201026839 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種乙烯裂解爐。 【先前技術】 在乙烯裝置中，裂解爐是核心設備。 n , w轉射盤管的設計 是決定裂解選擇性、提高裂解產品烯 卞 , 吹率和提高對不同 裂解原料適應性的關鍵。改進輕射盤答^ 的結構和排佈，成 為管式裂解爐技術發展中最核心的部分。 多年來，相繼 出現了單排分支變徑管、混排分支 位管、不分支變徑營 、單程等徑管等不同結構的輕射盤管。 為使原料消耗大大降低、維持適當的運轉週期和具有 較好的原料適應性，目前大多數公司均 Ν 、 -;耗用兩程（18〜28m )分支變徑或兩程變徑高選擇性爐管，將停留時間控 0.15〜0.25s。第一程管採用小直徑爐管，利用它比表面積大 的特點達到快速升溫的目的，第二程管採用較大直㈣爐 管以降低對結焦敏感性的影響。所採用的兩程高選擇 射段爐管有Μ型、2]型、“型…型、61型 等爐管。 您採用4-卜5-卜W等構型的兩程爐管，通常四小組爐 管配一台急冷（廢熱）_ ;爐管採用錯排排列，即第__ 程管單排、第二程管雙排，且第_、第二程爐管採用特殊 的連接管：底平錐型管連接。美國魯姆斯克雷斯特公司在 專利CN106766”公佈了其爐管排佈，其入第一程管為6 根’第二程管為—根’第—程管在下部通過—集合管與第 201026839 二程管連接。此種結構，由於第-程管為多根、第二程管 為-根’在爐管受熱膨脹時，第二程管先向下膨脹第一 程管在第二程管的牵引下向下運動，其中離第二程管遠的 受力較小、靠近第二程管的受力較大，加上下部集合管為 剛性連接，第二程管與第—程管之間的膨脹差只能靠設置 在第-程管入口的平衡系統來調節，這樣的結果是當第一 程管無法隨第二程管運動時，就會造成爐管彎曲。 採用1 H ’通常_小組或兩小組爐管配一台線性 急冷（廢熱）鍋爐’全部底部供熱；爐管通常採用單排， 第一程管底部向外傾斜，然後通過半圓管與垂直的第二程 管底部相連。有兩種排列方式：υ第一第二程管分別集 中佈置。埃克森美孚化學專利公司在CN1259981專利公佈 了-種裂解爐。2)如美國專利US6測27所公開的採用第 -程管與另-組爐管的第二程管相鄰排列。這兩種結構爐 管共同的缺點是由於第_程管下部向外傾斜而第二㈣ 未向相反方向傾斜，同時相鄰的第-程管往另一側傾斜， 其結果是在爐管受熱狀態下，整個輕射爐管不能很好地保 持單排t自然地為消除應力而成為雙排。其結果是爐管 兩側受熱不均、兩側管壁溫度不相等。靠燃燒器側溫度高 而背離側則低，造成爐管向燃燒器側彎曲。 採用2 1型兩程爐管’通常八小組爐管配—台急冷锅爐 ;EP11461G5彡開了這樣的爐管結構排佈的裂解爐：兩程 輕射段爐管垂直排列在輻射段爐聽裡，—程管和二程管的 直管排列在一個平面裡，一程直管和二程管分別通過s形 201026839 管與一個彎管連接，一程管和二程管的s形管分別平行， 連接彎管可以是半圓形、半橢圓形或半卵形，各彎管與直 管所在平面所成角度相同。 採用1-1型爐管，通常一小組或兩小組爐管配一台線性 急冷（廢熱）鋼爐，爐管採用第一、第二程管分別集中佈 置，採用雙排，第一、第二程管之間連接管為9〇度彎管、 水準管，見圖12。 爐管的排列方式從最初的單排發展到雙排，對單排而 ® 言，相同的能力需要更大的占地面積，其優勢是爐管徑向 溫度分佈均勻，存在遮蔽的情況較少；對雙排而言，大大 縮小了裂解爐的占地面積，但遮蔽的狀況比較嚴重，影響 了爐管徑向溫度分佈，而且其第一程、第二程管之間的連 接容易引起爐管的彎曲。 裂解爐輻射爐管結構也由簡單的、柔性較差的彎頭連 接向柔性較好的弯管連接發展。 【發明内容】 ϋ 本發明的目的就是為了克服現有技術中輻射段爐管單 排和雙排的結構及排佈存在著缺陷和不足，提供一種輻射 段爐管新型結構排佈的裂解爐。 本發明的雙排佈置輻射段爐管裂解爐是這樣實現的： 本發明的雙排佈置輻射段爐管裂解爐包括輻射區、燃 燒器、排佈在輻射區内的輻射爐管、對流區、急冷鍋爐和 而壓汽鼓；其特徵在於： 多組轄射爐管排佈在輻射區内，其中每一組輻射爐管 5 201026839 由多個輕射爐管組成； 所述的每-個輻射爐管為兩程立式爐管其第一 為入口管、第二程管為出口管；所述的第—程管和第 管之間採用回彎管連接件連接； 每一組輕射爐管的第一程管的中心線和第二程管的中 心線佈置在平面A和平面B中’每一個輕射爐管的第—程 管和第二程管分別處於所述的平面A和B内；該組輕射爐 管中的每-個輕射爐管的回彎管連接件的對稱中心線均處 於-個錯垂平面内，該平面稱為平面c，所述的平面A和 平面B與平面C平行’平面A和平面B分別對稱分佈於平❹ 面C兩侧； 所述的每一個回彎管連接件為一立體結構件，以平面c 為對稱面，其側視投影為一對稱的曲線，其俯視投影為長 度相同的直線段；所述的同一組輻射爐管中各個輻射爐管 的回彎管連接件分上下兩層交又排佈，每層回彎管平行地 排佈。 在本發明的一種優選實施方式中，上述的回彎管連接❹ 件可以為弧形、半圓形、半橢圓形、抛物線形或倒Ω連接 件’其中倒Ω為所述的弧形、半圓形、半橢圓形、抛物線 形連接件與S型彎管組合而成。 在本發明的一種優選實施方式中，上述的一組輻射爐 管的第一程管可以分別佈置在平面Α和β的同一端，第二 程管則可以分別佈置在平面A和B的另一端。 在本發明的一種優選實施方式中，在同一個平面A或 201026839 B内的一個輻射爐管的第一程與另一個輻射爐管的第二程管 可以相鄰佈置。 在本發明的一種優選實施方式中，所述的平面A上端 平面B上端可以向平面C等幅傾斜、傾斜角不超過μ度 為佳。 在本發明的一種優選實施方式中，所述的第一程管與 第一程管之間的連接件可以分上下兩層佈置，每層連接件 俯視投影為一組平行線，兩層連接件俯視投影為一組交叉 ❹ 線。 根據本發明’前面所述的乙烯裂解爐的輻射爐管可以 為Μ型、2-1型、2/1-1型、3-1型或3/1-1型爐管，其中 所述的1-1型爐管的第一程管和第二程管可以均為一根 管’通過所述的回彎管連接件與其第二程管連接； 所述的2-1型爐管的第一程管可以為兩根管，第二程管 為一根管； ® 所述的2/1-1型爐管的第一程管分可以為上下兩段，上 段為兩根管’下段為一根管，上、下段之間通過一個三通 連接件連接，第二程管為一根管； 所述的3-1型爐管的第一程管可以為三根管，第二程管 為一根管； 所述的3/1-1型爐管的第一程管可以分為上下兩段，上 段為三根管，下段為一根管，上、下段之間通過一個四通 連接件連接，第二程管為一根管。 201026839 在本發明的一種優選實施方式中，前面所述的輻射爐 管可以設置強化傳熱構件，包括任何類型，例如可以是扭 曲片爐管傳熱構件。 根據本發明’前面所述的輻射爐管的管徑可以是分段 變徑或連續變徑。 本發明的乙烯裂解爐的有益效果： 1、 本發明的輻射爐管為雙排排佈，輻射爐管的第一程 管與第二程管採用回彎管連接件連接是對稱的，爐管受力 均勻，其結構柔性大，具有較好的機械性能； 2、 相比現有技術中輻射段爐管雙排排佈方式，由於採® 用入口爐管與出口爐管相鄰排列，可以進一步減小爐管間 距，縮短裂解爐輻射段的長度，節約占地面積。在同樣長 度的爐膛空間内，本發明的裂解爐可以放置更多組爐管， 從而提供更大的生產能力。 3、 倒Ω連接件的突出效果是當爐管排佈不能保證每層 連接管之間有足夠空間時，通過倒Ω連接件來保證每層連 接管之間有足夠空間，同時它也可以更好地吸收第一與第 二程管之間的膨脹差。 © _ 4、採用了強化傳熱構件，消除了輻射爐管的受熱不均 勻門題’可以有效減少爐管的脊曲可提高裂解爐的線上 率減^操作費用和延長爐管使用壽命最終實現提高經 濟效益的目的。 【實施方式】 如附圖所示： 201026839 圖疋本發明的一組2-1型爐管排佈示意的俯視圖 8個輻射爐管組成-組，其中第-程管！排佈在一起，第二 程管2排佈在—起；第—程管1佈置在平面A、平面B的 左侧’第二㈣2所在佈置在平面A、平面B的右侧。2 面A、平面B以平面c對稱。 