CN104140841A - An ethylene cracking furnace - Google Patents

Abstract

An ethylene cracking furnace is disclosed. The ethylene cracking furnace comprises radiation chambers, convection chambers, quenching boilers, a flue and a blower fan. The convection chambers are disposed on the radiation chambers. The flue and the blower fan are disposed on the convection chambers in sequence. The radiation chambers are provided with radiation coil pipes. The convection chambers are provided with convection coil pipes. The length direction of the convection coil pipes is perpendicular to the arrangement direction of the radiation coil pipes. The ethylene cracking furnace can effectively overcome the problems of the present cracking furnaces, namely limited production capability, long furnace pipe length in the convection section, large-scale equipment, and complex design for a pipe stretching across the convection chambers and the radiation chambers.

Description

A kind of ethane cracking furnace

Technical field

The present invention relates to cracking of ethylene field, furtherly, relate to a kind of ethane cracking furnace.

Background technology

Ethane cracking furnace is mainly divided into box-type furnace and the twin furnace door type box-type furnace of single burner hearth, and wherein the box-type furnace of single burner hearth only has a radiation chamber, and twin furnace door type box-type furnace has two radiation chambers.Box-type furnace and the twin furnace door type box-type furnace of single burner hearth all only have a convection chamber, and convection chamber bearing of trend and radiation chamber are in the same way, the length of heating tube in section of convection chamber and radiation chamber length match, and can only increase the occupation of land of pyrolyzer and need equipment enlarging to adapt to it while so just causing increasing pyrolyzer throughput.Due to convection chamber and radiation chamber be arranged in parallel and quenching boiler is arranged in the length direction of convection chamber, therefore cause arranging relative complex across pipe from convection chamber to radiation chamber.

The typical pyrolyzer of prior art as shown in Figure 1, comprising: radiation chamber 10, convection chamber 20, transition section 14 and a smoke collection cover, fume exhaust system 50.Convection chamber center line 200 is parallel with radiation chamber center line 100 and bearing of trend is identical.In burner hearth, flue gas is finally discharged from smoke collection cover, fume exhaust system 50 from radiation chamber 10, transition section 14, convection chamber 20.Material is connected and finally enters quenching boiler 13 with radiant coil 11 across pipe 3 from convection current coil pipe 21 warps.

In sum, because body of heater configuration and expand can demand, existing pyrolyzer has that throughput is limited, heating tube in section of convection chamber length is long, equipment enlarging and convection chamber to radiation chamber across shortcomings such as pipe design complexity.

Summary of the invention

For solving problems of the prior art, the invention provides a kind of ethane cracking furnace, can effectively solve that existing pyrolyzer throughput is limited, heating tube in section of convection chamber length is long, equipment enlarging and convection chamber design complicated problem to radiation chamber across pipe.

The object of this invention is to provide a kind of ethane cracking furnace.

Comprise: radiation chamber, convection chamber, quenching boiler, flue and blower fan, convection chamber is arranged on above radiation chamber, sets gradually flue and blower fan above convection chamber, and radiant coil is set in radiation chamber, and convection current coil pipe is set in convection chamber,

The length direction of described convection current coil pipe is vertical with the orientation of radiant coil.

Many group radiant coil are set in radiation chamber conventionally, and the common vertical hanging of radiant coil is in radiation chamber, and along the arrangement of radiation chamber center line, the length direction of convection current coil pipe of the present invention is vertical with the orientation of radiant coil.

Described convection current coil pipe is by being connected with radiant coil across pipe pipe nipple.Be preferably right angle pipeline or π type loop expansion pipe pipeline across pipe pipe nipple.

Described quenching boiler can be arranged on convection chamber headwall outside or convection chamber side wall outside, is preferably arranged on the convection chamber center line extended line in convection chamber headwall outside.

The quantity of described radiation chamber is one or two; The quantity of described convection chamber is not more than 5;

The quantity of described flue is less than or equal to the quantity of convection chamber; The quantity of described blower fan is consistent with flue quantity.

Described radiant coil vertical hanging is arranged in radiation chamber and along radiation chamber center line; Described convection current coil pipe is arranged along convection chamber center line level.

Specifically can be by the following technical solutions:

Pyrolyzer has the individual radiation chamber of n (n≤2) and the individual convection chamber of m (m≤5); In each radiation chamber, be provided with many group radiant coil, radiant coil is arranged along radiation chamber center line direction, convection current coil pipe is set in each convection chamber, convection current coil pipe is arranged along convection chamber center line level, the length direction of convection current coil pipe is vertical with the orientation of radiant coil, the arragement direction that is convection current coil pipe and radiant coil is arranged at an angle of 90, and makes convection chamber become spatial vertical state with radiation chamber, and in burner hearth, flue gas directly enters convection chamber from radiation chamber; Pass through from convection current coil pipe to radiant coil to connect across pipe pipe nipple; Quenching boiler is in convection chamber headwall outside, and can on convection chamber center line extended line, arrange also and can between two-phase neighbour convection chamber side wall, arrange; Flue is arranged on the top of convection chamber, and flue can be the corresponding p(p of the individual convection chamber of m (m≤5)≤m) individual flue with the corresponding relation of convection chamber; Flue and blower fan are corresponding one by one.

