PTA powder sampling equipment

Abstract

The utility model discloses PTA (pure terephthalic acid) powder sampling equipment, which belongs to the technical field of chemical engineering sampling equipment and comprises a shell, the upper part of the shell is of a cylindrical structure, the lower part of the shell is of an inverted conical structure, a discharge elbow is arranged at the upper part of the shell, and a material guide pipeline is obliquely upwards arranged at the upper part of the shell. The feeding direction of the material guiding pipeline is the inclined tangent direction, and the material guiding pipeline enters the shell to form a vortex shape. The material guiding pipeline is connected with the sampling valve, a material receiving valve is arranged on the lower portion of the shell, a conical material blocking disc is installed in the shell and used for blocking materials and preventing the materials from being blown out of the shell by tail gas, the conical material blocking disc is fixedly connected with the inner wall of the shell through a fixing piece, and the fixing piece and the conical material blocking disc are also made of stainless steel. A nitrogen purging pipeline is arranged at the position of the discharge elbow and connected with a conical purging opening, the conical purging opening is located in the center position over the conical material blocking disc, and the material sampling device is mainly applied to material sampling in PTA production.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of chemical sampling equipment, and particularly relates to a PTA powder sampling equipment. BACKGROUND

[0002] In the PTA production process, from oil substances to powdery substances, from liquid to solid powder, according to the difference of each production stage, the sampling equipment is also different.

[0003] At present, in the PTA production, the product from the drying machine in the refining section is in the form of solid powder, the standard particle size of the product is 125±5 μm, and the viscosity is 0.5-0.7 Pa.s. Due to the different forms of the conveyed product, the sampling equipment is quite different. In the process of using the pipe chain to convey, due to the absence of the interference of tail gas, the sample has high representativeness.

[0004] However, in the process of using tail gas as the power source for conveying the product, due to the high interference of the gas on the solid powder, whether the operator discharges and takes the sample through the conveying pipeline or uses the inner extension pipe to take the sample, the sweeping of the gas on the powder will cause the deviation of the sample analysis, especially the influence on the particle size of the product and the PT acid, and meanwhile, the operation environment is affected.

[0005] When the tail gas is used for sweeping, part of the material will be swept into the atmosphere, polluting the environment and not meeting the requirements of environmental protection.

[0006] In order to reduce the above influences, the applicant has made corresponding improvements on the existing sampling equipment through research, and good effects have been achieved in the actual application process. CONTENT OF THE UTILITY MODEL

[0007] In order to solve the technical problems in the background art, the utility model provides a PTA powder sampling equipment, and the technical scheme adopted is as follows:

[0008] A PTA powder sampling equipment, including a shell, the material of the shell is 304 stainless steel, wherein the upper part of the shell is a cylindrical structure, the lower part of the shell is a reverse conical structure, and the upper part of the shell is provided with a discharge elbow.

[0009] The core improvements of the utility model are as follows:

[0010] The upper part of the shell is provided with a material guiding pipeline which is installed obliquely upwards, the feeding direction of the material guiding pipeline is the direction of the tangent line which enters the shell, and a vortex is formed. The material guiding pipeline is connected with a sampling valve, and the lower part of the shell is provided with a material receiving valve.

[0011] A conical material blocking disc is installed in the shell, the conical material blocking disc is used for shielding the material to avoid being swept out of the shell by the tail gas, the conical material blocking disc is fixedly connected with the inner wall of the shell through a fixing piece, and the materials of the fixing piece and the conical material blocking disc are also stainless steel.

[0012] Nitrogen purging pipeline is arranged at the vent elbow, the nitrogen purging pipeline is connected with the conical purging port, and the conical purging port is located at the center position directly above the conical material baffle, so that part of the material can be blown down.

[0013] Preferably, in order to facilitate the fixation of the device, the shell is provided with lifting lugs on both sides for fixing the shell.

[0014] Preferably, in order to better shield the material, the conical material baffle is provided with an annular baffle one, and the shell is further provided with an annular baffle two, the annular baffle one and the annular baffle two are arranged in cross and the annular baffle two is located above the annular baffle one.

[0015] Preferably, in order to improve the service life of the device, the materials of the shell, the material guiding pipeline, the vent elbow, the conical material baffle, the annular baffle one and the annular baffle two are all 304 stainless steel.

[0016] The utility model has the following advantages:

[0017] According to the characteristics of PTA products and the actual production situation, the cyclone separation sampling device is designed, the problem of human error caused by different operation habits when the operator samples is solved, and the human sampling operation error is excluded. According to the dry machine sample, the wind-sending tail gas is used, and the influence of gas on solid powder sample is reduced. Through the structural design of the utility model, the environmental pollution caused by powder due to gas blowing is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The internal structure of the utility model Figure 1 ;

[0019] Figure 2 The internal structure of the utility model Figure 2 ;

[0020] Figure 3 The annular baffle two structure diagram of the utility model

[0021] Figure 4 The annular baffle one structure diagram of the utility model.

[0022] In the drawing: 1, shell, 2, material receiving valve, 3, conical material baffle, 4, lifting lug, 5, sampling valve, 6, vent elbow, 7, nitrogen purging pipeline, 8, conical purging port, 9, annular baffle two, 10, annular baffle one, 11, fixing piece. DETAILED DESCRIPTION

[0023] Example 1

[0024] As shown in the drawing: Figure 1

[0025] ​A PTA powder sampling device includes a housing 1, wherein the upper part of the housing 1 is cylindrical and the lower part is inverted conical. A venting bend 6 is provided in the upper part of the housing 1.