0201026839 VI. Description of the Invention: [Technical Field to Which the Invention Is Along] The present invention relates to an ethylene cracking furnace. [Prior Art] In an ethylene plant, a cracking furnace is a core device. The design of the n, w transfer coil is the key to determining crack selectivity, increasing cracking product olefins, blowing rate and improving the suitability of different cracking feedstocks. Improve the structure and arrangement of the light-shooting plate and become the core part of the development of tubular cracking furnace technology. Over the years, light-duty coils of different structures such as single-row branch reducer, mixed-distribution branch pipe, non-branched variable-barrier, and single-pass pipe have appeared. In order to greatly reduce the consumption of raw materials, maintain proper operation cycle and have good material adaptability, most companies currently use 、, -; two-way (18~28m) branch diameter change or two-way variable diameter high selectivity The furnace tube will control the residence time from 0.15 to 0.25 s. The first-pass pipe adopts a small-diameter furnace tube, which utilizes its large specific surface area to achieve rapid heating. The second-pass pipe uses a large straight (four) furnace tube to reduce the influence on the coking sensitivity. The two-way high-selection segment furnace tube used has a Μ type, 2] type, "type... type, 61 type, etc.. You use a two-pass furnace tube of 4-Bu 5-Bu and other configurations, usually four The furnace tubes of the group are equipped with a quenching (waste heat) _; the furnace tubes are arranged in a wrong row, that is, the __ process pipe single row, the second process pipe double row, and the first and second process furnace pipes adopt special connecting pipes: Bottom-cone type pipe connection. U.S. Lumskerest Company announced its furnace tube arrangement in patent CN106766, which is into the first process tube is 6 'second process tube is - root' first process tube The lower pass-collection tube is connected to the 201026839 two-way pipe. In this structure, since the first-way tube is a plurality of tubes, and the second-stage tube is a root portion, when the furnace tube is thermally expanded, the second-stage tube first expands downward and the first-row tube is pulled downward under the second-stage tube. Movement, wherein the force from the second path is smaller, the force near the second tube is larger, and the lower tube is rigidly connected, and the difference between the second tube and the first tube is only It can be adjusted by the balance system installed at the inlet of the first-pass pipe. As a result, when the first-pass pipe cannot move with the second-pass pipe, the pipe bends. Use 1 H 'usually _ group or two groups of furnace tubes with a linear quench (waste heat) boiler 'all bottom heating; the furnace tube usually uses a single row, the first tube bottom is inclined outward, then through the semi-circular tube and vertical The second pass is connected at the bottom. There are two ways of arrangement: υ The first and second pass pipes are arranged separately. ExxonMobil Chemical Patents has published a cracking furnace in the CN1259981 patent. 2) As disclosed in U.S. Patent No. 6, Test No. 27, the first process tube is arranged adjacent to the second process tube of the other set of furnace tubes. The common disadvantage of the two structural furnace tubes is that the second (four) is not inclined to the opposite direction because the lower portion of the first tube is inclined outward, and the adjacent first-stage tube is inclined to the other side, and the result is that the tube is heated. In the state, the entire light-shooting tube does not well maintain a single row t naturally to eliminate