CN203796958U - Horizontal type pyrolysis dry distillation furnace sealing structure - Google Patents

Abstract

The utility model relates to a sealing structure of a horizontal pyrolysis and carbonization furnace, which comprises a sealing cavity fixed on the horizontal pyrolysis and carbonization furnace connected with a kiln body. The bottom of the sealing chamber is provided with a graphite floating ring seal assembly and a graphite tape braided packing II, and the top is provided with a cooling water inlet; the left bottom of the graphite floating ring seal assembly is provided with a graphite tape braided packing I, The upper part is provided with a compensation expansion joint, and the front part is provided with a stuffing box and a packing gland I in turn; the graphite floating ring seal assembly or the graphite ribbon braided packing I is connected to the horizontal pyrolysis retort furnace Nitrogen gas inlets are provided at the seals; the graphite tape braided packing II is provided with packing gland II; the right side of the sealing chamber is provided with aluminum silicate fiber felt and high alumina fiber board in sequence. The utility model has good sealing performance, is suitable for high-temperature working environment, is suitable for sealing large-scale horizontal pyrolysis and retort furnaces, and can compensate radial runout in the range of 3-5 mm during the rotation process.

Description

A sealing structure of a horizontal pyrolysis and carbonization furnace

technical field

The utility model relates to the technical field of a pulverized coal horizontal pyrolysis and carbonization furnace, in particular to a sealing structure of a horizontal pyrolysis and carbonization furnace. the

Background technique

Pulverized coal is converted into coal tar, gas, semi-coke and other substances at a furnace temperature of 500~650°C. Coal gas is a flammable and explosive gas, which can easily cause combustion and explosion in aerobic and air environments, and the degree of danger is high. During the pyrolysis process, if air enters the pyrolysis furnace, the gas will easily burn and explode. If the gas leaks out, it will pollute the environment and cause harm to human health. Excessive leakage may even endanger human life. the

At present, the sealing structure of pulverized coal horizontal pyrolysis and retort furnace commonly used in industry mainly adopts friction plate sealing structure, metal asbestos plate and spring combined sealing structure, labyrinth sealing structure, radial contact sealing structure, etc. The main disadvantages of the above sealing structure: ⑴ single structure, poor sealing effect; ⑵ no reliable axial and radial compensation device, that is, no compensation for the deviation of the concentricity of the rotary cylinder and the eccentricity of the seal; (4) Due to the limitation of the sealing structure, it is not easy to use on large horizontal pyrolysis and retort furnaces; (5) The service life of the seal is short; [6] It is not suitable for use under high temperature conditions of 500~650°C. the

Utility model content

The technical problem to be solved by the utility model is to provide a sealing structure of a horizontal pyrolysis retort furnace with good sealing performance. the

In order to solve the above problems, a sealing structure of a horizontal pyrolysis and carbonization furnace according to the utility model is characterized in that: the structure includes a sealing cavity fixed on the horizontal pyrolysis and carbonization furnace connected with the kiln body; The bottom of the cavity is provided with a graphite floating ring seal assembly and graphite tape braided packing II, and the top is provided with a cooling water inlet; the left bottom of the graphite floating ring seal assembly is provided with a graphite tape braided packing I, and its upper part is provided with There is a compensating expansion joint, the front of which is provided with a stuffing box and a stuffing gland I in sequence; the sealing part where the graphite floating ring seal assembly or the graphite ribbon braided packing I connects with the horizontal pyrolysis and retort furnace is uniform A nitrogen inlet is provided; the graphite tape braided packing II is provided with a packing gland II; the right side of the sealed chamber is provided with an aluminum silicate fiber felt and a high alumina fiber board in sequence. the

The graphite floating ring seal assembly includes four layers of graphite floating ring layers: floating ring layer I, floating ring layer II, floating ring layer III, and floating ring layer IV from left to right; in the four graphite floating ring layers Each layer is divided into 30 equal parts and arranged in a staggered manner, wherein 1/30 of the floating rings in each layer are fixed on the side wall of the sealed cavity or on the floating rings of the adjacent layer through anti-rotation pins; A spring is installed between the ring layer II and the floating ring layer III; each layer of the four graphite floating ring layers is provided with an outer hoop tension spring. the

Compared with the prior art, the utility model has the following advantages:

1. In this utility model, there is a graphite floating ring sealing assembly composed of four layers of graphite floating ring layers. Each layer is divided into 30 equal parts and arranged in a staggered manner. 1/30 of the floating rings in each layer are fixed on the The side wall of the sealed cavity or the floating ring of the adjacent layer can effectively prevent the graphite floating ring from rotating when the kiln body rotates; at the same time, a spring is installed between the floating ring layer II and the floating ring layer III, and the floating ring layer I It can be closely attached to the left side wall of the cavity and the axial end surface of the floating ring layer II, and the floating ring layer IV is closely attached to the right side wall of the cavity and the axial end surface of the floating ring layer III; in the circumferential direction, in order to ensure that each layer The 30 semi-floating rings are closely attached to each other, and each layer of the four layers of graphite floating rings is equipped with an outer hoop tension spring, which respectively tightens the four layers of graphite floating rings to make it a full sealing ring again. The gap between the sealing ring and the cylinder body is 0. When the kiln body rotates for a long time, due to the wear of the inner ring of the graphite floating ring, the four-layer graphite floating ring gradually shrinks under the external force of the tension spring of the outer hoop; After running-in to a certain extent, the 1/30 floating rings of each layer are tightly bonded together, and at this time, the gap between the graphite floating ring and the sealing surface will not change, that is, this is also the best sealing state after running-in. On this basis, an appropriate amount of nitrogen gas is fed back to the sealing component to form a sealed air flow, which can more effectively prevent gas leakage.