[0026] A feed line is installed obliquely upward on the upper part of the housing 1. The feed line is connected to the sampling valve 5. A receiving valve 2 is provided on the lower part of the housing 1.

[0027] A conical baffle 3 is installed inside the housing 1, and the conical baffle 3 is fixedly connected to the inner wall of the housing 1 by a fastener 11;

[0028] A nitrogen purging line 7 is provided at the venting bend 6. The nitrogen purging line 7 is connected to the conical purging port 4, which is located at the center of the conical baffle plate 3.

[0029] The working principle of this utility model is as follows:

[0030] First, secure the sampler using the lifting lugs 4 on both sides. Connect the sampler to the dryer's discharge pipe via the sampling valve 5, eliminating human interference. Open the bottom receiving valve 2 and place the sampling bottle. With the receiving valve 2 open, the gas phase carrying powder from inside the dryer enters the shell 1 tangentially at a downward 45° angle. After entering the sampler, the powder forms a cyclone separation. Most of the powder falls to the bottom of the shell 1 under gravity, while a small amount of powder and gas rises, encountering the top conical baffle 3 and being deflected. Most of the smaller, finer powder falls into the cone, increasing the representativeness of the sample. After the sampling bottle is full, close the sampling valve 5 first, then close the bottom receiving valve 2. Periodically open the nitrogen manual valve to purge for 5-10 seconds, then close the nitrogen manual valve to reduce any powder that may fall above the conical baffle, preventing it from drifting outwards and affecting environmental hygiene.

[0031] Example 2

[0032] like Figures 2-4 As shown:

[0033] A PTA powder sampling device includes a housing 1, wherein the upper part of the housing 1 is cylindrical and the lower part is inverted conical. A venting bend 6 is provided in the upper part of the housing 1.

[0034] A feed line is installed obliquely upward on the upper part of the housing 1. The feed line is connected to the sampling valve 5. A receiving valve 2 is provided on the lower part of the housing 1.

[0035] A conical baffle 3 is installed inside the housing 1, and the conical baffle 3 is fixedly connected to the inner wall of the housing 1 by a fastener 11;

[0036] A nitrogen purging line 7 is provided at the venting bend 6. The nitrogen purging line 7 is connected to the conical purging port 4, which is located at the center of the conical baffle plate 3.

[0037] The shell 1 is provided with lifting lugs 4 on both sides for fixing the shell 1;

[0038] The conical baffle 3 is provided with an annular baffle 10, and the shell 1 is further provided with an annular baffle 9, the annular baffles 10 and 9 are arranged in cross and the annular baffle 9 is located above the annular baffle 10.

[0039] The working principle of the utility model is as follows:

[0040] First, the sampler is fixed through the lifting lugs 4 on both sides of the sampler, the sampling valve 5 is connected with the dry machine, the artificial interference factor is excluded, the bottom material receiving valve 2 is opened, and the sampling bottle is placed. Opening the material receiving valve 2, the gas phase in the dry machine carries the powder to enter the shell 1 in the 45° direction tangent downward, and the powder forms cyclone separation after entering the sampler. Most of the powder falls into the bottom of the shell 1 under the action of gravity, and a small amount of powder and gas float upward and are blocked by the top conical baffle 3 and return, most of the fine powder with small particle size falls into the cone part. The representativeness of the sample is increased. After the sampling bottle is filled, the sampling valve 5 is closed first, then the bottom material receiving valve 2 is closed, the nitrogen hand valve is opened for 5-10 seconds for blowing, the nitrogen hand valve is closed, the powder that may fall above the conical baffle 3 is reduced, and the annular baffles 10 and 9 are used to better prevent the material from floating outward, so that the environmental protection requirement is reached.

Claims

1. A PTA powder sampling device, comprising a shell (1), wherein the upper part of the shell (1) is a cylindrical structure and the lower part of the shell (1) is an inverted conical structure, and the upper part of the shell (1) is provided with a drain bend (6), characterized in that, A feed line is installed obliquely upward on the upper part of the housing (1), and the feed line is connected to the sampling valve (5). A receiving valve (2) is provided on the lower part of the housing (1). A conical baffle (3) is installed inside the housing (1), and the conical baffle (3) is fixedly connected to the inner wall of the housing (1) by a fastener (11); A nitrogen purging line (7) is provided at the venting bend (6), and the nitrogen purging line (7) is connected to the conical purging port (8), which is located at the center of the conical baffle plate (3).

2. The PTA powder sampling device as described in claim 1, characterized in that, The shell (1) is provided with lifting lugs (4) on both sides, which are used to fix the shell (1).

3. The PTA powder sampling device as described in claim 1, characterized in that, The conical baffle (3) is provided with an annular baffle one (10), and the housing (1) is also provided with an annular baffle two (9). The annular baffle one (10) and the annular baffle two (9) are arranged in a cross pattern and the annular baffle two (9) is located above the annular baffle one (10).

4. The PTA powder sampling device as described in claim 3, characterized in that, The shell (1), feed line, discharge bend (6), conical baffle (3), annular baffle one (10) and annular baffle two (9) are all made of 304 stainless steel.

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