Desulfurization device for coke oven gas combustion tail gas

Abstract

The utility model relates to a desulfurization device for coke oven gas combustion tail gas, aims to solve the technical problem of poor desulfurization effect of coke oven tail gas, and adopts the technical scheme that the desulfurization device comprises a primary desulfurization device and a secondary desulfurization device, the primary desulfurization device comprises a first circulating pipe, a first pipeline pump, a first regulating valve and a self-rotating spray head, the lower end of the first circulating pipe extends below the alkali liquor level in the tank body, the other end of the first circulating pipe extends above the alkali liquor level of the tank body, the first pipeline pump and the first regulating valve are arranged on the first circulating pipe, and the self-rotating spray head is arranged at the bottom of the first circulating pipe; the secondary desulfurization device comprises a second circulating pipe, a second pipeline pump, a second regulating valve, a coil pipe and a nozzle, the lower end of the second circulating pipe extends below the alkali liquor level in the tank body, the other end of the second circulating pipe extends into the top of the tank body, the second pipeline pump and the second regulating valve are arranged on the second circulating pipe, one end of the coil pipe is connected with the second circulating pipe, and the nozzle is arranged at the bottom of the coil pipe. Through multi-stage desulfurization, tail gas is in full contact with alkali liquor, and the desulfurization effect is better.

Description

TECHNICAL FIELD

[0001] The utility model belongs to coke oven tail gas treatment equipment technical field, concretely relates to a coke oven gas combustion tail gas desulfurization device. BACKGROUND

[0002] The coke oven tail gas contains sulfur dioxide, sulfur trioxide and various dust substances, and directly discharging into the air will cause serious pollution to the atmospheric environment. Therefore, the coke oven tail gas must be treated, especially desulfurization, before being discharged into the air.

[0003] The existing coke oven tail gas desulfurization is mainly carried out in a desulfurization tower, and the tail gas and the desulfurization liquid cannot be fully contacted, so that harmful substances such as sulfur remain in the tail gas after desulfurization. In addition, the desulfurization tower is not only large in size, but also as a separate process step, one more process increases the production cost and time. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the above problems, and provides a coke oven gas combustion tail gas desulfurization device.

[0005] To solve the technical problem, the utility model adopts the technical scheme of:

[0006] A kind of desulfurization device for coke oven gas combustion tail gas, alkali solution for desulfurization is stored in liquid storage tank, alkali solution does not fill liquid storage tank, gas inlet pipe extends to alkali solution surface through the top of liquid storage tank, one end of exhaust pipe passes through the top of liquid storage tank and is located at the top, the other end extends outward and is connected with fan;

[0007] Including primary desulfurization device and secondary desulfurization device;

[0008] The primary desulfurization device includes first circulation pipe, first pipeline pump, first regulating valve and a plurality of self-rotating nozzles, the lower end of the first circulation pipe extends into the tank body below the alkali solution surface through the lower part of the side wall of the liquid storage tank, and the other end extends into the tank body above the alkali solution surface through the middle part of the side wall of the liquid storage tank, the first pipeline pump and the first regulating valve are arranged on the first circulation pipe outside the tank body, and the plurality of self-rotating nozzles are evenly arranged on the bottom of the first circulation pipe above the alkali solution surface in the tank body;

[0009] The secondary desulfurization device includes second circulation pipe, second pipeline pump, second regulating valve, coil pipe and a plurality of nozzles, the lower end of the second circulation pipe extends into the tank body below the alkali solution surface through the lower part of the side wall on the other side of the liquid storage tank, and the other end of the second circulation pipe extends into the tank body through the upper part of the side wall of the liquid storage tank and is located close to the top, the second pipeline pump and the second regulating valve are arranged on the second circulation pipe outside the tank body, the coil pipe is located at the top of the liquid storage tank, one end is connected with the upper end of the second circulation pipe, and the other end is blocked, and the plurality of nozzles are evenly arranged on the bottom of the coil pipe.

[0010] Further, the nozzles are symmetrically arranged on both sides of the bottom surface of the coil pipe.

[0011] Further, a window is arranged in the middle of the sidewall of the liquid storage tank.

[0012] Compared with the prior art, the present application has the following advantages:

[0013] 1. The first and second desulfurization devices are arranged, and the tail gas sequentially passes through the spiral curtain-shaped alkali liquid sprayed by the self-rotating nozzle and the mist-shaped alkali liquid sprayed by the nozzle, so that the tail gas can be fully contacted with the alkali liquid, the desulfurization effect is better, and the environmental protection is facilitated.

[0014] 2. The alkali liquid in the liquid storage tank can be recycled, and the cost is saved.

[0015] 3. The present application can be realized by modifying the liquid storage tank, without the need for additional desulfurization tower, simplifying the processing technology, and further reducing the production cost.

[0016] 4. The adjusting valve is arranged on the circulating pipeline, and the spraying intensity of the alkali liquid can be adjusted according to the inlet and outlet concentrations of the tail gas. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of the present application;

[0018] Figure 2 is a structural schematic view of the present application;

[0019] Figure 3 is a structural schematic view of the present application;

[0020] Figure 4 is a structural schematic view of the present application;

[0021] In the figure: 1, liquid storage tank; 2, first circulating pipe; 3, first pipe pump; 4, first adjusting valve; 5, self-rotating nozzle; 6, second circulating pipe; 7, second pipe pump; 8, second adjusting valve; 9, coil pipe; 10, nozzle; 11, air inlet pipe; 12, exhaust pipe; 13, fan; 14, window. DETAILED DESCRIPTION

[0022] The present application will be further described below with reference to the accompanying drawings. EMBODIMENT