stress and become a double row. As a result, the sides of the furnace tube are unevenly heated, and the temperature of the tube walls on both sides is not equal. The temperature on the burner side is high and the side away from the side is low, causing the furnace tube to bend toward the burner side. Use 2 1 type two-way furnace tube 'usually eight groups of furnace tubes equipped with a quenching boiler; EP11461G5 has opened the cracking furnace arranged in such a furnace tube structure: two-way light-segment furnace tubes are vertically arranged in the radiant section furnace In the process, the straight pipe of the pipe and the two-way pipe are arranged in one plane, and the one-way straight pipe and the two-way pipe are respectively connected with one elbow through the s-shaped 201026839 pipe, and the s-shaped pipe of the one-pass pipe and the two-way pipe respectively Parallel, the connecting elbows may be semi-circular, semi-elliptical or semi-oval, and each elbow is at the same angle as the plane of the straight tube. 1-1 type furnace tube is used, usually one or two groups of furnace tubes are equipped with a linear quenching (waste heat) steel furnace. The furnace tubes are arranged in the first and second tubes respectively, using double rows, first and second. The connecting pipe between the pipes is a 9-degree elbow and a quasi-tube, as shown in Figure 12. The arrangement of the tubes is from the initial single row to the double row. For a single row, the same capacity requires a larger footprint. The advantage is that the tube tube has a uniform radial temperature distribution and less shielding. For the double row, the area of the cracking furnace is greatly reduced, but the shielding condition is serious, which affects the radial temperature distribution of the furnace tube, and the connection between the first and second tubes is easy to cause the furnace. The bending of the tube. The radiant furnace tube structure of the cracking furnace is also developed by a simple, less flexible elbow connection to a flexible, flexible elbow connection. SUMMARY OF THE INVENTION The object of the present invention is to overcome the defects and deficiencies in the structure and arrangement of single row and double row of radiant section furnace tubes in the prior art, and to provide a new type of cracking furnace for radiant section furnace tubes. The double row arrangement radiant section furnace tube cracking furnace of the invention is realized as follows: The double row arrangement radiant section furnace tube cracking furnace of the invention comprises a radiation zone, a burner, a radiant furnace tube arranged in the radiation zone, a convection zone, Quenching boiler and steam drum; characterized in that: a plurality of sets of blast furnace tubes are arranged in the radiation zone, wherein each group of radiant furnace tubes 5 201026839 is composed of a plurality of light-shooting furnace tubes; each of the radiations The furnace tube is a two-way vertical furnace tube, the first is an inlet tube, and the second tube is an outlet tube; the first tube and the second tube are connected by a return pipe connecting member; each group of light shooting furnace The center line of the first pass pipe of the pipe and the center line of the second pass pipe are arranged in the plane A and the plane B. 