2. The utility model is equipped with aluminum silicate fiber felt and aluminum silicate fiber board, which can effectively isolate the high-temperature flue gas in the kiln from entering the sealed cavity. the

3. In the utility model, the sealing cavity is provided with a cooling water inlet, which can effectively reduce the temperature of the graphite floating ring sealing assembly. the

4. The left and right sides of the graphite floating ring seal assembly in this utility model are equipped with graphite tape braided packing I and graphite tape braided packing II. The packing is characterized by wear resistance and high temperature resistance. Because the sealing surface is long, Due to the large outer diameter of the sealing surface of the cylinder and the processing deviation of the concentricity of the rotary cylinder, etc., a compensating expansion joint is used to connect the left stuffing box and the sealing chamber, that is, the left packing and sealing structure can be independently fine-tuned as a single unit, and the sealing The graphite floating ring seal assembly in the cavity can also compensate for the 3~5mm runout of the kiln body to better ensure the sealing gap and sealing performance; at the same time, the graphite tape braided packing I also uses nitrogen backflushing to form a sealed airflow Protect it. the

5. The utility model adopts the combination of graphite braided packing (filler) seal, graphite floating ring seal, double nitrogen auxiliary seal, and aluminum silicate fiber heat insulation layer auxiliary seal. It has good sealing performance, is suitable for high temperature working environment, and is suitable for It is suitable for large-scale horizontal pyrolysis and retort furnace sealing, and can compensate for the radial runout in the range of 3~5mm during the rotation process. the

Description of drawings

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail. the

Fig. 1 is the structural representation of the utility model. the

Fig. 2 is a schematic diagram of a graphite floating ring seal assembly in the present invention. the

In the figure: 1—Packing Gland Ⅰ 2—Stuffing Box 3—Compensating Expansion Joint 4—Sealing Chamber 41—Cooling Water Inlet 5—Aluminum Silicate Fiber Felt 6—High Alumina Fiber Board 7—Graphite Tape Braided Packing Ⅰ 8—Graphite Floating ring seal assembly 81—Anti-rotation pin 82—Graphite floating ring layer 83—Spring 84—Outer hoop tension spring 9—Graphite tape braided packing II 10—Packing gland II 11—Nitrogen gas inlet. the

Detailed ways

As shown in FIG. 1 , a sealing structure of a horizontal pyrolysis and carbonization furnace includes a sealing chamber 4 fixed on the horizontal pyrolysis and carbonization furnace connected with the kiln body. The inner bottom of the sealing chamber 4 is respectively provided with a graphite floating ring seal assembly 8 and a graphite tape braided packing II9, and the top is provided with a cooling water inlet 41; the left bottom of the graphite floating ring seal assembly 8 is provided with a graphite tape braided packing I7, The upper part is provided with a compensating expansion joint 3, and the front part is provided with a stuffing box 2 and a packing gland I1 in sequence; the seal of the graphite floating ring seal assembly 8 or graphite tape braided packing I7 and the horizontal pyrolysis retort furnace are all sealed. A nitrogen inlet 11 is provided; graphite tape braided packing II 9 is provided with packing gland II 10; the right side of the sealing chamber 4 is provided with aluminum silicate fiber felt 5 and high alumina fiber board 6 in turn. the

Wherein: the graphite floating ring seal assembly 8 includes four graphite floating ring layers 82 (refer to FIG. 2 ) which are sequentially from left to right: floating ring layer I, floating ring layer II, floating ring layer III, and floating ring layer IV. Each of the four layers of graphite floating ring layers 82 is equally divided into 30 equal parts and arranged in a staggered manner, wherein 1/30 of the floating rings in each layer are fixed to the side wall of the sealed cavity 4 or adjacent layers through anti-rotation pins 81 On the floating ring; a spring 83 is installed between the floating ring layer II and the floating ring layer III; each of the four graphite floating ring layers 82 is provided with an outer hoop tension spring 84. the

Claims (2)

1. a horizontal pyrogenation and carbonization stove sealing configuration, is characterized in that: this structure comprises the Seal cage (4) being fixed on the horizontal pyrogenation and carbonization stove being connected with kiln body; Described Seal cage (4) inner bottom part is respectively equipped with graphite floating-ring seal assembly (8), graphite tape braiding packing II (9), and its top is provided with cooling water inlet (41); The left bottom of described graphite floating-ring seal assembly (8) is provided with graphite tape braiding packing I (7), and its top is provided with compensate for dilatation joint (3), and its front portion is provided with stuffing box (2), Gland I (1) successively; Described graphite floating-ring seal assembly (8) or described graphite tape braiding packing I (7) are equipped with nitrogen inlet (11) with sealing place that described horizontal pyrogenation and carbonization stove joins; Described graphite tape braiding packing II (9) is provided with Gland II (10); The right side of described Seal cage (4) is provided with alumina silicate fiber felt (5) and high aluminum fiber plate (6) successively.

2. a kind of horizontal pyrogenation and carbonization stove sealing configuration as claimed in claim 1, is characterized in that: described graphite floating-ring seal assembly (8) comprises the four layers of graphite floating ring layer (82) that are followed successively by from left to right floating ring layer I, floating ring layer II, floating ring layer III, floating ring layer IV; Divide equally 30 equal portions and interlaced arrangement for every layer in described four layers of graphite floating ring layer (82), wherein 1/30 floating ring in every layer is all fixed on the cavity wall of described Seal cage (4) or the floating ring of adjacent layer by stop pin (81); Between described floating ring layer II and described floating ring layer III, spring (83) is installed; Every layer in described four layers of graphite floating ring layer (82) is provided with outer hoop extension spring (84).