[0023] As Figures 1-4The utility model discloses a coke oven gas combustion tail gas desulfurization device, the alkali solution for desulfurization is stored in the liquid storage tank 1, and the alkali solution does not fill the liquid storage tank 1, the gas inlet pipe 11 extends to the alkali solution surface through the liquid storage tank 1 top filling, and the exhaust pipe 12 one end passes through the liquid storage tank 1 top filling and is located at top filling, and the other end extends outward and is connected with the fan 13, and the side wall middle part of the tank body of the liquid storage tank 1 is equipped with the window 14,

[0024] It comprises a primary desulfurization device and a secondary desulfurization device;

[0025] The primary desulfurization device comprises a first circulating pipe 2, a first pipeline pump 3, a first regulating valve 4 and a plurality of self-rotating nozzles 5, the lower end of the first circulating pipe 2 extends into the tank body below the alkali solution surface through the lower part of the side wall of the liquid storage tank 1, and the other end extends into the tank body above the alkali solution surface through the middle part of the side wall of the liquid storage tank 1, the first pipeline pump 3 and the first regulating valve 4 are arranged on the first circulating pipe 2 outside the tank body of the liquid storage tank 1, and the plurality of self-rotating nozzles 5 are uniformly arranged on the bottom of the first circulating pipe 2 above the alkali solution surface in the tank body;

[0026] The secondary desulfurization device comprises a second circulating pipe 6, a second pipeline pump 7, a second regulating valve 8, a coil pipe 9 and a plurality of nozzles 10, the lower end of the second circulating pipe 6 extends into the tank body below the alkali solution surface through the lower part of the other side wall of the liquid storage tank 1, and the other end of the second circulating pipe 6 extends into the tank body through the upper part of the side wall of the liquid storage tank 1 and is located close to the top filling, the second pipeline pump 7 and the second regulating valve 8 are arranged on the second circulating pipe 6 outside the tank body of the liquid storage tank 1, the coil pipe 9 is located at the top filling in the liquid storage tank 1, one end is connected with the upper end of the second circulating pipe 6, and the other end is blocked, and the plurality of nozzles 10 are uniformly arranged on the bottom of the coil pipe 9 on both sides.

[0027] The working process of the utility model is as follows:

[0028] When the utility model is used, the first regulating valve 4 and the second regulating valve 8 are opened, the first pipeline pump 3 and the second pipeline pump 7 are started, the alkali solution flows upwards along the first circulating pipe 2, is scattered from the plurality of self-rotating nozzles 5, and the alkali solution sprayed from the self-rotating nozzles 5 is in spiral curtain shape, meanwhile, the alkali solution flows upwards along the second circulating pipe 6, enters the coil pipe 9, and is sprayed in mist shape from the bottom nozzle 10;

[0029] At this time, the tail gas after coke oven gas combustion enters the tank body from the gas inlet pipe 11, after being sprayed from the pipe orifice of the gas inlet pipe 11, first contacts the alkali solution surface, carries out primary desulfurization, then rises through the spiral curtain shape alkali solution sprayed from the self-rotating nozzles 5, carries out secondary desulfurization, after secondary desulfurization, the gas continues to rise, contacts the mist shape alkali solution sprayed from the nozzle 10, carries out third desulfurization, and the spiral curtain shape alkali solution and the mist shape alkali solution can fully contact the tail gas, so that desulfurization is complete, and finally the tail gas after desulfurization is discharged along the exhaust pipe 12.

Claims

1. A coke oven gas combustion tail gas desulfurization device, a liquid storage tank (1) stores lye for desulfurization, the lye does not fill the liquid storage tank (1), a gas inlet pipe (11) extends to the lye surface through the top of the liquid storage tank (1), and an exhaust pipe (12) extends outward and is connected to a fan (13) at one end. characterized in that It comprises a primary desulfurization device and a secondary desulfurization device. The primary desulfurization device comprises a first circulating pipe (2), a first pipeline pump (3), a first regulating valve (4) and a plurality of self-rotating nozzles (5), the lower end of the first circulating pipe (2) extends into the tank below the lye surface through the lower part of the side wall of the liquid storage tank (1), and the other end extends into the tank above the lye surface through the middle part of the side wall of the liquid storage tank (1), the first pipeline pump (3) and the first regulating valve (4) are arranged on the first circulating pipe (2) outside the tank body of the liquid storage tank (1), and the plurality of self-rotating nozzles (5) are evenly arranged at the bottom of the first circulating pipe (2) above the lye surface in the tank body. The secondary desulfurization device comprises a second circulating pipe (6), a second pipeline pump (7), a second regulating valve (8), a coil pipe (9) and a plurality of nozzles (10), the lower end of the second circulating pipe (6) extends into the tank below the lye surface through the lower part of the side wall on the other side of the liquid storage tank (1), and the other end of the second circulating pipe (6) extends into the tank near the top of the liquid storage tank (1), the second pipeline pump (7) and the second regulating valve (8) are arranged on the second circulating pipe (6) outside the tank body of the liquid storage tank (1), the coil pipe (9) is located at the top of the liquid storage tank (1), one end is connected to the upper end of the second circulating pipe (6), and the other end is blocked, and the plurality of nozzles (10) are evenly arranged at the bottom of the coil pipe (9).

2. A coke oven gas combustion off-gas desulfurization device according to claim 1, characterized in that, The nozzles (10) are symmetrically arranged on both sides of the bottom surface of the coil pipe (9).

3. A coke oven gas combustion off-gas desulfurization device according to claim 1, characterized in that, The middle part of the side wall of the tank body of the liquid storage tank (1) is provided with a window (14).

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