'The first pipe and the second pipe of each of the light-shooting furnace pipes are respectively in the plane A and B; the symmetrical center line of the return pipe connection of each of the light-shooting furnace tubes in the set of light-shooting furnace tubes is in a wrong plane, which is called plane c, and the plane A and Plane B is parallel to plane C. Plane A and plane B are symmetrically distributed on both sides of plane C; each of said The pipe connecting member is a three-dimensional structural member, and the plane c is a symmetrical plane, and the side view projection is a symmetrical curve, and the plan view is a straight line segment of the same length; the radiant furnace tubes of the same set of radiant furnace tubes are The return pipe joints are arranged in two layers, and the return pipes are arranged in parallel. In a preferred embodiment of the present invention, the above-mentioned return pipe connecting member may be an arc, a semicircle, a semi-ellipse, a parabola or an inverted Ω connector, wherein the inverted Ω is the arc and the half A round, semi-elliptical, parabolic connecting piece is combined with an S-shaped elbow. In a preferred embodiment of the present invention, the first pass pipes of the above-mentioned one set of radiant furnace tubes may be respectively disposed at the same end of the plane Α and β, and the second pass pipes may be respectively disposed at the other ends of the planes A and B, respectively. . In a preferred embodiment of the invention, the first pass of one radiant tube in the same plane A or 201026839 B and the second pass of the other radiant tube may be arranged adjacent. In a preferred embodiment of the present invention, the upper end of the upper plane B of the plane A may be inclined to the plane C, and the inclination angle is not more than μ degrees. In a preferred embodiment of the present invention, the connecting member between the first path tube and the first path tube may be arranged in two layers, and each layer connecting piece is projected in a plan view as a set of parallel lines, and two layers of connecting pieces. The overhead projection is a set of intersecting lines. The radiant furnace tube of the ethylene cracking furnace according to the present invention may be a crucible type, a 2-1 type, a 2/1-1 type, a 3-1 type or a 3/1-1 type furnace tube, wherein the The first pass pipe and the second pass pipe of the 1-1 type furnace tube may be a single pipe 'connected to the second pass pipe through the return bend pipe joint; the 2-1 type furnace pipe The first pipe can be two pipes, and the second pipe is one pipe; the first pipe of the 2/1-1 type pipe can be two upper and lower pipes, and the upper pipe is two pipes. a tube, the upper and lower sections are connected by a three-way connecting member, and the second-passing tube is a tube; the first-stage tube of the 3-1-type furnace tube may be three tubes, and the second-passing tube The first process pipe of the 3/1-1 type furnace tube can be divided into two upper and lower sections, the upper section is three tubes, the lower section is one tube, and the upper and lower sections are connected by a four-way connection. The piece is connected, and the second pipe is a pipe. 201026839 In a preferred embodiment of the invention, the radiant tube described above may be provided with a reinforced heat transfer member, including any type, such as a torsion sheet furnace tube heat transfer member. The pipe diameter of the radiant furnace tube according to the present invention may be a stepped diameter or a continuous variable diameter. The beneficial effects of the ethylene cracking furnace of the present invention: 1. The radiant furnace tubes of the present invention are arranged in two rows, and the first pass pipe and the second