CN218932062U - Sewage disposal system for waste tire cracking mixed oil - Google Patents

Abstract

The utility model provides a sewage disposal system for waste tire pyrolysis mixed oil, which effectively solves the problems of difficult sewage disposal control, poor operating environment and low sewage disposal speed. The utility model comprises a sewage buffer tank, an inlet shutoff valve, an outlet shutoff valve, a regulating valve, a liquid level meter and a filter layer; the sewage disposal buffer tank is provided with an oil stain inlet, a nitrogen inlet and a waste oil outlet, wherein the nitrogen inlet is used for being connected with a nitrogen supply system, the waste oil outlet is used for being connected with a waste oil collecting system, and the oil stain inlet is used for being connected with a sewage disposal outlet of the oil tank; the regulating valve is arranged at the greasy dirt inlet of the blowdown buffer tank; the inlet shutoff valve is arranged at the nitrogen inlet of the pollution discharge buffer tank; the outlet shutoff valve is arranged at the waste oil outlet of the pollution discharge buffer tank; the liquid level meter is arranged on the sewage draining buffer tank; the filter layer is arranged in the sewage disposal buffer tank.

Description

Sewage disposal system for waste tire cracking mixed oil

Technical Field

The utility model relates to a sewage disposal system for waste tire cracking mixed oil.

Background

Scrap tires are complex mixtures made from rubber, carbon black, wire skeletons, and other inorganic additives, etc., and the total amount of compounds in a tire is typically over one hundred. At present, the main treatment mode of the waste tyre in China is as follows: tire retreading, rubber powder, reclaimed rubber and thermal cracking. Wherein: the tire retreading is only suitable for worn tires with worn treads and good carcasses, the total amount of the discarded tires is less than 5% of the tire used for retreading, strict limitation is made on the use of the retreaded tires along with legal requirements of tire safety, and the use range of the retreaded tires is continuously narrowed; the production and processing cost of the rubber powder is very high, secondary pollution exists at the same time, and the application research and development of products downstream of the rubber powder is delayed, so that the market sales are poor, the market capacity is small, and the domestic waste tires cannot be thoroughly digested; the reclaimed rubber has complex production process, high energy consumption, secondary pollution in the production process and poor performance, so that the industry is limited by the related process; the thermal cracking technology is an ultimate treatment process of 'eating and squeezing clean' the waste tires, fuel oil, combustible gas, carbon black and the like are obtained through cracking and cracking reaction, and the products obtained through cracking are sold to markets as energy and industrial raw materials, so that the thermal cracking technology has good market prospect and is a main stream process in the current waste tire disposal industry.

Practical experience of established projects shows that with continuous running, carbon black is deposited on the mixed oil to condenseAn oil tank at the bottom of the tower. If the deposited carbon black is not cleaned in time, excessive accumulation can influence the normal operation of the cooling equipment, and the equipment pipeline is blocked. Therefore, the oil tank needs to be cleaned regularly to remove the mixed oil of the carbon black mixed at the bottom of the equipment. The pyrolysis oil drainage system in the current project adopts a mode of manually and periodically opening a drainage valve and taking away by using a temporary oil drum. The sewage disposal mode mainly has the following defects: 1. when in sewage disposal, manual operation is easy to cause fluctuation of oil level in the container, thereby affecting stable operation of equipment and even causing shutdown of main equipment; 2. sulfide and mercaptan malodorous substances exist in the pyrolysis oil, and the sulfur and mercaptan malodorous substances can be dissipated into the surrounding air during pollution discharge, so that the field operation environment is bad; 3. the kinematic viscosity of the pyrolysis oil is about 60.4mm ² Poor flowability at 40 ℃ and low pollution discharge speed; 4. because the temporary oil drum is adopted for connection, the operation space during pollution discharge needs to be considered, and the arrangement mode of the equipment is limited.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides a sewage disposal system with reasonable structural design for waste tire cracking mixed oil, which effectively solves the problems of difficult sewage disposal control, poor operating environment and low sewage disposal speed.

The utility model solves the problems by adopting the following technical scheme: a sewage disposal system for waste tire cracking mixed oil, which is characterized in that: comprises a sewage buffer tank, an inlet shutoff valve, an outlet shutoff valve, a regulating valve, a liquid level meter and a filter layer; the sewage disposal buffer tank is provided with an oil stain inlet, a nitrogen inlet and a waste oil outlet, wherein the nitrogen inlet is used for being connected with a nitrogen supply system, the waste oil outlet is used for being connected with a waste oil collecting system, and the oil stain inlet is used for being connected with a sewage disposal outlet of the oil tank; the regulating valve is arranged at the greasy dirt inlet of the blowdown buffer tank; the inlet shutoff valve is arranged at the nitrogen inlet of the pollution discharge buffer tank; the outlet shutoff valve is arranged at the waste oil outlet of the pollution discharge buffer tank; the liquid level meter is arranged on the sewage draining buffer tank; the filter layer is arranged in the sewage disposal buffer tank.

The regulating valve is a pneumatic regulating valve.

The inlet shutoff valve is a pneumatic shutoff valve.

The outlet shutoff valve is a pneumatic shutoff valve.

The liquid level meter is a remote liquid level meter.

Compared with the prior art, the utility model has the following advantages and effects: the nitrogen is used as a sewage power source, so that the problems of difficult sewage control, poor operating environment and low sewage speed are effectively solved, the automatic, clean, efficient and stable operation of the pyrolysis oil sewage system is realized, the on-site operating environment is improved, and the normal operation of the thermal cracking system is ensured.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

Detailed Description

The present utility model will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present utility model and not limited to the following examples.

The embodiment of the utility model comprises a blowdown buffer tank 1, an inlet shutoff valve 2, an outlet shutoff valve 3, a regulating valve 4, a liquid level meter 5 and a filter layer 6.