Ethane cracking furnace of the present invention as shown in Figure 2, comprising: two radiation chambers, three convection chambers, a flue and a blower fan.Convection chamber center line and radiation chamber center line spatial vertical.In burner hearth, flue gas enters three stream chambers is finally discharged from flue and blower fan from two radiation chambers.Material is connected and finally enters quenching boiler with radiant coil across pipe pipe nipple from convection current coil pipe warp.Quenching boiler is in convection zone headwall outside layout and on convection chamber center line extended line.Three corresponding flues of convection chamber.

As shown in Figure 3, quenching boiler is arranged in outside convection zone headwall and on convection chamber center line extended line.

As shown in Figure 4, quenching boiler is arranged in outside convection zone headwall and between convection chamber side wall.

As shown in Figure 5, quenching boiler is arranged in convection zone headwall outside and in a row arranges.

As shown in Fig. 6,7,8, can be ell and π type loop expansion pipe pipeline across pipe pipe nipple.

The set-up mode that has adopted just " length direction of convection current coil pipe is vertical with the orientation of radiant coil ", ethane cracking furnace tool of the present invention has the following advantages:

(1), can save take up an area in increase pyrolyzer ability as much as possible, thereby increase pyrolyzer throughput, remarkable in economical benefits;

(2), convection chamber and radiation chamber be arranged vertically, convection chamber is to arrange according to the width of radiation chamber, therefore the length of single convection zone just reduces greatly, the equipment that routinizes just can meet Production requirement;

(3), pass through from convection current coil pipe to radiant coil, across the connection of pipe pipe nipple, to have simplified across pipe design.

Brief description of the drawings

Fig. 1 prior art pyrolyzer schematic diagram

Fig. 2 pyrolyzer schematic diagram of the present invention

Fig. 3 quenching boiler location arrangements Fig. 1

Fig. 4 quenching boiler location arrangements Fig. 2

Fig. 5 quenching boiler location arrangements Fig. 3

Fig. 6 is across pipe pipe nipple schematic diagram-across ell

Fig. 7 is across pipe pipe nipple schematic diagram-across π pipe 1

Fig. 8 is across pipe pipe nipple schematic diagram-across π pipe 2

Description of reference numerals:

10 – radiation chambers; 11 – radiant coil; 12 – are across pipe pipe nipple; 13 – quenching boilers; 14 – transition sections; 15 – are across pipe; 20 – convection chambers; 21 – convection current coil pipes; 22 – convection chamber headwalls; 23 – convection chamber side walls; 30 – flues; 40 – blower fans; 50 – smoke collection covers, fume exhaust system; 100 – radiation chamber center lines; 200 – convection chamber center lines.

Embodiment

Below in conjunction with embodiment, further illustrate the present invention.

Embodiment:

As shown in Figure 2, a kind of ethane cracking furnace, comprise: two radiation chambers 10, three convection chambers 20, quenching boiler 13, flue 30 and a blower fan 40, convection chamber 20 is arranged on above radiation chamber 10, convection chamber 20 sets gradually flue 30 and blower fan 40 above, the interior radiant coil 11 that arranges of radiation chamber 10, the interior convection current coil pipe 21 that arranges of convection chamber 20

Described radiant coil 11 vertical hangings are arranged in radiation chamber 10 and along radiation chamber center line 100; Described convection current coil pipe 21 is arranged along convection chamber center line 200 levels, and the length direction of convection current coil pipe 21 is vertical with the orientation of radiant coil 11.

Described convection current coil pipe 21 is by being connected with radiant coil 11 across pipe pipe nipple 12.Be right angle pipeline across pipe pipe nipple 12.

Quenching boiler 13 is arranged in convection zone headwall 22 outsides and on convection chamber center line 200 extended lines.

Like this arrange pyrolyzer, can save take up an area in increase pyrolyzer ability as much as possible; Convection chamber is arranged according to the width of radiation chamber, and therefore the length of single convection zone just reduces greatly, has reduced device fabrication difficulty, has effectively avoided equipment enlarging problem simultaneously; , simplify across pipe design by connecting across pipe pipe nipple from convection current coil pipe to radiant coil.

Claims (8)

1. an ethane cracking furnace, comprising: radiation chamber, convection chamber, quenching boiler, flue and blower fan, and convection chamber is arranged on above radiation chamber, above convection chamber, set gradually flue and blower fan, radiant coil is set in radiation chamber, convection current coil pipe is set in convection chamber, it is characterized in that:

The length direction of described convection current coil pipe is vertical with the orientation of radiant coil.

2. ethane cracking furnace as claimed in claim 1, is characterized in that:

Described convection current coil pipe is by being connected with radiant coil across pipe pipe nipple.

3. ethane cracking furnace as claimed in claim 2, is characterized in that:

Described is right angle pipeline or π type loop expansion pipe pipeline across pipe pipe nipple.

4. ethane cracking furnace as claimed in claim 1, is characterized in that:

Described quenching boiler is arranged on convection chamber headwall outside or convection chamber side wall outside.

5. ethane cracking furnace as claimed in claim 4, is characterized in that:

Described quenching boiler is arranged on the convection chamber center line extended line in convection chamber headwall outside.

6. the ethane cracking furnace as described in one of claim 1～5, is characterized in that:

The quantity of described radiation chamber is one or two; The quantity of described convection chamber is not more than 5.

7. ethane cracking furnace as claimed in claim 6, is characterized in that:

The quantity of described flue is less than or equal to the quantity of convection chamber; The quantity of described blower fan is consistent with flue quantity.

8. ethane cracking furnace as claimed in claim 6, is characterized in that:

Described radiant coil vertical hanging is arranged in radiation chamber and along radiation chamber center line; Described convection current coil pipe is arranged along convection chamber center line level.