pass pipe of the radiant furnace pipe are connected by a return pipe connecting member, and the furnace pipe is symmetric. Uniform force, large structural flexibility, good mechanical properties; 2, compared to the prior art radiant section furnace tube double row arrangement, because the inlet and outlet tubes of the mining furnace are arranged adjacent to each other, further Reduce the spacing of the furnace tubes, shorten the length of the radiant section of the cracking furnace, and save floor space. In the same length of the furnace space, the cracking furnace of the present invention can place more sets of furnace tubes, thereby providing greater production capacity. 3. The outstanding effect of the inverted Ω connector is that when the furnace tube arrangement does not ensure sufficient space between each layer of connecting pipes, the inverted Ω connecting piece ensures sufficient space between each connecting pipe, and it can also be more The difference in expansion between the first and second tube is well absorbed. © _ 4, the use of enhanced heat transfer components, eliminating the uneven heating of the radiant furnace tube 'can effectively reduce the curvature of the furnace tube can increase the on-line rate of the cracking furnace, reduce operating costs and extend the life of the furnace tube. The purpose of improving economic efficiency. [Embodiment] As shown in the drawing: 201026839 Fig. 1 is a plan view showing a set of 2-1 type furnace tubes arranged in the present invention. 8 radiant furnace tubes are composed of a group, wherein the first-stage tube! Arranged together, the second tube 2 is arranged in the same position; the first tube 1 is arranged on the plane A, the left side of the plane B. The second (four) 2 is arranged on the right side of the plane A and the plane B. 2 plane A, plane B is symmetrical with plane c. 0
圖3的爐管排佈是由8個輻射爐管組成—組，其中第 :::i排佈在平面A、平面B的左側’第二程管2排佈 在千面B、平面A的右側。第一程管與第二程管之間的連 接管分上下兩層佈置，每層連接管俯視投影為—組平行線 ’兩層連接管俯視投影為—組交叉線。第―程管與第二程 管之間的連接管的正視及側視投影為“U”型。 圖4的爐管排佈是由8個輻射爐管組成—組，其中第 一程管1排佈在平面A、平面B的左側，第二程管2排佈 在平面B、平面A的右側。第一程管與第二程管之間的連 接管分上下兩層佈置，每層連接管俯視投影為—組平行 里線，兩層連接管俯視投影為一組交又“z”型線。第一程管 與第二程管之間的連接管的正視投影為“U”型，端視投影為 倒Ω型。 ^ 圖5的兩組爐管排佈中，每8個輻射爐管組成一組， 其中兩組第二程管2排佈在—起。 圖6的兩組爐管排佈令，每8個輻射爐管組成一組， 其中組輻射爐管的第二程管和另一組輻射爐管的第一程 管相鄰。第一程管與第二程管之間的連接管分上下兩層佈 置’每層連#管俯視投影為一組平行#，兩層連接管俯視 201026839 . 投影為一組交又線。 圖7A、7B是兩組1-1型爐管排佈示意的俯視圖，由8 個輻射爐管組成一組，其中一組輻射爐管的第二程管和另 一組輻射爐管的第一程管相鄰。第一程管與第二程管之間 的連接管分上下兩層佈置，每層連接管俯視投影為一組平 行Z型線’兩層連接管俯視投影為一組交又“Z”型線。 圖8是一組1-1型爐管排佈示意的正視圖、俯視圖、侧 視圖。由8個輻射爐管組成一組，其中兩個平行平面A和 B的任一平面内每個輻射爐管的第二程管和其他輻射爐管的 第一程管相鄰。第一程管與第二程管之間的連接管分上下© 兩層佈置，每層連接管俯視投影為一組平行線，兩層連接 管俯視投影為一組交叉線。第一程管與第二程管之間的連 接管的正視及端視投影為“U”型。 圖9的爐管排佈是由16個輻射爐管組成，其中兩個平 行平面A和B的任一平面内每個輻射爐管的第二程管和其 他輻射爐管的第一程管相鄰。每組爐管中第一程管與第二 程管之間的連接管分上下兩層佈置，每層連接管俯視投影 為一組平行線，兩層連接管俯視投影為一組交又線。第」〇 程管與第二程管之間的連接管的正視及端視投影為型。 圖10的爐管排佈是由8個輻射爐管組成一組，其中兩 個平行平面八和B的任一平面内每個輻射爐管的第^程管 和其他輻射爐管的第一程管相鄰。第一程管與第二程管之 間的連接管分上下兩層佈置，每層連接管俯視投影為—組 平打“Z”型線，兩層連接管俯視投影為一組交又“z”型線。 10 201026839 第程管與第二程管之間的連接管的正視投影為“u”型，端 視投影為倒ω型。 圖11A、11B的爐管排佈是由8個輻射爐管組成一組， 其中兩個平行平面A和B的任一平面内每個輻射爐管的第 二程管和其他輻射爐管的第一程管相鄰。第—程管與第二 程管之間的連接管分上下兩層佈置，每層連接管俯視投影 為一組平行“z”型線，兩層連接管俯視投影為一組交又“z” 型線。 ® 圖12的爐管排佈是現有技術的一種排佈，由8個輻射 爐管組成，其中兩個平行平面A和B的同一端佈置第一程 g、在另一端佈置輻射爐管的第二程管。第一程管與第二 程管之間的連接管分上下兩層佈置，每層連接管俯視投影 為一組平行線’兩層連接管俯視投影為一組交叉線。第一 程管與第二程管之間的連接管的正視投影和端視投影均由 兩個90度彎頭和一根水平管構成的u型。 下面結合附圖8給出一個實施例。以下描述僅表示本 〇 發明的具體實施方式，只是為了進一步對本發明進行說明 ’而並不對本發明進行限制。 本發明的裂解爐包括高壓汽鼓3、對流段4、輻射段5 、垂直佈置在輻射段的多組輻射爐管7、燃燒器8、急冷鍋 爐6，輕射段爐腫内部南度13700mm、寬度3 5 5 0mm、長度 18930mm。由第一程管1及第二程管2組成每一個1-1型排 列的雙排兩程立式輻射爐管，每排均佈置第一及第二程管 且交錯排列，在第一程管和第二程管之間採用半圓型彎管 11 201026839 連接件連接，裂解物料由第一 程^引入，由第二程管引出 。