the working flow rate that can reach under working solution potential difference $v=\sqrt{\frac{2}{1.5}[\mathrm{\Δhg}-(p_1-p_2)/\mathrm{\ρ}]}=1.16\sqrt{(\mathrm{\Δhg}-\mathrm{\Δp}/\mathrm{\ρ})},$

The working flow that can reach under this flow velocity can be by obtain.

In the present embodiment, as shown in Figures 2 and 3, described header device body comprises square box 12, taper connection portion 13 and the bending pipeline 14 that airtight connection arranges successively from top to bottom, and the bottom of described bending pipeline arranges a grout outlet pipeline joint.

The operation principle on the absorption tower that the utility model prevention flue gas pours in down a chimney is as follows:

On the outer wall of the liquid level below on this absorption tower, be communicated with and be provided with several absorption towers return line interface, this external absorption tower slurries header device that is provided with of absorption tower outside the return line interface of absorption tower, the top of this absorption tower slurries header device arranges backflow slurry pipe line interface, be connected with the pipeline of the slurries that need to reflux, the top of this header device arranges gas vent, by this gas vent, can make header device inside be connected with atmosphere; The bottom of this header device arranges pulp pipe joint, and the slurries in header device are flowed in absorption tower.

When absorption tower slurries header device quits work, in absorption tower, slurries can flow in header device certainly, and the backflow slurry pipe line interface on header device and gas vent are formed to fluid-tight, and in maintenance absorption tower, flue gas is unlikely leaks.

When absorption tower slurries header device is worked, the backflow slurry pipe line of desulphurization system is connected on the backflow slurry pipe line interface at header device top, backflow slurries flow into header device inner buffer, the grout outlet pipeline joint of while by the bottom of header device flows into below the operation liquid level in absorption tower, header device is provided with gas vent, be connected with atmosphere, guaranteed that in header device, static pressure is local atmospheric pressure.Because slurries have resistance when header device flows to absorption tower, so the liquid level of the interior slurries of header can be higher than liquid level in absorption tower, differential static pressure that liquid level difference is brought.In header, liquid level reach a certain height, and while reaching liquid level difference Δ h with liquid level in absorption tower, water inlet and water outlet in header device reach balance.

Claims (2)

1. an absorption tower that stops flue gas to pour in down a chimney, described absorption tower comprises absorption tower body, storage slurries section, absorbent circulation

Pipeline, absorption tower return line interface, smoke inlet and exhanst gas outlet, described exhanst gas outlet is communicated in the tower of absorption tower body

On top or the sidewall on tower top top, described smoke inlet is communicated on the sidewall outside the middle and lower part of absorption tower body, at flue gas, goes out

In absorption tower body between mouth and smoke inlet, establish absorbent circulation line, in the absorption tower body of described smoke inlet below, establish

Have the slurries of storage section, this storage slurries section is located at intrinsic bottom, absorption tower, the outer wall below the liquid level of this absorption tower body

Upper connection is provided with several absorption towers return line interface, it is characterized in that:

Described absorption tower is originally external to be communicated with and an absorption tower slurries header device to be set, described absorption tower slurries header with storage slurries section

Device comprises header device body, backflow slurry pipe line interface, gas vent and grout outlet pipeline joint, and described header device body is

The casing shape of hollow, sealing, the top of this header device body or top outer wall top arrange one or more backflow slurry pipes

Road interface; The bottom of this header device body or bottom outside wall are communicated with absorption tower body and one or more pulp pipelines are set connect

Mouthful; The top of this header device body or top outer wall top arrange a gas vent; The backflow slurry pipe line of described header device

Interface is located at the operation liquid level top of absorption tower body, and the grout outlet pipeline joint of this header device is located at the operation liquid of absorption tower body

Below, position.

2. the absorption tower that prevention flue gas according to claim 1 pours in down a chimney, is characterized in that: described absorption tower body is vertical reaction tower.

3. the absorption tower that prevention flue gas according to claim 1 and 2 pours in down a chimney, it is characterized in that: described header device body comprises square box, taper connection portion and the bending pipeline that airtight connection arranges successively from top to bottom, and the bottom of described bending pipeline arranges pulp pipe joint.