The sewage disposal buffer tank 1 is provided with an oil stain inlet, a nitrogen inlet and a waste oil outlet. The nitrogen inlet is used for connecting a nitrogen supply system, and the waste oil outlet is used for connecting a waste oil collecting system. The greasy dirt inlet is used for connecting with a sewage outlet of the oil tank.

The regulating valve 4 is arranged at the greasy dirt inlet of the blowdown buffer tank 1, and the regulating valve 4 is a pneumatic regulating valve.

The inlet shutoff valve 2 is installed at the nitrogen inlet of the blowdown buffer tank 1. The inlet shutoff valve 2 is a pneumatic shutoff valve.

The outlet shutoff valve 3 is arranged at the waste oil outlet of the blowdown buffer tank 1. The outlet shutoff valve 3 is a pneumatic shutoff valve.

The liquid level meter 5 is arranged on the sewage disposal buffer tank 1. The liquid level meter 5 is a remote liquid level meter.

The filter layer 6 is arranged in the sewage disposal buffer tank 1.

In this embodiment, it is necessary to collect the oil stains connecting the quench section pyrolysis oil tank 7 and the condenser pyrolysis oil tank 8 at the same time, so

The embodiment is provided with two sets, one set of greasy dirt inlet of blowdown buffer tank 1 is used for connecting the drain of quick-cooling section schizolysis oil tank 7, and the greasy dirt inlet of another set of blowdown buffer tank 1 is used for connecting the drain of condenser schizolysis oil tank 8.

The working flow of the utility model is as follows:

when the sewage disposal system is put into operation, the inlet shutoff valve 2 and the outlet shutoff valve 3 are closed, the regulating valve 4 is opened, and the sewage disposal is started by connecting the quenching section pyrolysis oil tank 7 and the condenser pyrolysis oil tank 8. The discharged greasy dirt enters the lower part of the sewage disposal buffer tank 1 after passing through the filter layer 6, and the mesh number of the filter layer 6 is selected and adjusted according to the actual running condition. During sewage discharge, the opening of the regulating valve 4 is controlled by the signal of the liquid level meter 5 to control the sewage discharge speed.

After the liquid level of the lower part of the sewage buffer tank 1 reaches a certain height, each valve acts after receiving a feedback signal of the liquid level meter 5, wherein the regulating valve 4 is closed, and the inlet shutoff valve 2 and the outlet shutoff valve 3 are opened. At this time, nitrogen (working pressure is 0.6 MPa) enters the sewage buffer tank 1, and the nitrogen pressure pushes waste oil in the sewage buffer tank 1 to be discharged to a waste oil collecting system. Due to the high kinematic viscosity of the pyrolysis oil (60.4 mm ² And/s (40 ℃ C.), so that the fluidity of the pyrolysis oil is poor without pushing the nitrogen pressure, and the self-flowing to the waste oil collecting system cannot be realized.

After the liquid level at the lower part of the sewage buffer tank 1 is reduced to a set value, nitrogen needs to be purged for 5min continuously so as to purge residual oil in the sewage buffer tank 1 and in the pipeline, avoid blockage of the sewage pipeline caused by condensation of pyrolysis oil, and close the inlet shutoff valve 2 and the outlet shutoff valve 3 after the whole sewage process is finished.

When in sewage discharge, the working effect of the filter layer 6 can be judged by the change rate of the liquid level signal of the oil discharge buffer tank 1, and if the change rate of the liquid level is lower than a set value, the filter layer 6 is judged to be replaced. At the moment, the regulating valve 4 is closed, the inlet shutoff valve 2 and the outlet shutoff valve 3 are opened, after the waste oil in the oil discharge buffer tank 1 is purged completely by nitrogen, the inlet shutoff valve 2 and the outlet shutoff valve 3 are closed, and then the filter layer is replaced.

In addition, it should be noted that the specific embodiments described in the present specification may vary from part to part, from name to name, etc., and the above description in the present specification is merely illustrative of the structure of the present utility model. All equivalent or simple changes of the structure, characteristics and principle according to the inventive concept are included in the protection scope of the present patent. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the utility model as defined in the accompanying claims.

Claims (5)

1. A sewage disposal system for waste tire cracking mixed oil, which is characterized in that: comprises a sewage buffer tank, an inlet shutoff valve, an outlet shutoff valve, a regulating valve, a liquid level meter and a filter layer; the sewage disposal buffer tank is provided with an oil stain inlet, a nitrogen inlet and a waste oil outlet, wherein the nitrogen inlet is used for being connected with a nitrogen supply system, the waste oil outlet is used for being connected with a waste oil collecting system, and the oil stain inlet is used for being connected with a sewage disposal outlet of the oil tank; the regulating valve is arranged at the greasy dirt inlet of the blowdown buffer tank; the inlet shutoff valve is arranged at the nitrogen inlet of the pollution discharge buffer tank; the outlet shutoff valve is arranged at the waste oil outlet of the pollution discharge buffer tank; the liquid level meter is arranged on the sewage draining buffer tank; the filter layer is arranged in the sewage disposal buffer tank.

2. A blowdown system for a scrap tire cracking mixed oil according to claim 1, wherein: the regulating valve is a pneumatic regulating valve.

3. A blowdown system for a scrap tire cracking mixed oil according to claim 1, wherein: the inlet shutoff valve is a pneumatic shutoff valve.

4. A blowdown system for a scrap tire cracking mixed oil according to claim 1, wherein: the outlet shutoff valve is a pneumatic shutoff valve.

5. A blowdown system for a scrap tire cracking mixed oil according to claim 1, wherein: the liquid level meter is a remote transmission liquid level meter.

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