第一程管下部與所述的變 ^管連接件的-端固定連接； 輻射爐管的第二程管包括：一 很出口管，與所述的回彎管 連接件的另一端固定連接。平面 卞由A和B平行，間距400mm 。回彎管連接件互相平行。第一 弟程管1和第二程管2的長The furnace tube arrangement of Fig. 3 is composed of 8 radiant furnace tubes, wherein::::i is arranged on the left side of plane A and plane B. The second-pass tube 2 is arranged on the surface of plane B and plane A. Right. The connecting pipe between the first pipe and the second pipe is arranged in two layers, and each pipe is projected in a plan view as a set of parallel lines. The two pipes are viewed as a set of intersecting lines. The front and side projections of the connecting tube between the first and second tubes are "U" type. The furnace tube arrangement of Fig. 4 is composed of 8 radiant furnace tubes, wherein the first pass pipe 1 is arranged on the left side of the plane A and the plane B, and the second pass pipe 2 is arranged on the right side of the plane B and the plane A. . The connecting pipe between the first pipe and the second pipe is arranged in two layers, and each layer of the connecting pipe is projected as a parallel line, and the two pipes are projected as a set of "z" lines. The front view projection of the connecting tube between the first pass pipe and the second pass pipe is "U" type, and the end view projection is inverted Ω type. ^ In the two sets of furnace tube arrangement of Fig. 5, each of the eight radiant furnace tubes is composed of one set, and two sets of the second pass tubes 2 are arranged in a row. In the two sets of furnace tube arrangement of Fig. 6, each of the eight radiant furnace tubes is grouped, wherein the second pass tube of the group radiant furnace tube is adjacent to the first pass tube of the other set of radiant furnace tubes. The connecting pipe between the first pipe and the second pipe is divided into two layers. The top pipe of each layer is a parallel group #, and the two pipes are viewed from 201026839. The projection is a set of intersection and line. 7A and 7B are schematic plan views showing the arrangement of two sets of 1-1 type furnace tubes, which are composed of 8 radiant furnace tubes, wherein the first of the radiant furnace tubes and the first of the other radiant furnace tubes The pipe is adjacent. The connecting pipe between the first pipe and the second pipe is arranged in two layers, and each connecting pipe is projected as a set of parallel Z-shaped wires. The two-layer connecting pipe is a set of intersecting and "Z" shaped wires. . Figure 8 is a front elevational view, a plan view, and a side view of a set of 1-1 type furnace tubes. A group consisting of eight radiant tubes, wherein the second pass of each radiant tube in either plane of the two parallel planes A and B is adjacent to the first pass of the other radiant tube. The connecting pipe between the first pipe and the second pipe is arranged in two layers, and each connecting pipe is projected as a set of parallel lines in a plan view, and the two pipes are projected as a set of intersecting lines. The front view and the end view projection of the connecting tube between the first pass pipe and the second pass pipe are "U" type. The furnace tube arrangement of Figure 9 is composed of 16 radiant furnace tubes, wherein the second pass of each radiant tube and the first pass of the other radiant tube in either plane of two parallel planes A and B adjacent. The connecting pipe between the first pipe and the second pipe in each group of furnace tubes is arranged in two layers, and each layer of the connecting pipe is a set of parallel lines in a plan view, and the two layers of connecting pipes are projected as a set of intersecting and parallel lines. The front view and the end view projection of the connecting pipe between the first pipe and the second pipe are typed. The furnace tube arrangement of Figure 10 is a group consisting of 8 radiant furnace tubes, the first of which is the second pass of each radiant tube and the other radiant tubes in any plane parallel to planes eight and B. The tubes are adjacent. The connecting pipe between the first pipe and the second pipe is arranged in two layers, and each layer of the connecting pipe is projected as a group of "Z"-shaped wires, and the two pipes are projected as a group of "z". Profile line. 10 201026839 The front view projection of the connecting pipe between the first pipe and the second pipe is "u" type, and the end projection is inverted ω type. The furnace tube arrangement of Figures 11A, 11B is composed of 8 radiant furnace tubes, wherein the second tube of each radiant tube and the other radiant tube tubes in any of the two parallel planes A and B One pass is adjacent. The connecting pipe between the first pipe and the second pipe is arranged in two layers, and each connecting pipe is projected as a set of parallel "z"-shaped wires, and the two-layer connecting pipe is a set of intersections and "z". Profile line. The furnace tube arrangement of Figure 12 is an arrangement of the prior art consisting of 8 radiant furnace tubes, wherein the same end of the two parallel planes A and B is arranged with the first pass g, and the other end of the radiant furnace tube is arranged Two-way tube. The connecting pipe between the first pipe and the second pipe is arranged in two layers, and each pipe is projected as a set of parallel lines in a plan view. The two pipes are projected as a set of intersecting lines. Both the front projection and the end projection of the connecting tube between the first tube and the second tube are u-shaped by two 90-degree elbows and one horizontal tube. An embodiment is given below in conjunction with FIG. The following description is only illustrative of specific embodiments of the invention, and is not intended to limit the invention. The cracking furnace of the present invention comprises a high pressure steam drum 3, a convection section 4, a radiant section 5, a plurality of sets of radiant furnace tubes 7 vertically arranged in the radiant section, a burner 8, and a quenching boiler 6, and the inside of the light shot section is 13700 mm south, The width is 3 5 5 0mm and the length is 18930mm. The first-row tube 1 and the second-path tube 2 are each composed of a 1-1 type double-row two-stage vertical radiant furnace tube, and each row is arranged with first and second tube tubes and staggered in the first step. The semi-circular elbow 11 201026839 is connected between the pipe and the second pipe, and the cracking material is introduced by the first pass and taken out by the second pipe. The lower portion of the first tube is fixedly connected to the end of the tube connector; the second tube of the radiant tube comprises: a very outlet tube fixedly connected to the other end of the return tube connector. The plane 平行 is paralleled by A and B with a spacing of 400 mm. The return bend connectors are parallel to each other. The length of the first brother 1 and the second tube 2
度都為議㈣…個爐管為一組輕射段佈置12組爐 管每個爐管出口連接一個線性急冷銷爐。爐管回變管連 接件分兩層，每層各個連接管互相平行排佈，兩層連接管 交又排佈。爐管通過頂部的恒力彈簧吊架懸掛。第一程爐 管的内徑是45mm〜60_，第二程爐管的内徑是 65mm〜75mm。輻射爐管管徑是介於上述範圍的某一值。 輻射段供熱由底部燃燒器和侧壁燃燒器共同提供，其 中底部供熱70%。 急冷鋼爐採用線性急冷銷爐，每一個丨爐管與一個線 性急冷鍋爐直接相連。 如果對現有裂解爐進行改造，則供熱比率（底部供熱 )、急冷鍋冷形式根據具體情況可以保留原設計型式。 【圖式簡單說明】 © 圖1是本發明的乙烯裂解爐的示意圖。 圖2是本發明的一組2-1型爐管排佈示意的俯視圖。 圖3是本發明的一組i_i型爐管排佈示意的正視圖、俯 視圖、側視圖。 圖4是本發明的一組1-1型爐管排佈示意的正視圖、俯 視圖、側視圖 12 201026839 圖5是本發明的兩組1-1型爐管排佈示意的正視圖、侧 視圖。 圖6是本發明的兩組1-1型爐管排佈示意的俯視圖。 圖7A、7B是本發明的兩組K1型爐管排佈示意的俯視 圖。 圖8是本發明的一組1-1型爐管排佈示意的正視圖、俯 視圖、側視圖。 圖9是本發明的兩組型爐管排佈示意的正視圖、俯 φ 視圖、侧視圖。 圖10是本發明的一組1-1型爐管排佈示意的正視圖、 俯視圖、側視圖。 圖11A、11B是本發明的兩組i·!型爐管排佈示意的俯 視圖。 圖12是一組現有技術的M型爐管排佈示意的正視圖 、俯視圖、侧視圖。 13 201026839 【主要元件符號說明】 1 ..........第一程管 2 ..........第二程管 3 ..........高壓汽鼓 4 ..........對流段 5 ..........輻射段 6 ..........急冷锅爐 7 ..........輻射爐管 8 ..........燃燒器Degrees are discussed (four)... A furnace tube is arranged for a group of light shots with 12 sets of tubes. Each furnace tube outlet is connected to a linear quench pin furnace. The furnace tube return pipe connecting piece is divided into two layers, and each connecting pipe of each layer is arranged in parallel with each other, and the two connecting pipes are arranged and arranged again. The furnace tube is suspended by a constant force spring hanger at the top. The inner diameter of the first pass furnace tube is 45 mm to 60 mm, and the inner diameter of the second pass furnace tube is 65 mm to 75 mm. The diameter of the radiant furnace tube is a value in the above range. The radiant section heating is provided by the bottom burner and the side wall burner, with the bottom heating 70%. The quenching steel furnace uses a linear quenching pin furnace, and each crucible tube is directly connected to a linear quenching boiler. If the existing cracking furnace is modified, the heating ratio (bottom heating) and the quenching cold form may retain the original design according to the specific situation. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view of an ethylene cracking furnace of the present invention. Figure 2 is a schematic plan view showing the arrangement of a set of 2-1 type furnace tubes of the present invention. Figure 3 is a front elevational, plan and side elevational view of a set of i_i type furnace tubes of the present invention. 4 is a front view, a plan view, and a side view of a set of 1-1 type furnace tubes according to the present invention. 12 201026839 FIG. 5 is a front view and a side view showing the arrangement of two sets of 1-1 type tubes of the present invention. . Figure 6 is a plan view showing the arrangement of two sets of 1-1 type furnace tubes of the present invention. 7A and 7B are schematic plan views showing the arrangement of two sets of K1 type furnace tubes of the present invention. Fig. 8 is a front elevational view, a plan view and a side elevational view showing the arrangement of a set of 1-1 type furnace tubes of the present invention. Fig. 9 is a front elevational view, a plan view, and a side view showing the arrangement of the two sets of furnace tubes of the present invention. Figure 10 is a front elevation, plan view and side elevational view, schematically showing the arrangement of a set of 1-1 type furnace tubes of the present invention. Figures 11A and 11B are schematic plan views showing the arrangement of two sets of i·! type furnace tubes of the present invention. Figure 12 is a front elevational, plan view, side elevational view of a prior art M-shaped furnace tube arrangement. 13 201026839 [Explanation of main component symbols] 1 .......... First pass pipe 2 .......... Second pass pipe 3 .......... High voltage Steam drum 4 .......... convection section 5 .......... radiant section 6 .......... quenching boiler 7 .... ...radiation furnace tube 8 .......... burner
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